PPCoN Additional Technical Requirements
Piping Design Requirements for Modifications to Existing Facilities
Phillips Petroleum Company Norway
PPCoN Additional Technical Requirements
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Contents
ADDITIONAL REQUIREMENTS TO NORSOK STANDARDS
3
Disclaimer ..........................................................................................................................................3
1.
INTRODUCTION
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.
1
Objective and Scope ...............................................................................................................1
Responsibility and Ownership.................................................................................................1
Approval ..................................................................................................................................1
Distribution ..............................................................................................................................1
Filing ........................................................................................................................................1
Registration .............................................................................................................................1
Abbreviations ..........................................................................................................................1
References ..............................................................................................................................2
1.8.1 NORSOK References ..................................................................................................2
1.8.2 PPCoN References ......................................................................................................2
1.8.3 Other References .........................................................................................................3
Non-Conformances .................................................................................................................3
TECHNICAL REQUIREMENTS
2.1
2.2
2.3
2.4
2.5
4
General ...................................................................................................................................4
2.1.1 Introduction ..................................................................................................................4
2.1.2 Piping Specifications ....................................................................................................4
2.1.3 Valve Specifications .....................................................................................................5
2.1.4 Material Data Sheets....................................................................................................5
2.1.5 Tie in Points Between Existing and New Specifications ..............................................6
2.1.6 Surface Protection and Colour Coding of Piping .........................................................6
2.1.7 Use of Dissimilar Materials...........................................................................................7
2.1.8 Design Requirement Selection ....................................................................................7
2.1.9 Modification project ......................................................................................................7
2.1.10 Extension project ..........................................................................................................7
2.1.11 New system installation project ....................................................................................7
Flanges and Fittings on P-Spec’s ...........................................................................................8
2.2.1 Nipolet ..........................................................................................................................8
2.2.2 Screwed Pipe Plugs .....................................................................................................8
2.2.3 Flat Faced Cast Iron Flanged Fittings ..........................................................................8
2.2.4 Screwed Fittings ...........................................................................................................8
2.2.5 Access under Pressure Fittings ...................................................................................8
2.2.6 Slip Blinds and Spacers ...............................................................................................8
2.2.7 Branch Connections .....................................................................................................8
2.2.8 Bushings ......................................................................................................................9
Bolting .....................................................................................................................................9
2.3.1 Threads ........................................................................................................................9
2.3.2 Lengths ........................................................................................................................9
2.3.3 Bolt Tightening .............................................................................................................9
Special Applications ................................................................................................................9
2.4.1 Fire Water System .......................................................................................................9
2.4.2 Erosion Spools for Cu-Ni Pipework ..............................................................................9
2.4.3 Vendor Package Design ........................................................................................... 10
L-002: Piping Design, Layout and Stress Analysis .............................................................. 10
2.5.1 Numbering Systems .................................................................................................. 10
2.5.2 Valves Accessibility and Installation ......................................................................... 10
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2.6
2.7
2.8
2.9
2.10
2.5.3 Sample Points ........................................................................................................... 10
2.5.4 Equipment Piping ...................................................................................................... 10
2.5.5 Fire/Explosion Protection .......................................................................................... 10
2.5.6 Fittings ....................................................................................................................... 10
2.5.7 General...................................................................................................................... 10
2.5.8 Loads from Piping System on Equipment ................................................................. 11
2.5.9 Deck and Wall Penetrations ...................................................................................... 11
Layout and Stress Analysis for GRP Piping ........................................................................ 11
2.6.1 General...................................................................................................................... 11
2.6.2 Layout........................................................................................................................ 11
2.6.3 Stress Analysis .......................................................................................................... 11
Supporting ............................................................................................................................ 12
Demolition ............................................................................................................................ 12
2.8.1 Dead Flow Sections .................................................................................................. 12
2.8.2 Redundant Sections .................................................................................................. 12
L-CR-003 : Piping Details .................................................................................................... 12
2.9.1 5.1 General ............................................................................................................... 12
2.9.2 Annex A Typical Drawings ........................................................................................ 12
L-CR-004 : Piping Fabrication, Installation Flushing and Testing ........................................ 12
2.10.1 12 System Colour Coding of Piping .......................................................................... 13
2.10.2 Annex A - Alternative Test Methods ......................................................................... 13
2.10.3 CS Production Flowlines ........................................................................................... 13
ANNEX A
14
Cross Reference Table for Pipe Specifications .............................................................................. 14
ANNEX B
15
Pipe Specifications.......................................................................................................................... 15
ANNEX C
16
Valve Specifications ........................................................................................................................ 16
Ball Valves ........................................................................................................................... 16
Butterfly Valves .................................................................................................................... 17
Gate Valves.......................................................................................................................... 17
Globe Valves ........................................................................................................................ 18
Check Valves ....................................................................................................................... 19
