PHEONWJ-M-SPE-0024~1 General Piping Specification

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PT. PHE ONWJ General Piping Design Specification

PHEONWJ-M-SPE-0024, Rev 1 Page 2

Paper Copies are Uncontrolled

Revision Log Register

Revisions had been performed on following pages:

Page Date Revision

All 16-Jul- 2012 Change the standard format document

Change Document number to PHEONWJ-M-SPE-0024 was

PHEONWJ-X-SPE-0004

Change PHE ONWJ Ltd become PT. PHE ONWJ

Update Header and Footer

Update Reference document with new document Number

14 of 24 16-Jul- 2012 4.11 Flange. The last bullet shall be read as follow:

Jackscrews shall be provided for all flanges joint, when spacer or

blank installed. In special case also to be provided on ring type joint

flanges if required for ease of piping or equipment removal.





Table of Contents

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

Table of Contents ............................................................................................................................... 3

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

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

2.1 Company Specifications ........................................................................................................ 4

2.2 International Standard and Codes ......................................................................................... 4

2.3 Order of Precedence ............................................................................................................. 5

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

4. Piping Design ................................................................................................................................ 6

4.1 General Arrangement ............................................................................................................ 6

4.2 Piping Layout ......................................................................................................................... 8

4.3 Relief Systems ..................................................................................................................... 10

4.4 Provision for Expansion and Flexibility ................................................................................ 10

4.5 Pipe Support and Anchors ................................................................................................... 10

4.6 Joints and Connection ......................................................................................................... 11

4.7 Branch Connections ............................................................................................................ 11

4.8 Line and Connection Sizes .................................................................................................. 12

4.9 Change in Direction ............................................................................................................. 12

4.10 Reducers.............................................................................................................................. 12

4.11 Flanges ................................................................................................................................ 12

4.12 Plugs .................................................................................................................................... 13

4.13 Valves .................................................................................................................................. 13

4.14 Spec Breaks......................................................................................................................... 14

5. Equipment Piping ........................................................................................................................ 14

5.1 Pump Piping Installation ...................................................................................................... 14

5.2 Vessel Piping ....................................................................................................................... 15

5.3 Gas Compressor Piping ....................................................................................................... 15

5.4 Shell and Tube Heat Exchangers ........................................................................................ 16

5.5 Diesel Engine ....................................................................................................................... 16

5.6 Vents and Drains ................................................................................................................. 16

5.7 Corrosion Monitoring ........................................................................................................... 17

5.8 Chemical Injection Points .................................................................................................... 17

6. Requirements for Individual Piping Systems ............................................................................... 17

6.1 Requirements for Process Piping Systems ......................................................................... 17

6.2 Requirements for Utility Systems......................................................................................... 18

6.3 Stress Analysis .................................................................................................................... 18

7. Materials and Applications Instructions ....................................................................................... 18

7.1 Pressure and Temperature Ranges .................................................................................... 18

7.2 Steel Pipe............................................................................................................................. 18

7.3 Socket Weld vs Threaded .................................................................................................... 19

7.4 Heat Treatment .................................................................................................................... 19

7.5 Sour Service Materials ......................................................................................................... 19

7.6 Painting ................................................................................................................................ 19

7.7 Tubing .................................................................................................................................. 19

8. Quality Assurance and Quality Control ....................................................................................... 19

9. Identification and Marking ........................................................................................................... 20

10. Identification System ................................................................................................................... 20

Table 1 Minimum Isolation Requirement ........................................................................................ 21





1. Scope

This specification defines the minimum general requirements and material specifications for the

design of Process and Utility Piping Systems of offshore and onshore facility to be installed in

Indonesia, by PT. PHE ONWJ, hereafter referred to as COMPANY.

It does not cover fabrication, welding, inspection and testing requirements, which is covered by the

PHEONWJ-M-SPE-0021 Piping Fabrication, Installation and Testing Specification. Risers and

pipelines are excluded unless where specifically stated.

The CONTRACTOR shall ensure that all equipment and services supplied meet the requirements

of this specification, and the codes, standards and specifications nominated herein, whether the

equipment or services are supplied by the CONTRACTOR directly or by a VENDOR, sub vendor

or subcontractor.

Where VENDOR is supplying equipment and or services to PURCHASER, VENDOR shall ensure

that all equipment and services supplied by the VENDOR meet the requirements of this

specification, and the codes, standards and specifications nominated herein, whether the

equipment or services are supplied by the VENDOR directly or a sub vendor.

The piping systems shall be designed to have a design life of 20 years

2. References

The current edition, at the date of contract award, of the following codes, standards, and

specifications form an integral part of this specification.

2.1 Company Specifications

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

PHEONWJ-L-PRC-0103 Guideline for Design and Installation of Corrosion Monitoring

Facilities

PHEONWJ-O-PRC-0025 Guidance on Engineering Method, Standard Isolation

PHEONWJ-M-SPE-0021 Piping Fabrication, Installation and Testing Specification

PHEONWJ-M-SPE-0022 Pipe Stress Analysis Specification

PHEONWJ-M-SPE-0023 Valve Specification

PHEONWJ-M-SPE-0025 Piping Material Specification

2.2 International Standard and Codes

American Society of Mechanical Engineers (ASME)

B31.3 Process Piping - ASME Code for Pressure Piping

B1.20.1 Pipe Threads, General Purpose (Inch)

B1.1 Unified Inch Screw Threads (UN and UNR Thread Form)

B16.5 Pipe Flanges and Flanged Fittings

B16.9 Factory - Made Wrought Steel Buttwelding Fittings

B16.10 Face - to - Face and End to - End Dimensions of Ferrous Valves

B16.11 Forged Steel Fittings, Socket Welding and Threaded

B16.20 Metallic Gaskets for Pipe Flange. Ring Joint, Spiral Wound and Jacketed.

