1. GENERAL ……………………………..1.1
Summary
1.2
References
1.3
Submittals …………………………
1.4 Quality Assurance
2. PRODUCTS
2.1 General …………………………….2.2 Materials
2.3
Design Criteria
2.4
Fabrication and Manufacture
2.5
Inspection And Tests
2.6
Identification and Tagging
2.7
Preparation For Shipment ……
3. EXECUTION
4. ATTACHMENTS
1. General
1.1 Summary
1.1.1 Scope of Specification
1.1.1.1 This specification prescribes the requirements for purchase of gate, globe, and check valves, and
other types of rising stem metal-seated valves.
1.1.1.2 This specification is a supplement to the Item Code Purchase Description shown in the Bills of
Material.
1.1.2 Work Not Included
1.1.2.1 Installation of valves is not included in Supplier’s scope except to the extent of providing installation
instructions as part of the Submittals.
1.1.2.2 Maintenance and repair of material after receipt and acceptance by authorized personnel, and
jobsite storage, are not included in Supplier’s scope except where warranty repairs are determined to be
required.
1.1.2.3 Unloading at jobsite is not included.
1.1.3 Related Specification
Work in this specification shall be coordinated with the following Piping Engineering Specifications, which
provide related technical requirements pertinent to this specification:
SABIC Engineering Standards
P18-G01 Design Limitations and Applications of Valves
P14-T03 Specification for Piping, Traceability and Certification
Note. Documents listed above should be attached for Supplier’s information.
1.1.4 Supplied by Supplier
1.1.4.1 Supply of Material
a. Supplier’s scope shall include the supply of material as specified in the PO (Purchase Order)
and written clarifications thereto; modifications necessary to meet the requirements of the Item
description; additional engineering notes in the PO; examination and testing; preparation of the
material for shipment; suitable packaging; and Manufacturer’s warranty.
b. All piping materials shall be clearly marked with country of origin in accordance with applicable
government regulations. In addition, all materials shall be produced by Manufacturers listed in the
Acceptable Manufacturers List (AML). Any materials deviating from these requirements must have
prior written authorization or will be subject to rejection or additional verification or testing at the
Seller’s expense.
1.1.4.2 Equivalent Manufacturers
Items specified or referenced by the Manufacturer and figure number are not intended to exclude items
offered by other Manufacturers. Products made by reputable Manufacturers and of comparable type,
quality, and characteristics may be submitted for evaluation.
1.1.4.3 Refurbished Material
Valves furnished shall be original Manufacturer’s production. Reconditioned or new surplus valves shall
not be furnished.
1.1.4.4 Approved Manufacturer
The approved Manufacturer, shown below the Item Description on the PO, is the Manufacturer and figure
number accepted by Contractor, and no other valve manufacturer may be furnished other than that shown.
When a Manufacturer and figure number is not shown below the Item Description, the supplier shall
furnish the valve Manufacturer and figure number referenced in the Item Description.
1.1.5 Terminology
1.1.5.1 Authorized or Authorization: Authorized or authorization given by Contractor Piping Engineering.
1.1.5.2 Major Repairs: Repairs defined as major in ASTM-A217.
1.1.5.3 Minor Repairs: Repairs not defined as major repairs.
1.1.5.4 Critical Areas: Areas for radiographic coverage that shall be a matter of agreement between
Contractor and the Manufacturer in accordance with ASME B16.34.
1.1.5.5 Casting Quality Factor: A factor E© assigned to the quality of castings defined by the applicable
Piping Code, i.e. ASME B31.1, ASME B31.3, ASME B31.4, etc.
1.1.5.6 100 Percent Examination: Referring to 100 percent volumetric examination by radiography or 100
percent of exterior surface examination by dye penetrant or magnetic particle; it shall be as defined in the
PO or Item Description and will not be required unless so stated.
1.1.5.7 Refurbishment: The furnishing of valves that are not new and not the original Manufacturer’s
production.
1.2 References
The publications listed below form part of this specification. Each publication forms part of this specification
and shall be the latest revision and addendum in effect on the date this specification is issued for
construction unless noted otherwise. Except as modified by the requirements specified herein or the details
of the drawings, Work included in this specification shall conform to the applicable provisions of these
publications.
