et 2000 manual

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ETank 2000 User Guide

Version 1.7.200

E-Ware Inc. FABRICATION, PETROCHEMICAL, AND MECHANICAL

ENGINEERED SOFTWARE SOLUTIONS FOR TANKS AND VESSELS

HEADQUARTERS

4611 Broad River Road, Ste I Columbia, SC 29210 USA Phone: +1.803.750.9055 Fax: +1.803.750.1654

E-WARE HQ, SALES WORLDWIDE: [email protected]

To pay online with your C.C., contact E-Ware HQ sales, or your local authorized ETank reseller.

OUTSIDE NORTH AMERICA SALES : CONTACT E-WARE HQ FOR RESELLER NEAREST YOU.

INTERNET SITE http://www.etank.com

TECHNICAL SUPPORT For E-Ware e-mail tech support addresses, view the contact page at ETanks internet site. VM / FAX ETank Help Line 24 hours a day: +1.702.543.2616 (USA). Provided by NNTE. If purchased from a reseller, contact them for tech support e-mail addresses.

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TABLE OF CONTENTS

Installing ETank 2000 TABLE OF CONTENTS................................................................................................................................................... 2 TABLE OF FIGURES ...................................................................................................................................................... 6 INTRODUCING ETank 2000............................................................................................................................................ 7

The ETank User ........................................................................................................................................................... 7 The ETank Company.................................................................................................................................................... 7 ETank Features............................................................................................................................................................ 7 Limited Warranty.......................................................................................................................................................... 8 Versions of ETank ........................................................................................................................................................ 8 Licensing ETank........................................................................................................................................................... 8 Support and Update Subscriptions (SUS) ..................................................................................................................... 9 ETank SUS Benefits..................................................................................................................................................... 9 Upgrading ETank FOR DOS to ETank 2000................................................................................................................. 9 DEMO Software Distribution Policy .............................................................................................................................. 9 IMPORTANT!!.............................................................................................................................................................. 9 Referral Benefits .......................................................................................................................................................... 9 Before you Un-Install or Re-Install the ETank 2000 Demo ...........................................................................................10 ETank 2000 Full Version Install Notes .........................................................................................................................11 ETank 2000 Mobile User Version Install Notes ............................................................................................................11 ETank FIRST RUN : SET OPTIONAL ETank DB SECURITY......................................................................................12 What is DB Security? ..................................................................................................................................................12 Set the DB Login Password (optional)..........................................................................................................................12 Set the DB File Deletion Password (optional) ..............................................................................................................13 REGISTERING ETank Full Version (for legacy customers with FV only) .....................................................................14 ETank License Exclusive Benefits...............................................................................................................................15 Expert Tank Design and Software Tech Support .........................................................................................................15

KEYBOARD AND MOUSE CONTROL OF ETank ..........................................................................................................16 Legacy Keystroke Commands (ETank for DOS compatibility) .....................................................................................16 Windows Keystroke Commands ..................................................................................................................................16 Mouse Control (version 1.2 and later) ..........................................................................................................................16

OPENING AND CREATING TANK FILES ......................................................................................................................17 Open Tank File Screen................................................................................................................................................17 Importing and Exporting Tank Files .............................................................................................................................17

ETank CONFIGURATION WINDOW..............................................................................................................................18 Tools > Options > General Tab ...................................................................................................................................18 Tools > Options > Colors Tab......................................................................................................................................21 Tools > Options > Behavior Tab..................................................................................................................................22 Tools > Options > Archive Options Tab .......................................................................................................................23 Tools > Options > Design Tab .....................................................................................................................................24

TANK SETUP SCREEN..................................................................................................................................................27 Job Number.................................................................................................................................................................27 Date of Calculations ....................................................................................................................................................28 Date of Fabrication or Inspection.................................................................................................................................28 Designer, Project, Tag, Plant, Plant Location, Site.......................................................................................................28 Standard .....................................................................................................................................................................28 API 650 Appendix A or J .............................................................................................................................................28 Mode: Design or Re-Rate ............................................................................................................................................28 Remarks......................................................................................................................................................................28 Keystroke Options .......................................................................................................................................................29 Mouse Options ............................................................................................................................................................29

DESIGN DATA SCREEN................................................................................................................................................30 Outside Diameter of Tank............................................................................................................................................30 Shell Height.................................................................................................................................................................30 Design Pressure at Top of Tank ..................................................................................................................................30 Design Vacuum at Top of Tank ...................................................................................................................................31 Design Temperature of the Tank .................................................................................................................................31 Seismic Zone ..............................................................................................................................................................31 Importance Factor .......................................................................................................................................................31

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Site Amplification Factor .............................................................................................................................................31 Basic Wind Velocity.....................................................................................................................................................31 Contents of Tank .........................................................................................................................................................32 Specific Gravity of Contents........................................................................................................................................32 Joint Efficiency............................................................................................................................................................32 Roof Type ...................................................................................................................................................................32 Bottom Type................................................................................................................................................................32

ROOF DESIGN SCREEN...............................................................................................................................................33 Roof Input Data ...........................................................................................................................................................34 Roof Material (All) .......................................................................................................................................................34 Pitch of Roof (S.S. Cone / Structural Cone).................................................................................................................34 Dish Radius of Roof (Dome or Umbrella).....................................................................................................................34 Roof Plate Corrosion Allowance (All) ...........................................................................................................................34 Live Load (All) .............................................................................................................................................................35 Ground Snow Load (All) ..............................................................................................................................................35 Roof Insulation Thickness (All) ....................................................................................................................................35 Roof Insulation Density (All) ........................................................................................................................................35 Frangible Roof Design (S.S. Cone)..............................................................................................................................35 Compression Ring Detail (S.S. Cone, Dome, Umbrella) ..............................................................................................35 Roof Weld Type at Compression Ring (S.S. Cone, Dome, Umbrella) ..........................................................................35 Length of Angle Leg Parallel to Shell (S.S. Cone, Dome, Umbrella) ............................................................................35 Toriconical / Torispherical Head (All except Structural and Flat Roofs)........................................................................36 Knuckle Radius (All except Structural and Flat Roofs) .................................................................................................36 Flange Length (All except Structural and Flat Roofs)...................................................................................................36

FLAT ROOF DESIGN.....................................................................................................................................................37 Roof Attachment Type.................................................................................................................................................37 Roof Bolt Circle ...........................................................................................................................................................37 If Stayed Roof, Enter Pitch ..........................................................................................................................................37

STRUCTURAL CONE ROOF DESIGN...........................................................................................................................38 Supported Roof Restrictions and Assumptions* (ETank 1.7 or earlier) .........................................................................38 Number of Intermediate Girder Rings ..........................................................................................................................38 Girder Ring Detail Screen............................................................................................................................................38 Rafter Types List Box ..................................................................................................................................................40 Rafter Selection Screen...............................................................................................................................................40 Adding User-Defined Beams on the Beam Selection Screens .....................................................................................41 Girder Types List Box ..................................................................................................................................................42 Girder Selection Screen ..............................................................................................................................................42 Column Types List Box................................................................................................................................................42 Column Selection Screen ............................................................................................................................................42