B16.21 Nonmetallic Flat Gaskets for Pipe Flanges

B16.34 Valves - Flanged and Buttwelding End Steel, Nickel Alloy, and other Special Alloys

B16.36 Steel Orifice Flanges

B16.47 Large Diameter Steel Flanges

B18.2.1 Square and Hex Bolts and Screws Inch Series Including Hex Cap Screws and Lag

Screws

B18.2.2 Square and Hex Nuts

B36.10 Welded and Seamless Wrought Steel Pipe

B36.19 Stainless Steel Pipe





Manufacturers Standardization Society of the Valve and Fittings Industry, Inc.

SP-6 Standard Finishes on Contact Faces of Pipe flanges and Connecting-End Flanges

of Valves and Fittings

SP-25 Standard Marking System for Valves, Fittings, Flanges and Unions

SP-82 Sect. 4D Valve Pressure Testing Methods.

American Petroleum Institute (API)

RP 14 E Offshore Production Platform Piping Systems

RP 520 Sizing, Selection and Installation of Pressure-Relieving Devices in Refineries

RP 520 D Design and Installation of Pressure Relieving System in Refineries

RP 521 Guide to Pressure-Relieving and Depressurizing Systems

SPEC 5 L Specification for Line Pipe

SPEC 6D Specification for Pipeline Valves (Steel Gate, Plug, Ball, Check Valves)

STD 594 Water and Wafer-Lug Check Valves

STD 598 Valve Inspection and Testing

STD 600 Steel Gate Valves, Flanged or Butt weld Ends

STD 601 Metallic Gaskets for Raised Face Pipe Flanges and Flanged Connections (Double-

Jacketed, Corrugated and Spiral Wound)

STD 602 Compact Carbon Steel Gate Valves

STD 607 Fire Test for Soft-Seated Quarter-Turn Valves

STD 609 Lug and Wafer-Type Butterfly Valves

STD 6FA Fire Test for Valves

EEMUA No 144 90/10 Copper Nickel Alloy Piping for Offshore Applications -

Specification: Tubes Seamless and Welded

EEMUA No 146 90/10 Copper Nickel Alloy Piping for Offshore Applications -

Specification: Fittings

BS EN 10204 Metallic Products Types of Inspection Documents

2.3 Order of Precedence

The following order of priority shall apply to the various documents, codes and standards called up

with the Enquiry or Purchase Order:

- Enquiry / Purchase Order

- This Specification / Scope of Work

- Datasheets

- Other Project specifications

- International Codes and Standards

- Other related documents

Compliance with the statutory requirements of the Indonesian Authorities is Mandatory.

3. Definition of Terms

The following terms as used in this specification assume the meanings given below:

COMPANY PT. PHE ONWJ

CONTRACTOR The company or consortium which is awarded the main EPCI contract

for the project

PURCHASER PT. PHE ONWJ, PT. PHE ONWJ affiliation organization or PT. PHE

ONWJ designated representative responsible for processing equipment,

components, material systems or services.

VENDOR The Company on which the order or contract for supply of the goods or

services is placed.





4. Piping Design

4.1 General Arrangement

All pipe fittings and valves shall conform to the Standard Specifications for the service specified, as

indicated on the Piping Drawings, Isometrics, Pipe Fabrication Spool Sheets, Line Schedules and

these specifications. Line sizes DN 30, 65, 90 & 125 (NPS 1-1/4, 2-1/2, 3-1/2 and 5) shall not be

used, except with specific written COMPANY approval. When these sizes are a part of purchased

equipment, the connecting pipe shall be increased or decreased to a standard size. Pipes DN 15

(NPS 1/2) and smaller shall not be used. Stainless steel tubing with formed bends and tubing

fittings shall be used when small pipe sizes are necessary.

Temporary strainers shall be installed in suction lines to all major equipment (compressors, pumps,

etc.) for removal of dirt, trash and other foreign material and should ensure that the debris is

completely removed from the system when the strainer is cleaned, and be cleaned easily without

disturbing the main pipe work. Pipe work shall be designed to incorporate the strainer and no pipe

springing shall be allowed for retroactive installation. A suitable spacer shall be provided, when

specified by COMPANY, for use on removal of the strainer.

If not specific state by VENDOR, the standard mesh size for liquid is 40 and 120 for Gas. But

again, VENDOR requirement is govern if any.

Pressure tapping shall be provided for measuring pressure drop at all permanent and temporary

strainers.

Lines conveying materials containing foreign matter detrimental to the operation of instruments or

equipment shall have strainers of adequate capacity and design to ensure optimum operation.

Reducer at pump suction shall be eccentric with top flat, unless otherwise approved by

COMPANY. While concentric reducer should be used on discharge pump, suction and discharge

compressor.

Street ells, miter ells and cross reduction shall not be used unless approved by the COMPANY

Vents and drains on piping (excluding connections from orifice flanges, carriers and other

instrumentation) shall be DN 20 (NPS 3/4) minimum for non-hazardous service.

Small connections from hazardous service lines, e.g. nipples for vents, drains, pressure tapping,

and sample points, (excluding connections from orifice flanges, carriers and other instrumentation)

shall be DN 25 (NPS 1) minimum for strength.

If vent and drain connections are not provided on equipment, blanked branches shall be provided

on the attached piping and shall be of the following minimum size:

Equipment Capacity Vent size Drain size

m3 (ft3) NPS (DN) NPS (DN)

d 1.5 (50)

1 (25) 1 (25)

d 6(210)

1 (25) 1.1/2 (40)

> 6 to 17 (210 to 600) 1 (25) 2 (50)

> 17 to 71 (600 to 2500) 1.1/2 (40 3 (80)

> 71 (2500) 2 (50) 3 (80)





Vents and drains for pressure test purposes shall be sized as follows:

Pipe size Vent size Drain size

NPS (DN) NPS (DN) NPS (DN)

up to 6

up to (150)

3/4 (20) 3/4 (20)

8-14 (200-350) 3/4 (20) 1 (25)

above 14

above (350)

3/4 (20) 1 1/2 (40)

Vents and drains for fiscal metering systems shall include double isolation with one lockable valve,

and drip-type sight glass for leakage detection.

Bolt holes of flanges shall straddle the normal horizontal and vertical centerline of the pipe, unless

noted otherwise.