1.2.1 API (American Petroleum Institute)
1.2.1.1 6D Specification for Pipeline Valves (Steel Gate, Plug, Ball, and Check Valves)
1.2.1.2 594 Wafer and Wafer-Lug Check Valves
1.2.1.3 598 Valve Inspection and Testing
1.2.1.4 600 Steel Gate Valves – Flanged and Butt Welding Ends
1.2.1.5 602 Compact Carbon Steel Gate Valves – Flanged, Threaded, Welding and Extended Body Ends
1.2.1.6 603 Class 150 Cast Corrosion-Resistant Flanged End Gate Valves
1.2.2 ASME (American Society of Mechanical Engineers)
1.2.2.1 Boiler and Pressure Vessel Code, Section II, Material Specifications
1.2.2.2 Boiler and Pressure Vessel Code, Section IX, Welding and Brazing Qualifications
1.2.2.3 B1.1 Unified Inch Screw Threads
1.2.2.4 B1.20.1 Pipe Threads, General Purpose (Inch)
1.2.2.5 B16.1 Cast Iron Pipe Flanges and Flanged Fittings
1.2.2.6 B16.5 Pipe Flanges and Flanged Fittings
1.2.2.7 B16.10 Face-to-Face and End-to-End Dimensions for Ferrous Valves
1.2.2.8 B16.11 Forged Steel Fittings, Socketwelding, and Threading
1.2.2.9 B16.20 Metallic Gaskets for Pipe Flanges – Ring-Joint, Spiral-Wound, and Jacketed
1.2.2.10 B16.25 Butt Welding Ends
1.2.2.11 B16.34 Valves – Flanged, Threaded and Welding End
1.2.2.12 B16.47 Large Diameter Steel Flanges, NPS 26 through 60
1.2.2.13 B31.1 Power Piping
1.2.2.14 B31.3 Process Piping
1.2.2.15 B31.4 Liquid Transportation Systems for Hydrocarbons, LPG, Anhydrous Ammonia, and Alcohols
1.2.2.16 B36.10M Welded and Seamless Wrought Steel Pipe
1.2.2.17 B36.19M Stainless Steel Pipe
1.2.2.18 B46.1 Surface Texture
1.2.3 ASNT (American Society for Nondestructive Testing)
1.2.3.1 SNT-TC-1A Recommended Practice for Nondestructive Testing Personnel Qualification and
Certification
1.2.4 AWS (American Welding Society)
1.2.4.1 A5.13 Specification for Solid Surfacing Welding Rods and Electrodes
1.2.5 MSS (Manufacturers Standardization Society of the Valve and Fittings Industry)
1.2.5.1 SP-6 Standard Finishes for Contact Faces of Pipe Flanges and Connecting-End Flanges of Valves
and Fittings
1.2.5.2 SP-25 Standard Marking System for Valves, Fittings, Flanges, and Unions
1.2.5.3 SP-42 Class 150 Corrosion Resistant Gate, Globe, Angle and Check Valves with Flanged and Butt
Weld Ends
1.2.5.4 SP-45 Bypass and Drain Connection Standard
1.2.5.5 SP-53 Quality Standard for Steel Castings and Forgings for Valves, Flanges, Fittings, and Other
Piping Components – Magnetic Particle Examination Method
1.2.5.6 SP-54 Quality Standard for Steel Castings for Valves, Flanges, Fittings, and Other Piping
Components
1.2.5.7 SP-55 Quality Standard for Steel Casting for Valves, Flanges, Fittings and Other Piping
Component – Visual Method
1.2.5.8 SP-61 Pressure Testing of Steel Valves
1.2.5.9 SP-70 Cast Iron Gate Valves, Flanged and Threaded Ends
1.2.5.10 SP-71 Cast Iron Swing Check Valves, Flanged and Threaded Ends
1.2.5.11 SP-80 Bronze Gate, Globe, Angle and Check Valves
1.2.5.12 SP-84 Steel Valves, Socketwelding and Threaded Ends
1.2.5.13 SP-85 Cast Iron Globe and Angle Valves, Flanged and Threaded Ends
1.2.5.14 SP-93 Quality Standard for Steel Castings and Forging for Valves, Flanges, Fittings and Other
Piping Components – Liquid Penetrant Examination Method
1.2.5.15 SP-94 Quality Standard for Steel Castings and Forging for Valves, Flanges, Fittings, and Other
Piping Components – Ultrasonic Examination Method
1.2.6 NACE (National Association of Corrosion Engineers)
1.2.6.1 MR-01-75 Sulfide Stress Corrosion Cracking Resistant Metallic Materials for Oilfield Service
1.2.7 Precedence of Requirements
1.2.7.1 Conflicts in technical requirements shall be resolved in the following order of precedence:
a. Technical requirements specified in the Request for Quotation or Purchase Order, as applicable,
and identified as Additional Technical Requirements or Engineering Notes.
b. Item Description as shown on the Bills of Material.
c. Requirements of this specification.
d. Requirements of referenced codes or standards (for example, ASMEB16.34).
