frp tank specifications.pdf

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Augusta Fiberglass86 Lake Cynthia RdBlackville, SC 29817Website:www.augustafiberglass.com

Toll-Free: (800) 527-1572Tel: (803) 284-2246Fax: (803) 284-2309

Email:[email protected]

FRP TANK SPECIFICATIONS

TECHNICAL REQUIREMENTS

GENERAL

1.1 Work of this Section

1.1.1 General: The WORK of this Section includes providing all labor, equipment, materials, tools, supplies, fittings, andappurtenances required for the fabrication of fiberglass-reinforced plastic above ground tanks to the standard set forth byASTM D-3299 for Reinforced Thermoset Plastic Corrosion Equipment.

1.1.2 The items indicated under this Specification shall be furnished by manufacturers having experience in themanufacture of similar products and having a record of successful installations.

1.1.3 All fiberglass items shall be manufactured of material suitable for the service and shall be certified for such use on theshop drawings. Tanks shall be designed and checked for all loads to be incurred during shipment, service, including, butnot limited to wind and temperature stress.

1.2 SHOP DRAWINGS & SAMPLES, THE FOLLOWING SHALL BE SUBMITTED

1.2.1 SHOP DRAWINGS: Shop drawings shall include detailed and certified design calculations. The laminate sequenceused for all tanks must either be attached to or included on drawings used by the fabricators shop personnel.

1.2.2 Submit tank layout drawings showing dimensions, wall thickness, anchor layout, knuckle radii, nozzle location andorientation, and nozzle construction.

1.2.3 Submit installation instructions for installing tank on a concrete slab.

1.2.4 Submit tank manufacturers recommended bolt torque for flanges.

1.2.5 Submit a certificate listing the type of resin to be used, describing the manufacturers brand name.

1.2.6 Submit design calculations for structural design of walls and design of tie-down lugs.

1.2.7 Submit manufacturers certification that tank construction complies with ASTM D-3299 or D-4097, D-2563 level III andthese specifications.

1.2.8 Submit sample copies of the data forms and report forms for recording and reporting laboratory test data.

1.2.9 Nozzle schedule including size, mark, thickness, and rating.

1.2.10 Details of all clips and lugs for hold down lugs, pipe brackets, and anchor bolts, as integral parts of the tank. Pipesupports shall be spaced maximum 5 feet on centers.

1.2.11 Laminate sequence of construction and all materials of construction listed.

1.3 INDUSTRY STANDARDS

1.3.1 The tanks built to these specifications shall meet the requirements of ASTM D-3299 (no chop hoop allowed) forfilament wound tanks and D-4097 for custom contact molded fiberglass reinforced plastic.

1.3.2 Applicable Documents: This specification, together with the attached drawing plus any referenced codes or standards,constitutes a complete set of referenced codes or standards, constitutes a complete set of requirements for the tank underconsideration. Should a conflict occur between any of the applicable documents, the fabricator shall bring such conflict to

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the attention of the owner prior to start of fabrication.

1.3.3 The tanks shall be furnished complete, including all accessories as shown on the approved drawings.

1.4 NAMEPLATES: The tanks built to these applications shall have the following information printed on its nameplate:

1.4.1 Name of Manufacturer

1.4.2 Capacity in Gallons

1.4.3 Chemical Environment

1.4.4 Manufacturer Serial Number

1.4.5 Year Built

1.4.6 Name and Equipment Number

1.4.7 Purchase Order Number

1.4.8 Maximum Specific Gravity

1.4.9 Design Pressure and Temperature

1.4.10 Resin

1.5 The nameplate shall be installed and resin coated.

MATERIALS OF CONSTRUCTION

2.1 RESIN

2.1.1 All materials shall conform to that specified in the Purchasing specifications. The resin, unless otherwise specified,shall be as noted on the FRP Data Sheet. The same shall be used throughout the laminate unless otherwise specified.

2.1.2 The resin and all material shall conform to that specified in the FRP data sheet. The same resin shall be usedthroughout the laminate unless otherwise specified.

2.1.3 The resin used shall not contain fillers, unless specified. When specified, up to 5% by weight of thixotropic agent suchas fumed silica may be used for viscosity control. Thixotropic must not be used in the corrosion barrier. No dyes orpigments will be used unless authorized by the owner.

2.1.4 The cure system used for the resin shall be in accordance with the resin manufacturers current recommendations.

2.1.5 Proper curing of the resin is the fabricators responsibility. All products fabricated to this specification shall be cured toat least 90% of the minimum Barcol hardness specified by the resin manufacturer. This requirement applies to both interiorand exterior surfaces. (Note: The use of paraffin in the resin or the use of a polyester veil may lower the Barcol hardnessbelow the resin manufacturers specifications.)