SHELL DESIGN SCREEN ..............................................................................................................................................43 API-650 Shell Design Method (Standard API 650) .......................................................................................................43 Shell Weld Type..........................................................................................................................................................43 Maximum Liquid Level ................................................................................................................................................43 Use Maximum of either S.G. or 1.0 (Mode Re-Rate, Standard API 650)......................................................................44 Shell Insulation Thickness ...........................................................................................................................................44 Shell Insulation Density ...............................................................................................................................................44 Adding a Shell Course.................................................................................................................................................44 Shell Course List Box ..................................................................................................................................................44 Removing a Shell Course............................................................................................................................................44 Edit Shell Course Width ..............................................................................................................................................44 Edit Shell Course Material ...........................................................................................................................................44 Edit Actual Shell Course Thickness .............................................................................................................................45 Edit Shell Course Corrosion Allowance........................................................................................................................45

ANCHOR DESIGN SCREEN..........................................................................................................................................46 Number of Anchors .....................................................................................................................................................46 Diameter of Anchor Bolt Circle ....................................................................................................................................46 Anchor Bolt Material ....................................................................................................................................................47 Anchor Bolt Corrosion Allowance.................................................................................................................................47 Nominal Anchor Bolt Size............................................................................................................................................47 Calculate Anchor Chairs? ............................................................................................................................................47 Autocompute Anchor Chairs? ......................................................................................................................................47

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Chair Material..............................................................................................................................................................47 Chair Top Plate Type ..................................................................................................................................................47 Chair Style ..................................................................................................................................................................47 a Chair Top Plate Width ...........................................................................................................................................47 b Chair Top Plate Length..........................................................................................................................................48 k Chair Vertical Plate Width......................................................................................................................................48 c Chair Top Plate Thickness.....................................................................................................................................48 e Load eccentricity ...................................................................................................................................................48 f Distance between the front of the Top Plate and the Bolt Hole Edge ......................................................................48 g Distance between Vertical Plates...........................................................................................................................48 h Height of Anchor Chair ..........................................................................................................................................48 j Vertical Plate Thickness .........................................................................................................................................48

BOTTOM DESIGN SCREEN..........................................................................................................................................49 Bottom Plate Material ..................................................................................................................................................49 Bottom Plate Corrosion Allowance...............................................................................................................................49 Actual Bottom Plate Thickness ....................................................................................................................................49 Reinforced Lining? (Flat Bottom, Mode Re-Rate) ........................................................................................................49 Leak Detection? (Flat Bottom, Mode Re-Rate) ............................................................................................................50 Cathodic Protection? (Flat Bottom, Mode Re-Rate) .....................................................................................................50 Original Thickness of First Shell Course (Flat Bottom, Mode Re-Rate) ........................................................................50 Number of Shell Elevation Measurements Taken (Flat Bottom, Mode Re-Rate) ..........................................................50 Shell Elevation Measurements List Box (Flat Bottom, Mode Re-Rate).........................................................................50 Pitch of Conical Bottom (Cone) ...................................................................................................................................51 Radius of Domed Bottom (Dome)................................................................................................................................51 Dead Load (Cone, Dome)............................................................................................................................................51 Fixed Load (Cone, Dome) ...........................................................................................................................................51 Compression Ring Detail (Cone, Dome) ......................................................................................................................51 Roof Weld Type at Compression Ring (Cone, Dome)..................................................................................................51 Length of Angle Leg Parallel to Shell (Cone, Dome)....................................................................................................51 Toriconical / Torispherical Head (Cone, Dome) ...........................................................................................................52 Knuckle Radius (All except Structural and Flat Roofs) .................................................................................................52 Flange Length (All except Structural and Flat Roofs)...................................................................................................52

COMPRESSION RING / WIND GIRDER DESIGN SCREEN..........................................................................................53 Roof Compression Ring / Top Wind Girder Type.........................................................................................................53 Angle Type (ROOF COMP RING) ...............................................................................................................................53 Number of Intermediate Wind Girders .........................................................................................................................53 Intermediate Wind Girder Type ...................................................................................................................................54 Angle Type (Intermediate Wind Girder) .......................................................................................................................54 Bottom Compression Ring...........................................................................................................................................54 Angle Type (Bottom Comp Ring)................................................................................................................................54 Add a USER DEFINED angle to the ETank data DB....................................................................................................55

NORMAL & EMERGENCY VENTING DESIGN SCREEN...............................................................................................56 Calculating Venting Requirements...............................................................................................................................56 Product Flash Point .....................................................................................................................................................56 Maximum Fill Rate ......................................................................................................................................................56 Maximum Empty Rate.................................................................................................................................................57 Is Drainage away from the Tank Provided ...................................................................................................................57 Thickness of Non-Combustible Insulation ....................................................................................................................57

NOZZLE & MANWAY DESIGN SCREEN.......................................................................................................................58 Adding a Nozzle or Manway ........................................................................................................................................58 Removing a Nozzle or Manway ...................................................................................................................................58 Simple Nozzle Calculations (API-650 tables)** ............................................................................................................58 Simple Nozzle Calcs - Input Data ................................................................................................................................59 Naming a Nozzle.........................................................................................................................................................59 Type of Nozzle ............................................................................................................................................................59 Size.............................................................................................................................................................................59 Flange Facing .............................................................................................................................................................59 Schedule .....................................................................................................................................................................59 Height .........................................................................................................................................................................59 Reinforcement Pad Thickness.....................................................................................................................................59 Reinforcement Pad Diameter or Length.......................................................................................................................59

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Reinforcement Pad Width ...........................................................................................................................................59 Detailed Nozzle Calculations (API-620 method)**........................................................................................................60 Detailed Nozzle Calcs Input Data .............................................................................................................................60 Material .......................................................................................................................................................................60 Neck Joint Efficiency ...................................................................................................................................................60 Area Joint Efficiency on Which nozzle is Mounted.......................................................................................................60 Neck Thickness ...........................................................................................................................................................61 Corrosion Allowance....................................................................................................................................................61 Length of Internal Projection........................................................................................................................................61 Fillet Weld Thickness at Repad OD.............................................................................................................................61 Fillet Weld Thickness at Nozzle OD ............................................................................................................................61 Nozzle ID ....................................................................................................................................................................61 Length of External Projection ......................................................................................................................................61 Orientation on Shell.....................................................................................................................................................61 **Detailed Nozzle Calculations ....................................................................................................................................61 Viewing Individual Nozzle Reports...............................................................................................................................61

PIPE SCHEDULE AND COUPLING WINDOW...............................................................................................................62 REPORT VIEWER WINDOW.........................................................................................................................................63