1.3 Submittals
1.3.1 Certificate of Compliance
1.3.1.1 Supplier shall furnish Certification of Compliance to all requirements of the Purchase Order, in
accordance with the Supplier Drawing Data (SDR) Report.The certification shall include Contractor’s PO
number, item Code Numbers, name and address of supplier and shall be certified by the Supplier’s Q.A.
Manager or authorized agent.
1.3.1.2 The following apply to valves with body and bonnet material specified to an ASME (SA or SB)
specification in the Item Description:
a. Supplier shall furnish the Manufacturer’s Certification of Compliance with the referenced ASME
specification for the body, bonnet and bonnet bolting. Documents shall be identified with Contractor’s
PO Number and Item Code Number and shall be signed by the Manufacturer’s authorized agent.
b. ASTM materials may be substituted for materials specified as ASME, provided that the ASME
specification is indicated (below the title) to be identical with the corresponding ASTM specification for
the grade, class, or type produced. The Manufacturer shall state the dual compliance on the
Certification of Compliance. ASTM specification material substitutions shall be submitted for
evaluation at the time of quotation.
1.3.2 Manufacturer Test Reports (MTR)
A complete MTR (Manufacturer Test Report) showing results of all chemistry and physical tests shall be
provided for impact tested steels, chrome steel, stainless steel, and nickel alloy valves. The MTR shall
include, as a minimum, name of supplier, name of prime material manufacturer and plant location,
Contractor PO, item code number, material specification, grade and class, actual test results of chemical
analysis and mechanical properties and certified by Quality Control Manager or representative.
1.3.3 Welding Procedures
If specified in the PO or in the Item Description, and if valves are manufactured with pressure retaining
welds (including seal welds and where castings are repaired by welding), Supplier shall furnish the
Manufacturer’s welding procedures (QW-482) and procedure qualifications (QW-483) for Contractor
Welding Engineering acceptance. The procedures and qualifications shall be in accordance with
ASME Section IX and shall specify the maximum allowable fitup offset and misalignment for girth and miter
joint butt welds. The qualification shall include hardness testing in accordance with applicable Piping Code,
i.e. ASME B31.1, ASME B31.3, ASME B31.4, etc. The hardness testing shall be performed on the base
metal, weld metal, heat affected zone, and after any required heat treatment.
1.3.4 Supply of Drawings
1.3.4.1 Supplier shall furnish dimensional drawings or catalog cuts for all valves (other than the referenced
valves) with his quotation.
1.3.4.2 Dimensional drawings shall also be furnished for the following with his quotation:
a. Valves larger than NPS 24.
b. Class 900 and higher rating.
c. Valves for which published catalog dimensional data are not available.
d. Gear operator installations.
e. Valves with nonstandard dimensions.
f. Valves with welded-on nipples.
g. Detail of the end bevel for weld-end valves with nominal wall thickness greater than 0.88 inch
(22.2 mm).
h. As required by Item Code Purchase Description or Purchase Order.
1.3.4.3 These drawings shall include materials of construction with referenced material specification.
1.3.4.4 Supplier shall be prepared to furnish, on request, dimensional drawings showing stem or shaft
sealing design and number of size of packing rings or stem seals required for each type and size of valve
in the PO.
1.3.4.5 Total weight of the valve including operator shall be shown on the drawings.
1.3.5 Hydrostatic Test Certification
The Supplier shall furnish certification of hydrotest in accordance with Section 2.5.1 of this specification.
The test results may be included in the MTR (Manufacturer’s Test Report).
1.3.6 Maximum Field Pressure Test
Supplier shall furnish the maximum allowable hydrostatic shell and seat test pressures that valves can be
subjected to, during field pressure testing, for valves not manufactured in accordance with a standard.
Note: All submittals (except weld procedures per Item 1.3.3 and drawings per Item 1.3.4) shall be shipped
with the valves. Do not send to Contractor’s office.
