Materials System Specification

04-SAMSS-055 17 July 2014

General Valve Requirements, ISO 10423 (API 6A)
Document Responsibility: Valves Standards Committee

Saudi Aramco DeskTop Standards

Table of Contents

1 Scope……………………………….……...…… 2
2 Conflicts and Deviations……………………… 2
3 References…………………………………….. 2
4 Abbreviations and Definitions………………... 5
5 Notes to Buyer………………………….……… 6
6 Vendor Evaluation Process………………….. 7
7 Vendor Responsibility………………………… 7
8 Drawing Approval……………………………… 8
9 General Requirements…………………….…. 9
10 Materials, Coatings and Welding…………... 12
11 Requirements for
TCC Metal Seated Valves……………..…... 13
12 Sealing………………………………………… 13
13 Connections and Fittings……………………. 14
14 Operator………………………………………. 16
15 Inspection, Examination and Testing……… 16
16 Painting and External Coating……………… 16
17 Marking……………………………………….. 16
18 Preparation for Shipping…………………….. 17

Appendix A – Vendor Technical Evaluation

Minimum Requirements………... 18
Appendix B – Past Supply History Template….. 20

Previous Issue: New Next Planned Update: 17 July 2019

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Primary contact: Meehan, Martin Finbar on +966-13-8809668

Copyright©Saudi Aramco 2014. All rights reserved.

Document Responsibility: Valves Standards Committee 04-SAMSS-055
Issue Date: 17 July 2014
Next Planned Update: 17 July 2019 General Valve Requirements, ISO 10423 (API 6A)

1 Scope

This material specification along with the purchase order defines general
requirements for ISO 10423 (API 6A) on/off valves and chokes classified under
04-SAMSS for onshore and offshore wet sour liquid, or, gaseous hydrocarbon
services with temperature ratings within the range of -50°F to +350°F (-46°C to
+180°C).

This specification is not applicable to valves classified under 34-SAMSS or

45-SAMSS.

2 Conflicts and Deviations

2.1 Any conflicts between this specification and other applicable Saudi Aramco
Materials System Specifications (SAMSS), Engineering Standards (SAES),
Standard Drawings (SASD), or industry standards, codes, and forms shall be
resolved in writing by the Company or Buyer representative through the
Valves Standards Committee Chairman (VSCC), Consulting Services
Department of Saudi Aramco, Dhahran.

2.2 Direct all requests to deviate from this specification in writing to the
Company or Buyer representative, who shall follow internal company
procedure SAEP-302 and forward such requests to the VSCC, Consulting
Services Department of Saudi Aramco, Dhahran.

2.3 VSCC, or his delegate, shall have the final say in resolving any dispute
relating to interpretation of this specification.

3 References

Material or equipment supplied to this specification shall comply with the latest
edition of the references listed below unless otherwise noted:

3.1 Saudi Aramco Documents

Saudi Aramco Engineering Procedure

SAEP-302 Instructions for Obtaining a Waiver of a
Mandatory Saudi Aramco Engineering
Requirement

Saudi Aramco Engineering Standards

SAES-A-206 Positive Material Identification
SAES-W-010 Welding Requirements for Pressure Vessels
SAES-W-014 Weld Overlays and Welding of Clad Materials

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Document Responsibility: Valves Standards Committee 04-SAMSS-055
Issue Date: 17 July 2014
Next Planned Update: 17 July 2019 General Valve Requirements, ISO 10423 (API 6A)

Saudi Aramco Materials System Specifications

04-SAMSS-003 Additional Requirements for Low Temperature
Valves
04-SAMSS-035 General Requirements for Valves
04-SAMSS-048 Valve Inspection and Testing
04-SAMSS-049 Inspection Testing Requirements, ISO 10423
(API 6A), Valves & Chokes
04-SAMSS-052 Ball Valves, Soft Seated, API 6A, up to 5000 psig
04-SAMSS-053 Lubricated Plug Valves, includes API 6A, up to
5000 psig
04-SAMSS-054 Choke valves, API 6A, up to 10000 psig
04-SAMSS-057 Gate Valves, ISO 10423 (API 6A), up to
15000 psig
04-SAMSS-058 Ball Valves, ISO 10423 (API 6A), up to
10000 psig
04-SAMSS-059 Twinball, ISO 10423 (API 6A), up to 10000 psig
04-SAMSS-062 Mono-Flange Valves, ISO 10423 (API 6A), up to
10000 psig
04-SAMSS-060 Swing Check Valves, ISO 10423 (API 6A), up to
15000 psig
04-SAMSS-061 Axial Check Valves, ISO 10423 (API 6A), up to
10000 psig
04-SAMSS-056 Testing Requirements, ISO 10423 (API 6A),
Valves & Chokes
06-SAMSS-001 Selection and Qualification of Elastomers
34-SAMSS-716 Pneumatic Actuators On-Off Service
34-SAMSS-717 Hydraulic Valve Actuators
34-SAMSS-718 Electric Motor Operated Valve Actuators

