pheonwj-m-spe-0021~1 piping fabrication & installation

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PT. PHE ONWJ Piping Fabrication, Installation and Testing Specification

PHEONWJ-M-SPE-0021 Rev. 1 Page 2 of 22

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Revision Log Register

Revisions had been performed on following pages:

Page Date Revision

All 20 May 2012

Change Document number to PHEONWJ-M-SPE-0021 was

PHEONWJ-X-SPE-0001

Change PHE ONWJ Ltd become PT. PHE ONWJ

Update Header and Footer

Update Reference document with new document Number

4 of 22 20 May 2012 Add references of ASME B16.9 and ASME B16.11

5 of 22 20 May 2012

Corrected abbreviation for DN Diameter Nominal instead of

Diameter Number

16 of 22 20 May 2012 Revise interval calibration for pressure gauges and recorder





Table of Content

Revision Log Register ............................................................................................................................. 2

Table of Content ..................................................................................................................................... 3

1. Scope .............................................................................................................................................. 4

2. References ...................................................................................................................................... 4

3. Definition of Terms .......................................................................................................................... 5

3.1 Definitions ............................................................................................................................... 5

3.2 Terms ...................................................................................................................................... 5

4. Abbreviations .................................................................................................................................. 5

5. Fabrication ...................................................................................................................................... 6

5.1 Welding ................................................................................................................................... 6

5.1.1 Qualification of Welding Procedure ............................................................................. 6

5.1.2 Qualification for Welding ............................................................................................. 6

5.1.3 Welding Materials ........................................................................................................ 6

5.1.4 Preparation for Welding .............................................................................................. 6

5.1.5 Welding Requirements ................................................................................................ 7

5.2 Cutting .................................................................................................................................... 8

5.3 Preheating .............................................................................................................................. 8

5.4 Heat Treatment ....................................................................................................................... 9

5.4.1 Heat Treatment Requirements .................................................................................... 9

5.4.2 Heating and Cooling .................................................................................................... 9

5.4.3 Hardness tests ............................................................................................................ 9

5.4.4 Specific requirements .................................................................................................. 9

5.5 Bending and Forming ........................................................................................................... 10

5.5.1 General ...................................................................................................................... 10

5.5.2 Platform Piping Bend ................................................................................................ 11

5.5.3 Inspection .................................................................................................................. 12

6. Installation ..................................................................................................................................... 12

6.1 Alignment ............................................................................................................................. 12

6.1.1 Piping Distortions ...................................................................................................... 12

6.1.2 Flanged Joints ........................................................................................................... 12

6.2 Erection ................................................................................................................................. 12

6.2.1 Butt Welds ................................................................................................................. 12

6.2.2 Flange Connections and Bolt Joints ......................................................................... 13

6.2.3 Socket Weld Connections ......................................................................................... 14

6.2.4 Screwed Thread Connections ................................................................................... 14

6.2.5 Seal Welding ............................................................................................................. 14

6.2.6 Branch Connections .................................................................................................. 15

6.2.7 Expanded Joints and Special Joints ......................................................................... 15

6.2.8 Packed Joints ............................................................................................................ 15

6.2.9 Taper-Threaded Joints .............................................................................................. 15

7. Testing .......................................................................................................................................... 16

7.1 General ................................................................................................................................. 16

7.2 Pressure Testing ................................................................................................................... 16

7.3 Cleaning of Piping................................................................................................................. 16

8. Fabrication, Erection, Inspection, and Testing of Non Metallic Piping ....................................... 17





1. Scope

This specification covers the minimum requirements for the fabrication, installation, and testing

of piping systems for PT. PHE ONWJ, Onshore and Offshore Facilities.

This specification is not intended to testing of piping that has been placed in service.

Where local codes or regulations are more stringent than the specification, the requirements of

the local codes or regulations shall govern.

When required by the project specifications, piping materials shall be colour coded.

2. References

The following publications form a part of this specification. Unless otherwise specified herein,

use the latest edition.

PHE ONWJ Specifications:

PHEONWJ-I-PRC-0011 Quality Manual

PHEONWJ-L-SPE-0001 Painting Specification for External Metal Surfaces

PHEONWJ-M-SPE-0024 General Piping Design Specifications

PHEONWJ-M-SPE-0005 Piping Material Specification

PHEONWJ-M-SPE-0256 General Piping Systems Field Test Specification

PHEONWJ-M-SPE-0258 Cleaning Pickling and Passivating Procedure for Piping

PHEONWJ-W-SPE-0001 Specification for Pipeline Induction Bends

API (American Petroleum Institute):

API Spec 6A Wellhead and Christmas Tree Equipment

API RP 14E Recommended Practice for Design and Installation of

Offshore Production Platform Piping System

API 1104 Welding of Pipeline and Related Facilities

ASME (American Society of Mechanical Engineering):