How-To : View Full Tank Report ..................................................................................................................................63 How-To: View Specific Reports ...................................................................................................................................63 Command : Print Report (x pages) ..............................................................................................................................64 Command : Save to Disk.............................................................................................................................................64 Command : Copy Report .............................................................................................................................................64 Option : Keep Page Marker on Copy ...........................................................................................................................64 Keystrokes ..................................................................................................................................................................65 Mouse .........................................................................................................................................................................65

HOW-TO USE THE ETANK BLANK REPORT TEMPLATE............................................................................................66 MATERIAL EDITOR WINDOW.......................................................................................................................................67

Navigation...................................................................................................................................................................67 Adding a Material to ETank .........................................................................................................................................67 Material Name.............................................................................................................................................................67 API-650 Listed?...........................................................................................................................................................68 SI Units? (future use)...................................................................................................................................................68 Defunct?......................................................................................................................................................................68 Adopted?.....................................................................................................................................................................68 Imported?....................................................................................................................................................................68 Classification...............................................................................................................................................................68 Allowed Types.............................................................................................................................................................68 Allowed Groups...........................................................................................................................................................68 Sy (PSI) ......................................................................................................................................................................69 Sut (PSI) .....................................................................................................................................................................69 Sa 620 (PSI)................................................................................................................................................................69 Density (LBF/IN3) ........................................................................................................................................................69 Max T (IN.) ..................................................................................................................................................................69 R100 , R150, R200, R201, R250, R300, R350, R400, R450, R500 .............................................................................69 E100, E200, E300, E400, E500 (x 106 psi) ..................................................................................................................69 SY200, SY300, SY400, SY500 (PSI)...........................................................................................................................69 ASME Chart (Version 1.4 or later) ...............................................................................................................................69

Archiving ETank Tanks and Materials Data and Restoring Archives................................................................................70 How ETank Stores Data ..............................................................................................................................................70 One-Click ETank Database Updates..........................................................................................................................70 Archiving ETank Databases ........................................................................................................................................70 Where are the Archive Databases? .............................................................................................................................70 Accessing an Archive (not available in Demo).............................................................................................................71 Compacting ETank Databases ....................................................................................................................................71 Exporting Tank Files to Disk........................................................................................................................................71

Automatically Exporting Tank Files to Disk .....................................................................................................................72 TROUBLESHOOTING....................................................................................................................................................73

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TABLE OF FIGURES

Figure 1: ETank 1.6.600 and earlier: If You Un-Install ETank Demo, do NOT remove shared files..................................10 Figure 2: ETank 1.6.700 and later use an MSI installation package. So the 'Remove None' option should not be

necessary. ...............................................................................................................................................................10 Figure 3: PC must have USB Port for USB Hasp Key .....................................................................................................11 Figure 4: On First Run of ETank Demo, you can Setup Optional DB Security .................................................................12 Figure 5: If you assign a Login Password, you must enter it before ETank will run. .........................................................12 Figure 6: If you assign a File Deletion Password, you must use it to delete a tank file. ....................................................13 Figure 7: In ETank Demo go to Help=>About, and click the Register Button ...................................................................14 Figure 8: After clicking Register... Button, ETank Demo Displays Registration Instructions .............................................14 Figure 9: When running ETank, click the status bar panels to select Functions or change mode and standard................16 Figure 10: The Tank Setup Screen .................................................................................................................................27 Figure 11: The Tank Design Data Screen .......................................................................................................................30 Figure 12: Real-Time Roof Output Data..........................................................................................................................34 Figure 13: In the Girder Ring Detail Screen, click the Ring # column entry to edit the Ring Radius, Number of Girders,

and Number of Rafters for that girder ring. ...............................................................................................................38 Figure 14: On the Rafter Selection Screen, Click the top list box entry to select it, then assign a rafter to it by clicking on

an entry from the bottom beam list...........................................................................................................................40 Figure 15: On the Selection Form for Rafters, Girders, or Columns, you can add a custom Beam to ETank by hitting the

[Insert] key when the bottom list is selected, or by clicking Create New button. .................................................41 Figure 16: Shell Design Screen. The edit controls are displayed when you select a shell course number. .....................43 Figure 17: Anchor design screen.....................................................................................................................................46 Figure 18: Bottom design screen.....................................................................................................................................49 Figure 19: Intermediate Wind Girder design screen. .......................................................................................................53 Figure 20: When adding a User Defined Angle, you must enter a description, the section modulus, and the cross-

sectional area for it. .................................................................................................................................................55 Figure 21: Venting design screen. ..................................................................................................................................56 Figure 22: On Nozzle Design Screen, select the Size box, then hit [F1] to display the International Pipe Schedule. ........62 Figure 23: Report Viewer, with page marker checked, permits copying the report into the ETank Blank Report template,

and utilizing the macro to properly insert page breaks. .............................................................................................64 Figure 24: Go to Tools=>Materials Editor to open the Materials Editor utility...................................................................67 Figure 25: Navigation buttons and list box on the Material Editor allow you to view ETank's existing materials. ..............67

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INTRODUCING ETank 2000

The ETank User ETank is software for the practicing engineer as an aid to design. As such, it is intended to supplement rather than replace the engineers skill and judgment. Numbers generated by ETank may be meaningless or even incorrect for a given application if the input data has not been wisely chosen. It is the users responsibility to employ this program and its results in a sound and proper manner. The ETank Company ETank is used worldwide by large and small fabrication firms, as well as tank inspection companies (who re-rate ASTs in accordance to API-653). For a sample of our ETank customer list, visit the ETank Internet site. ETank Features ETank performs calculations for designing or re-rating welded steel or aluminum vertical above-ground storage tanks (ASTs). Tank fabricators and tank inspectors use etank to verify tanks are built in accordance with U.S.A National Standards, including: American Petroleum Institutes API-650 (Appendices A, J, E, F, M, S), API-620 (Incl.

Appendix L), API-653 (Incl. Appendix B), and API-2000. Underwriters Laboratories UL-142 (Vertical Tanks). ANSI B96.1 (Aluminum Tanks) Structural Roof design and other Best Engineering Practices, including Brownell &

Young, Jawad, and AISI.

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Limited Warranty E-Ware strives to ensure correct output based on accepted engineering practices, but software errors may occur, and it is the responsibility of the user to notify E-Ware, Inc of any engineering or software errors found within ETank. If the customer owns a current valid ETank license, E-Ware will release program fixes as soon as possible, most of the time within 24 hours. E-Ware cannot warranty that ETank suits your purpose. Take a look at the Features list above. Read this manual and exercise ETank. Only by becoming an ETank Demo User can you determine if ETank will meet your needs. It is the Demo Users responsibility to evaluate all features of the program prior to purchase. This includes creating and saving tank files, designing and rerating tanks, and printing all the related reports. Versions of ETank 1. ETank 2000 Demo allows only three tank diameters, and you cannot export or

import tank files, but otherwise it is a fully functional program. Download the ETank 2000 Demo for free from the ETank Internet site. http://www.etank.com/

2. ETank 2000 Full Version The FV uses software security and can run on a single pc.

It can only be run after it is unlocked using a registration code that is issued upon receipt of the registration file generated by the ETank 2000 Demo. (NOT FOR NEW SALES, ONLY SUS CUSTOMERS)

3. ETank 2000 Mobile User The MU uses a HASP hardware key to run on any PC with a

USB port (if necessary an LPT type key can be ordered. Contact E-Ware HQ for availability). (ALL NEW SALES).