Saudi Aramco Inspection & Testing Requirements

IR-175-000003 Instructions and Explanation of Requirements
IR-175-043000 Valve Materials Certification Requirements
IR-175-043600 General Metallic and Non-Metallic Valves
IR-175-045600 API 6A 10000 psi Valves and Chokes

Saudi Aramco Forms and Data Sheets

6233-1-ENG Valve Data Sheet

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Document Responsibility: Valves Standards Committee 04-SAMSS-055
Issue Date: 17 July 2014
Next Planned Update: 17 July 2019 General Valve Requirements, ISO 10423 (API 6A)

American Petroleum Institute (API)

API 598 Valve Inspection and Testing
API 602 Steel Gate, Globe and Check Valves for Sizes
DN 100 and Smaller
API 6A Wellhead and Christmas Tree Equipment
API 6D Pipeline Valves (Gate, Plug, Ball, and Check
Valves)
API 6FA Fire Test for Valves

American Society of Mechanical Engineers (ASME)

ASME B1.1 Unified Inch Screw Threads
ASME B1.20.1 Pipe Threads, General Purpose (Inch)
ASME B16.11 Forged Fittings, Socket-Welding and Threaded
ASME B31.3 Process Piping
ASME B31.4 Pipeline Transportation Systems Liquid
Hydrocarbons and other Liquids
ASME B31.8 Gas Transmission and Distribution Piping
Systems
ASME SEC V Boiler and Pressure Vessel Code,
Non-Destructive Examination
ASME SEC VIII Boiler and Pressure Vessel Code, Rules for
Construction Pressure Vessels
ASME SEC IX Boiler and Pressure Vessel Code, Welding and
Brazing Qualification

Engineering and Equipment Materials Users' Association (EEMUA)

EEMUA 182 Integral Block and Bleed Manifolds for Direct
Connection to Pipework

International Organization for Standardization (ISO)

ISO 10204 Metallic Products - Type of Inspection
Documents
ISO 10423 Wellhead and Christmas Tree Equipment
ISO 10497 Testing of Valves - Fire Type Testing
Requirements
ISO 14313 Pipeline Valves (Gate, Plug, Ball, and Check
Valves)
ISO 15156 Materials for Use in H2S Containing
Environments in Oil & Gas Production

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Document Responsibility: Valves Standards Committee 04-SAMSS-055
Issue Date: 17 July 2014
Next Planned Update: 17 July 2019 General Valve Requirements, ISO 10423 (API 6A)

ISO 5208 Industrial Valves - Pressure Testing of Metallic

Valves
ISO 5210 Industrial Valves - Multi-Turn Valve Actuator
Attachments
ISO 5211 Industrial Valves - Part-Turn Actuator
Attachments
ISO 9000 Quality Systems - Model for Quality Assurance
Design, Development, Production,
Installation and Servicing
ISO 9001 Quality Management Systems - Requirements

Manufacturers Standardization Society

MSS SP-45 Bypass and Drain Connection Standard

4 Abbreviations and Definitions

Buyer’s Representative: Person acting on behalf of the Buyer, who may be from
the Engineering, Inspection, Purchasing, Standardization, or, User Organization

Company: Saudi Aramco

CSD: Company’s Consulting Services Department

Double-Block-and-Bleed valve (DBB) (reference ISO 14313:2007 Section 4.7):

single valve with two seating surfaces that, in the closed position, provides a seal
against pressure from both ends of the valve with a means of venting/bleeding the
cavity between the seating surfaces.
Note: This valve does not provide positive double isolation when only one side is under
pressure. See double isolation-and-bleed valve.

Double-Isolation-and-Bleed valve (DIB) (reference ISO 14313:2007 Section 4.8):

single valve with two seating surfaces, each of which, in the closed position,
provides a seal against pressure from a single source, with a means of
venting/bleeding the cavity between the seating surfaces.
Note: This feature can be provided in one direction or in both directions.