Boiler and Pressure Vessel Welding and Brazing Qualifications

Code Section IX

ASME B1.20.1 Pipe Thread General Purpose

ASME B16.9 Factory Made Wrought Buttwelding Fittings

ASME B16.11 Forged Fittings, Socket-Welding and Threaded

ASME B16.5 Pipe Flanges and Flanged Fittings

ASME B16.25 Buttwelding Ends

ASME B31.3 Process Piping

ASME B31.4 Pipeline Transportation System for Liquids Hydrocarbon and

Other Liquids

ASME B31.8 Gas Transmission and Distribution Piping System

PFI (Pipe Fabrication Institute):

ES 3 Fabricating Tolerances

Local Regulation:

Ditjen MIGAS regulation

SNI 13-3499-2002 Perpipaan Pengolahan





3. Definitions and Terms

3.1 Definitions

The following definitions shall apply throughout the specification:

a. The COMPANY shall mean PT. PHE ONWJ (PT. Pertamina Hulu Energi ONWJ)

b. The CONTRACTOR shall mean the primary contractor and any subcontractors

engaged in work covered by COMPANY project.

c. The PURCHASER shall mean PT.PHEONWJ, PT.PHEONWJ affiliation organization,

or PT.PHEONWJ designated representative responsible for processing equipments,

components, material systems or services.

d. The VENDOR shall mean the party which manufactures or supplies the equipment

and services to perform the duties specified by the "CONTRACTOR" / "COMPANY"

FABRICATION.

3.2 Terms

Throughout this document, the words will, may, should, shall and must, when used in

the context of actions by PT. PHE ONWJ or others, have specific meanings.

For purposes of this Specification, the following terms apply:

Will

Used normally in connection with an action by PT. PHE ONWJ rather than by a contractor

or supplier.

May

Used if alternatives are equally acceptable.

Should

Used if a provision is preferred.

Shall

Used if a provision is mandatory by PT. PHE ONWJ.

Must

Used only if a provision is a statutory requirement.

4. Abbreviations

ANSI - American National Standards Institute

API - American Petroleum Institute

ASTM - American Society for Testing and Materials

ASME - American Society of Mechanical Engineers

DITJEN MIGAS - Direktorat Jenderal Minyak dan Gas

DN - Diameter Nominal

NDT - Non Destructive Testing

NPS - Nominal Pipe Size

NPT - Nominal Pipe Thread

OD - Outside Diameter

PHE ONWJ - Pertamina Hulu Energi Offshore North West Java

PQR - Procedure Qualification Test Result

PWHT - Post Weld Heat Treatment

QC - Quality Control

WPS - Welding Procedure Specification





5. Fabrication

5.1 Welding

5.1.1 Qualification of Welding Procedure

Welding Procedure Specification (WPS) and Procedure Qualification Test Result (PQR)

shall be subject to COMPANY approval prior to commencement of fabrication.

Each Welding Procedure Specification (WPS) and Procedure Qualification Test Result

(PQR) shall be certified by DITJEN MIGAS.

All steel pipe welds, except as noted otherwise herein or shown on the drawings, shall be

made with a qualified welding procedure as specified in accordance with Section IX of the

ASME Boiler and Pressure Vessel Code, or ASME B31.3, latest editions, whichever is

applicable to the work involved. Welding procedures shall include preheating of welds and

/ or post-weld heat treating requirements and must be approved by COMPANY prior to

commencement of fabrication.

5.1.2 Qualification for Welding

Welded joints in process and service lines being constructed under the construction code

of ASME B31.3 shall be made with a qualified WPS (Welding Procedure Specification) by

welding operators or welders qualified either in accordance with Section IX of the ASME

Boiler and Pressure Vessel Code, or ASME B31.3, latest editions, whichever is applicable

to the work involved.

Welder and welding operator performance qualifications from other employers are not

acceptable.

5.1.3 Welding Materials

a. Filler Metal

Filler metal shall conform to the requirements of ASME Section IX. A filler metal not

yet incorporated in ASME Section IX, latest edition, may be used with the owners

approval if a procedure qualification test is first successfully made.

b. Backing Rings

The uses of backing rings are not permitted without prior COMPANY approval.

c. Consumable Inserts

The uses of consumable inserts are not permitted without prior COMPANY approval.

5.1.4 Preparation for Welding

a. Cleaning of Grooves

Prior to welding the pipe bevel, all surfaces adjacent thereto shall be thoroughly

cleaned of all scale, rust, grease, oil, or other foreign material.

b. Welding Grooves

The ends of steel pipe and fittings to be erected with butt welded joints shall be

bevelled to form welding grooves in accordance with ASME B31.3, latest edition, and

with ASME B16.25, latest edition.

c. Alignment

Prior to circumferential welding, inside surface shall be aligned and external surface

shall be tapered as required by ASME B31.3 latest edition.





Misalignment shall not exceed that specified in ASME B31.3.

Prior to longitudinal welding, grove welding shall conform to the requirements as

required by ASME B31.3 latest edition.

Branch connection weld and weld spacing shall meet WPS requirements as required

by ASME B31.3 latest edition.

Flange bolt holes shall straddle the establish centerlines, unless another orientation is

required to match the flanged connections on equipment.

Slip-on flanges shall be positioned so that the distance from the face of the flange to

the pipe end shall be equal to the normal pipe wall thickness plus 3 mm 1.5 mm (1/8

in. 1/16 in.). The seal weld shall be applied so that the flange does not need re-

facing.