1.4 Quality Assurance
1.4.1 Inspection Authorization
Examination or tests may be reviewed or witnessed by Contractor or its authorized agent at Supplier’s or
Manufacturer’s facility.
1.4.1.1 A general inspection of the facility for quality control procedures may be made as selected by the
Inspector.
1.4.1.2 Valve castings shall have visual inspection in accordance with MSS SP-55 as selected by the
Inspector.
1.4.1.3 Repairs shall be inspected as selected by the Inspector after the repairs have been made.
1.4.2 Refurbishment
1.4.2.1 Refurbishment is not permitted unless specifically authorized.
1.4.2.2 Modification of new valves is permitted only if specifically authorized, and if the requirements of
Section 2.4.3 are satisfied.
1.4.3 Major Repairs
Major repairs shall not be performed without authorization. Welding Procedures (refer to Section 1.3.3.)
may be furnished for evaluation as an alternative to this requirement.
2. Products
2.1 General
Valves shall be in accordance with the general requirements of ASME B16.34 or API Std. 600, except as
noted below.
2.2 Materials
2.2.1 Brass and Bronze Valves
2.2.1.1 Design of brass and bronze valves shall comply with MSS SP-80.
2.2.1.2 Materials of construction shall be manufacturer’s standard except asbestos or asbestos bearing
material shall not be used.
2.2.2CastIronandDuctileIronValves
2.2.2.1 Cast iron valves shall comply with MSS SP-70, SP-71, or SP-85, as applicable.
2.2.2.2 Materials of construction shall be manufacturer’s standard except asbestos or
asbestos bearing material shall not be used.
2.2.3 Forged Steel, Low Alloy, and Stainless Steel Valves
2.2.3.1 Design
Class 800 gate valves (including extended body design) shall comply with API 602. Globe, angle, and
check valves shall comply with API 602 insofar as applicable. Valves over Class 800 shall comply with
ASME B16.34 and MSS SP-84.
2.2.3.2 Trim
If F6 (13 chrome or 410 stainless) trim is specified in the Item Description, hardfaced seats or seats and
disc may be provided. If hardfaced seats and disc are specified, both the seats and the disc shall be
hardfaced. Hardfacing shall be of Number 6 composition or equal, according to AWS A5.13 Grade CoCrA.
For trim materials whose hardness API 602 or 600 does not specify, there shall be a minimum differential
hardness of 50 BHN between the seating surfaces and the disc surfaces.
2.2.3.3 Stem Packing
Packing shall be pure graphite foil packing suitable for 1000 °F (538 °C) oxidizing services with braided
graphite fiber rings on the top and bottom of the packing stack, unless other packing is specified in the Item
Description.
2.2.3.4 Bonnet Gaskets
Gaskets shall be spiral wound metal with filler. Metal windings shall be same as body and bonnet (Type
304 stainless minimum); and filler shall be pure graphite, unless otherwise stated in the Item Description.
2.2.3.5 Bonnet Bolting
Bolting shall be ASTM-A193 Grade B7 with ASTM-A194 Grade 2H nuts unless otherwise specified in the
Item Description. If “Sour Service” or “H2S Service” is specified in the description, bolting shall follow
NACE MR-01-75
Class II. Bolt protrusion through the nut shall be 1-1/2 threads maximum.
2.2.3.6 Metallurgy
a. Austenitic stainless steels shall be furnished in the solution annealed condition.
b. Monel body material for screwed, socketweld end, and butt weld end valves shall be of a
weldable composition.
2.2.4 Cast Steel and Low Alloy Valves
2.2.4.1 Design
Bolted bonnet gate valves shall comply with API 600 or ASME B16.34, as applicable. Globe, angle, and
conventional check valves shall comply with API 600 insofar as applicable, including minimum wall
thickness and stem diameter.
Pressure seal bonnet valves shall comply with ASME B16.34. Seal welded bonnet valves shall comply with
ASME B16.34. Wafer check valves shall comply with API 594.
2.2.4.2 Trim
The base material of discs shall be of the same material (or higher alloy) as the body. Where F6 (13
chrome or 410 stainless) trim is specified, hardfaced seats, or seats and disc may be provided. If hardfaced
seats and disc is specified, both the seats and the disc shall be hardfaced. Hardfacing shall be Number 6
composition or an approved substitute, in accordance with AWS A5.13 Grade CoCrA. For trim materials
whose hardness API 602 or 600 does not specify, there shall be a minimum differential hardness of 50
BHN between the seating surfaces and the disc surfaces.