May: One possible course of action

PR: Performance Requirement (ref: ISO 10423)

PSL: Product Specification Level (ref: ISO 10423)

RVL: Regulated Vendors List

Shall: Indicates a requirement

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Document Responsibility: Valves Standards Committee 04-SAMSS-055
Issue Date: 17 July 2014
Next Planned Update: 17 July 2019 General Valve Requirements, ISO 10423 (API 6A)

Should: Indicates a preferred recommendation

SMG: Company’s SAP Materials Group

Vendor: responsible for the supply of valves in accordance with this specification

Valves Standards Committee Chairman (VSCC): The Saudi Aramco assigned

Engineering Specialist from Consulting Services Department, Dhahran, who
originates and is responsible for all Class 04 valve technical specifications and
standards or his delegated representative

9COM: Company commodity code

5 Notes to Buyer

5.1 Where a valve requirement falls outside the scope of the existing company
9COM’s the Buyer's Representative shall highlight this to the VSCC and the
Materials Supply department in order to allow sufficient time for the
evaluation and establishment of a 9COM and RVL.

5.2 No Purchase Order shall be placed on any vendor unless the vendor has
undergone and passed the technical evaluation in Section 6, as a minimum.

5.3 Buyer's Representative shall fill out Form 6233-1-ENG for each non-SMG
line item and attach it to the Purchase Requisition/Purchase Order.
All information on the datasheet shall be completed in order to fully define
the valve requirements. The requirements shall be elaborated upon in the
notes section in order to fully define requirements. Actuated valves should
be complemented by an actuator datasheet. Actuator requirements are
outside the scope of this specification.

5.4 The following minimum information shall be considered and the specific
requirements and details shall be specified and included in the purchase
requisition/purchase order:
a. Intended service, flow medium, flow composition, contaminants,
particulates, injected chemicals, test medium, etc., – Specify applicable
details
b. Valve type, size, pressure class, design temperature range, operating
conditions, PSL (reference Section 9.9 and 04-SAMSS-056 sections 6.10,
6.11 and 6.12) – Specify requirements and any higher PSL requirements
c. End connection type, size, and mating bore sizes – Specify requirement
d. Full bore, or, reduced bore, and details as applicable – Specify
requirement
e. API 6A material class, material for body, trim, stem, seat, fittings,
bolting, seals – Specify requirement
f. Seat features and configuration – Specify requirement

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Document Responsibility: Valves Standards Committee 04-SAMSS-055
Issue Date: 17 July 2014
Next Planned Update: 17 July 2019 General Valve Requirements, ISO 10423 (API 6A)

g. Seating type, e.g., metal, soft – Specify requirement

h. Seat leakage acceptance criteria – Specify if more stringent criteria is
required for the specific application compared to 04-SAMSS-056
Section 6.16
i. Low pressure pneumatic seat testing – Specify requirement where lower
pressure seat testing is required compared to ISO 10423 requirements
j. Face-to-face dimensions – Specify if any special dimensions are required
and where valve type is outside ISO 10423 sizes reference Section 9.22
k. Operator/actuator style – Specify requirement
l. Stroking Speed/Cycles – Specify any special requirements
m. Drain, Vent and Sealant Injection – Specify requirement
n. Orientation of installed valve – Specify requirement if other than bore
horizontal (Stem vertical upwards)
o. Lifting requirements – Specify any special requirements or
considerations
p. Valve support, ribs, legs – Specify requirement
q. Locking device requirements – Specify requirement
r. External coating requirement – Specify requirement
s. External loading considerations – Specify any requirements; e.g., tension,
compression, bending in all planes, etc.
Note: A DBB valve per ISO 14313 definition in Section 4.4 is not equivalent to
DB&B definition in GI-0006.012 Section 8.3.1.

6 Vendor Evaluation Process

6.1 Vendors shall meet the requirements listed in Appendix A and shall provide
the information specified as a minimum.

6.2 Potential vendors shall be required to undergo a plant survey and a technical
evaluation of their products in order to establish the vendor’s suitability and
capability to supply equipment to meet industry standards, company
specifications, standards and requirements. The assessment shall be
performed by the VSCC, or his delegated representative.

7 Vendor Responsibility

7.1 Company technical assessment, company drawing approval and/or

compliance with the applicable 04-SAMSS does not relieve the vendor of
full responsibility to supply equipment of proper design to meet the specified
environmental, application, service, operating conditions and the applicable
industry standards.

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Document Responsibility: Valves Standards Committee 04-SAMSS-055
Issue Date: 17 July 2014
Next Planned Update: 17 July 2019 General Valve Requirements, ISO 10423 (API 6A)

7.2 It is the vendor's responsibility to ensure that all sub-suppliers comply with
the applicable industry and company specifications, standards and
requirements.

7.3 Vendor shall advise company if there is any information missing from the
Purchase Requisition which the vendor requires in order to establish the
valve requirements and suitability for the intended service and application.