Welding neck orifice flange shall be the same bores as the pipe to which they are

attached and shall be aligned as accurately as is practicable.

If external force is required to ensure proper line-up only exterior line-up clamps are to

be used. Waivers to this requirement may be granted by COMPANYs on site

representative, but only where it can be demonstrated that the use of line-up clamps is

impractical due to pipe geometry or physical interference.

5.1.5 Welding Requirements

a. Weld Quality

Butt welds shall have full penetration and complete fusion with a minimum of weld

metal protruding on the inside of the pipe per ASME B31.3.

All welds shall be of sound deposit with a straight line of fusion.

The finished weld contour shall be uniform, with the toe or edge of the weld merging

smoothly into the base material. Butt welds shall have a slight reinforcement built up

gradually from the toe or edge toward the center of the weld per ASME B31.3 latest

edition. Fillet welds may be slightly concave on the finished surface.

No welding shall be done if there is impingement on the weld area of rain, snow, sleet,

or excessive wind, or if the weld area is frosted or wet.

The welding sequence and procedure and any heat treatment for a welding end valve

shall be such as to preserve the seat tightness of the valve.

Radiography shall be required as indicated in Piping Material Specifications.

Normally, ultrasonic testing, in lieu of radiography, is acceptable only where

radiography is not practicable.

b. Cleaning of Welds

All slag or flux remaining on the bead of a weld shall be completely removed before

laying down the next successive bead and the completion of the weld.

c. Defects in Welds

If any cracks or blow holes occur on the surface of any welding bead, they shall be

chipped out with a round nosed chisel to remove the defect and present such a

surface that complete fusion may be obtained with the next successive welding bead.





Sizes of fillet welds for attaching socket welding components and slip-on flanges shall

be not less than shown in B31.3, and;

1. The weld shall be at least a two pass weld.

2. The size of the fillet weld used in attaching the hub of a slip-on flange to the pipe

shall not be less than 6 mm (1/4 in.).

3. In socket welding construction, it is necessary to have engagement between the

pipe and the socket. Before a socket weld is started, the gap at the bottom of the

socket between pipe and valve, lifting, or flange shall be 1.5 mm to 6 mm (1/16 in.

to in.).

d. Identification of Code Welders

Each welder employed for shop or field welding of pipe joints, to be fabricated and

erected according to the Code authorities, shall be assigned an identifying number

and a list shall be compiled of such welders with their respective numbers. This list

must be maintained accurately with deletions and additions reported promptly. Upon

completing a joint, the welder shall write his identifying number and the last two digits

of the year in which the work was performed using colored crayons around the pipe

within 6 inches of the weld.

5.2 Cutting

It is preferred that the ends of pipe, as well as the edges of plate that is to be formed into

pipe, is shaped by machine. Other methods of shaping may be employed, provided that a

reasonably smooth and clean surface is attained. No flame cutting of quenched and

tempered carbon steels (for example, ASTM A672 Classes 50, 51, 52 and 53), high-

strength micro-alloyed steels (for example, ASTM A714, API 5L Grade 65 or 70) shall be

done unless the flame-cut surface is machined or ground to sound metal. At least 1/16 in.

(1.5 mm) of metal shall be removed.

Arc-cut and flame cut edges of 1 Cr-1/2Mo and higher alloy materials shall be examined

for cracks after machining or grinding by the dye penetrant or magnetic particle method.

All cracks shall be removed by machining or grinding.

In case of gas cutting, cutting surface shall be ground off to remove any edge and

roughness and be made flush and smooth so as not to harm welding quality. In the case

of automatic or semiautomatic gas cutting, the cut edge may be bevelled without such

grinding off.

In case of gas cutting, hole cutting by gas, all cut out material inside pipe shall be

completely removed.

Abrasive disc used for cutting or grinding of austenitic stainless steels or other high Cr-Ni

Steels shall not be used for carbon steels or vice versa.

Plasma jet cutting may be applied for stainless steel, etc.

5.3 Preheating

Preheat shall be in accordance with ASME B31.3, Table 330.1.1 and 331.1.1. Normally it

is only use to remove moisture from joint.

Preheat temperature shall be checked by use of temperature indicating crayons,

thermocouple pyrometers or other suitable means to ensure that the temperature specified

in the WPS is obtained prior to and maintained during welding. Preheat shall be uniform

and involve the entire weld preparation area. The preheat zone shall extend at least 25

mm (1 in) beyond each edge of the weld.


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5.4 Heat Treatment

Post weld heat treatment (PWHT) or stress-relieving shall be in accordance with ASME

B31.3, Table 330.1.1 and 331.1.1, for carbon steel with a nominal thickness of more than

3/4 inch.

After heat treatment, the metal shall be cooled down with the cooling rate according to

table 331.1.1 ASME B31.3.

5.4.1 Heat Treatment Requirements

Specific applications for which heat treatment is required shall be identified by the

engineering design.