Plug Valves .......................................................................................................................... 20
Notes for Valve Requisitioning ........................................................................................................ 21
ANNEX D
25
Slip Blinds and Start Up Strainers .................................................................................................. 25
ANNEX E
44
Variations In Design Principles ....................................................................................................... 44
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ADDITIONAL REQUIREMENTS TO NORSOK STANDARDS
Disclaimer
NORSOK Standard Cross Reference:
L-001 Piping and Valves, Rev.03
L-002 Piping Design, Layout and Stress Analysis. Rev. 02
L-CR-003 Piping Details, Rev.01
L-CR-004 Piping Fabrication, Installation, Flushing and
Testing, Rev.01
"The Phillips Petroleum Company Norway specifications attached to this homepage are
an unofficial and uncontrolled version and are set forth for information purposes only.
Contractors who have contracts with Phillips Petroleum Company Norway are advised
that they must comply with the binding, controlled version of the specifications set forth in
their contracts with Phillips Petroleum Company Norway, and that they are responsible for
ensuring proper compliance by their subcontractors with such controlled version of the
specifications."
For information please contact the following:
Tor Tangeland – [email protected]
Jan E. Stene
- [email protected]
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1.
INTRODUCTION
1.1
Objective and Scope
This document identifies the technical requirements for piping design in modification
projects on Ekofisk field platforms. This comprises amongst others guidelines for where
and when to apply the PPCoN ’P’ specifications in combination with NORSOK Pipe Class
Sheets, the Eko II (Kværner) Pipe Class Sheets and the Eldfisk EWI (Aker Offshore
Partner) Pipe Class Sheets. This document shall be read in conjunction with the
supporting documents listed under section 1.8 References.
Note that there is not a 1:1 relationship between this document and Norsok L-001 and
there is no reference to specific sections in L-001. This is, however, included for L-002, L003 and L-004.
1.2
Responsibility and Ownership
Leader Inspection Planning is the owner of this document and is responsible for updating
or withdrawal of the document as dictated by organizational or operational changes.
1.3
Approval
The procedure is approved by the Department Director, Maintenance.
1.4
Distribution
This document is distributed electronically only.
1.5
Filing
The Record Copy (RC) is filed by Department for Information Logistics.
1.6
Registration
The document is registered by its document number in PPCoN’s document administration
system (FYI) which is administrated by the Department for Information Logistics
1.7
Abbreviations
Cu-Ni
CS
GRP
DFI
EDS
MDS
MDT
MSS
NB
NFPA
NDE
Copper-Nickel
Carbon-manganese steel
Glass-fibre Reinforced Plastics
Design, fabrication and installation
Element Data Sheets
Material data sheet (NORSOK)
Minimum design temperature
Manufacturers Standardization Society of the Valve and Fitting Industry
Nominal Bore
National Fire Protection Association
Non-Destructive Examination
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SS
NPD
API
NORSOK
NSDP
PCS
RF
RTJ
UKOOA
VDS
TAG
Stainless steel
Oljedirektoratet
American Petroleum Institute
Norsk Sokkels Konkurranseposisjon
North Sea Design Premises (PPCoN)
Pipe Class Sheet (NORSOK)
Raised face
Ring type joint
UK Offshore Operators Association
Valve Data Sheet (NORSOK)
Teknisk Ansvarlig Gruppe ( i PPCoN)
1.8
References
1.8.1
NORSOK References
L-001
L-002
L-CR-003
L-CR-004
M-001
M-CR-621
M-501
M-630
R-001
P-001
H-CR-002
1.8.2
Piping and Valves
Piping Design, Layout and Stress Analysis
Piping Details
Piping Fabrication, Installation, Flushing and Pressure Testing
Material Selection
GRP Piping Materials
Surface Preparation and Protective Coating
Material Data Sheets Piping
Mechanical Equipment
Process Design
Piping and Plumbing
PPCoN References
4920
4056
3830
3831
3832
3842
4294
4368
PP-K-TF-00005
PP-P-TF-003
PP-F-TX-00001
4293
2805
2950
4924
Control of Non-Conformity
Engineering Directives-General
Hot Work
Repair and Modification of Equipment
Galvanic Corrosion Prevention in Piping
Pipe Nipples
Piping and Equipment Insulation
Material Data Sheets Piping
Welding and Inspection of Piping
Design of Flexible Hoses
Fire Protection System
Surface Preparation and Protective Coating
Retningslinje for Utstyr som settes Permanent ut av Drift
Prosedyre. Kontrollert bolttrekking.
Hydrostatic Pressure Test Waiver Procedure
1) KE-P-T-001
1) KE-P-T-046
1) KE-P-T-500
1) KE-P-P-500
2) B875-AE-P-00014
Piping and Valve Material Specification
Piping Colour Coding and Marking
Pipe Support Standard Detail
Pipe Support Design Procedure
Piping Spec.s for the Water Injection Proj. and Mod. Projects.
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Note: 1) These design specification shall be used on EkoX and EkoJ only.
NB! Also to be used for the piping systems installed on EkoC and EkoFTP as part
of the EkoII projects (Kværner p-spec’s).
2) This specification shall be used on 2/7E and on piping systems modified during
the Eldfisk EWI Project on the other Eldfisk platforms.
1.8.3
Other References
API 570
Piping Inspection Code. Inspection, Repair, Alteration, and
Rerating Of In-Service Piping Systems
Process piping
Design and Construction of Glass Reinforced Plastics Piping
Systems for Individual Plants or Sites
Flanged Joint Calculation
ASME B31-3
BS 7159
DIN 2505
1.9
Non-Conformances
This document contains both requirements and recommendations. Deviations from
requirements contained in this document shall be addressed to the position responsible
for this document, according to document no. 4920 “Control of Non-Conformity”.
Reporting according to procedure no. 4920 is not required for deviations from
recommendations, however, significant deviations shall be reported to the position
responsible for this document.
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2.
TECHNICAL REQUIREMENTS
2.1
General
Modifications to the existing facilities shall comply with the relevant NPD regulations and
conform to ASME B31.3, API 570 and this documet.
2.1.1
Introduction
Original piping design on PPCoN operated platforms have been to various sets of
specifications (e.g. Brown & Root, Worley, Kvaerner, Tecnomare etc.). From 1987 and the
introduction of North Sea Design Premises, section 12 'Topside Piping Design', new
platforms and modifications to exiting facilities and systems have been done in
accordance to specifications given therein. From 1994, NSDP has been withdrawn as an
official design requirement and is to the extent possible replaced by NORSOK.
Requirements given in the PPCoN document 4056 'Engineering Directives General' and
PPCoN TCD level 2 documents normally linked to the individual NORSOK standards shall
be used in addition to NORSOK.
Modifications to existing facilities shall to the extent possible be done within the NORSOK
technical envelope. However, where NORSOK does not match the conditions of the
existing platform systems, retained P-specs will apply, as described in Section 2.1.2
Piping Specifications. For the EkoX and EkoJ platforms, the original design specifications
listed in Section 1.8 References shall apply. Some exceptions to the referred NORSOK
standards will also apply, as stated in this document.
For 2/7E and piping systems modified during the Eldfisk EWI Project on the other Eldfisk
platforms the original PCSs (B875-AE-P-00014) shall apply. This document contains
basically “plain” Norsok PCSs, but some project specific PCSs have been developed to
cover the “voids” in Norsok.
NB! The Norsok MDSs with PPCoN’s additional requirements outlined in doc. 4368 shall
be applied for all modification projects (i.e. the Eko II MDS’ shall not be applied).
The Element Data Sheets (EDS) shall follow the respective piping specification (KE-spec.
or NORSOK spec.)
2.1.2
Piping Specifications
Several PPCoN ’P-specifications’ have been replaced by NORSOK PCSs. Some P-specs
need to be retained, due to special design features and/or materials in use (eg. ’monel’). A
cross-reference index for accepted specifications is given i Annex A. P-specifications are
listed in Annex B.
For 2/4X and 2/4J platform modifications, KE-P-T-001 ”Piping and Valve Material
Specification” shall be followed (see Section 2.1.3 Valve Specifications for selection of
VDS’). The same applies to piping systems on 2/4C and 2/4FTP installed as part of EkoII
project.
For 2/7E and piping systems modified during the Eldfisk EWI Project on the other Eldfisk
platforms the original PCSs (B875-AE-P-00014) shall apply. This document contains
basically “plain” Norsok PCSs but some project specific PCSs have been developed to
cover the “voids” in Norsok.
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In general all hydrocarbon (oil, gas, produced water and oily water) piping systems shall
be designed for sour service. For the Eko II PCSs the Service Class Summary defines
which piping systems are designed for sour service. For the PPCoN P-specs the
requirements to sour service are identified on the respective P-specs.
Design pressure and temperature
P-specs are developed for a certain set of service mediums and corresponding pressure
and temperature conditions. Some specifications are given intermediate pressure rating;
thus allowing the use of reduced schedule for piping. Some specification also have API 6A
designated rating.
PCS's are developed for a limited number of standard materials in all pressure classes.
No intermediate rating is available. Thus, special consideration to design pressure should
be made when tie-ins to existing systems are made. Also consider that the minimum
design temperature (MDT) may deviate from the “corresponding” Norsok PCS’s in some
cases.
Tie-in to existing systems
Existing systems have been designed to either NSDP or original design specifications.
NSDP is field-wide identical, while original specifications vary between platforms. For
tie-in of new systems to the existing systems, the following points must always be
checked:

design pressure

design temperature range

system test pressure

materials and their strength

pipe schedule, wall thickness and corrosion allowance

type of flanges, hub connections and gasket type in use

valve specifications and rating.
For more information see Annex E - Variations in design principles.
2.1.3
Valve Specifications
Valve specifications are listed in Annex C. For valve selections see NORSOK L-001,
Section 5 ”Valve Selection Manual”.
Valve Data Sheets identified within each relevant Piping Class Sheet as per KE-P-T-001
Piping and Valve Material Spesification (EKO II) and the PPCoN P-specs shall be
substituted by the corresponding NORSOK VDS. This includes all referenced Norsok
Standards and Datasheets. If similar datasheet does not exist within the NORSOK
Standard, the VDS within KE-P-T-001 or the valve data sheet listed in Annex C shall be
used.
2.1.4
Material Data Sheets
Independent of piping specification the NORSOK MDSs (M-630) and PPCoN doc. 4368
shall be employed.
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2.1.5
Tie in Points Between Existing and New Specifications
The existing piping specifications are either original platform specifications or Pspecifications (Annex B). New piping specifications will be those used by KE-P-T-001
(2/4X and 2/4J Platforms), NORSOK L-001 and B875-AE-P-00014 (2/7E and the piping
systems modified during the EWI Project on the Eldfisk platforms).
It is imperative that tie-ins between different piping specifications receive individual
consideration by a piping design engineer. See PP-P-TF-00001 for aspects to be
considered when tie ins between existing and new specifications shall be done.
2.1.6
Surface Protection and Colour Coding of Piping
Surface Protection of piping and equipment shall fullfill requirements given in doc. no.
4293 ”Surface Preparation and Protective Coating.
All pipework shall be color coded in accordance with the service. (Based on ISO Standard
R-508)
Basic identification color(s) and their meaning (except EkoX and EkoJ):
Red with white arrow
Red with yellow arrow
Red with blue arrow
Green with blue arrow
Green with white arrow
Silver-Grey with white arrow
Brown with white arrow
Yellow-ochre with white arrow
Violet with white arrow
Light blue with white arrow
Black with white arrow
- Fire Water
- Foam/dry chemical
- CO2/Inergen/gas extinguishing systems
- Potable water
- Raw or salt water in liquid state
- Steam
- All combustible oils
- All gases (except air or liquefied gases)
- Acids or alkalis
- Air
- Any other liquids
Color bands on piping shall be at least 15 cm in width. The arrow incorporated into band
shall indicate of flow. The pipeline content shall be labelled in black on the arrow.
Exceptions:
All valves for fire water service shall be painted red.
If the transported material is poisonous or would cause chemical burns upon contact with
skin an additional band (at least 15 cm in width) with yellow and black diagonal stripes
shall be placed in conjunction with the identification marking.
These markings shall be installed at wall and deck penetrations, on both sides of valves at
service connection and at pipeline junctions. Pipelines between platforms shall be labelled
at each end of pipe bridge and once in the middle. Additional markings may be installed
as desired for operator convenience.
Pipework on EkoX and EkoJ shall be colour marked in accordance with KE-P-T-046
”Piping Colour Coding and Marking”.
NB! Colour coding on stainless steel (316, super duplex, etc.) shall be of a stand off sign
type with minimal contact with the pipe. Plastic sheets wrapped around the pipe is not
acceptable as water and dirt are trapped and could cause corrosion/cracking.
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2.1.7
Use of Dissimilar Materials
The use of metals with diffferences in galvanic potential may require the use of insulation
spools. Reference is made to TCD 2 4650 ”Material Selections” for requirements
regarding insulation spools.
2.1.8
Design Requirement Selection
Projects may vary in size and complexity. The following definitions of project category
shall be basis for selection of design standards and specifications. See below.
2.1.9
Modification project
The piping part of the project is a modification of an existing system. The project may
include new piping, new mechanical or process equipment. New routing and layout may
be included, but only as replacement of existing lines. New dimensions for piping, based
on changes in plant capacity may also be a part of such a project.
Example: Replacement of an old pump, including new suct./disch. piping. Changing out a
corroded production flowline. Reduce diameter of a pipe system to maintain a minimum
flow velocity requirement.
Piping design requirement:
All modification category projects shall be executed following this document . See 2.1.2
Piping Specifications. This to obtain interchangeability of components, equal hub types,
flange facings, gasket and bolt materials. This will result in increased flexibility on
component and reduced spare stocking for PPCoN.
2.1.10
Extension project
The project scope will extend an existing system to new modules/areas, or extend
capacity by duplication of existing lines/trains. This may also include increased size of
main distribution manifolds and replacement of equipment by a new unit with different
capacity.
Example: Extension of a fire water system to cover new areas, or to increase capacity in a
certain area. Installing one (or several) new gas lift lines to a production platform already
having such equipment on some wells.
Piping design requirement:
Extensions to existing systems, where the majority of new piping are in the same size,
pressure class and material type as already used on the subject system shall follow
Section 2.1.2 Piping Specifications.
Extensions to existing systems where the majority of the new piping is of other size,
pressure class or material type than the existing part of the system shall follow NORSOK
Piping Design Requirements, as described in Section 2.1.1 Introduction. This to fully
utilise the NORSOK effect on design, fabrication and testing of components and systems.
2.1.11
New system installation project
A new system is added to the existing facility. The system tie-ins to existing pipework may
typically be tie-in to utility supplies, tie-in to cooling water main distribution, tie-in to
existing process systems etc.
Example: Installation of a complete gas lift unit on an existing production platform.