Unless otherwise specified by COMPANY, threaded joints and fittings shall not be used for:

- Hydrocarbon service.

- General chemical service.

- Corrosive fluid.

- Steam service.

- Vibrating or cyclic Service.

Where screwed piping is unavoidable, such as for instrument connections, the first block valve off

the process line shall be socket-welded on the process lane side.

No threaded joints or fittings shall be used between a pressure vessel or main pipe line DN 50

(NPS 2) or above, and the first block valve isolating a piping system. This valve shall be flanged or

may be socket-welded with a flanged joint immediately downstream, subject to COMPANY

approval.

If vibration is expected in service, e.g. on rotating machinery, specific means shall be provided for

pipe guidance and support where threaded fittings are approved by COMPANY.

For in kind replacement on existing threaded piping in brown field, the last join on both sides

connected to the existing shall be seal weld or use flange connection. Parallel thread plugs are

recommended for high pressure applications. Use of PTFE tape is not allowed in the case of plugs,

unless permitted by COMPANY.

Weld tees with one "run" end capped shall be used in lieu of elbows on flowlines from the

Christmas tree to the manifold. Tee shall be oriented such that the "run" end of the tee is upstream

and the branch end downstream of the change in direction.

Weld tees with one "run" end capped shall be used in lieu of elbows on flowlines from the

Christmas tree to the manifold. Tee shall be oriented such that the "run" end of the tee is upstream

and the branch end downstream of the change in direction.

All accessories (i.e. TW, CP, CC, valves, etc) mating to vessels or pipes shall be made of material

compatible to the vessel or pipe it is attached to and to the process conditions. If accessory

material compatibility is not possible, then the accessory connection shall be flanged with isolating

flange kit installed, or shall have some other means or electrical isolation.

Piping handling flashing liquid streams shall be designed to minimize possibilities / effects of pipe

erosion.

All insulated piping system shall be designed to minimize external corrosion due to the salt-laden

environment, by installation of condensate drain points at low points in the piping layout. All pipe

that will be insulated will be sandblasted and primed in accordance with Specification PHEONWJ-

L-SPE-0001.





Where the downstream system from a liquid level control valve assembly, controlling a liquid/gas

interface level, is of a pressure rating which is below the maximum expected operating pressure of

the upstream system, the liquid piping upstream of the spec break shall include a shutdown valve

which is independently actuated from a low-low level switch. Additionally, the shutdown valve

should automatically reset to the open position when the low-low level event has been corrected.

Cast iron and malleable iron pipe, fittings, valves, strainers, and other components shall not be

used by the CONTRACTOR. The limited use of these fittings as standard components furnished by

the engine/compressor manufacturers, shall be under strict COMPANY s approval.

Weld reducers shall be used for reducing pipe size if the small end is DN50 (NPS 2) pipe size or

larger. Swages shall be used if the small end is DN40 (NPS 1 1/2) pipe size or smaller. Swages

used with socket-welding fittings shall have plain ends.

The use of asbestos materials is not permitted. Gaskets shall be as per the applicable line service

classification in Project Piping Materials Specification. Material, dimension, tolerance and marking

for metal ring joint gasket, spiral wound metal, metal jacket gasket and filler shall comply with

ASME B16.20.

FRP piping shall be protected from UV degradation. CONTRACTOR shall specify external coating

if there is no factory applied coating. Joining of FRP pipe shall be in accordance with

manufacturers recommendation. Fire water piping shall have approved external in tumescent fire

proof coating.

Spading (Blinding) positions or other means of positive isolation requiring access during routine

operation shall be accessible without the use of scaffolding. Spade shall be rating and shall be met

requirement B16.48.

Piping header shall generally terminate with a flange and shall be installed to allow for future

expansion of the header.

Pulsation Dampeners shall be included on the suction and discharge of all reciprocating pumps,

unless approved otherwise by COMPANY. All pulsation dampeners shall be located as close as

possible to the pump, on the pump flange, if possible. Pulsation dampeners shall be adequately

supported so that the pump flanges are not over stressed.

4.2 Piping Layout

Layout of piping shall consider economy, accessibility for operation, maintenance, construction and

safety.

Pipe work and equipment shall be arranged so that escape routes can be established and are

easily accessible. Piping shall be laid out so that equipment such as Control valves, relief valves,

start-up strainers, pump casings and rods, heat exchanger bundles, Compressor pistons, etc, can

be operated, serviced or removed with a minimum amount of dismantling and without providing

additional supports. Access to manholes and access openings shall not be obstructed.

Straight run for flow meters which required accuracy such as orifice meter, turbine meter shall be

based on AGA-3 or flow meter installation requirement.

Piping and equipment shall be laid out so that dismantling of adjacent piping or equipment is not

required to access or remove a piece of equipment. Provisions shall be made for access from

platforms, ladders or from the deck. Use of chain wheels and extension stems must be avoided.

Clearance shall be made for control valve actuator and/or shutdown valve actuator removal without

removing valve body from piping system.

Gauge glasses, gauges and other instrumentation shall be oriented so they are visible from the

deck or access platform. Drain and vent valves shall he located as conveniently as possible, at or

near operating levels.





An access space of 2,200 mm height or length and 915 mm diameter is required for all corrosion

probes. Locate the corrosion probe accessible from deck access.

All un-insulated lines shall be located so that bottom or top of pipes in a piping run or header area

are at the same elevation, depending upon the method of support. If possible, all lines running

Platform North or Platform South shall be a minimum of 600 mm different in elevation from lines

running Platform East or Platform West. Insulated lines shall have bottom of shoes at the same

elevation as bottom or top of pipes as adjacent un-insulated lines, whichever is the reference.

Piping shall he located so as not to present overhead or stumbling hazards. Minimum clear

headroom for all overhead pipe ways shall be 2,400 mm.

Where line size reductions are required for inline equipment (control valves, relief valves, etc.),

such reductions and enlargements shall be located at the closest available fitting to the engineered

product assembly.