If stress relief heat treatment of austenitic steels is specified by the engineering design,

welds shall be heated to temperature in range of 900C - 950C (1650F - 1740F) and

held for 1 hour per 25 mm (1 in) of thickness. Minimum soaking period shall be 1 hour.

Low melting point metals, such as aluminium, lead, tin, copper, zinc, cadmium, and

mercury, and their alloys, shall not be permitted to contact surfaces that will undergo hot

forming, welding, or post weld heat treatment.

5.4.2 Heating and Cooling

Should heat treatment be necessary during fabrication of other alloys covered by this

Specification, full details of soaking temperature and time, along with applicable heating

and cooling rates will be provided by engineering design.

If practical, thermocouples shall be attached to spool pieces at minimum of six equally

spaced locations, adjacent to welds, prior to heat treatment.

Procedures for attachment of thermocouples by capacitor discharge welding shall be

subject to COMPANY approval. Use of this technique shall be carefully monitored.

5.4.3 Hardness tests

Additional requirement for hardness testing may be specified by engineering design.

5.4.4 Specific requirements

If local heat treatment is applied, weld shall be sufficiently heated and insulated to ensure

that (for a pipe of DN (NPS) D and wall thickness t):

Specified heat treatment temperature is achieved at weld.

Within distance of 1.8 Dt on both sides of the weld, temperature of not less than half of

specified heat treatment temperature is attained.

In the case of branch attachments, temperature gradient shall be such that length of

material from each crotch heated to temperature equalling half heat treatment temperature

shall be 1.8 Dt (where D and t are the nominal diameter and thickness of the main pipe

and branch as appropriate).

D is expressed as DN (NPS), tis expressed in mm (in), and temperature is expressed in

C. (See Figure 1)






5.5 Bending and Forming

5.5.1 General

Pipe may be bent and components may be formed by any hot or cold method which is

suitable for the material, the fluid service, and the severity of the bending or forming

process. The finished surface shall be free of cracks and substantially free from buckling.

Thickness after bending or forming shall be not less than that required by the design.

a. Material

The pipe used for bends shall be SEAMLESS, API-5LB, ASTM A106-B or A53-B

made by the open hearth or electric furnace process. Cold worked pipe is prohibited.

b. Forming

Pipe bends shall be formed while cold. Care shall be taken during forming to ensure

that the cross section of the pipe is preserved within the limitations imposed by the

applicable code.

The pipe diameter at the bevelled ends of the completed bend shall not exceed the

diameter of the pipe from which the bend was formed.

For cold formed bends which incorporate internal pressurization of the pipe during

bending, the finished bend diameter, other than at the bevelled ends, shall not exceed

the limits shown in attached Tables 1, 2 and 3.

c. Bend Radius

Pipe bends shall have a minimum bend radius equal to five (5) times the nominal

diameter on pipe sizes thru 14" (R=5D), and eight (8) times the nominal diameter of

the pipe on NPS 16" and larger. (R=8D).

d. Included Angle

The included angle of the pipe bend shall be as described on the applicable design

drawing. Should a conflict arise between this document and the bend drawing, the

drawing shall govern.

e. Beveled Bend

Both ends of each bend shall be bevelled for welding unless otherwise noted. Both

ends of each bend shall be protected with metallic end caps.

f. Thinning

The wall thickness of a finished bend shall be no less than 92% of the wall thickness

of the pipe from which the bend was formed.

g. Tangents

All finished bends shall have a minimum straight length from bend tangents to

bevelled ends of 2-0" unless otherwise stipulated on the design drawings, in which

case the drawing shall govern.

h. Heat Treatment

All bends with wall thickness of 0.75" or more shall be heat treated.

Heat treatment may be accomplished by any acceptable method used in the industry

which provides the required metal temperature, metal temperature uniformity, and

temperature control such as an enclosed furnace, electric resistance, or electric

induction.





Cooling may be accomplished in a furnace, in air, with the aid of local thermal control,

with the application of heat or insulation, or in any other manner required to achieve

the desired cooling rate.

5.5.2 Platform Piping Bend

a. Code of Practice

Pipe bends formed for use in a platform piping system shall meet the requirements of

the latest edition of the American National Standards Institute code for Chemical Plant

and Petroleum Refinery Piping (ANSI B31.3).

b. Material

Platform piping bends may be formed only from materials which achieve their

minimum yield strength from chemical composition.

These bends may be fabricated from materials shown in attached Tables 1, 2 and 3.

The use of materials of yield strengths other than specified is prohibited.

c. Out of Roundness

Flattening of a bend, as measured by the difference between the maximum and the

minimum diameter at any cross section, shall not exceed 8% and 3% of the nominal

outside diameter for internal and external pressure respectively.

d. Taper Boring

Pipe bends will be inside taper bored at the bevelled end where required by the design

drawings.

e. Maximum Diameter

Cold formed pipe bends shall have a maximum outside diameter after forming per the

limits shown in Tables 1, 2 and 3.

f. Mill Test Certificates

Mill test certificates shall be provided for all materials used in the forming of pipe

bends.

g. Bending Temperature

Cold bending of ferrites materials shall be done at a temperature below the

transformation range.