Licensing ETank E-Ware offers volume-licensing discounts, in addition to the already competitive single License price. Take a look at our price list and see if you agree that ETank offers the best value of any CAE Tank Design software today. The price list is installed with the ETank Demo program, and there is a shortcut to it in the Start menu. For the latest price list, see www.etank.com

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Support and Update Subscriptions (SUS) New ETank customers are granted a 6-month SUS period. SUS Renewals can be purchased for 12-month periods. Discounts on multiple licenses are available for SUS renewals as well. Contact E-Ware HQ for SUS pricing. ETank SUS Benefits 1. STAY UP TO DATE: Youll always receive the latest ETank 2000 release, whenever

new API or tank design standards are added to ETank. 2. EXPERT TANK DESIGN AND TECH SUPPORT: youll also have BOTH software tech

support, AND tank design support at your fingertips, available either by phone or e-mail. If you are puzzled with a tank design issue, then e-mail E-Ware your question. Either the creator of ETank, Jeffcoat Smitt, or another fully experienced tank/vessel designer, will answer your tank-design questions.

3. LOWER COSTS: Youll save money when compared to allowing your SUS to expire. Upgrading ETank FOR DOS to ETank 2000 For existing E-Ware customers who have purchased ETank for DOS, In order to receive the discounted upgrade price, you must turn in your DOS Key Disk (or send a scanned image of a disabled notched key disk). DEMO Software Distribution Policy ETank is distributed as demo-ware. This means you are free to copy the ETank demo CD, install the ETank Demo on any PC in your office. While you may make a backup copy of ETank Demo on CDROM, please do not distribute it. IMPORTANT!! Refer other users to the ETank website to request latest ETank Demo links, so that they can be certain they are running the latest example of ETank. http://www.etank.com/ETankRequest.htm Referral Benefits There are referral benefits if you introduce someone to E-Ware, and they purchase ETank. Do not give them a copy of your ETank Demo, but instead please refer them to the ETank Internet site, or have them contact E-Ware (contact information at the front of this manual.)

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Before you Un-Install or Re-Install the ETank 2000 Demo Demo Un-Install: Always use Add / Remove Programs in the Windows Control

Panel to Remove ETank 2000 from your PC . (Start->Settings->Control Panel->Add/Remove Programs). Always remove any installed ETank 2000 program before attempting to re-install ETank 2000. When prompted to remove shared components, select Keep, or Remove None

Figure 1: ETank 1.6.600 and earlier: If You Un-Install ETank Demo, do NOT remove shared files.

Figure 2: ETank 1.6.700 and later use an MSI installation package. So the 'Remove None' option should not be necessary.

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ETank 2000 Full Version Install Notes Use the latest installer and notes included on your Full Version CD-ROM from E-Ware. ETank 2000 Mobile User Version Install Notes A. USB Port Required: USB Hasp Key is required to be connected to the PC where you

want to run ETank 2000 Mobile User Version.

Figure 3: PC must have USB Port for USB Hasp Key

B. Purple USB Key is Standalone: The Mobile User Version of ETank is for local PC execution. The MU version cannot be run over the network with the purple USB Key.

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ETank FIRST RUN : SET OPTIONAL ETank DB SECURITY

What is DB Security? ETank 2000 stores all user tank data and supporting data into two databases. The main DB is ETank2000.mdb, and the data DB is ETank2000DAT.mdb Using the DB security options below allows you protect your tank files in two ways: 1) You can keep others from running ETank, and / or 2) You can keep others from deleting your tank files while ETank is running. Set the DB Login Password (optional) This option uses a password to keep unauthorized people from running ETank 2000. When you run ETank for the first time, it will display the Setup ETank DB Security window (Figure 8). If you leave (NONE) as the password, ETank will not challenge you for the password on subsequent runs of ETank. To change the DB Login Password, use the Configuration Screen.

Figure 4: On First Run of ETank Demo, you can Setup Optional DB Security

If you assign a Database Login Password, you will be prompted to enter that password in order to run ETank. (Figure 9)

Figure 5: If you assign a Login Password, you must enter it before ETank will run.

If you lose your Login Password and cannot run ETank, there will be a fee for resetting your database. REMEMBER YOUR LOGIN PASSWORD, OR SELECT (NONE) TO DISABLE THE LOGIN PASSWORD.

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Set the DB File Deletion Password (optional) This option uses a password to keep other people from deleting your files while ETank 2000 is running. When you run ETank for the first time, it will display the Setup ETank DB Security form shown above. If you leave (NONE) as the password, ETank will not challenge you for the password when you select the Delete button on the Open File Screen. If you do assign a DB File Deletion Password, then on the Open File Screen, you will be prompted to enter the password in order to delete any files from the ETank database. (Figure 10).

Figure 6: If you assign a File Deletion Password, you must use it to delete a tank file.

File deletions are permanent when you use the Delete button on the Open File Screen.

Since all of your ETank files are stored in the ETank2000.mdb database, it is recommended that you periodically make backups of it to prevent accidental loss. Or you can use the Auto-Export / Backup feature in the Configuration Options screen (General Tab) to backup your tank files to a local or remote directory.

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REGISTERING ETank Full Version (for legacy customers with FV only) In order to run ETank Full Version, it must be registered. The Full Version uses software security and can only be installed to run a single PC (per license). Follow the steps below to register the Full Version. NOTE: If you do not have e-mail access, the registration instructions are also in the ETank Demo, Help=>About window (Figure 10). Click the Register button to see the instructions (Figure 11).

Figure 7: In ETank Demo go to Help=>About, and click the Register Button

Figure 8: After clicking Register... Button, ETank Demo Displays Registration Instructions

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ETank License Exclusive Benefits The ETank licensed versions do not have tank diameter restrictions, nor does they expire. Furthermore, as an ETank customer, you are granted a six-month SUS period. See the Section Support and Update Subscription for more information. Expert Tank Design and Software Tech Support E-Ware customers current with their SUS can receive tank design answers related to ETank (tank design email address will be given to new customers). You can email software technical support, or call the ETank help line 24 hours a day (see contact information at front of this manual.) E-Ware staff will strive to answer within 24 hours after receiving your messages, and usually in the same business day.

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KEYBOARD AND MOUSE CONTROL OF ETank

Legacy Keystroke Commands (ETank for DOS compatibility)

[ESC] On the Main ETank form, use this key to return to the previous design screen. On the Configuration Options form, or other forms with a Cancel button, use this key to close the form without committing changes.