Gravity-flow drain lines shall be sloped at 1:100. Branch lines which are used it intermittently (such

as vessel drains) shall enter drain headers from above the center line of the drain header to

prevent liquids from standing in the branch lines. Gooseneck seals are not acceptable in module

drain system. Module drain systems shall have seal pots with baskets in vertical runs.

Deck drip pans may use Goose neck seals with an adjacent flanged clean out point.

Sample probe connections shall be in the centre of the pipe at a location with turbulent flow.

Sufficient space shall be allowed between adjacent lines at changes of direction to prevent

damage of one line by another due to expansion or contraction. Lines running side by side shall

have a minimum clearance of 25 mm between a pipe and an adjacent flange, after allowing for

insulation and deflections. Attention shall be given to pipe movement caused by thermal

expansion.

Flanges in parallel pipelines, shall be staggered with a minimum of 150 mm (6 in) longitudinal

clearance between the flanges or insulation boxes. Distance between insulated pipes shall be a

minimum 250 mm (10 in) to allow for inspection.

Lines crossing each other shall have a minimum clearance of DN25 mm (NPS 1) pipe-to-pipe, after

allowing for insulation and deflection.

Piping shall be designed to minimize pockets and low points. High and low points of piping shall be

provided with vents and drains.

Elbows shall be long radius, unless otherwise approved by COMPANY.

Piping at pumps, compressors and other rotating equipment shall be supported in such a manner

that the equipment may be removed without affecting the piping and shall be supported to prevent

the transmission of excessive moments and forces to equipment.

Piping layout shall ensure that valves, Corrosion Monitoring devices are readily accessible, easily

operated and provide proper access to allow maintenance of valves or retrieving corrosion coupon

in situ. The design shall enable valves to be removed without hot work where this is not normally

permitted.

Pipe bridle columns for instrument installation shall be 3" minimum pipe size and shall be

adequately supported.

Valves for emergency isolation of equipment shall be accessible from ground level, or from a

permanent access.





Valves that are used during routine operations or an emergency shall be located so that they are

accessible from grade or a suitable platform. The valves shall be installed such that the bottom of

the hand wheel is no more than 1.5 m (5 ft) above grade or platform.

If this requirement becomes impractical (e.g. platforms required in awkward locations such as

around pumps, inadequate space, etc.) a deviation may be granted with approval from the

COMPANY for alternatives such as allowing the use of gear operators with extended stems or

chain wheels.

Valves shall not be installed with their stems below horizontal except for flare and relief line valves.

Sufficient clearance shall be provided for satisfactory operation of lever valves. Allowance for

insulation boxes shall be made.

If valves are secured in position by clamping between pipe work flanges, the effect of removing the

adjoining pipe work shall be taken into account.

All Check Valve shall be oriented in horizontal position, except with written company approval.

4.3 Relief Systems

Piping runs below relief valves shall be kept to a minimum resulting in less than 10% inlet loss, but

in no case should exceed ten (10) pipe diameters.

Discharge lines from relief devices shall slope so that any liquids which may accumulate will drain

away from the relief devices. Relief valves, vents, blow down lines, etc. shall enter vent headers

from above the center line of the header. If compression system relief lines are piped individually to

atmospheric vent in a safe area, they shall terminate at a common area above the aerial cooler,

Weep holes and exit flappers shall be provided for all atmospheric discharging relief devices with

vertical tailpipes.

If a relief system is using drip leg, the relief header shall enter the drip leg from the side with gas

leaving from top of drip leg.

4.4 Provision for Expansion and Flexibility

Provision for thermal expansion and contraction shall be made in all lines in accordance with the

requirements of the governing codes. Provisions for expansion shall normally be made by

providing change in direction of the pipe. Expansion joints or loops shall be provided only when

required flexibility cannot be achieved by the piping configuration. All piping systems shall be

designed such that the loads and moments applied at the flanges of mechanical equipment shall

not exceed the permissible reactions for this equipment as specified by the manufacturers of the

equipment.

4.5 Pipe Support and Anchors

All piping shall be adequately supported generally by supports of proper structural design and shall

be provided with suitable anchors, sway braces or vibrations dampers to prevent excessive forces

and vibration on equipment. Hanger rods, if used, shall be designed to take the load and be

constructed of rod not less than 10 mm diameter. Piping at valves and mechanical equipment,

such as pumps, requiring periodic maintenance shall be supported so that the valves and

equipment can be removed with a minimum necessity of installing temporary pipe supports. Piping

shall not direct contact to pipe support. Use corrosion isolator and U-Bolt wired to avoid device

corrosion in the future.

Piping that requires stress relieving shall have supports attached by clamps or other means which

do not required welding to the pipe. Welding attachments necessary to such piping may be made

prior to stress relieving.





Common/Multiple supports shall be utilized wherever possible.

Hangers and supports shall be designed for fabrication and installation in accordance with ASME

B31.3, Chapter II, Part 5. Supports shall be specified by Standard Numbers and shall be detailed

on drawings. Additional pipe supports shall be field installed if the COMPANYS field representative

determines that there is inadequate support. When necessary, adequate temporary supports shall

be installed during erection so as not lo overstress piping, or the equipment to which piping is

being connected.

Hangers and supports shall be installed so that they do not interfere with the free expansion and

contraction of the piping between anchors. All piping shall he carried on properly adjusted hangers

or properly leveled supports.

Hangers that are adjustable under load should be used for lines where it is desirable to maintain an

exact elevation. Otherwise, rigid hangers may be used. Where adjustable hangers are used, rod

thread shall engage the full length of the threaded portion of the turnbuckle or adjusting nut.

The use of pipe support designs which require welding directly to the piping shall be minimized.

Where such designs are required and where the service involves low process temperatures or

vibration, a doubler plate shall be used between the piping and the pipe support.

Small bore pipe DN 40 (NPS 1.1/2) and less shall be field routed and supported unless noted

otherwise in piping support drawings.