Hot bending shall be done at a temperature above the transformation range and in

any case within a temperature range consistent with the material and the intended

service.

h. Corrugated and Other Bend

Fabricated miter (segmented) bends are not generally permitted.

Subject to agreement of COMPANY, limited use of mitered bends in accordance with

attached Figure 2 may be proposed.

Cut and shut design shall not be used.

i. Forming

The temperature range for forming shall be consistent with material, intended service,

and specified heat treatment.





j. Required Heat Treatment

Heat treatment shall be performed in accordance with ASME B31.3 latest edition.

k. Hot Bending and Forming

After hot bending and forming, heat treatment is required for P-Nos. 3, 4, 5, 6, and

10A materials in all thicknesses. Durations and temperatures shall be in accordance

with ASME B31.3 latest edition.

l. Cold Bending and Forming

For any conditions after cold bending and forming, heat treatment is required as

described in ASME B31.3 latest edition.

5.5.3 Inspection

The outside diameter (O.D.) of the finished bend shall be checked at eight points equally

spaced throughout the curved portion of the bend to verify compliance with this

specification in accordance with Contractors QC plan for inspection of pipe bends.

The finished bend shall be ultra sonically tested to verify compliance with the minimum

wall thickness requirements of this specification.

The finished bend shall be checked for compliance with all requirements of this

specification.

Inspection shall be in accordance with ASME B 31.3

6. Installation

6.1 Alignment

6.1.1 Piping Distortions

Application of heat for correction of minor distortions shall only be undertaken with

COMPANY approval. Misalignment shall not exceed that specified in B31.3.

For application other than B31.3, CONTRACTOR shall consult it to COMPANY for

approval.

6.1.2 Flanged Joints

Before bolting up, flange faces shall be aligned to the design plane within 1 mm in 200 mm

(116 in./ft) measured across any diameter; flange bolt holes shall be aligned within 3 mm

(18 in.) maximum offset.

6.2 Erection

6.2.1 Butt Welds

Butt welding of pipe and fittings shall be bevelled for either 30

o

or 37-1/2

o

. (The 30

o

bevel

is preferred.) It will be permissible to weld 30

o

bevel to 37-1/2

o

bevel.

Weld reinforcement shall be applied so that the weld shall have a smooth contour which

will merge gradually with the surfaces of adjacent pipe and fittings.

If external force is required to ensure proper line-up only exterior line-up clamps are to be

used. Waivers to this requirement may be granted by COMPANYs on site representative,

but only where it can be demonstrated that the use of line-up clamps is impractical due to

pipe geometry or physical interference.







Butt welding 90

o

elbows shall be long radius elbows unless otherwise approved by

COMPANY for use in restricted space.

Short radius elbows may be used with COMPANY approval if needed, but they shall be

derated to 80% of the calculated allowable working pressure if they are subjected to

pulsation. Miter elbows or bends shall not be used.

For a reducing fitting or reducer (large end and small end) of different weight designations

(schedule or weight), the fitting or reducer shall be of the higher weight designation.

6.2.2 Flange Connections and Bolt Joints

Flanges shall be used only for equipment nozzle flange connections, valve flange

connections, locations shown on the drawings, and lines specified herein. All slip-on

flanges require prior written COMPANY approval for use, and if approved are to be welded

on front and back per latest issue of ASME B31.3 requirements.

Weld neck flanges per ASME B16.5 shall be used for all hydrocarbons piping of 2" pipe

size and larger unless otherwise approved by the COMPANY. The following exceptions

are permissible:

a. Flanges per API Specification 6A may be used when needed to connect to valves or

for special lines such as well flow lines.

b. Special bolted connectors such as "Grayloc" or "Taperlok" may be used with

COMPANY approval, when appreciable savings of space and/or weight are of an

advantage.

c. Grooved connectors such as "Victaulic" may be used on drains.

d. Permanent connectors such as "Pyplok" may be used with approval for pipe sizes

through 1 1/2", when appreciable savings in cost to the COMPANY, and/or fabrication

time are of an advantage.

The wall thickness and the bore of the hubs of weld neck flanges shall match the pipe

when possible. If the wall thickness of the flange or pipe exceeds the thickness of the

other by more than 1/16", the thicker item shall be bored or trimmed at an angle of not

more than 30

o

to correct the difference to not more than 1/16". When the flange is thicker,

the required modification shall be shown on the flange description in the material list.

When the pipe is thicker, the drawing shall indicate that boring or trimming by the fab-

ricator is required.

The type of flanges, gaskets and stud bolts for each service and pressure class is

specified in ASME B16.5 and individual piping specification.

Flanges of ASME pressure class 400 shall not be used unless approved by COMPANY.

Flanges to mate with flat faced flanges on pumps or other machinery shall be flat faced. It

is satisfactory to machine the flat face from raised face flanges for this purpose. Full faced

gaskets shall be used with flat face flanges.

Reducing flanges shall not be used if space is available for pipe reducers or reducing

elbows.