2.1.6 A separately cured gelcoat shall not be used.

2.1.7 No chemical-resistant surface shall be acetone sensitive. Acetone sensitivity is defined as tackiness of the laminatesurface when rubbed with acetone.

2.2 REINFORCEMENT

2.2.1 Unless otherwise noted on the Engineering drawings or data sheet, one ply of chemical surfacing veil shall be C-Glass 10 mils thick.

2.2.2 Chopped strand mat shall be Type E (an electrical borosilicate) glass, 1 oz. Or 2 oz. per square ft., with silane finishand a styrene-soluble reactive binder.

2.2.3 Continuous roving used in a chopper gun for spray-up shall be Type E glass.

2.2.4 Woven roving shall be Type E glass, nominal 24 oz./sq. yd., 4 x 5 weave, with silane-type finish.

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2.2.5 Continuous roving used for filament winding shall be Type E glass with a silane-type finish.

3. DESIGN

3.1 GENERAL: It is the object of this Engineering Specification and associated drawing to afford the fabricator as muchdesign latitude as possibly, consistent with the basic requirements. Therefore, it is intended that the fabricator will haveample opportunity to utilize his particular know-how in the design and details of tank fabrication in order to productequipment which will be adequate for the intended purpose and at a minimum cost.

3.2 DESIGN OF DETAILS: Details are often indicted without being fully designed. This permits the equipment fabricator tosubmit a design for approval, and it is intended that the fabricator furnish a design based on the information given which willmeet the requirements of the job regarding strength, corrosion resistance, and work ability.

3.3 DESIGN BASIS

3.3.1 For custom contact molded storage tanks subject to hydrostatic head, the design stress shall be 10% of the minimumultimate tensile stress of the selected laminate thickness, thereby providing a factor of safety of 10:1 against shell or headrupture.

3.3.2 For filament wound tanks subject to hydrostatic head, the design stress shall be determined by the following formula:

SH = (ET) (Z) where:SH = Hoop Stress used for design psiET Hoop Tensile Modules of the total laminate psiZ = Allowable Strain 0.0010 in./in. max.

3.3.3 Tanks and similar equipment for installation outdoors shall be checked for wind loading. Four or more hold-downlugs shall be provided for vertical tanks.

3.3.4 Other design requirements such as hold down lugs, stiffener rings, lifting lugs, etc.

4. OWNER FURNISHED INFORMATION

4.1 The following information shall be furnished in the FRP data sheet with the request for quotation and with the purchaseorder:

4.1.1 Chemical environment, concentrations and specific gravity, including probably impurities and contaminants (interiorand exterior).

4.1.2 Abrasion or erosion problems.

4.1.3 Design basis.

4.1.4 Design pressure and temperature.

4.1.5 Operating pressure and temperature.

4.1.6 Test pressure

4.1.7 Resins, fillers, and pigments.

4.1.8 Special handling, including setting, vibration, load limits, shipping, etc.

4.1.9 Inspection requirements and extent of testing.

4.1.10 Request for list of all materials to be used in the fabrication.

4.1.11 Tanks or equipment for severe service to be so noted.

4.1.12 Post heat-curing requirements, if applicable.

5. VENDOR FURNISHED DRAWINGS AND INFORMATION

5.1 Approved Drawings: Upon approval by the owner, two (2) copies of the drawings listed below shall be submitted forrecord purposes. Any subsequent revisions to the drawings or procedures must be approved by the owner. Drawings must

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be checked and signed as checked before they will be accepted for approval.

a. All information supplied by the owner (Part 4 above).b. Certified dimensions of overall equipment, thickness, and attachments.c. Construction specifications.d. Shop testing procedures.e. Nozzle schedule, including size, mark, thickness and rating.f. Details of all nozzles, joints and reinforcements.

g. Details of all ladders, lifting, hold-down or support lugs.h. Specification for all supplied bolting and gaskets and accessory items.i. Equipment weight, empty.j. Equipment capacity (gallons).k. UV absorbers or other pigments, if applicable.l. Customer purchase order number, project and equipment number.

m. All materials of construction and laminate sequence of construction.n. Method used for post-heat curing, if applicable.o. Manufacturers product data literature for ultrasonic level indication equipment.p. Manufacturers product data literature for ultrasonic level indication equipment.

5.2 DESIGN CALCULATIONS

5.2.1 If specified by the owner, two copies of detailed design calculations shall be submitted for approval prior to beginningfabrication.

6. FABRICATION REQUIREMENTS

6.1 GENERAL

6.1.1 The fabricator shall not sublet any FRP component assembly without obtaining the owners approval in writing.

6.1.2 When pigmentation is specified, the pigment shall be dispersed in the resin used for the finish coat of the laminate.