Dead legs for supporting pipe are not permitted without specific COMPANY approval. Where

approved dummy dead legs shall normally be two pipe sizes smaller than the pipe run and should

be welded so the surface contacting the support will be at the same level as the pipe. Dummy dead

legs shall have capped ends, a weep hole, and shall be seal welded.

Piping anchors and guides shall be installed in accordance with the drawings and specifications.

The use of anchors and guides will be kept to an absolute minimum as dictated only by their

necessity to prevent extreme malpositioning, localized over- stressing or pipe materials, or

excessive forces or moments on equipment. Where guides are required, slotted hole/guide bolts

are not permitted. Shoe-in-saddle guide arrangements are preferred.

4.6 Joints and Connection

Joining of all piping systems two (2) inches and above shall preferably be accomplished by butt

welding. Joining of piping one and one half (1) inch and under shall be accomplished by socket

welding or screwed connections and also be in compliance with the piping material specification.

Generally, piping connections to vessels and other equipment shall be flanged. For minimum

isolation requirements refer to Table 1 attached.

TFE tape shall be used on threaded joints to ensure adequate sealing.

4.7 Branch Connections

Branch connections are indicated on a branch connection chart which shall be included in the

Piping Material Specification PHEONWJ-M-SPE-0025. This will be the preferred method of making

branch connections.

Care shall be exercised in the detail design of small branch connections to prevent mechanical

damage or breakage due to vibration or excessive force. Connections that may require bracing

include sample points, instruments, purges, thermal relief valves, corrosion probes, and vent and

drain connections (particularly where double blocks and bleeds are required). The bracing method

shall be subject to the approval of COMPANY. Care shall be taken in the location of small

connections in piping subject to thermal movement.





4.8 Line and Connection Sizes

Pipe sizes 1, 2 and 3 and all odd number sizes, such as 5 and 7 shall not be used except

where required for connections to mechanical equipment of standard design or where specific

velocities must be maintained. Piping smaller than shall not be used.

Stainless Steel 316 tubing with formed bends and tubing fittings shall be used when sizes smaller

than are necessary.

Where a line of high pressure-temperature rating connects to a line of lower rating, the higher

rating shall prevail up to and including whichever one of the following changeover points occurs in

the lower rated lines:

- The first block valve.

- The first two block valves on double valves lines.

- The block valves on both sides of control valves and the control valve by pass.

Where a material classification change occurs the higher classification shall prevail as stated

above.

4.9 Change in Direction

Change in direction of welded piping shall be made with long radius elbows or equal tees in the

case of wellhead flowlines. Short radius elbows, reducing elbows or bends shall only be used with

COMPANY approval.

4.10 Reducers

Reduction in line sizes shall be made by screwed, socket weld, butt weld or flanged reducing

fittings, or swages, in accordance with applicable piping codes and the Piping Material

Specification PHEONWJ-M-SPE-0025. Bushings and socket weld inserts shall not be used.

4.11 Flanges

The use of flanges in piping shall be limited to connections at equipment, manifolds, skid packages

and valves.

Flanges shall also be provided in special cases such as:

- Where frequent dismantling of piping is required.

- Where plastic or non-metallic piping systems cannot be welded or otherwise jointed

except by flanges.

- To provide clearance for dismantling of equipment such as compressors, filter heads, etc.

- Packaged equipment, where one or more modules are to be connected to another module.

- Installation of temporary strainers in suction lines to compressors and pumps.

- Slip-on flanges shall not be used, except when approved by COMPANY.

- Flanges of ANSI Class 400 shall not be used except when required for equipment

connection.

- Flat-faced steel flanges shall not be used, except when required for connection to

equipment having flat-faced cast or ductile iron flanges.

- Reducing flanges shall not be used except when no available space for reducing fittings or

swages.

- Jackscrews shall be provided for all flanges joint, when spacer or blank installed. In special

case also to be provided on ring type joint flanges if required for ease of piping or

equipment removal.

Dimensional standard of flanges up to and including 24 shall be in accordance with ANSIB16.5,

while for flanges above 24 shall be in accordance with ASME B16.47 Series A.

Raised face flanges and flanged valves for use with spiral wound gaskets up to and including

Class 900 rating shall be ordered to comply with ASME B16.5.





Ring-joint flanges shall be furnished in accordance with ASME B 16.20.

A gasket face finish suitable for both composition and spiral-wound gaskets is required on raised

faces of pipe, fittings, valve, and equipment flanges. The required finish shall be serrated and

generated either concentrically or as a continuous spiral groove by a round nosed tool. Serration

generated by a v-nosed tool is not acceptable for spiral wound gasket applications. The serrated

surface finish shall have a 125 to 250 micro inch roughness.

4.12 Plugs

Plug shall be solid steel hex and shall be installed on all open ended valves such as vent, drain,

level instrument servicing valves, and sample valves.

4.13 Valves

Valves shall be selected in accordance with the project Piping Materials Specification (PHEONWJ-

M-SPE-0025), Valve Specification (PHEONWJ-M-SPE-0023) and the relevant Valve data sheets.

Manually operated Ball and Plug Valves shall have operators provided as follows unless stated

otherwise in the Project General Valve Specification:

Ansi Rating

Valve Size -Lever Operated Valve Size-Gear Operated

150# DN15 -100 mm (NPS 1/2" - 4") DN150 - 400 mm (NPS 6" - 16")

300# DN15 -100 mm (NPS 1/2" -4") DN150 - 400 mm (NPS 6" - 16")

600# DN15 - 80 mm (NPS 1/2" -3") DN100 - 400 mm (NPS 4" - 16")

900# DN15 - 50 mm (NPS 1/2" - 2") DN 80-400 mm (NPS 3"-16")

1500# DN50 mm (NPS 2") DN 80 - 200 mm (NPS 3" - 8")

2500# DN50 mm (NPS 2") DN 80-100 mm (NPS 3"-4")

Sample, vent and drain valves shall be located at convenient locations for operation. In addition,

valve drains and vents shall be provided at low points and high points in lines where liquids or

gases could be trapped during testing or operation. All valve process drains and vents shall be

shown on P&IDs.

Drain valves on tanks and pressure vessels shall be adjacent to the vessel whenever possible.