Stud bolt lengths for flange systems shall be in accordance with ASME B16.5, when

applicable. For other cases, the minimum length shall provide for the last thread in each

nut to be complete engaged. The maximum length shall not cause the stud to extend

more than approximately 1/4" beyond the nut or three or fewer threads on each end

unless bolt tensioning equipment is used. Excessive torque shall not be applied when

installing.











Flanges mating to 125# CI flanges shall be flat face.

Flanges for ASME Class 900 and lower shall be raised face. Flanges for ASME Class

1500 and higher shall be ring-joint type.

Bleed rings shall be steel, drilled and tapped 3/4" NPT.

New gasket shall be used in the final assembly of all joints opened for testing or cleaning

of piping system.

6.2.3 Socket Weld Connections

Where socket weld valves or fittings are used, the pipe shall be properly spaced in the

socket that no stresses will be imparted to the weld due to "bottoming" of the pipe in the

socket.

Fittings and valves with socket weld ends shall be used only on socket weld piping

systems.

6.2.4 Screwed Thread Connections

Screwed threads shall be clean cut with no burrs or stripping and shall be tapered

according to ASME B1.20.1. Dies shall be new, sharp, and properly designed for the

piping material. Immediately before erecting the piping, all threads of pipe and fittings shall

be thoroughly cleaned of cuttings, dirt, oil, or other foreign matter. The male threads shall

be coated with thread sealant of a type compatible with both the process fluids and the

fitting metallurgy, and the piping made up sufficiently for the threads to seize.

"Thread-O-lets" shall be used for thermo wells, pressure taps, pressure gauges, sample

taps, drains and vents sized 1 1/2" and smaller on runs sized 2" and larger. Screwed tees

shall be used on runs size 1 1/2" and smaller, except for socket weld construction.

Screwed "Elbolets" shall be restricted to connections for thermo wells. Elbolets may be

used for drains and vents without COMPANY approval. They shall not be used for branch

pressure piping.

Threaded nipples shall be long enough to be held with a pipe wrench when fittings are in

place on each end. Close-taper (all-thread) nipples shall not be used. Nipples used with

socket welding fittings shall have plain ends.

Street elbows shall not be used. Threaded bushings shall not be used on process piping.

Hex bushings (but not flush bushings) may be used on air lines for connecting instrument

valves and tubing fittings.

Forged steel unions shall be forged from approved materials and have integral ground

seats.

Pipe thread sealant shall be Teflon Tape (max. 450

o

F).

6.2.5 Seal Welding

Where seal welding is called for hereinafter, or on the drawings, screwed steel fittings

shall be thoroughly cleaned and made up dry, using not thread sealant. After being made

tight, a seal bead shall be welded around each joint.

When seal welding of threaded connections is required, the following shall apply in

addition to paragraph 328.5.3 and 335.3.2 of B31.3:

a. The seal weld shall be at least a two-pass weld covering all exposed threads.









b. Valve and union ends shall be welded by an electric arc welding process to minimize

distortion. Valves shall be closed during welding. Unless otherwise approved by

COMPANY, non metallic seats shall be removed during welding.

6.2.6 Branch Connections

Branch connections shall be made in accordance with branch connection as described in

PHEONWJ-M-SPE-0025 Piping Material Specification.

6.2.7 Expanded Joints and Special Joints

Expanded joints and special joints shall be installed and assembled in accordance with the

manufacturers instructions, as modified by the engineering design. Care shall be taken to

ensure adequate engagement of joint members.

6.2.8 Packed Joints

Where a packed joint is used to absorb thermal expansion, proper clearance shall be

provided at the bottom of the socket to permit this movement.

6.2.9 Taper-Threaded Joints

Threaded joints that leak during a pressure test shall be seal welded without COMPANY

approval. Approval to seal weld a threaded joint shall not be given where the threaded

joints has been provided for maintenance or operating reasons. In no event shall a

threaded joint be welded without complete removal of pipe thread lubricant.

Threaded joints shall be made up with a lubricant suited for the specific service. The

following, or their equivalents, are recommended as indicated:

Service

Service air and Hydrocarbon lines

bellow 260

o

C (500

o

F) and 40 MPa

(6000 psig)

Recommended Lubricant

Thread sealant paste or teflon tape

bellow 240

o

C (400

o

F)

Hydrocarbon lines above 260

o

C

(500

o

F)

Thread sealant paste

Instrument air, lube, seal, and control

oil piping

Teflon paste

Water and steam lines bellow 260

o

C

(500

o

F)

Federal process thread guard

Compound or teflon tape bellow

205

o

C (400

o

F)

Water and steam lines from 260

o

C

(500

o

F) to 540

o

C (1000

o

F)

Thread sealant paste

HF acid bellow 205

o

C (400

o

F) Teflon tape or paste

Oxygen Teflon tape (do not use flammable

material)






7. Testing

7.1 General

Pressure and leak tests shall be performed in accordance with PHEONWJ-M-SPE-0256

General Piping Systems Field Test Specification and ASME B 31.3 requirements.

Testing procedures, schedules and Hydro test - Pneumatic Test Mechanical Flow

Diagrams shall be submitted for COMPANY approval during the design phase.

These procedures and documents shall be specifically related to each project.