8 Drawing Approval

8.1 Vendor shall submit detailed drawings of the proposed valve to company
prior to starting to manufacture the valve. When requested per 8.2 company
drawing approval shall be required before vendor starts valve manufacture.
The drawing shall reflect the proposed supply and shall include the below as
a minimum:
a) List Saudi Aramco 04-SAMSS and industry codes
b) ISO 10423 material classification, temperature rating, PR, PSL
c) Bill of materials with part description and specific material grade
d) Welding, hard facing, overlay, WPS, PQR
e) Overlaid surfaces and any surfaces left in an un-machined condition
f) Coating details or surface treatment on parts, as applicable
g) Seat detail, i.e. type, material, final coating thickness
h) Hard face coating and final thickness
i) Seal arrangements, type and materials
j) Hydrostatic and Gas shell and seat test pressures, as applicable
k) Seat leakage acceptance rate
l) Drain, vent, fittings, valve(s) arrangement, when applicable
m) Sealant injection fittings and arrangement, when applicable
n) Clearances required for maintenance and removal of equipment
o) Weight of individual valve, actuator and the combined total weight
p) Lifting points, center of gravity
q) Saddles/legs, locking devices, as applicable
r) Overall dimensions (inches) including dimensions for maintenance and
removal

8.2 When requested by company, the vendor shall obtain formal drawing
approval through the Buyer’s Representative prior to starting to manufacture
the valve:

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Document Responsibility: Valves Standards Committee 04-SAMSS-055
Issue Date: 17 July 2014
Next Planned Update: 17 July 2019 General Valve Requirements, ISO 10423 (API 6A)

a) If the purchase is made through the SMG, approval authority is the Saudi
Aramco Material Standardization and Projects & Strategic Purchasing
Department.
b) If the purchase is made through the Saudi Aramco Direct Charge system,
the approval authority is the organization originating the requisition.
c) If the purchase is made through a Contractor to Saudi Aramco, refer to
the contract for the appropriate approval authority.

8.3 Valves shall be manufactured in accordance with the submitted drawing. If

any subsequent change is required the revised drawing shall be resubmitted
per sections 8.1, and 8.2 when requested.

8.4 The vendor shall provide the company any other information that is required
to verify that the valve is in full compliance with company requirements,
specifications, standards and industry codes.

9 General Requirements

9.1 Valve assemblies or subassemblies shall not be sub-ordered from any other
sources or facilities and shall be fully assembled and tested in the
manufacturing facility approved by company for the applicable 9COM.

9.2 Vendors shall not label or otherwise present other manufacturer’s product as
vendor’s product.

9.3 Valves which will be installed in company facilities which are not supplied
directly to company, or, which are supplied as part of skid packages shall be
subject to company standards, specifications, requirements and RVL.

9.4 Valves and valve parts shall be new, free of all rust, dirt, scale, and other
foreign material.

9.5 Valves shall be highly reliable designs which have been proven in similar
environments, service conditions and applications. The design life of the
valves shall be 30 years unless otherwise specified.

9.6 Valves shall be designed and constructed for installation offshore or onshore
and shall be suitable for hot desert climates and/or saliferous environments.

9.7 Valve arrangements shall be designed to eliminate dead spaces and crevices
where solids or debris can deposit or accumulate internally (e.g., bore,
cavity, etc.) or externally which may affect proper functioning or free
movement of the assembly. Protective covers or caps shall be included to
protect exposed surfaces, e.g., stem, from the environment where necessary
to ensure proper functioning and valve performance.

9.8 Valves shall be API 6A monogrammed. If a specified valve is outside the

scope of API 6A and cannot be monogrammed this shall be clearly identified

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Document Responsibility: Valves Standards Committee 04-SAMSS-055
Issue Date: 17 July 2014
Next Planned Update: 17 July 2019 General Valve Requirements, ISO 10423 (API 6A)

in the proposal with a list of specific points the valve cannot comply with for
company (VSCC) evaluation and written approval.

9.9 Valves shall meet the requirements of PSL 2 per ISO 10423 as a minimum.
Valves with pressure rating of API 5000 and above shall meet the
requirements of PSL 3 per ISO 10423 as a minimum, i.e., wrought products
shall be used. Testing requirements shall be per the specified PSL and the
requirements in 04-SAMSS-056.

9.10 Valves with special body profiles which prohibit the use of forged bodies
may be proposed in alternative body forms together with supporting
technical information for company (VSCC) evaluation and written approval.

9.11 Valves shall be suitable for operation and sealing under all the applicable
internal and external loading combinations, e.g., bending, compression,
tension, actuator weight, installation orientation, maximum actuator torque,
speed of operation, and shall be designed to withstand the maximum induced
stresses under worse case conditions with no permanent deformation of any
part or any deformation that may hinder valve operation.