All valves shown as locked open (LO) or locked closed (LC) shall be equipped with a fitting that will

permit the valve to be locked in either the open or closed positions. No one position locks will be

permitted.

Ball valves shall be used for general on-off applications for all pressure ratings at temperatures

between -20 and 200F. The temperature range is limited by the resilient seat which contacts the

ball. The quarter turn action makes the valve desirable for block or isolation valves. Ball valves and

vent valves in pressure classes through ASME 600. Ball valves are not be used for throttling or in

sandy or otherwise erosive service.

All lubricated ball valves shall be lubricated and stroked before testing to insure proper sealing and

operation, Alemite lubrication fittings and Rockwell Nordstrom Valve Formula 921 or Valtek

Lubsealant No. 80 are required.

All ball valves shall be full port.

Open end valves including drain and vent valves not connected to drain and vent systems shall be

closed with forged steel plugs or blind flanges.

Gate valves may be used for on-off valves for any gas or liquid service at any pressure and, with

suitable packing, at any temperature. Gate valves may be used for services where the temperature

is over 200F and quick shut-off is not required. They shall not be used .for throttling.





Globe valves should be used for manual throttling because they have high internal fluid resistance.

Metal seated globe valves for temperatures over 200 F.

Bolted bonnets and inside stem screws are preferred for gate and globe valves when available.

Screwed or welded bonnets and outside screws may be used for applications where the preferred

types are not available. An exception to these guidelines is the application of gate valves for

isolation services in firewater systems, where outside screw and yoke is required.

Flanged check valves 2" nominal size and over shall be of the horizontal swing type except for

reciprocating compressor or pump discharges where piston-type check valves shall be used. Ball

checks and lift checks are for lines sized 1-1/2" and smaller.

With COMPANY approval, wafer check valves with swing type clappers or spring loaded dual discs

may be used as an option to flanged swing check valves in ASME pressure class 600 and lower.

Flanged check valves shall have bolted bonnets. Removable discs and seats are required for

swing check valve.

Within proper temperature limits, check valves may have resilient seats of Teflon or Viton. The

resilient seat shall be held in position by the configuration of the seat holder. The valves shall not

depend on adhesives to hold the seat in place.

Sample, vent and drain valves shall be located at convenient locations for operation. In addition,

valve drains and vents shall be provided at low points and high points in lines where liquids or

gases could be trapped during testing or operation. On the "Issued for Construction" P&IDs all

drains and vents shall be shown, with service indications noted.

Drain valves on tanks and pressure vessels shall be adjacent to the vessel when possible.

All valves shown as locked open (LO) or locked closed (LC), shall be equipped with a fitting that

will permit the valve to be locked in either the open or closed positions. No one position locks will

be permitted.

All valves with resilient seats must have actual pressure temperature ratings checked with valve

Manufacturer.

All screwed valves 1-1/2" and smaller must be inside screw.

Double Block and Bleed Valve or Double Isolation and Bleed Valve requirement shall refer to

document PHEONWJ-O-PRC-0025, Guidance on Engineering Method, Standard Isolation.

4.14 Spec Breaks

Changes in pressure ratings of piping systems shall be made at block valves. The block valve is

normally on the low pressure side of a control, relief or check valve. The valve which divides the

two systems and all piping and valves on the high pressure side of that valve shall be rated for the

high pressure service. If a by-pass is furnished, the by-pass valve and piping on the high pressure

side shall be rated for the high pressure. Piping spec breaks between piping and vessels will be

taken at the vessel flange.

5. Equipment Piping

5.1 Pump Piping Installation

Suction lines to pumps shall be designed for supports in a manner that will avoid traps and pockets

resulting from thermal expansion. Dropout spools for maintenance of in line strainers, or pump

casing access, shall be provided as required.





Valves in pump suction lines shall be line size. Valves in discharge lines 3 and larger may be less

than line size, but not less than pump nozzle size. If a reduction in valve size is desired, it shall be

shown on the P&ID. Where reduction is required at horizontal pumps suctions, use eccentric

reducers piped to eliminate vapor pockets with the flat part of reducer on top. The discharge line

from centrifugal or rotary pumps shall be provided with a check valve between the pump and the

block valve; for vertical discharge pumps, the check valves shall be located in the vertical line

whenever possible.

The pipe shall be connected to the equipment without making any tight connections to flanges.

Flat-face flanges and full-face gaskets shall be used on piping connecting in equipment with flat-

race flanges. Flanges shall be checked to assure that no strain is placed on the equipment. If pipe

is not in correct alignment, it shall be removed and corrected. The correction in alignment shall not

be made while the pipe is connected to the equipment. Flat-face flange shall not be used for

hydrocarbon services.

After alignment is found correct, the flanges shall be "bolted up" with the stud bolt centered in the

flanges and the nuts having equal threads showing.

Pressure gauge connections shall be on the pump side of the discharge valve. Suction and

discharge line of pumps shall have drains located at the low point of the pump casing wherever

possible.

Gland and sealing oil systems and cooling water piping shall be furnished in accordance with the

pump VENDOR s recommendations.

Temporary or permanent strainers as shown on P&ID shall be installed at the largest flange

between the pump suction nozzle and the first valve in the suction line. Strainer screens shall have

open area equal to 250% of the cross section of the pipe.

5.2 Vessel Piping

Piping shall be oriented to maintain access to vessel appurtenances such as manways, inspection

openings and instrumentation.

Care must be taken to ensure that all instrument connections are orientated to allow for installation

and also ease of observation and/or adjustment.

Piping and Instrumentation connections to vessels shall be in accordance with the Piping Material

Specification PHEONWJ-M-SPE-0025.

Vent connections shall be provided for each vessel. Vent connections may be located on adjacent

piping if piping exits the top of the vessel. Vent connections required for hydrostatic testing only

shall be plugged or blind flanged. Vent connections required to be operated during start-up or

normal operation shall be valve, 3/4 minimum size and plugged.