The test pressure shall be maintained for an adequate time to determine small seepage

type leaks and to permit a thorough inspection. COMPANY requires minimum one (1)

hour test duration.

Manufacturers written approval as to the maximum test pressure that can be applied to its

valve in the closed position shall be obtained if the valve is to be tested in the closed

position. Prior written approval from COMPANY shall be obtained before testing with

valves in closed position is carried out.

All material shall be suitable for the hydrostatic test temperatures. Special consideration

shall be given to the possibility of brittle fracture.

Material such as gaskets, bolting, etc., damaged during test shall be replaced.

New gaskets shall be used for piping assembly after hydro test.

Packing shall be replaced in equipment such as valves when leaks cannot be stopped by

normal tightening of the packing glands.

7.2 Pressure Testing

Shop and field pressure tests shall be performed in accordance with B31.3, except that

pneumatic testing shall be subject to COMPANY approval. All pneumatic testing shall be

met the requirements of paragraph 345.5 of B31.3. The contractor shall submit all testing

procedures and schedules for approval. Pressure gauges and recorders used in the test

shall have been calibrated within the previous 30 days by internal institution, and shall

have valid calibration certificate by external authorize Calibration Institution, for max 12

(twelve) months period. Care should be taken to remove all water from piping to be

operated below 0

o

C (32

o

F). This includes relief valves, control valves, and any other

component that has been tested in a shop.

Hydrotest detail shall be detailed in procedure proposed by CONTRACTOR

Regardless of design temperature, all piping system shall be tested in accordance with

B31.3. This includes Category D Fluid Service and those systems designed at 100 kPa

gage (15 psig) or less (unless open to atmosphere)

Relief or blow down systems shall be tested in accordance with B31.3. However, in no

case shall be less than 100 kPa gage (15 psig). Relief valves and rupture discs shall not

be included in the test.

7.3 Cleaning of Piping

All piping systems shall be thoroughly cleaned and flushed with clean fresh water or air

prior to installation. Openings in the piping, where foreign material may enter during

construction, shall be covered.










All pipe spools shall be free of sand, weld slag, or other foreign material before being

installed. COMPANYs Representative shall have the right to stop the work on any pipe

spool until it and the pipe to which it is to be connected is free of such material.

The following are some general considerations that may be evaluated in determining the

need for cleaning of piping:

a. Requirements of the service, including possible contaminants and corrosion products

during fabrication, assembly, storage, erection, and testing.

b. For low temperature service, removal of moisture, oil, grease, and other contaminants

to prevent sticking of valves or blockage of piping and small cavities.

c. For strong oxidizer fluid service (e.g., oxygen or fluorine), special cleaning and

inspection. Reference may be made to the Compressed Gas Associations Pamphlet

G-4.1 Cleaning Equipment for Oxygen Service.

8. Fabrication, Erection, Inspection, and Testing of Non Metallic

Piping

The fabrication, erection, inspection, and testing of non metallic piping shall be in accordance

with ASME B31.3, except that the following are not acceptable:

a. Bonding performance qualification testing results from another employer.

b. Branch connection made by inserting the branch pipe into a hole in the run pipe.

The extent of examination of non metallic piping shall meet the requirements of Paragraph

A341 of ASME B31.3.

The acceptance criteria for bonds are shown in table A341.3.2 of ASME B31.3.



PT. PHE ONWJ Piping Fabrication, Installation And Testing Specification



Table 1 Available Material Selections for Piping Bends (ANSI B31.3) Piping Specification Class "A" ANSI 150#

NOMINAL PIPE

DIAMETER

PIPE BEND

RADIUS

DESIGN

PRESSURE

DESIGN

TEMPERATURE

MAXIMUM

ALLOWABLE PIPE

DIA. AFTER

FORMING

MATERIAL TYPE NOMINAL WALL

THICKNESS (See

note 1)

(OD-inches) (inches) (psig) (

o

F) (inches) (inches)

6

(6.625)

30.00 285 100 6.800 API-5L GR.B

ASTM A-53 GR.B

ASTM A106 GR.B

0.280

0.280

0.280

8

(8.625)

40.00 285 100 8.800 API-5L GR.B

ASTM A-53 GR.B

ASTM A106 GR.B

0.322

0.322

0.322

10

(10.750)

50.00 285 100 11.00 API-5L GR.B

ASTM A-53 GR.B

ASTM A106 GR.B

0.365

0.365

0.365

12

(12.750)

60.00 285 100 13.05 API-5L GR.B

ASTM A-53 GR.B

ASTM A106 GR.B

0.375

0.375

0.375

14

(14.00)

70.00 285 100 14.35 API-5L GR.B

ASTM A-53 GR.B

ASTM A106 GR.B

0.375

0.375

0.375

16

(16.00)

128.00 285 100 16.40 API-5L GR.B

ASTM A-53 GR.B

ASTM A106 GR.B

0.280

0.280

0.280

24

(24.00)

192.00 285 100 24.6 API-5L GR.B

ASTM A-53 GR.B

ASTM A106 GR.B

0.322

0.322

0.322

Notes:

1. Wall thickness calculations take the following into consideration:

** 12.5% loss in thickness due to pipe manufacturing mill tolerance

** 8% loss in thickness incurred during bending

** Maximum allowable pipe diameter

2. Approval for the use of materials having wall thicknesses greater than specified in the table must be approved in writing by COMPANY.