Installation of a new chemical injection system to an existing production train.
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Piping design requirement:
All new system installation category projects shall follow NORSOK Piping Design
Requirements, as described in Section 2.1.1 Introduction.
This to obtain the NORSOK effect regarding standardisation, as well as simplified
functional oriented requirements on design, fabrication and testing.
2.2
Flanges and Fittings on P-Spec’s
2.2.1
Nipolet
A nipolet is a reinforced branch fitting not more than 2” NB, 12 inches or less in length,
that eliminates the branch combination of nipple, ’o’let and one weld. All nipolets shall be
stamped with schedule, type of material and trademark.
2.2.2
Screwed Pipe Plugs
Screwed Pipe Plugs shall be solid and long enough to extend through insulation, minimum
2” long (including thread length). ”Solid” shall be stamped on the plug (not engraved).
2.2.3
Flat Faced Cast Iron Flanged Fittings
Whenever Flat Faced Cast Iron Flanged Fittings are used in utility piping the steel mating
flange shall be flat face and full face gaskets shall be used. Flanges shall be flat face
where connected to flat face pumps, turbines, compressors or other equipment nozzles.
2.2.4
Screwed Fittings
Screwed Fittings shall be threaded NPT (ANSI B1.20.1 General Purpose Pipe Threads).
2.2.5
Access under Pressure Fittings
Access under Pressure Fittings shall comply with the requirements of the respective Pspec and be of the Cosasco FLARWELD body type or similar. Assembly type will be solid
plug with a heavy protective cover withot a hole.
2.2.6
Slip Blinds and Spacers
All blinds shall follow ASME B16.5 pressure rating. Blinds shall have a minimum thickness
according to ASME B31.3, sect. 304.5.3, formula (15). Guidelines are given in Annex D
(TT-12-01 ”Slip Blinds and Start up Strainers”) for dimension of blinds in existing systems
designed in accordanse with P-specs. Slip blinds for RF flanges shall have flat face. Slip
blinds for RTJ flanges shall have RTJ facing.
2.2.7
Branch Connections
These shall normally comply with the relevant pipe specification’s table of header-tobranch requirements. Where exceptions are necessary, flanged fittings, branch fittings,
extrusions or tees of proper wall thickness are permitted . This includes the use of one
piece flanged forged branch fittings.
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2.2.8
Bushings
Bushings may only be specified after PPCoN approval, for use on non-hydrocarbon
service below 300 psig design pressure. The use of bushings should then be kept to a
minimum, and may only be considered where there is limited space or where other
methods of change in pipe diameter are impractical.
The change in pipe size must be two or more nominal diameters e.g., 1” to ½” ( for
structural strenght).
2.3
Bolting
2.3.1
Threads
Bolting threads for alloy steel studs shall be made to ASME B1.20.1 and in accordance
with ANSI B16.5 clause 6.9.5 (i.e., Coarse thread series for 1 inch dia. and smaller; 8
thread series for 1-1/8 inch dia. and larger).
2.3.2
Lengths
Bolt lengths shall be in accordance with ANSI B 16.5.
2.3.3
Bolt Tightening
Controlled Bolt Tightening comprises both manually torque, hydraulic bolt torque and
hydraulic bolt tensioning, and shall be applied to all ranges of bolted flange connections.
For bolt diameters 1” and larger, hydraulic bolt tightening is required. Both torque and
tension principles are defined as hydraulic bolt tightening.
Bolting and calculation of required bolt stress values shall be in accordance to DIN 2505,
with the additional requirements set in NORSOK L-CR-004 and the bolting procedures
contained in ”PPCoN’s Doc.no. 2950. L-CR-004 does not apply for GRP piping systems
and wellhead equipment. These issues are specially addressed in the PPCoN Doc.no.
2950.
2.4
Special Applications
2.4.1
Fire Water System
Technical requirements for design is given in PP-F-TX-00001 ”Fire Pumps and Mains,
Deluge and Sprinkler Systems”. A fire water system shall be designed in accordance with
NFPA standards unless otherwise provided in project premises or contract documents.
2.4.2
Erosion Spools for Cu-Ni Pipework
Rapid erosion can take place downstream of throttling valves due to high velocity
seawater impinging on the Cu-Ni line. To combat this, a SS spool (to Norsok PCS AD30)
shall be installed downstream of the subject valve. Spool length shall be min. 3x NB. The
erosion spool shall further be insulated from the CuNi pipe at the extreme downstream
flange (not the valve end) for galvanic corrosion purposes. See reference in Section 2.1.7
Use of Dissimilar Materials.
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2.4.3
Vendor Package Design
If vendor see benefits on cost and technical solutions for PPCoN, then package design may
follow the vendor's in-house specifications. However, before vendor's in-house specifications
can be used PPCoN's piping engineer (TAG-piping ) approval must be obtained.
If vendor is unable to use proper in-house specifications for piping inside the package,
then design shall be to the same pipe specifications as used for the rest of the system.
See Section 2.1.1 Introduction.
2.5
L-002: Piping Design, Layout and Stress Analysis
For steel piping, NORSOK standard L-002 shall apply, with the following exceptions:
2.5.1
Numbering Systems
The PPCoN Engineering Numbering System (PENS), Doc. No. 2169 manual shall apply.
2.5.2
Valves Accessibility and Installation
Normally, valves shall be installed with the stem located above the horisontal plane
through the valve centerline. Valve stem orientation shall be shown on both piping plans
and piping isometrics. Butterfly valves of 12 inch nominal bore and greater shall be
installed with the stem horizontal, where possible. Turbulance/vibration problems may
overrule this criterion (e.g.: close to a vertical bend valve stem to be vertical).
2.5.3
Sample Points
Access under Pressure Fittings shall comply with the requirements of the respective Pspec and be of the Cosasco FLARWELD body type or similar. Assembly type will be solid
plug with a heavy protective cover without a hole.
2.5.4
Equipment Piping
General
When new piping is to be connected to old equipment, the maximum allowable dead and
operating loads as specified in R-001 do not automaticly apply. A verification of load limits
shall be performed.
2.5.5
Fire/Explosion Protection
For modification projects on existing facilities, the accidental load requirements will be
given by PPCoN.
2.5.6
Fittings