[F1] Use this function key to display further option screens. For example: on the Supported Roof Screen, when your cursor is in the Number of Girder Rings field, hitting [F1] will bring up the girder ring design screen.

[F3] On the Main ETank form, use this function key to proceed to the next design screen.

[F5] If you are on the Setup Screen, then [F5] opens the Configuration Form. If you are on a Design Screen (e.g. Roof Design or after it), then [F5] displays the respective report showing calculations that have been made.

[F10] Use this function key to exit ETank.

Windows Keystroke Commands

[Tab] Move to the next control on the screen. [Shift][Tab] Move to the previous control on the screen. [Alt][F4] Exit ETank. [Enter] Used to select default OK button when displayed. [ESC] Used to select default Cancel button when displayed. [Alt][Shortcut key] Used to access the menu. For example: [Alt][F] will access the file menu. [Ctrl][Shortcut key] Used to select a menu item on the menu bar. For example: [Ctrl][O] is one

way to access the Open menu item of the File menu.

Mouse Control (version 1.2 and later) At the bottom of the ETank main screen, you will see a status bar panel. With the mouse, you can click on the status bar options, and ETank will execute those commands. For example, in Figure 13, below, you could click on the ESC, F3, Mode (Design or Re-Rate), or Standard (API-650, API-620, etc), panels. Notice the Report panel is disabled here, so clicking it would not do anything.

Figure 9: When running ETank, click the status bar panels to select Functions or change mode and standard.

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OPENING AND CREATING TANK FILES

When ETank 2000 first runs, there is no tank file open. The only menus that show when tank files are closed are the File Tools, and About menus. To open an existing ETank file, you may use key sequence F1, Ctrl-O, or Alt-F-O, or you can click the Open File button , or select the Open item from the File menu. To create a new ETank file, you may use key sequence Ctrl-N or Alt-F-N, or you can click the Open File button , or select the Open item from the File menu. Open Tank File Screen The ETank 2000 Open File screen displays two windows: 1. The left window shows you the complete ETank file list available to open by Job title. 2. The right window shows File Fingerprint, which is the summary design details of

any Tank file you select in the left window file list. Select a file from the File List text box, and you will see the file summary on the File Fingerprint text box. Click Open to open the ETank file, Delete to delete the ETank file, or Cancel to close the Open File form without opening a file. Importing and Exporting Tank Files If you have previously created ETank files using ETank for DOS, or exported Tank Files with ETank 2000, then you may import your existing files with the Full Version of ETank 2000: Click File->Import->ETank Tank File, or Ctrl-D NOTE: ETank 2000s Exported tank file extension is .TXT, and for ETank for DOS, the

tank file extension is .650 NOTE: The title of the exported tank file will be its Job Number.

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ETank CONFIGURATION WINDOW

To open the Configuration Options screen, go to menu Tools->Options. Using the Configuration Options screen, you can configure General, Color, Behavior, Archive Options, and Design settings for ETank to better suit your usage. The following tables describe the items you may change on each Tab, the data types or limits for each setting, and their effects on using ETank.

Tools > Options > General Tab The general tab is used for configuring general functionality in ETank. Item Description Data type / Limits Effects / Notes Option : Allow Network Printer

ETank will permit a UNC path to a printer to be used.

File Import / Export Path Folder for importing and exporting ETank tank files.

This permits two users to share tank files over the network and pool tank files into a common folder location.

Click the Browse button to locate the folder with a dialog box.

Text Any valid local or UNC (network) windows folder.

ETank will use this folder to perform any import or export functions.

When you use File > Export > This Tank (or All Tanks), ETank will open to this location, but you may override it.

If blank, ETank uses the installed folder location.

Option : Export Backup Option that makes ETank automatically save tank files to the export folder every time the user saves the tank to the ETank local database.

Yes / No Check box. Check means ETank will export all tank files saved to the folder shown in File Import / Export Path

Temporary File Path Folder for etank to use as a temporary file path during operation.

Text Any valid local or UNC (network) windows folder.

If blank, ETank uses the installed folder location.

Default Designer New tank file default setting.

Name of the person to fill in as the tank designer.

Text Max. length 50 On all new tank files, the Designer box will be filled in with this value.

Report Company Name Report setting.

Name of the company to appear in the header for each page on the ETank reports.

If blank, the printed reports will only show the Job name in the header.

If not blank, the printed reports will show both the Company name and the Job name in the header.

Report Left Print Margin (in.)

Report setting.

Left margin to set for reports. Depending on your printers limitations on

ETank currently creates the margin by padding the left side with whitespace. This is why the report font in ETank is fixed-width.

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margins, this may not be exact.

Report Lines per Page Report settings.

ETank will use this to determine when to insert a page break.

May not be exact, because ETank will check to ensure no orphan lines remain on the bottom of a page.

Command: Hasp Sharing

(Only on MU) ETank security setting.

Permits users with other ETank hasps to introduce and use their hasp on a PC where an original hasp was already operational.

Command: Change Login Password

Used to change the ETank login password.

You must verify the old password.

If (NONE) was previously used, then enter nothing.

Enter the new password, then verify it when prompted.

Entering a blank will reset the old password.

If a password is set, ETank will display the login screen for the local database, and you must login before ETank will run.

If a login password is not set, ETank will run without prompting a login.

Command: Change Deletion Password

Used to change the tank deletion password.

Same as above. On the Open file screen, if the deletion password is set, then you must enter it to delete a tank file from the database.

If the deletion password is not set, you can freely delete any tank file in the tank file list of the Open tank screen.

Command: Update Main Database

Performs any updates available for the ETank Main database.

The Main DB holds your tank files.

If the Main DB is up to date, this button will be grey, and will say Current MDB=nnn, where nnn is the Main DB version number.

If ETank detects your Main DB needs updating, it will prompt you once to go to this screen to click the button.

If your Main DB is up to date, this button will be disabled.

Command: Update Data Database

Performs any updates available for the ETank Data database.

The Data DB holds material data, user defined materials, structural beam data, nozzle data, etc.

If the Data DB is up to date, this button will be grey, and will say Current DDB=nnn, where nnn is the Data DB version number.

If ETank detects your Data DB needs updating, it will prompt you once to go to this screen to click the button.

If your Data DB is up to date, this button will be disabled.

Command: General Defaults

Reset certain values on the General Tab to the factory

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defaults.

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Tools > Options > Colors Tab

ETank by default uses the color scheme set for the Windows system it is running on. The color tab can be used to change the colors used.

Item Description Data type / Limits Effects / Notes Text Fore Color Sets the fore color of the

text controls. Choose a preset color from the drop-down list, or select other in the list to assign a custom color.

All text controls will display the color selected.

To assign default colors, click the Color Defaults command.

Text Back Color Sets the back color of the text controls.

Same as above. Same as above.

Frame Fore Color Sets the fore color of frames in ETank windows.