9.12 Split body valve designs shall not have the split in the plane of the stem.

9.13 The weakest point of the stem shall always be outside the valve pressure
containing boundary.

9.14 Stems shall be one piece and shall include an integral shoulder to provide an
anti-blow-out feature. Stem retention by means of packing glands, threads,
or split rings are not acceptable. Stems shall not eject under any internal
pressure condition or if the packing gland components and/or valve operator
mounting components are removed.

9.15 Valves shall be a type qualified design per ISO 10423 Annex F PR2 where
qualification has been performed in one continuous testing cycle with no
maintenance steps.

9.16 Valve proposals for High Integrity Pressure Protection Systems (HIPPS)
shall include qualification testing per ISO 10423 Annex F PR2 for the
specified operating parameters, including the stroke speed.

9.17 All valves for isolation on/off service shall be type qualified designs per
API 6FA.

9.18 Choke valves used for well control which are specified as “fire safe by
design”, or, “fire safe by design not tested” shall pass an API 6FA fire test,
excluding the through bore leakage requirements, if company decides to
have the valve tested.

9.19 Any operational or performance limitations for valves with resilient seats
shall be highlighted, e.g., temperature limitations, maximum differential

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Document Responsibility: Valves Standards Committee 04-SAMSS-055
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Next Planned Update: 17 July 2019 General Valve Requirements, ISO 10423 (API 6A)

pressure limits, operational cycle limits, etc., for company (VSCC)

evaluation and written approval.

9.20 Past qualification test reports (complete procedure, valve drawing, post-test
stripdown, inspection, results) and an independent third party endorsed
certificate shall be provided to company upon request to demonstrate that the
proposed valve meets the requirements and there was no visible damage,
scoring or wear on any component during the qualification test that would
prevent the assembly being put into the intended service or that would be
likely to lead to the valve failing in service during the valve design life.

9.21 Any valve arrangement which has not been previously qualified per the
requirements listed in this specification shall be clearly identified in the
proposal. A test plan, schedule and details of the closest valve design which
has been previously subjected to qualification testing, including the main test
parameters, shall be included in the proposal.

9.22 Face-to-face dimensions shall be per ISO 10423 unless otherwise specified.
For valve sizes and ratings which are not covered by ISO 10423 the vendor
should propose dimensions for company (VSCC) evaluation and written
approval.

9.23 Valves shall be inherently antistatic or fitted with an antistatic device.

9.24 Valves specified with minimum design temperatures within the range of -
18°C to -46°C shall meet the requirements of 04-SAMSS-003.

9.25 Valves with temperatures rated above 250°F (+121°C) shall meet the
requirements of ISO 10423 Annex G as a minimum.

9.26 Vendor shall consider the valve orientation specified and shall include
saddles/legs for valves which have bore sizes of 5-1/8” and larger unless
otherwise specified or agreed.

9.27 Valves which are heavier than 250 kg shall have certified lifting points
included which shall be suitable for lifting, handling and installation of the
assembly in the specified orientation unless otherwise specified or agreed.

9.28 Lifting points designed for lifting subassemblies only, e.g., actuator only,
shall have suitable warning plates permanently attached to prevent
inadvertent lifting of the complete valve and actuator assembly.

9.29 The operation/installation/maintenance manual shall include clear

instructions for appropriate lifting of the valve assembly or sub-assembly
during handling, installation and removal from the specified orientation.

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Document Responsibility: Valves Standards Committee 04-SAMSS-055
Issue Date: 17 July 2014
Next Planned Update: 17 July 2019 General Valve Requirements, ISO 10423 (API 6A)

10 Materials, Coatings and Welding

10.1 The minimum ISO 10423 material classification and temperature

classification for the valve shall be “EE” and “U” respectively.

10.2 All materials shall be corrosion resistant to the intended service (e.g., design
parameters, operating conditions, flow composition, chemicals, specified test
fluids, etc.) and the information contained in the purchase
requisition/purchase order.

10.3 All wetted surfaces, parts, surface treatments, welds and heat-affected zones
of welds exposed to line fluids shall meet the requirements of ISO 15156.
This includes materials under overlays, plating’s or coatings.

10.4 Bonnet and closure bolting shall meet the requirements of ISO 10423 and
ISO 15156.

10.5 Valves specified for mainline scraper trap isolation service and HIPPS shall
have seat pockets, wetted functional areas, and primary seal areas overlaid
with Inconel 625.

10.6 Trim components, e.g., gate, ball, stem, seat, seat rings, clapper, piston rod,
pin, seating surfaces, trunnion plates, bushings, hinge pins, guides, and any
other small parts in contact with the service fluid, shall be forged material
and have a corrosion resistance equivalent to 410SST as a minimum.

10.7 Materials shall be selected to prevent galling between parts.

10.8 Springs or pushers shall provide equivalent or better corrosion resistance to

the seats and should be UNS N07750 as a minimum.