2.2.4.3 Stem Packing
Packing shall be a graphite, braided, nonasbestos packing suitable for 800 °F (425 °C) steam or petroleum
services, and containing a sacrificial metal corrosion inhibitor, or pure graphite foil packing suitable for
1000 °F (538 °C) oxidizing services with braided graphite fiber rings on the top and bottom of the packing
stack.
2.2.4.4 Bonnet Gaskets
Class 150 oval bonnet gasket shall be of the corrugated metal type with graphite filler. Metallurgy shall be
the same or better than bonnet material. For Class 300 and higher rating, gaskets shall conform to the
requirements of API 600.
For round bonnets, gaskets shall be spiral wound metal with filler, or solid corrugated metal. Metal
windings shall be Type 304 stainless minimum, and filler shall be nonasbestos suitable for 800 °F or
graphite, unless otherwise stated in the Purchase Description. Ring joint bonnet gasket designs shall have
a smooth radius transition between the bottom and sides of the ring groove. Maximum allowable hardness
of ring joint gaskets shall follow ASME B16.20.
2.2.4.5 Bonnet Bolting
Bolting shall be ASTM-A193 Grade B7 with ASTM-A194 Grade 2H nuts unless otherwise specified in the
Purchase Description. Where “Sour Service” or “H2S Service” is specified in the description, bolting shall
follow NACE MR- 01-75 Class II. Bolt protrusion through the nut shall be 1-1/2 threads maximum.
2.2.5 Cast Stainless and High Alloy Valves
2.2.5.1 Design
Class 150 bolted bonnet gate valves shall comply with API 603. Class 150 globe, angle, and conventional
check valves shall comply with ASME B16.34. Class 300 and higher bolted bonnet gate valves shall
comply with API 600, except wall thickness may comply with ASME B16.34. Pressure seal bonnet valves
shall comply with ASME B16.34. Seal welded bonnet valves shall comply with ASME B16.34. Wafer check
valves shall comply with API 594.
2.2.5.2 Trim
The base material of discs shall be of the same material (or higher alloy) as the body. For trim materials
whose hardness API 600 does not specify, there shall be a minimum differential hardness of 50 BHN
between the seating surfaces and the disc surface. If “Stellited Seats And Disc” is specified, either
hardfacing overlay or a case-hardening treatment may be furnished. Hardfacing shall be of Number 6
composition or an approved substitute, in accordance with AWS A5.13 Grade CoCrA. ASTM-A564, Grade
630 (17-4PH stainless steel) used for stems shall be heat treated in accordance with NACE MR-01-75,
Appendix A, and shall have a hardness within the range of HRC 29 to HRC 33.
2.2.5.3 Stem Packing
Packing shall be a graphite, braided, nonasbestos packing suitable for 1000 °F (538 °C) steam or
petroleum services, and containing a sacrificial metal corrosion inhibitor, or pure graphite foil packing
suitable for 800 °F (425 °C) oxidizing services with braided graphite fiber rings on the top and bottom of
the packing stack. Where TFE packing is specified in the Item Description, it may be either braided
nonasbestos packing impregnated with TFE, braided pure TFE packing, or pure virgin TFE chevron rings.
Graphite is not permitted in any TFE packing.
2.2.5.4 Bonnet Gaskets
For Class 150 oval bonnets, gaskets shall be corrugated 316 SS with graphite filler as a minimum. For
round bonnets, gaskets shall be spiral wound metal with filler, or solid corrugated metal. Metal windings
shall be same as body and bonnet (Type 304 stainless minimum), and filler shall be nonasbestos suitable
for 800 °F or graphite, unless otherwise stated in the Item Description. Ring joint bonnet gasket designs
shall have a smooth radius transition between the bottom and sides of the ring groove. Maximum
allowable hardness of ring joint gaskets shall be in accordance with ASME B16.20.
2.2.5.5 Bonnet Bolting
Bolting shall be ASTM-A193 Grade B7 with ASTM-A194 Grade 2H nuts unless otherwise specified in the
Purchase Description. ASTM-A193 Grade B8 or B8M, Class 2, with ASTM-A194 Grade 8 or 8M nuts, are
also acceptable. Bolt protrusion through the nut shall be 1-1/2 threads maximum.