L-002 does not apply. See Section 2.2 Flanges and Fittings on P-Spec’s in this document.
2.5.7
General
PPCoN responsible piping / valve TAG-engineer shall be consulted prior to any change to
pipework and valves classed as ”critical”, as defined in Critical Line List for the installation
and / or NORSOK L-002, section 5.2.
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All engineering and modification work performed on piping systems termed ”critical” by the
Critical Line list and / or L-002, section 5.2 shall be checked by a piping stress-engineer
and have independent design verification. The independent verification shall be performed
in parallel with the engineering work. The extent and degree of independence of the
verification shall be agreed with the PPCoN responsible TAG-engineer at start up of the
modification project.
2.5.8
Loads from Piping System on Equipment
Allowable loads on existing equipment shall not be above limits set by the equipment
vendor.
For flowlines from X-mas tree to manifold, the following movements of X-mas tree relative
to platform shall be used as design values when pipe flexibility is established. The
horizontal X–mast tree movement is caused by wave action and the fatigue effect shall be
investigated.
Platforms
Horisontal Movement, Vertical Deflection,
any Direction
Upwards
Vertical Deflection,
Downwards
2/4A, B, C
25 mm
50 mm
-50 mm
2/4 E
25 mm
50 mm
-25 mm
2/7 A, B, D 1) 25 mm
50 mm
-25 mm
2/4 K, W
25 mm
25 mm
-75 mm
2/4 X
25 mm
100 mm
-50mm
...
Table 2: X-mas tree movements relative to platform
1)
2.5.9
For water injection flowlines the X-mas tree movements shall be as per for 2/4K,W.
Deck and Wall Penetrations
Piping penetrations through deck or wall shall be equipped with sleeves that give a
minimum clearence of 50mm between pipe and sleeve.
2.6
Layout and Stress Analysis for GRP Piping
2.6.1
General
For GRP piping, NORSOK L-002 does not apply. See M-CR-621.
2.6.2
Layout
System layout must prevent overstrain. Pipe displacement must be controlled by routing
and expansion loops permitting angular, rotational and/or axial movements. Expansion
joints shall not be used as far as possible.
2.6.3
Stress Analysis
Stress analysis shall follow requirements given in the UKOOA standard, Part 3, Section 6:
”Structural Design”. Material properties, flexibilty factors and stress intensification factors
shall be based on vendor data and formulas given in BS 7159.
For pipe specifications P154GA & P154GW the given wall thickness are minimum values
based on pressure calculations according to ASTM D2992, procedure B (static). Thus, the
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combined effects of hydrostatic loads, slugging, temperature variations, support spans
and reaction forces may result in a requirement for an increased wall thickness.
2.7
Supporting
Standard support details for all modification projects shall be as defined in KE-P-T-500
”Pipe support Standard Details” and KE-P-P-500 ”Pipe Support Design Procedure”.
GRP piping shall be supported according to the pipe vendors engineering guidelines.
Support design shall allow for expansion, contraction and deflection resulting from
pressurization, temperature variations, slugging (water hammer) and weight of the pipe
content. Special attention shall be given to proper supporting of metal valves and other
mechanical equipment installed in the system.
2.8
Demolition
2.8.1
Dead Flow Sections
If changes are made to existing pipework that result in a ”dead flow” section of line (and
there is no forseeable use for that section) then it shall be removed.
2.8.2
Redundant Sections
If changes are made to existing pipework that result in redundant disconnected sections of
line, then these shall be removed.
Please note: For Ekofisk platforms with limited lifetime an acceptable alternative to
removal will be to blind off and scrap-in-place.
See document no. 2805 ”Retningslinjer for utstyr som settes permanent ut av drift”.
2.9
L-CR-003 : Piping Details
NORSOK standard L-CR-003 shall apply with the following exceptions:
2.9.1
5.1 General
When NORSOK PCSs are used, the Piping Details in L-CR-003 shall apply. If original Pspecifications are used, the Piping Details shall be used as guidelines and modified to suit
the P-specifications with respect to flange facing etc.
2.9.2
Annex A Typical Drawings
Piping Detail (PD) 129 ”Typical utility station concept” does not apply. Modifications shall
be based on existing lay-out.
2.10
L-CR-004 : Piping Fabrication, Installation Flushing and Testing
NORSOK standard L-CR-004 shall apply with the following exceptions:
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2.10.1
12 System Colour Coding of Piping
Colour coding of piping system shall be in accordance with Section 2.1.6 Surface
Protection and Colour Coding of Piping for all platforms except 2/4X and 2/4J, which shall
be colour coded according to KE-P-T-046.
2.10.2
Annex A - Alternative Test Methods
A2 General: Prior to any alternative testing taking place, acceptance shall be obtained as
outlined in PPCoN doc 4924.
2.10.3
CS Production Flowlines
All welding on CS production flowlines shall be Post Weld Heat Treated (PWHT)
according to PP-K-TF-00005.
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ANNEX A
Cross Reference Table for Pipe Specifications
Click here to see all specifications in Annex A Rev 2000.
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ANNEX B
Pipe Specifications
Click here to see all specifications in 4583 Annex B
Pipe specifications contained in this annex shall only be used in modification and
extension work on the Ekofisk Field and all Outlying platforms installed prior to 1996. Pipe
specifications have individual revision no’s. Latest revision is indicated in table B. 1 below.
All technical notes given on the individual pipe specification shall be followed for design
and fabrication.
Service codes and notes for each specification are given in Annex A.
For valve specifications and “Notes for valve requisitioning”, see Annex C.
Pipe Specification
Revison
Date
Revised items
P153
P
05.2000
MDS references, bolt materials
P154
K
05.2000
Gen.rev.
P154GA
E
05.2000
Gen.rev.bolt materials
P154GW
E
05.2000
Gen.rev.bolt materials
P155
M
05.2000
MDS references, bolt materials
P164
G
05.2000
MDS references, bolt materials, rubber lining
added as alternative.
P174
O
05.2000
Certification req’s., bolt materials, new mat’l for
small fittings, brazing replaced by socket welding,
flange surface prot. changed to galv.
P175
L
05.2000
MDS references, bolt materials
P197
K
05.2000