10.9 Sealant injection fittings and associated components, e.g., check valves, shall
have corrosion resistance equivalent or better than the trim.

10.10 All seat and stem seal injection surfaces shall have corrosion resistance equal
or better than the wetted surfaces of the valve body.

10.11 Seal surfaces shall be overlaid with higher corrosion resistance materials
where it is necessary for providing appropriate sealing performance in the
specified service.

10.12 Drain and vent fittings, plugs, drain valves, vent valve trims, gaskets, as
applicable, shall have equal or better corrosion resistance to the trim of the
main valve.

10.13 Vent valve bodies and blind drain and vent flanges shall have equal or better
corrosion resistance to the body of the main valve.

10.14 Internal epoxy lined coatings, electroless nickel plated (ENP), or, similar
type of coatings should not be used in lieu of solid stainless steel, corrosion

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Document Responsibility: Valves Standards Committee 04-SAMSS-055
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Next Planned Update: 17 July 2019 General Valve Requirements, ISO 10423 (API 6A)

resistant alloys, Inconel overlays, etc. Upgraded material should be used

where higher corrosion resistance is required.

10.15 Alternative materials which are equal or superior to those specified on the
valve datasheet should be proposed for company acceptance where they are
deemed necessary for the specific valve design or specified service.

11 Requirements for TCC Metal Seated Valves

11.1 A controlled procedure for High Velocity Oxygen Fuel (HVOF) Tungsten
Carbide Coating (TCC) of components shall be maintained at vendor’s or
sub vendor’s facility.

11.2 TCC shall be applied to the entire faces of the slab gate and seats. TCC shall
be applied to the ball and seat contact areas.

11.3 The minimum finished thickness shall be 100µ for gate valves and 150µ for
ball valves. TCC shall be 100% dye penetrant tested with no defects.

11.4 The same coating shall be applied to the closure member and the seats.

11.5 Coatings other than TCC should be proposed where the information in the
purchase requisition/purchase order indicates that an alternative hard coating
is more appropriate for valve performance. Alternative coating proposals
require company (VSCC) evaluation and written approval.

12 Sealing

12.1 Internal and external leak paths shall be minimized.

12.2 All non-metallic seals shall be suitable for the specified service and shall be
qualified per ISO 10423 Annex F PR 2 and the specified valve performance
requirements.

12.3 All seals and resilient seats which are wetted by the process fluids or which
may come in contact with process fluid, e.g., secondary stem seal which
becomes wetted if the primary seal leaks, shall be compatible with the
information specified in the purchase requisition/purchase order, e.g., design
parameters, operating conditions, flow composition, chemicals, test fluids,
etc.

12.4 Elastomers shall resist explosive decompression and section diameters shall
not exceed ¼ inch. Elastomeric seal usage should be minimized in gas
applications and unspecified hydrocarbon services in valves rated API 5000
and above. Elastomeric seals shall not be used as primary stem seals when
in contact with sliding stems. Elastomeric seals shall not be used for seating
contact surfaces.

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12.5 Stem sealing shall be achieved with inner and outer seal elements, or, with a
stem packing arrangement which meets the qualification requirements and
field history requirements in this specification as a minimum.

12.6 Stem and body-to-seat seal types and arrangements shall be designed to
accommodate the effects of stem and seat sealant/grease injection when
sealant/grease injection features are specified.

13 Connections and Fittings

13.1 Drain location shall be in accordance with MSS SP 45 and shall be at the
lowest possible position in the valve body. Drain connection shall be a
connection type shown in the table below.

Acceptable Drain and Vent Connections

API 6A 5000
API 6A 2000
Body Bore Size API 6A 10000
API 6A 3000
API 6A 15000
Parallel thread profile ISO 228-1 -
NPT -
˂ 7-1/16”
9/16” AE profile 9/16” AE profile
Blind Flange Blind Flange
≥ 7-1/16” Blind Flange Blind Flange

13.2 Parallel threaded connections shall be in accordance with ISO 14313:2007

(API 6D 23rd edition) Section 7.9. Plug size shall be ½” for valve sizes ≤ 4-
1/16” and shall be ¾” for valve bores ˂ 7-1/16”. Fitting shall be a fire safe
design and shall be designed to prevent crevice corrosion using a seal,
equivalent to the primary seals in the valve, positioned on the valve bore side
of the thread. Alternative proposals which provide equivalent features may
be submitted for company (VSCC) evaluation and approval.

13.3 NPT threaded connections shall be equivalent size and shall provide
equivalent features to parallel type thread connections. PTFE tape shall not
be used. A compound proven in similar services shall be used and details of
the compound shall be included in the proposal.