6.2 SHELL AND HEAD REQUIREMENTS

6.2.1 The minimum wall thickness shall be regardless of operating conditions.

6.2.2 Unless otherwise specified, all vertical tanks shall be of flat-bottomed construction, continuously supported on a flatconcrete pad, or equivalent.

6.2.3 The knuckle radius of all flat-bottomed tanks shall be 1 minimum.

6.2.4 The shell shall be made of one manufactured section. No body joints will be allowed. If any body joints are requiredthey shall be in the upper 1/3 of the shell.

6.3 LAMINATE REQUIREMENT

6.3.1 The outer surface of the fabricated product shall be relatively smooth and no glass fibers shall be exposed. Oncustom contact molded equipment the final ply shall be mat or spray-up. The addition of reinforcement over this finishsurface is optional and if required, will be specified in the FRP Data Sheet.

6.3.2 An ultraviolet stabilizer shall be incorporated in the final coat of resin. The amount of stabilizer shall be per the resinmanufacturers recommendation.

6.3.3 All edges of reinforcement material shall be lapped: 1 minimum format, and 2 minimum for woven roving. Lappededges of adjacent layers shall be staggered.

6.3.4 On laminates containing woven roving, cut edges exposed to the chemical environment shall be coated with resin andsurfacing mat, and all other cut edges may be coated with resin only. The resin used shall be designated in the purchasespecification and must contain paraffin to assure adequate surface cure.

6.3.5 Mold release agents such as MELINEX polyester film or PVA must be removed prior to inspection and shipment.

6.4 EQUIPMENT AND TANK CONNECTIONS

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6.4.1 Unless otherwise specified, all connections on equipment and tanks shall be flanged.

6.4.2 Manways on storage tanks and equipment shall be 24 I.D. minimum.

6.4.3 All flanges shall be made by the hand lay-up construction. Press molded flanges are not acceptable. Flange shall bemanufactured of one-piece construction with integral stub.

6.4.4 The machine facing of the back of hand lay-up flanges is not permitted. All bolt holes shall be spot faced for SAE sizewashers if required.

6.4.5 Flange drilling on pipe connections shall be in accordance with ANSI B-16.5 for 150-psi pressure class.

6.4.6 All nozzles 4 diameter or less, shall be reinforced with plate gussets. Conical gussets having comparable strengthmay be substituted for the plate gussets.

6.4.7 Bolt holes in flanged nozzles are to straddle the vertical centerline. Tolerance in bolt holes location and in diameter ofbolt circle shall be as specified.

6.4.8 On all flanged joints, use 1/8 thick full-faced neoprene gaskets having a specified Shore A Durometer hardness.Supplied by others, unless otherwise specified on data sheets.

6.4.9 Reinforcement of nozzle and manhole openings in vessel walls shall be in accordance with the requirements of ASTMD 3299. The reinforcement pad shall consist of alternate piles of mat and woven roving. The edges of all reinforcingoverlays shall be tapered to avoid abrupt change in overall thickness of vessel laminates.

6.5 FIELD JOINTS

6.5.1 Where the field joining of FRP components is required, the fabricator shall furnish all necessary materials. Fabricationprocedures shall conform to the requirements of this specification.

6.5.2 Unless field forces are known to be thoroughly competent in FRP lay-up procedures, a vendor erection supervisorshall be present when field joints are made.

6.6 POST CURING. Where drawings call for post curing of the interior surfaces, it shall consist of a cure temperature of atleast equal to the vessel design temperature, for a specified duration.

7. CLEANING

7.1 Prior to inspection, all dirt and extraneous materials shall be removed from the equipment interior. The fabricator shallremove all surface markings, coatings, or contaminants prior to inspection.

7.2 When equipment must be ready for use without further site cleaning, special cleaning and sealing requirements will beas detailed in the purchase specification.

8. SHIPPING

8.1 Whenever feasible, shipments shall be made by truck.

8.2 Tanks which are shipped in horizontal position shall be mounted on padded cradles. All tank end blocking used toprevent shifting of tanks must be padded and bare only upon the knuckle radius of the tank bottom.

8.3 Tanks shall be secured to the cradles or skids to prevent rotation or other movement. In turn, the cradles or skids shallbe fastened securely to the truck bed.

8.4 All tie-down straps shall give provision for thermal expansion and shall be padded where in contact with the equipment.

8.5 Flange faces shall be protected from damage by covering with suitable plywood or hardboard, securely fastened. Note:Tanks shall be positively vented at all times.

9.0 MANUFACTURER

9.1 The tank shall be manufactured by Augusta Fiberglass - Blackville, SC.