Flange surface prot. changed to galv., bolt
materials
P399
L
05.2000
Flange surface prot. changed to galv., bolt
materials
P601L
E
05.2000
MDS references, bolt materials
P602L
F
05.2000
MDS references, bolt materials
P604
L
05.2000
Flange surface prot. changed to galv., bolt
materials
P903
L
05.2000
Flange surface prot. changed to galv.
P905L
Q
05.2000
Gen. Rev.
P1501L
F
05.2000
MDS references, unions removed
P2501L
E
05.2000
MDS references, unions removed
P2502
M
05.2000
MDS references
P3005
G
05.2000
MDS references, seal ring material changed to ss
P5001L
E
05.2000
MDS references, seal ring material changed to ss
P10001
M
05.2000
Gen.rev.
P10003L
R
05.2000
Gen.rev.
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ANNEX C
Valve Specifications
Ball Valves
Click here to see all specifications in BA-7SL-BA-1000 and BA-1007-PHBA-27L.
Valve Specification Index
Valve data sheet
Rev.
Date
BA-7SL
C
6/2000
BA-8SL
C
6/2000
BA-16SL
C
6/2000
BA-17S
C
6/2000
BA-59SL
C
6/2000
BA-82SL
C
6/2000
BA-95SL
C
6/2000
BA-96SL
C
6/2000
BA-155SL
C
6/2000
BA-1000
C
6/2000
BA-1007
F
6/2000
BA-3025L
C
6/2000
BA-4000
G
6/2000
BA-4001
F
6/2000
BA-4002
D
6/2000
BA-5006
F
6/2000
BA-7000L
C
6/2000
BA-7001L
C
6/2000
PHBA-13S
C
6/2000
PHBA-14S
C
6/2000
PHBA-15S
C
6/2000
PHBA-25L
C
6/2000
PHBA-26L
C
6/2000
PHBA-27L
C
6/2000
Remarks
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Butterfly Valves
Click here to see all specifications in BF-2S-PHBF-3S.
Valve Specification Index
Valve Data Sheet
Rev.
Date
BF-2S
G
6/2000
BF-1000
G
6/2000
BF-3007
G
6/2000
PHBF-3S
D
6/2000
Remarks
Gate Valves
Click here to see all specifications in GA-9S-PHGA-13L.
Valve Specification Index
Valve Data Sheet
Rev.
Date
GA-9S
E
6/2000
GA-49S
F
6/2000
GA-49SL
F
6/2000
GA-1003S
F
6/2000
GA-1004S
F
6/2000
GA-1005S
F
6/2000
GA-1006S
F
6/2000
GA-2000
E
6/2000
PHGA-2S
H
6/2000
PHGA-5L
C
6/2000
PHGA-11 L
C
6/2000
PHGA-13L
C
6/2000
Remarks
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Globe Valves
Click here to see all specifications in GL-20SL-GL3004 and GL-3005-PHGL-11.
Valve Specification Index
Valve Data Sheet
Rev.
Date
GL-20SL
C
6/2000
GL-73SL
C
6/2000
GL-171S
F
6/2000
GL-171SL
F
6/2000
GL-1000
F
6/2000
GL-1001
E
6/2000
GL-1001S
F
6/2000
GL-1004
F
6/2000
GL-1004S
E
6/2000
GL-1005
F
6/2000
GL-1005S
E
6/2000
GL-1006S
E
6/2000
GL-1007S
E
6/2000
GL-3004
F
6/2000
GL-3005
F
6/2000
GL-4001
D
6/2000
GL-7000L
C
6/2000
PHGL-1S
E
6/2000
PHGL-2SL
C
6/2000
PHGL-11L
N
6/2000
Remarks
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Check Valves
Click here to see all specifications in CK-7S-CK-1001, CK-1002-CK-3006 and
CK-3011L-PHCK-19L.
Valve Specification Index
Valve Data Sheet
Rev.
Date
CK-7S
F
6/2000
CK-95SL
C
6/2000
CK-218SL
C
6/2000
CK-219SL
C
6/2000
CK-299SL
C
6/2000
CK-301SL
C
6/2000
CK-302SL
C
6/2000
CK-1000
E
6/2000
CK-1001
G
6/2000
CK-1002
E
6/2000
CK-1003S
F
6/2000
CK-1004
F
6/2000
CK-1004S
E
6/2000
CK-1005
H
6/2000
CK-1005S
E
6/2000
CK-1008
F
6/2000
CK-3002
F
6/2000
CK-3003
F
6/2000
CK-3006
F
6/2000
CK-3011L
C
6/2000
CK-3013
E
6/2000
CK-3026L
C
6/2000
CK-3027L
C
6/2000
CK-3032L
C
6/2000
CK-5007
F
6/2000
CK-7000L
C
6/2000
CK-7001L
C
6/2000
PHCK-15L
C
6/2000
PHCK-16L
C
6/2000
PHCK-17L
C
6/2000
PHCK-19L
C
6/2000
Remarks
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Plug Valves
Click here to see all specifications in PL-3000-PL-4016L.
Valve Specification Index
Valve Data Sheet
Rev.
Date
PL-3000
F
6/2000
PL-3001
F
6/2000
PL-4002
C
6/2000
PL-4003
C
6/2000
PL-4006
C
6/2000
PL-4007L
C
6/2000
PL-4008
C
6/2000
PL-4011
C
6/2000
PL-4012L
C
6/2000
PL-4015L
C
6/2000
PL-4016L
C
6/2000
Remarks
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PPCoN Additional Technical Requirements
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Notes for Valve Requisitioning
C1 Scope
These notes cover the requisitioning requirements for all manual valves. (For further
design and installation information refer to Secion 2.4 Special Applications).
C2 Substitutions
Valve details shall comply with the relevant PPCoN Valve Spec Sheets in this Annex (or in
limited instances the “43, 87 or 91 -series” specification sheet, see C3). No substitutions
may be made by the Vendor without written agreement from PPCoN.
C3 Non Standard Valves
Manual Valves that do not generally comply with the PPCoN Valve Specification Sheets
require specific company approval. Any such valve shall be regarded as a “Piping
Speciality” and given a ‘87’or’61 -‘ series number. This number is to be shown on the
mechanical flowsheet.
Actuated valves (remote operated, non-manual) are purchased as Instrument items
category’43’ or’91’for the complete assembly. Separate Instrument specifications are
prepared for these actuated valves. In the case of the valve part being identical to a
standard manual valve (without wrench etc.) in this appendix, the relevant standard valve
specification is to be included in the Instrument specification.
C4 Valve Material
Unless specifically unrestricted on the PPCoN valve specification sheet, the valve material
carbon content for carbon maganese steel valves shall not exceed 0.22% (ladle analysis).
If material with 0.22% carbon max. is specified but cannot be obtained, then the use of
higher carbon contents shall be subject to approval by the PPCoN Metallurgist.
Note: the 0.22% carbon content limit does not apply for non welded components.
For hydro-carbon and produced water service: Where the valve specifications show valve
components in UNS N06600 and N06625, they shall be supplied in the annealed
condition or supplied with certification showing that the supplied parts comply with NACE
MR0175 requirements. Other UNS N066xx or N077xx alloys are only acceptable with
certification showing that the supplied parts comply with NACE MR01 75 requirements.
C5 Valve Dimensions
All flanged valves shall have ASME B 16.5 flange and ASME B 16.10 end to end
dimensions where applicable. Butterfly valves that meet API Standard 609 for end to end
dimensions are preferred. When replacing existing valves particular attention should be
given to checking existing/replacement valve lengths to ensure the valves can be easily
exchanged.
C6 Drain Bosses/Plugs
Unless specified on the Valve Spec. Sheet, drain bosses on valves shall be supplied
untapped. When plugs are specified these shall be solid, NPT threaded and be
galvanically compatible and of similar strength as the valve body material.
C7 Ball Valve Seat Injection Points
On ball valves 300 lb. ANSI and above, 17 n.b. and greater, seat injection points for
grease/sealant shall be fitted as follows;