13.4 9/16” AE style fitting shall have a blind plug with anti-blowout shoulder.
The plug shall have equal or better corrosion resistance to the trim.
The body seating surface shall be overlaid where higher corrosion resistance
material is required for the intended service.

13.5 Fittings shall be securely locked to prevent loosening using a 316SST

locking ring secured to the body or bonnet, as applicable, using a 316 screw,
or equivalent. Locking ring shall be field removable and field replaceable..

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13.6 Blind flange connection shall be an ISO 10423 1-13/16” or 2-1/16” studded
flange face machined integral to forged valve bodies. The valve shall have a
blind flange attached which shall have a rating at least equal to the valve
assembly rating. Proposals for drain connections in cast bodies or small bore
ball valves where bolted trunnions are acceptable shall be submitted for
company (VSCC) evaluation and written approval.

13.7 When drain valves are specified the configuration shall provide two isolation
barriers and the drain valve shall meet the requirements of this specification.
The other end of the valve shall be fitted with a blind flange.

13.8 Monoflange shall not be used as a drain valve unless otherwise agreed in
writing with company (VSCC).

13.9 Vent connections and vent valves shall be equivalent to drain valves with
exception of body materials in Section 10 when applicable.

13.10 Combined drain and vent connections should be proposed for ball valves and
twinball valves where body bores are ≤ 4-1/16” where the vendor can
demonstrate that all pressure test requirements and leakage detection can be
accurately performed. Combined drain and vent proposals and the proposed
location of the drain/vent and test arrangement should be submitted to
company prior to PO issue. The proposal will be subject to company
evaluation of the suitability for the intended application and any onsite
testing requirements. Combined drain and vent is subject to company
written acceptance.

13.11 Valve assembly shall provide sufficient access for operation and
maintenance of fittings and valves, as applicable. The proposal shall be
clearly shown on the submitted drawing.

13.12 Sealant injection arrangements shall consist of the following:

a) One piece sealant injection fitting with an internal non-return valve
b) Non-return valve installed in the body (bonnet, closure, as applicable)
below all stem and seat sealant injection fittings
c) Sealant injection fitting shall have a giant button head and a cover which
has vent ports and which seals off the fitting by plugging the sealant port
d) The cover shall not be considered as one of the two barriers

13.13 Resilient seated ball valves with end connections 7-1/16” and larger shall be
supplied with seat sealant injection fittings. Reference Section 12.6.

13.14 Metal seated ball valves shall be supplied with seat injection features unless
otherwise specified.

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Document Responsibility: Valves Standards Committee 04-SAMSS-055
Issue Date: 17 July 2014
Next Planned Update: 17 July 2019 General Valve Requirements, ISO 10423 (API 6A)

13.15 Gate valves shall have an injection fitting, between the metal back seat and
the stem seal, which shall be an equivalent connection to the acceptable drain
connection types.

13.16 Stem sealant injection fitting shall be provided between the primary and
secondary stem seals on all ball valves and twinball valves. Reference
Section 12.6. Alternative seal arrangements shall provide equivalent features
or shall be submitted to company (VSCC) for evaluation and approval.

13.17 The submittal drawing shall provide complete details on the configuration
and arrangement.

14 Operator

14.1 Refer to 04-SAMSS-035 Section 8 for requirements.

14.2 Body to bonnet bolting shall not be used for mounting of actuators or
gearbox’s.

14.3 Operator torque shall not be re-acted by the bolting.

14.4 Provisions shall be provided to prevent any leakage from the valve reaching
or pressurizing the gearbox or actuator housing.

14.5 Ball, Twinball, Gate and Check valves shall meet the additional requirements
specified in ISO 14313:2007 (API 6D 23rd edition) sections 7.13 through
7.20.

15 Inspection, Examination and Testing

Refer to 04-SAMSS-048, 04-SAMSS049, and 04-SAMSS-056 for requirements.

16 Painting and External Coating

Refer to 04-SAMSS-035 Section 10 for requirements.

17 Marking

17.1 Each valve assembly shall have a 316 stainless steel nameplate which shall
be permanently attached to the valve body. Marking on nameplates shall be
permanent using a low stress stamp.

17.2 Nameplates shall include all information outlined in ISO 10423, API 6FA
and shall also include the Purchase Order number and tag number as
specified as a minimum.

17.3 Unidirectional valves, or, valves with a preferred direction of flow shall have
permanent directional marking on the valve body.

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Document Responsibility: Valves Standards Committee 04-SAMSS-055
Issue Date: 17 July 2014
Next Planned Update: 17 July 2019 General Valve Requirements, ISO 10423 (API 6A)

17.4 Valves with special seating configurations, e.g., contain one DIB seat, shall
have permanent marking and highly visible marking on the body which
clearly identifies the seat configuration.