Drain connections shall be provided for all vessels. Where possible the drain connections shall be

located on the vessel. In certain circumstances the drain connections may be located in the

adjacent piping. All drain valves connecting to main process vessel shall be 2 minimum sizeand

3/4 minimumsize for others.

Spectacle blinds or piping spools shall be provided in the piping connected to vessels to facilitate

periodic statutory inspection and testing.

5.3 Gas Compressor Piping

Compressor suction and discharge piping shall be arranged to provide clearance for service work

on the compressor with a minimum of pipe dismantling.





Supports shall be provided as required to maintain compressor suction and discharge nozzle loads

below manufacturers specified limits.

A temporary strainer with minimum 250% equivalent area shall be installed in the suction line of all

new compressor installations. Breakout flanges shall be provided for ease of installation and

removal.

Block valves shall be provided on main suction and discharge compressor lines. The compressor

automated valves cannot serve this purpose. Valves shall normally be regular port unless pressure

drop is critical. Manual isolating valves or spectacle blinds shall only be supplied when project

specifications require them.

Check valves shall be installed in the discharge lines as close as possible to the discharge nozzle

of centrifugal compressor.

Pressure and temperature gauge connections shall be provided on suction and discharge lines.

5.4 Shell and Tube Heat Exchangers

Piping to exchangers shall be supported as required to maintain nozzle loading below

manufacturers recommended loadings.

Outlet piping from Shell and Tube Heat exchangers where liquid condensation may occur shall be

designed to be self-draining. On elevated lube oil cooler installations a check valve and 3 way

bypass valve shall be installed to prevent siphoning of system back into on skid lube oil storage

tank.

5.5 Diesel Engine

Piping shall not be run directly over diesel engines, exhaust piping or any position where leaking

fuel oil can impinge onto hot parts. The pipework should not be supported by hanger type

supports. The fuel oil header shall not be dead ended, to simplify cleaning/purging.

Where a positive static head is required from the day tank, the minimum operating level shall be

1 ft above inlet of the fuel injection pump.

The drain line from the day tank shall be positioned so that the drain line outlet into the main drain

is visible from the drain valve position.

5.6 Vents and Drains

In general, venting and draining shall be accomplished through vessel and/or equipment

connections. Vessel vents and drains may be located in the piping, between the vessel and the

first block valve. Vents which are not valved shall be plugged.

Operational vents in flammable service shall be piped to the vent header or to a safe area.

Vents and drain connections shall be provided in all piping systems subject to Hydrostatic pressure

testing and sequential maintenance.

Vents shall also be provided on high points of piping and drains shall be provided on low points of

all piping. Drains emptying into open receptacles shall terminate 2 above the top of the drain

receptacles and the discharge shall be visible from the location of the drain valve.

Unless otherwise specified, the minimum size of vent and drain connections shall be 3/4

For minimum isolation requirement of equipment and piping refer to table 1.





5.7 Corrosion Monitoring

Corrosion monitoring facility shall be installed in horizontal line pipe, with position on the top of pipe

(12:00 oclock position). Installation of the corrosion monitoring devices (coupon or probe) will

depend on various process conditions so its devices shall be installed by Corrosion team to get

represent corrosion data.

Standard requirement of straight run on upstream and downstream of corrosion monitoring facility

are 7D for upstream and 3D for downstream from equipment that change the flow regime, where D

is outside diameter of line pipe.

Standard type of corrosion monitoring facility is Two-Inch system access fitting non tee flange type.

Other type shall have written approval from COMPANY.

Location of corrosion monitoring shall be accessible. Maintenance area shall be provided for

retrieving coupon typically 1 meter radius and 2 meter height from fitting is required. Adequate

service platform and ladder may be built if the location of corrosion coupon / probe not on floor

level.

Corrosion monitoring devices shall be installed upstream of chemical injection devices.

Detail guideline for corrosion monitoring facility installation shall refer to the document no.

PHEONWJ-L-PRC-0103 rev.0 Guideline for Design and Installation of Corrosion Monitoring

Facilities.

5.8 Chemical Injection Points

As well, chemical injection point should be installed in horizontal pipe with position on the top of

pipe (12.00 oclock position).

Standard type of corrosion monitoring facility is Two inch system access fitting tee flange type.

Other type shall have written approval from COMPANY.

Injection devices shall use injection tube and quill to disperse chemical solution into fluid evenly.

Length of injection tube shall be located at middle line of fluid flow.

Detail guideline for chemical injection point shall refer to the document no. PHEONWJ-L-PRC-

0103 rev.0 GUIDLINE for Design and Installation of Corrosion Monitoring Facilities or consult to

Chemical & Corrosion team.

6. Requirements for Individual Piping Systems

6.1 Requirements for Process Piping Systems

CONTRACTOR shall submit installation detail drawings for COMPANY approval.

Sample connections shall be supplied as indicated on the P&IDs. All connections for sampling

shall be unless otherwise specified on the P&ID legend sheet.

Relief Valves

Relief valve piping shall be designed in accordance with the requirements of API RP 520, Part II,

Design and Installation of Pressure - Relieving Systems in Refineries.

Relief valves which discharge to atmosphere through discharge piping shall have the pipe

extended at least ten (10) feet above any platform or working area within 25 foot radius of point of

discharge. Relief valves may be located on the piping rather than on the vessel being protected

only if the following criteria applies:





Line pressure does not restrict design capacity of the valve.

There are no block valves or restriction between relief between relief valve and vessel.

Relief valves shall have a minimum of piping between the protected line of equipment and the

valve outlet.

6.2 Requirements for Utility Systems

Service Water Piping

All service water lines shall be installed so that the system will remain full of water in the event of a

shutdown of supply pumps. Shutoff valves in supply branches shall be located as close to the main

supply line as possible.

Utility Outlets

Utility service outlets for water and air shall normally be a minimum of . They will be provided at

selected locations and shown on the applicable P&IDs and Piping GAs. Areas to be served shall

be within reach of the provided hose. Utility outlet connections shall be grouped together.