Frame Back Color Sets the back color of frames in ETank windows.


Form Fore Color Sets the fore color of all ETank windows.


Form Back Color Sets the back color of all ETank windows.


Message Fore Color Sets the fore color of Real-Time messages on the ETank design screens.


Command: Color Defaults Resets the color values on the Colors tab to the factory defaults.

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Tools > Options > Behavior Tab These options change the interaction level of ETank with the user. Item Description Data type / Limits Effects / Notes Option: Automatic Save Tank Files between Screen.

Option to have ETank automatically save the input data when you have a tank open and are navigating the design screens.

Yes / No check box. If checked, ETank will perform an automatic save to the local database.

Drop-down List: Cursor Selection.

When moving into a text box, this setting determines where and how the cursor is located in the text.

Choose All, Start, or End End Places the cursor at the end of the current text.

Start Places the cursor at the beginning of the current text.

All Highlights the current text.

Option: Use Silent Warning Messages

Determines if ETank displays Real-Time warnings only on the screen, or in addition use a pop-up box for showing warnings.

Yes / No check box. Check this box to minimize the pop-up warning messages ETank uses during tank design calculations.

Slider: Calculation Validation Delay.

Determines the length of time ETank waits after you finish typing in data before it validates the value and performs the Real-Time design calculations.

Number. Between 0.2 and 1.6 seconds.

ETank will wait this long before validating text input.

You should set this to suit your data entry speed.

Command: Behavior Defaults

Resets the values on the Behavior tab to the factory defaults.

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Tools > Options > Archive Options Tab Item Description Data type / Limits Effects / Notes Command: Change Main DB (tanks) Archive Options.

A new window displays the current Archive options for the Main DB.

This affects how ETank configures the Main DB archive when you use the menu

Tools > DB Utilities > Create Archive > Main DB

or menu

Tools > DB Utilities > Create Archive > All ETank Databases

Command: Change Data DB (Materials, etc) Archive Options.

A new window displays the current Archive options for the Main DB.

This affects how ETank configures the Data DB archive when you use the menu

Tools > DB Utilities > Create Archive > Data DB

or menu

Tools > DB Utilities > Create Archive > All ETank Databases

Option: Use Silent Warning Messages

Determines if ETank displays Real-Time warnings only on the screen, or in addition use a pop-up box for showing warnings.

Yes / No check box. Check this box to minimize the pop-up warning messages ETank uses during tank design calculations.

Command: Archive Defaults

Resets the values on the Archive Options tab to the factory defaults.

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Tools > Options > Design Tab These options change the calculation settings for ETank, as well as default tank file settings for new Tank files. Item Description Data type / Limits Effects / Notes Option: Default No API-650 App. F calculations when Tank Design Pressure (P) = Zero.

This sets the default value for No API-650 App. F calcs when Tank P = 0, on the Setup design screen.

Yes / No check box. If checked, ETank will skip App. F calculations for roof when the design internal pressure (P) is zero.

Default: Pressure Units This determines the default input units accepted for Design Pressure and Design Vacuum.

Drop-down list, non-editable.

English units permitted are PSI or Inches H2O.

Any open tank will use this setting.

Default: Shell Weld Type This determines the type of shell weld set for new tank files.


Select Butt Welded or Lap Welded.

New tanks will use this setting. Existing tanks are unaffected.

Default: Repad API-650 Design Basis for Tank Roof Nozzles.

This affects the simple Nozzle design calculations.

Jeffcoat


Select from: Use API Default in. t-Basis = roof t-Calc MAX t_rpr(Roof t-Calc, in.) MIN t_rpr(Roof t-Calc, in.)

Jeffcoat

Option: Summary Report MAWP / MAWV Calcs

Determines whether the summary page appears in the report to display the Maximum Allowable Working Pressure and Vacuum on the tank.

Yes / No check box. If checked, the MAWP / MAWV Summary appears in in the Full Report.

Option: Enforce API Minimum Thicknesses

Determines whether ETank enforces the API minimum thickness requirements.

Yes / No check box. Affects any open tank, in Design Mode.

This uses API minimums such as 3/16 for shell courses above the first shell course, as well as the roof. Other minimums may be affected.

If you enter a thickness less than the minimum, then it will be overridden by the API minimum.

Option: Enforce API Maximum Roof thickness

Determines whether ETank uses the API maximum roof thickness requirements.


This uses the API maximum of inch for self-supported roofs: cone, dome, and umbrella.

Other maximums may be affected.

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Option: Enforce Self-Supported Cone Minimum Pitch (2 in 12)

Determines whether ETank enforces a minimum for the roof pitch on self-supported cone roof tanks.

Yes / No check box. Affects any open tank.

Currently, 2 in 12 is the minimum recommended roof pitch.

Option: Use Maximum of Snow Load and Live Load.

Determines whether ETank considers the snow load and live load as mutually exclusive.


If checked, ETank uses the maximum of either the snow load or live load in the roof calculations.

If unchecked, ETank combines the Snow Load and Live Load in the roof calculations.

Option: Force Non-Annular Bottom to meet API-650 3.5.1

Determines whether ETank modifies the bottom design to make non-annular bottom plate stress acceptable, per API-650 3.5.1.


If checked, then for a non-annular flat-bottom tank ETank may reset the bottom shell course so that the bottom plate thickness meets the API requirements.

Set t-Actual to t-Design Values.

Determines whether ETank will automatically reset the t.Actual to t.Required for roof, shell, and bottom thicknesses.

Yes / No check box. Affects any open tank, in Design mode.

If checked, then ETank will automatically reset t.Actual if it is less than t.Required.

Maximum API-650 App. S or App. M Multiplier is 1

Determines if stress reduction factor for materials according to API can exceed 1.


A multiplier greater than one could increase design stress values, if the materials yield stress value is greater than the divisors specified in S.3.5.1 or M.3.6.

Enforce API Maximum Nozzle Sizes

Determines whether the nozzle size ranges shown in the API tables are enforced.


Use Jawad method in Stiffening Ring Calculations

Determines whether ETank uses the Jawad calculation methods for stiffeners are used in conjunction with the ASME formula.


Maximum Self-Supported Roof thickness (in.)

This overrides API maximum roof thickness, and can exceed the default (1/2 in.)

Number. Must be greater than zero.

Affects any open tank.

Maximum Corrosion Allowance.

This permits corrosion allowance to exceed the default of in.

Number. Must be greater than zero.

Affects any open tank.

Command: Design Defaults. Resets the values on the Design tab to the factory defaults.

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TANK SETUP SCREEN

When you create a new Tank file or load an existing one, ETank begins on the Setup Screen. On this screen you enter descriptive items such as job title, tank designer, project name, project site, project location, and tag number of the tank. Most importantly, you specify the ETank Mode of operation, as well as the Design Standard for ETank to use for tank calculations.