Valve size 17 n.b. to 27 n.b., a minimum of two injection points equally spaced
diametrically at the seat in each end of the ball valve (ie. minimum four total).
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
Valve size 24” n.b. and greater, a minimum of four injection points equally spaced
diametrically at the seat in each end of the ball valve (ie. minimum eight total).
All grease/seal ant fittings exposed to direct or indirect line pressure shall be as follows:

UNS G41400 (AISI type 4140) material in quenched and tempered condition, when
used with carbon steel valves. Fitting material for non-carbon steel valves must be
galvanically compatible with the valve material, see reference given in C6.

Style with heaviest wall thickness.
1-/2”, 3/8” and ¼” NPT (Use largest size possible compatible with valve size/design).

Blow out proof buttonhead fittings to be used.
C8 Ball Valve Body Vent/Drain Valves
On ball valves 300 lb ANSI and above, 12” n.b. and greater, body vent/drain valves shall
be fitted as follows;

Valve size 17 n.b. to 27 n.b., a minimum of one combination vent/drain valve.

Valve size 24” n.b. and greater, a minimum of one body drain valve installed on the
lowest point and one body vent valve installed on the highest point of the valve body.

Refer to the relevant PPCoN Pipe spec. to determine the PPCoN Valve Spec. to be
used for the vent/drain valves. Where size of the main ball valve allows, a flanged
drain/vent valve studded directly to the main ball valve is preferred for mechanical
strength. The discharge end of the vent/drain valve shall be supplied with a blind
flange or NPT plug as relevant.
C9 Aluminium
This material will not be allowed in any part of the valve or valve accessories.
C10 Testing
Material: Notch_Toughness Tests: Material shall meet Charpy V-notch impact (CVN) test
minimum value requirements stated on the applicable MDS.
Welding Notch Toughness Tests: PPCoN shall review and accept the welding procedures
and supporting qualification records for all valve fabrication welding. Welding shall meet
CVN test minimum value requirements stated in Norok M-601.
Hardness Testing: Pressure retaining parts on valves shall be subject to the hardness
requirements in NACE MR0175 when called for on the relevant valve specification sheet.
Pressure Tests: Generally valves shall be pressure tested in accordance with BS 6755
part 1 or API 598. After hydrostatic tests are carried out on assembled valves, test
packings and all traces of test media shall be removed from the internal parts and the
packings (if any) replaced with unused dry packings.
Operational Tests: All limit stops and open/closed indicators (whether wrench, handwheel
or gearbox operation) shall be properly set and checked by the Vendor prior to delivery.
C11 Valve Marking
All valves: Marking shall be according to MSS-SP-25. Additionally the following marking
shall be incorporated:

Manufacturer’s serial no.