Seal Gas and Fuel Gas Piping

Pockets or liquid traps in piping systems shall be avoided whenever possible. Where pockets and

traps are unavoidable, provision of automatic or manual drains will be made as necessary. Branch

connections shall exit the top of fuel gas / instrument gas headers.

Open Drain Systems

A separate oily water drain shall be supplied to the extent shown on the P&IDs.

Connections between equipment drain lines and the oily water drainage system shall not be

permitted.

The oily water drainage system shall be properly trapped and / or sealed and piping shall be

designed to ensure that all branches and mains can be cleaned and / or repaired without the

necessity of moving process equipment.

Closed Drain Systems

The closed drain system shall provide for all intermittent hazardous drain requirements, and those

hazardous liquids that cannot be recovered in the process.

6.3 Stress Analysis

Piping stress analysis shall be performed on all lines defined as critical as per Pipe Stress Analysis

Requirement & Guidance shall refer to PHEONWJ-M-SPE-0022.

7. Materials and Applications Instructions

7.1 Pressure and Temperature Ranges

Piping components including valves, fittings, flanges, bolting, gaskets, and other components listed

on the Piping Material Specification PHEONWJ-M-SPE-0025 shall be used for service conditions

within the temperature and pressure ranges of the respective classification.

Piping components not covered by the Piping Class Data Sheets shall be approved by COMPANY.

7.2 Steel Pipe

The carbon content of A106 Grade B pipe material shall not exceed 0.23%.

The carbon content of A105 material shall not exceed 0.25%.





The carbon content of API 5L pipe material shall refer to table 2A or 2B of Standard API 5L

Specification for Line Pipe.

When size limitations preclude the availability of seamless pipe, substitution of electric resistance

welded (ERW) or double submerged arc welded (DSAW) pipe made from plate with 100%

radiography shall be permitted within limitations established elsewhere in this specification.

Substitutions are subject to the approval of COMPANY.

7.3 Socket Weld vs Threaded

Threaded, seal-welded piping shall not be substituted for socket weld construction piping except as

required by the Piping Material Specification PHEONWJ-M-SPE-0025 for specific services subject

to the approval of COMPANY.

Threaded valves and fittings may be used in socket weld construction piping where joints must be

disconnected, such as plugs in vents, drains, and cleanouts; connections to equipment and

instruments; and for the first block valve downstream of instrument taps.

Threaded joints on the pressure side of the first block valve shall be seal-welded (in socket weld

construction piping), covering all exposed threads in accordance with ASME B31.3, Process

Piping.

7.4 Heat Treatment

All forgings shall be normalized and all stainless steel shall be in the solution treated condition.

7.5 Sour Service Materials

Materials for use in hydrocarbon containing piping systems which may be exposed to a sour

environment shall meet the applicable requirements of NACE MR-01-75.

7.6 Painting

Piping, valves and piping specials shall be prepared and painted in accordance with PHEONWJ-L-

SPE-0001, Painting Specification for External Metal Surfaces.

Manufacturer standard paint finish and color shall not be acceptable. All valves shall be blasted

and painted strictly in accordance with the above mentioned specification.

7.7 Tubing

All field run lines for chemical service as corrosion inhibitor, demulsifier, defoamer and scale

inhibitor shall be run in 316 stainless steel seamless tubing with compression type fittings. The

tubing shall be field run on tubing ladders or tubing tray.

8. Quality Assurance and Quality Control

All piping materials including valve pressure containing or load bearing parts shall require a

material certificate in accordance with BS EN 10204 (2004) type 2.1, 2.2, 3.1 and 3.2. Wetted

parts other than above shall require a material certificate in accordance with BS EN 10204 for

carbon steel and 3.1.B for stainless steel and low temperature carbon steel.

Certification for bolting shall be in accordance with BS EN 10204 unless stated otherwise.

Pressure containing parts for valves are as follows:

- Ball Valve Body, Bonnet and Stem

- Globe Valve Body and Bonnet

- Gate Valve Body and Bonnet

- Check Valve Body and Cover





9. Identification and Marking

Valves, fittings, flanges, and unions shall be marked in accordance with MSS SP-25, Standard

Marking System for Valves, Fittings, Flanges and Unions.

Valves shall have the tag number stamped (minimum size 10 mm high) on a 316 stainless steel

tag and attached to the valve with stainless steel wire. Embossed stainless steel bands are

acceptable.

10. Identification System

The system to be used for identification of specific piping systems, including the line numbering

method and valve tag refer to drawing piping and instrument diagrams legend sheet symbols and

notes on Project PID legends sheets.





Table 1 Minimum Isolation Requirement

System

Class

System Description

Minimum Requirement

Intermittent Minor

Work (1)

Major Work (1)

Regular Short

Entry Required (1)

A A shutdown,

depressurised and

hydrocarbon free

system where

pressure cannot enter

from any other

system

No isolation Positive isolation by

a spade, blind or

removed line part

(for vessel entry

only)

No isolation

B All systems not

mentioned under A or

C

Single leak-tight

closed valve

Single leak-tight

valve plus a spade,

blind, or removed

line part (2)

Double block and

bleed

C Systems containing

gas, with design

pressures of 900 psig

and above

Double block and

bleed

Double Isolation

and bleed plus a

spade, blind or

removed line part

(2)

Double block and

bleed

Systems containing

liquid, of ANSI Class

600 rating and above

All systems

containing H2S and

20 ppm

Notes:

1) Minor work is defined as a job of a routine nature, e.g. control valves or pig-trap opening.

Major work is defined as a job of complex nature, e.g. inspection/maintenance shutdown or

vessel entry. The decision whether to spade should be based on the duration of the risk of

isolation failure when spading or when doing the job.

2) A Bleed connection should be installed between the valve and the spacer or blind for line

sizes of 6 inches and above design pressure of 900 psig and above. This connection has

the dual purpose of checking that the isolation valve is sealing and of serving as a draining

and depressurizing facility when the valve has passed and the spade has to be removed

after the job is complete.

3) For removal of ESD valves, this will apply up to ANSI 600# ratings; for ANSI 900# ratings

and above, a removable spacer only shall be used.