Figure 10: The Tank Setup Screen

Job Number The text entered in the JOB NUMBER field is for your reference, and will be used as the File Name for the Tank if you need to export your Tank file. Since you are using 32-bit windows, the file name (including path) can be up to 255 characters.

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NOTE: ETank for DOS Tank files have extension .650. ETank 2000 Tank files have extension .TXT Date of Calculations ETank automatically enters the last date that it made calculations. Date of Fabrication or Inspection Enter the date the tank was fabricated or inspected. Designer, Project, Tag, Plant, Plant Location, Site These job descriptions are for your reference, but can be left blank. Standard API-650: API-650 is used for the design of flat-bottomed, vertical storage tanks with pressures up to 2-1/2 psig and a maximum temperature of 500 degrees F. Roofs can be open-topped, self-supported conical or domed roofs, or structurally supported cones. ETank can optionally design tanks to Appendix A for small tanks and Appendix J for shop-assembled tanks. Appendix F is used if an internal pressure is specified. API-620: API-620 is used for the design of vertical storage tanks with a pressure of up to 15 psig and a maximum temperature of 250 degrees F. Tank bottoms can be either flat, conical or dished. Roofs can be open-topped, self-supported conical or domed roofs, or structurally supported cones. UL-142: UL-142 is used for the design of flat-bottomed tanks containing combustible or flammable liquids up to a design pressure of 1/2 psig. The maximum capacity of a UL-142 tank is 50,000 gallons. Roofs can be conical or domed. API 650 Appendix A or J When ETank is in Design Mode, and youve selected API-650 as the Standard, you will have the option of specifying API-650 Appendix A or J. Appendix A is the optional design basis for small tanks. Appendix J is the optional design basis for shop-fabricated tanks. Mode: Design or Re-Rate Choose Design for Design Mode or Re-Rate for Re-rate Mode. Tank Fabricators normally leave it in Design Mode, and API-653 Tank Inspectors usually use ETank in Re-Rate mode. If design mode is selected, ETank will strictly use the appropriate design code selected. If there is an aspect of the tank not covered by the code, then ETank will select an appropriate substitute. If re-rate mode is selected, ETank will use API-653 as a guideline along with API-650. Remarks Tank remarks are for your reference only. Limit remarks to 64,000 characters or less.

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NOTE: Only the first 700 characters will be saved if you Export a Tank File in ETank for DOS format (.650), Keystroke Options [F3] will advance ETank to the Design Data Screen. [F5] will Run the Full Report for the Tank. [F10] will exit ETank (not shown on status bar to reduce clutter). [ESC] will do nothing. (Previously it closed the program.) Mouse Options Clicking on the Status Bar Panels that display the Function Key options will activate that option.

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DESIGN DATA SCREEN

On the design data screen, the general parameters for your tank design are entered. You specify the overall dimensions, roof and bottom type, and operating conditions.

Figure 11: The Tank Design Data Screen

Outside Diameter of Tank Enter the outside diameter of the tank in feet. Shell Height Enter the overall height of the shell in feet. Design Pressure at Top of Tank Enter the design pressure in the vapor space of the tank at full liquid level in either psig (PSI) or inches water column (Inches H2O) (Default Pressure units are set in the Configuration Screen).

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You can enter pressure data in units different than the default unit expected by ETank by adding a unit suffix to the number. A pressure value entered without a unit suffix will be assumed to be in the default units that is selected in the Configuration Screen. By adding a unit suffix, ETank will convert the entry to the default units before running calculations. For example, if the default pressure unit is PSI and you want to enter a pressure of 12 Inches H2O, this can be accomplished by entering 12IN, or 12INCH or 12INCHES. If the default pressure unit is Inches H2O, and you wish to enter a pressure of 1 psig, then you could enter 1PSIG, or 1PSI. Design Vacuum at Top of Tank Enter the design vacuum in the vapor space of the tank at full liquid level in either PSI or Inches H2O. Unit conversions work the same as described for Design Pressure. Design Temperature of the Tank Enter the design temperature of the tank in degrees F. Seismic Zone Refer to Figure E-1 in API-650 illustrating seismic zones of the United States. Enter the correct zone from the figure or from your specifications. Entering a seismic zone of zero will prevent the program from performing a seismic analysis. [F1] when in this text box will show you a form displaying the Figure E-1 in API-650. You can select the appropriate seismic zone from the list. Importance Factor This is used in seismic calculations. The API-650 standard states that the factor should be 1.0 unless the purchaser specifies an increased value. The maximum value should be 1.25 and this value should be applied only to tanks that must provide emergency post-earthquake service or to tanks that store toxic or explosive substances in areas where an accidental release of the product would be considered dangerous to the safety of the general public. [F1] when in this text box will show you a form displaying the categories relating to Importance Factor. You can select the appropriate factor from the list. Site Amplification Factor Enter the factor according to the soil condition. See API-650 Table E-3 for appropriate coefficients. [F1] when in this text box will show you a form displaying the Table E-3 coefficients relating to soil conditions. You can select the appropriate coefficient from the list. Basic Wind Velocity Enter the maximum wind velocity the tank should experience, in miles per hour.

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Contents of Tank This is optional and is for information only. Specific Gravity of Contents Enter the specific gravity of the highest density liquid the tank should contain. Joint Efficiency Enter the joint efficiency to be used for the tanks bottom, shell, and roof plates. This value is based on the type of radiography performed. Range is 0.35 to 1. For example, enter 0.7 when re-rating a tank if the actual joint efficiency is unknown. Refer to API-653 3rd Edition, Table 4-2. Roof Type Click the down arrow to display the drop-down list of available roof types. Click an entry to make a selection. Roof type options include self-supported conical, self-supported domed or umbrella, open-top (no roof), structurally supported conical, or flat roof. Bottom Type Click the down arrow to display the drop-down list of available bottom types. Click an entry to make a selection. Bottom type options include annular flat, non-annular flat, conical, or dished.

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ROOF DESIGN SCREEN

- 34 -

Roof Type t-Design

t-Calc

P_m

ax_

inter

nal

P_m

ax_

exter

nal

Maxim

um

X-Se

ctiona

l Are

a Fo

r Fra

ngible

Roof

Minim

um

X-Se

ction

al Ar

ea

of Ro

of to

Shell

Joint

Actua

l X-

Sectio

nal A

rea

of Ro

of-to-

Shell

Joint

Knuc

kle

t-Calc

Knuc

kle

P_m

ax_

int

Roof

Weigh

t

Self-Supp. ConicalSelf-Supp. Conical (Frangible)

Self-Supp. Dome / UmbrellaSelf-Supp. Toriconical

Self-Supp. TorisphericalStructural Conical

Flat Figure 12: Real-Time Roof Output Data

Roof Input Data

NOTE: The following input fields are specific to the roof-type shown in parenthesis. Roof Material (All) Click the down arrow to display the drop-down list of available materials. Click an entry to make a selection. Pitch of Roof (S.S. Cone / Structural Cone) For both the conical roof and the supported cone roof, the pitch or slope of the roof must be entered. Notice the range of permitted Pitch is shown in the Pitch label next to the text box. For instance, in Design mode, for a non-frangible, self-supported conical roof, the pitch must be greater than or equal to 9 in/ft. For a frangible, self-supported conical roof, the pitch must be less than or equal to 2 in./ft. In Re-Rate mode, ETank allows a larger range of values. Dish Radius of Roof (Dome or Umbrella) In Design Mode, the maximum radius is 1.2 times the tank diameter, and the minimum is 0.8 times the tank diameter. In Re-Rate mode, ETank allows a larger range of values Roof Plate Corrosion Allowance (All) Enter the design corrosion allowance specified for the roof plates.