VDS identification (eg. GTAC 10R)
The marking shall be made on a stainless steel identification plate permanently fixed to
the valve. Plate thickness shall be of minimum 0.4 mm.
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Marking directly onto the valve body shall be excecuted with low stress stamps. Marking
on weld bevels, flange faces or sufaces that will be hidden following fabrication, assembly
or installation, is not allowed.
Highly visible flow direction arrows shall be permanently marked on all valves having a
required or preferred flow direction (eg: check valves, some ball and butterfly valves etc.)
C12 Valve Exterior Finish
The exterior of corrosion resistant valves (eg: stainless steel, monel, titanium,
aluminium-bronze, 25Cr duplex ss, etc.) shall not be painted.
The exterior of carbon steel valves shall be surface treated according to Norsok M-501,
system 9. The color shall be white unless otherwise specified.
Machined surfaces of c-steel including gaskets seating surfaces of flanges, threads, ends
prepared for welding etc., shall be sprayed or coated with a temporary protective coating.
The coating shall be generously applied and resistant to abrasion during handling and
shall be readily removable for assembly or welding. Regardless of material, all valve
stems (including threads) packing gland crevices and bonnet bolt areas shall be
generously coated as described herein.
C13 Nickel Plating
All electroless nickel plating (ENP) (specified for trim in some valve specifications) shall
comply with NORSOK L-001). PPCoN has several negative experiences with ENP
coatings and therefore the manufacturers are generally encouraged to propose alternative
base materials to avoid coatings or alternative coating systems (e.g. tungsten carbide,
stellite, etc.).
C14 Valve End Protection
Threaded end connections, “hub connectors” etc. and ends prepared for welding shall be
fitted with stout plastic cap protectors. Flanged ends shall be sealed at the flanges with
stout timber, metal or plastic waterproof covers bolted or taped on the flange. Hardboard
material is not acceptable.
C15 Packaging
Ball and Plug Valves shall be shipped and stored in the “open” position. Butterfly valves
shall be shipped and stored with the disc slightly open (in the liner/seat relaxed position).
All other valve types to be shipped and stored in the “closed” position unless otherwise
agreed between PPCoN and the Vendor.
The Vendors of valves are required to ensure that all materials, when delivered are
adequately protected against corrosion and mechanical damage. Protection shall be
suitable for a period of at least 2 years as packed and crated (or otherwise to a written
schedule of routine checks and rectification).
One set of documentation shall be supplied by the vendor in waterproof packing in the
crate/box with the valve(s). The documentation shall be for every valve (or group of valves
of similar type), as follows:

Installation, handling, operation and maintenance instructions.

Drawings showing construction, parts, materials etc.
When sufficiently detailed, catalogue information may suffice.
C16 Certification
The certification is grouped by PPCoN into type I, II and Ill. This grouping is based on
criticality (ascending order of criticality). The valve specification defines which certification
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type (I, II or III) is required. Any valve supplied without the required marking or
documentation will be subject to rejection.
Note that for all certification types, valves must be marked, tagged and stamped as
defined in C11 and be accompanied by copies of the pressure test certificates.
Otherwise the requirements for each certification type is as follows:
Type I Certification:
Corresponds to EN 10204 type 2.1. These valves have markings required by the
applicable standard such as Grade, size, heat no. code, manufacturers indentification,
and other required items. Any substitution to the component/material specified on the
valve specification (that has been agreed by PPCoN) shall become Type II certification.
Type II Certification:
Corresponds to EN 10204 type 3.1.B.
The production process, welding procedure specifications with procedure qualification
records, heat treatment, fire test certificate, and other relevant features, if not limited or
described by the specification, shall be included.
Type Ill Certification:
Corresponds to EN 10204 type 3.1.C.This certificate requires that testing of materials be
carried out under a PPCoN approved independent Third party’s supervision and must be
signed by them. All other requirements for a Type II Certificate apply.
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ANNEX D
Slip Blinds and Start Up Strainers
The following 19 pages are a scanned copy of TT-12-01 ”Slip Blinds and Start Up
Strainers” which shall be used as a guideline when the PPCoN P-specs. are applied.
When KE PCS’ or NORSOK PCS’ are applied the EDS’ in KE-P-T-001 and NORSOK L001 respectively shall be followed.
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ANNEX E
Variations In Design Principles
Some principal technical differences between NSDP/original design pipe specifications
and NORSOK are given herein. Other differences than those described may occur.
Flanges
PPCoN P-specs have RF flanges in the following pressure classes: 150, 300, 600.
P-specs have RTJ flanges in the following pressure classes: 900, 1500, 2500. Note:
P903, P2502 & P2510 and most original design specifications in cl.900 (eg. '901') also
use RF flanges.
Norsok PCS’ have RF flanges in the following pressure classes: 150 & 300. Norsok PCS’
have RTJ flanges in the following pressure classes: 600, 900, 1500 & 2500.
Gaskets
P-specs and Eko II specs with RF flanges generally use 3.2mm thick spiral wound
gaskets with outer ring and sometimes also centring ring. One exception is P301 L using
1.6mm flat gasket to ASME B16.21.
P-specs with RTJ flanges generally use octagonal soft iron rings. Exception is P3001
which use oval soft iron ring.
PCS's with RF flanges generally use 1.5mm flat gasket to ASME B16.21.
PCS's with RTJ flanges allow the use of both oval and octagonal rings in various material
qualities, see individual PCS's for details.
Hubs
P-specs with hub connections have other wall thickness than comparable PCS's. This
gives conflicting hub sizes, which prevent automatic interchangeability of high pressure
pipe specifications with clamped connections.
ASME class
1500
2500
P-spec
4GR34 (P1501)
4GR25 (P2501 L)
PCS
4GR31 (FC15)
4GR27 (GC15)
Table E. 1: Hubconnections 4 in. nom, bore
In addition, it should be noted that some platforms (eg. 2/4A, 2/4C, 2/4W, 2/7D and
others) do use clamp connectors not being interchangeable with 'Graylock'. For tie-ins to
existing systems, existing construction drawings must be reviewed.
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Nipples/fittings
P-specs generally prescribe the use of socket weld nipples. Threaded nipples are also
acceptable, but not recommended. Nipple schedule is XXS or 160. ASME B16.11 is
referred for dimensions.
PCS's do not allow the use of socket welded branches or nipples. Nipple schedule is 80,
160 or XXS, depending on pipe material and rating. ASME B16.9 is referred for butt
welded fittings. Threaded components are only acceptable in branches d/s of a butt
welded isolation valve.
Valve face to face dimensions
P-specs generally follow ASME B16.10 and API 6D for face to face dimensions for valves.
Butterfly valves have face to face dimensions according to API 609, table 1.
PCS's generally follow ASME B16.10 (or API 6D) for face to face dimensions for valves.
Butterfly valves have face to face dimensions to API 609, table 2 or BS5155.
Note: several existing PPCoN facilities have special valve face to face dimensions. For
correct dimensions, reference is made to PPCoN guideline: GL-4D-12-04.
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