Table 2 Available Material Selections for Piping Bends (ANSI B31.3) Piping Specification Class "B" ANSI 300#

NOMINAL PIPE

DIAMETER

PIPE BEND

RADIUS

DESIGN

PRESSURE

DESIGN

TEMPERATURE

MAXIMUM

ALLOWABLE PIPE

DIA. AFTER

FORMING


THICKNESS (See

note 1)


o


6

(6.625)

30.00 740 100 6.800 API-5L GR.B

ASTM A-53 GR.B

ASTM A106 GR.B

0.280

0.280

0.280

8

(8.625)

40.00 740 100 8.800 API-5L GR.B

ASTM A-53 GR.B

ASTM A106 GR.B

0.322

0.322

0.322

10

(10.750)

50.00 740 100 11.00 API-5L GR.B

ASTM A-53 GR.B

ASTM A106 GR.B

0.365

0.365

0.365

12

(12.750)

60.00 740 100 13.05 API-5L GR.B

ASTM A-53 GR.B

ASTM A106 GR.B

0.375

0.375

0.375

14

(14.00)

70.00 740 100 14.35 API-5L GR.B

ASTM A-53 GR.B

ASTM A106 GR.B

0.375

0.375

0.375

16

(16.00)

128.00 740 100 16.40 API-5L GR.B

ASTM A-53 GR.B

ASTM A106 GR.B

0.375

0.375

0.375

24

(24.00)

192.00 740 100 24.6 API-5L GR.B

ASTM A-53 GR.B

ASTM A106 GR.B

0.688

0.688

0.688

Notes:





2. Approval for the use of materials having wall thicknesses greater than specified in the table must be approved in writing by COMPANY





Table 3 Available Material Selections for Piping Bends (ANSI B31.3) Piping Specification Class "D" ANSI 600#

NOMINAL PIPE

DIAMETER

PIPE BEND

RADIUS

DESIGN

PRESSURE

DESIGN

TEMPERATURE

MAXIMUM

ALLOWABLE PIPE

DIA. AFTER

FORMING


THICKNESS (See

note 1)


o


6

(6.625)

30.00 1480 100 6.800 API-5L GR.B

ASTM A-53 GR.B

ASTM A106 GR.B

0.432

0.432

0.432

8

(8.625)

40.00 1480 100 8.800 API-5L GR.B

ASTM A-53 GR.B

ASTM A106 GR.B

0.406

0.406

0.406

10

(10.750)

50.00 1480 100 11.00 API-5L GR.B

ASTM A-53 GR.B

ASTM A106 GR.B

0.500

0.500

0.500

12

(12.750)

60.00 1480 100 13.05 API-5L GR.B

ASTM A-53 GR.B

ASTM A106 GR.B

0.687

0.687

0.687

14

(14.00)

70.00 1480 100 14.35 API-5L GR.B

ASTM A-53 GR.B

ASTM A106 GR.B

0.750

0.750

0.750

16

(16.00)

128.00 1480 100 16.40 API-5L GR.B

ASTM A-53 GR.B

ASTM A106 GR.B

0.843

0.843

0.843

24

(24.00)

192.00 1480 100 24.6 ASTM A-53 GR.B

ASTM A106 GR.B

1.218

1.218

Notes:





2. Approval for the use of materials having wall thicknesses greater than specified in the table must be approved in writing by COMPANY





1 1

1.8 D t

1.8 D t

2 2

SHADED AREAS TO BE HEAT TREATED

D NOMINAL O.D OF MAIN PIPE

D NOMINAL O.D OF BRANCH PIPE

t THICKNESS OF MAIN PIPE

t THICKNESS OF BRANCH PIPE

1

2

1

2

Figure 1 Local heat treatment for branch connections





90

TYPE A

60

TYPE B

30

TYPE C

ALL PIPE SIZES

THESE

ANGLES

SHALL BE

EQUAL

BACK WELD

TO BE

APPLIED ON

ALL JOINTS

L

L

60

MINIMUM

45 MIN.

LONGITUDINAL SEAMS TO BE

STAGGERED BY 90 DEGREES

DIMENSION L REFER TO

PARAGRAPH 328.5.7

:

BUTT

JOINT

LAP OR SLEEVE

JOINTS SHALL NOT BE

USED WITHOUT THE

APPROVAL OF BP.

L

L

WELD NECK

FLANGE

SLIP-ON FLANGE

(HUB OR PLATE TYPE)

SECTION AT THROAT

OF BEND

OVER 30 DEGREES

1 SEGMENT

DN 350 (NPS 14) & OVER

OVER 60 DEGREES

2 SEGMENTS

DN 350 (NPS 14) & OVER

Figure 2 Segmental bending

LAP OR SLEEVE JOINTS SHALL NO BE

USED WITHOUT THE COMPANY

APPROVAL


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