17.5 Monoflanges shall have marking on each connection which clearly indicates
the function of each valve and shall also meet EEMUA-182 requirements.

18 Preparation for Shipping

Refer to 04-SAMSS-035 Section 12 for requirements.

Revision Summary
17 July 2014 New Saudi Aramco Materials System Specification.

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Document Responsibility: Valves Standards Committee 04-SAMSS-055
Issue Date: 17 July 2014
Next Planned Update: 17 July 2019 General Valve Requirements, ISO 10423 (API 6A)

Appendix A – Vendor Technical Evaluation Minimum Requirements

a. Facility holding ISO 10423 and API 6A PSL 3G certification as a minimum

b. Supply history for similar ISO 10423 and API 6A valves in similar services,
applications and operating conditions with minimum of 5 years satisfactory
performance history with 3 different major oil and gas companies at 3 different
locations in Europe and North America for each major oil and gas company.
Other history periods shall be subject to the review and approval of the VSCC.
c. Past supply history for ISO 10423 and API 6A valves per the layout in Appendix B.
d. Written testimonials (including the persons full name, job title, work address, e-mail
address, and telephone number) from the major oil and gas companies and projects
the VSCC selects from the vendors past supply history shall be provided for VSCC
approval.
e. Past qualification testing list for ISO 10423 and API 6A valves per the layout in
Appendix B which are applicable to the assessment. The list shall clearly identify
the details of the valve and the specific test performed, e.g., ISO 10423 API 6A PR 2
App. F, ISO 10423 API 6A App. I, API 6FA, etc., and the main test parameters
including closing stroke speeds
f. Qualification packages for the references the VSCC selects from the experience list.
A package should consist of the complete test procedure, complete test report and
results, valve cross sectional drawing, and independent third party certificate.
g. Engineering department with experience in the following as a minimum: evaluating
valve applications, suitable valve features, performing detailed stress calculations,
finite Element Analysis (FEA), Computational Fluid Dynamics (CFD), dynamic
simulation studies, material selection, seal selection, welding and overlay,
manufacturing and assembly, testing, qualification of valves per ISO 10423 and
API 6A including all appendices.
h. Facility to perform required Non Destructive Examination (NDE), assembly,
hydrostatic testing and an appropriate gas test facility for performing all required
testing up to the maximum rating required.
i. Past history and established experience with special testing, including but not
limited to performance, slurry, shock, torsion, bending, fire
j. Preservation, packing, painting, and storage facility
k. List of sub-suppliers and material suppliers which have been evaluated, audited,
approved and proposed by vendor for the pressure containing components, pressure
controlling components, pressure retaining components, trim components, tungsten
carbide coating, seals, and bolting as a minimum.

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Document Responsibility: Valves Standards Committee 04-SAMSS-055
Issue Date: 17 July 2014
Next Planned Update: 17 July 2019 General Valve Requirements, ISO 10423 (API 6A)

l. The following additional information shall be provided upon request: sub vendors
and material suppliers past supply history for valves supplied to other major oil and
gas companies, quality control procedures, raw material sourcing controls, forging
capabilities, heat treatment facilities, qualification experience for different valve
component sizes, weights, profiles, material grades, past auditing, sub vendors and
material suppliers industry certifications, e.g., ISO, API, PED, NORSOK.
m. Vendor shall provide details on the experience and specialist personnel to support
installation during onshore and offshore commissioning, start up and after service.
n. The VSCC may decide that additional information is required to establish the
vendor’s suitability where the vendor does not meet certain requirements, or, where
additional information or objective evidence is deemed necessary to demonstrate
vendor’s suitability. This may include but is not limited to items such as
API RP 591, DNV RP A203, NORSOK M650, field testing, destructive
examination of sample valves.

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 Document Responsibility: Valves Standards Committee 04-SAMSS-055
Issue Date: 17 July 2014
Next Planned Update: 17 July 2019 General Valve Requirements, ISO 10423 (API 6A)

Appendix B – Past Supply History Template

Column Column Column Column Column Column Column Column Column Column
01 02 03 04 05 06 07 08 09 10
End
Year End Applica- connec- Pressure Body
Project Location Service QTY
Shipped User tion tion Rating bore size
Size/Type

Column Column Column Column Column Column Column Column Column Column
11 12 13 14 15 16 17 18 19 20
Tempera-
Seating Body ISO 10423 Past
Valve Valve ture
Type Material Material PSL Actuation API PR Qualifi-
Type sub Type Rating
Material Grade Class cations
Range

1. List shall be provided in excel format with columns 1 through 20 included per the above
2. Each row on the table shall be for an individual valve type and configuration
3. Identify specific valves which have been subject to past qualification testing (reference Appendix A - point e)

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