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Live Load (All) Enter the design live load (expressed as pressure) to be supported by the roof. The pressure exerted by a standing average-weight adult American male is about 25 PSF. Ground Snow Load (All) Enter the design snow load to be supported by the roof. Roof Insulation Thickness (All) Enter the thickness of the roof insulation. Roof Insulation Density (All) This is only used if the roof insulation thickness. Frangible Roof Design (S.S. Cone) A frangible roof is permitted only on self supported conical roofs. In Design Mode, Roof Pitch must be less than or equal to 2 in 12. Compression Ring Detail (S.S. Cone, Dome, Umbrella) This value is only available for roof types without a Knuckle Radius. This is only used when you have specified a roof compression ring on the Comp. Ring / Intermediate Wind Girder Design Screen. Enter the letter denoting the detail of the compression ring from API-650 Figure F-1. Valid values are A through I, or blank. Hitting [F1] while in this text box displays the API-650 compression ring detail diagram in a separate window. Roof Weld Type at Compression Ring (S.S. Cone, Dome, Umbrella) Select Butt Weld or Lap Weld to specify how the roof compression ring is attached to the tank. NOTE: Only available for roof types without a Knuckle Radius. NOTE: This is only used when you have specified a roof compression ring on the Comp. Ring / Intermediate Wind Girder Design Screen. Length of Angle Leg Parallel to Shell (S.S. Cone, Dome, Umbrella) Enter the length of the roof compression ring angle that is parallel to the top shell course plate. NOTE: Only available for roof types without a Knuckle Radius. NOTE: This is only used if you have 1) specified a roof compression ring on the Comp. Ring / Intermediate Wind Girder Design Screen, and 2) assigned the Compression Ring Detail (above) the value of D.

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Toriconical / Torispherical Head (All except Structural and Flat Roofs) Check this option when your top head design includes a knuckle and flange. If tank top head has a knuckle, then the variables related to the roof compression ring are not available, and a roof compression ring is not allowed. Knuckle Radius (All except Structural and Flat Roofs) Inside radius of top head knuckle. NOTE: In design mode, ETank will not allow a knuckle radius less than 6% of Tank OD. Flange Length (All except Structural and Flat Roofs) Enter the length of the roof flange to be used at the end of the top head knuckle.

- 37 -

FLAT ROOF DESIGN

On the Flat Roof Design Screen, additional text fields and list boxes are displayed. These are in addition to the variables described in the Roof Design Screen section. Roof Attachment Type Select Flanged or Bolted flat head type. If you select Bolted, then the Roof Bolt Circle text box is displayed (below). Roof Bolt Circle Enter the nominal flat roof bolt circle diameter. If Stayed Roof, Enter Pitch If your flat roof uses structural cross members, enter the largest unsupported length between them, or between them and the edge of the roof.

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STRUCTURAL CONE ROOF DESIGN

Supported Roof Restrictions and Assumptions* (ETank 1.7 or earlier) For ETank 2000 version 1.7 and earlier, you do not need to specify the number of columns, because ETank uses the following design restrictions and assumptions: 1) (Restriction) No Girders at Shell circumference. Rafters to shell can be assigned. 2) (Assumption) One column per girder in each intermediate girder ring. 3) (Restriction) Zero columns at shell circumference. 4) (Restriction) One center column. Depending on your tank height, your center

column might be composed of two or more pieces, but ETank is only interested in using the longest unsupported column length.

*NOTE: ETank uses the design method published in Brownell & Youngs, Process Equipment Design for structural roof calculations. On the Structural Roof Screen, most text boxes from the self-supported roof screen are shown. For the input data not covered here, you will find them covered in the Roof Design Screen section. In this section are described the additional text fields and list boxes displayed uniquely for the Structural Roof Design. Number of Intermediate Girder Rings Enter the number of intermediate girder rings to be used (rings of girders between the shell and the center column.) To display the Girder Ring Detail Screen, place the cursor in this text box and Hit [F1]. Alternatively, click the More button adjacent to the text box. Girder Ring Detail Screen

Figure 13: In the Girder Ring Detail Screen, click the Ring # column entry to edit the Ring Radius, Number of

Girders, and Number of Rafters for that girder ring.

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After hitting [F1] when in Number of Intermediate Girder Rings text box, or clicking the button next to it, you will see the Girder Ring Detail Screen. For each intermediate Girder Ring, you must specify the Ring Radius, Number of Girders and Number of Rafters. For the Shell Ring (circumference), you only need specify the Number of Rafters. ETank assumes no girders at shell circumference*. *NOTE: See the section above, entitled Supported Roof Restrictions and Assumptions.

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Rafter Types List Box In the list box you will see a listing of the currently selected rafter types for each inner Girder Ring as well as the outer Shell Ring. The number of Rings shown will be 1 plus the Number of Intermediate Girder Rings. To display the Rafter Selection Screen, place the cursor in this text box and Hit [F1]. Alternatively, click the More button adjacent to the text box. Rafter Selection Screen

Figure 14: On the Rafter Selection Screen, Click the top list box entry to select it, then assign a rafter to it by

clicking on an entry from the bottom beam list.

The top list box shows the rafter types currently selected for each inner girder ring (if present), and the shell ring. The bottom list box displays list of beam types available for selection. To make a rafter selection, first select the ring in the top list box you want to change, then click on the entry in the bottom list box you wish to assign. Once you have assigned rafters for each ring radius, click the Close button to return to the Structural Roof Design Screen. NOTE: The Required Z real-time calculation will continue to display undefined until the number of rafters and girders for that girder ring radius have been selected. See the section above, entitled Girder Ring Detail Screen.

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Adding User-Defined Beams on the Beam Selection Screens While you have the Rafter, Column, or Girder selection screen open, you can add a user-defined structural beam to the master list displayed on the bottom of the window. To add a new beam, select the bottom list box, and hit the [INSERT] key, or click the Create New [Rafter/Girder/Column] button to display text boxes for adding a beam to the list. Hit the [ESC] key, or click Cancel Create [Rafter/Girder/Column] button to cancel the addition. See Figure 19 for an example of the insert beam mode.

Figure 15: On the Selection Form for Rafters, Girders, or Columns, you can add a custom Beam to ETank

et 2000 manual

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