2.2.5.6 Metallurgy
a. Austenitic stainless steels shall be furnished in the solution annealed condition.
b. Monel body material for screwed, socketweld end, and butt weld end valves shall be of a
weldable composition.
2.3 Design Criteria
2.3.1 Dimensions
Valves shall have an end-to-end dimension in accordance with ASME B16.10 or API 6D as applicable.
End-to-end dimensions of flanged end, butt weld end, or wafer type valves that differ from the Manufacturer
and figure number listed in the Item Description, such as short pattern versus regular pattern, are not
permitted without authorization.
2.3.2 Sour Service or H2S Service
Materials furnished for valves where the Item Description states “For Sour Service” or “For H2S Service”
shall be in accordance with NACE MR-01-75.
2.3.3 No Copper
Valves specified in the Item Description as “No Copper Permitted” shall not have copper or copper bearing
alloy materials (except trace elements) used in their construction. This includes internal and external parts
such as trim, backseat or yoke bushing, stem nut, and gland follower.
2.3.4 Welded-on Flanges
Flanged end valves with welded-on flanges other than those specified as API 602 pattern are not
permitted. Butt weld ends machined from flanged valves are not permitted.
2.3.5 End Bores
Weld bevels and end preparation shall be in accordance with ASME B16.25. Bore diameters at the end
bevel shall be in accordance with ASME B36.10M or B36.19M, as applicable when specified as a
schedule.
2.3.6 Threaded and Socketweld Ends
Threaded ends shall have taper pipe threads in accordance with ASME B1.20.1. Socketweld ends shall be
in accordance with ASME B16.11.
2.3.7 Flange Finish
The finish for gasket surfaces of flanged ends shall be in accordance with ASME B16.5. The gasket
surface shall have concentric or spiral grooves resulting in a roughness height within the range of 125 to
250 microinch Ra. Roughness heights outside of this range are not permitted. Acceptance criteria for
flange damage are listed in United Specification 0000-P-0034.
2.3.8 Backseat
Gate and globe valves shall have backseating designs to permit repacking under pressure while the valve
is in the open position.
2.3.9 Body Tappings
Location and designation of body tappings, if so specified in the Purchase Description, shall be in
accordance with Figure 1 of ASME B16.34. Tappings shall be taper pipe threaded in accordance with
ASME B1.20.1 and shall be fitted with solid forged plugs of the same basic metallurgy as the valve body.
Socketwelding openings shall be in accordance with ASME B16.11 and shall be fitted with plastic plugs.
2.3.10 Wedge and Disc Design
Gate valves shall be solid wedge or flexible wedge at the Manufacturer’s option, unless otherwise
specified. Globe valves shall have plug-type disc.
2.3.11 Gear Operators
2.3.11.1 Gear operators shall be fully enclosed type with cast housing, furnished with a stem protector.
Enclosures fabricated from sheet metal are not permitted.
2.3.11.2 Gear operators shall be sized to operate the valve under full differential pressure unless a lower
maximum differential is stated. Maximum allowable rim pull is 120 lbf (530 N).
2.3.12 Tapped Bolt Holes
Tapped bolt holes in valve bodies such as in lug type or single flange valves shall be threaded in
accordance with ASME B1.1. Threads shall be the Coarse Thread Series (UNC) through 1-inch bolt size
and the 8 Pitch Thread Series (8UN) for bolt sizes of 1-1/8 inches and larger, with a Class 2B tolerance.
2.4 Fabrication and Manufacture
2.4.1 Fabrication by Welding
Valves fabricated entirely or partially by welding, not including seal welds of bonnets, shall comply with the
design requirements of this specification unless where specifically authorized. Welding procedures
detailed in Section 1.3.3 are required for evaluation prior to commencement of fabrication.
2.4.2 Repairs
Minor casting repairs shall conform to the ASTM specification referenced for manufacture. Limitations on
imperfections and method and extent of required examination for repairs shall be the same as required for
the original castings. Repair of castings by peening or impregnation with metallic or nonmetallic materials
is prohibited.
2.4.3 Modification of New Valves
2.4.3.1 Modifications are not permitted without authorization.
2.4.3.2 Modifications to valves that have been completely assembled and pressure tested by the
Manufacturer shall conform to one of the following, as applicable:
a. Modifications by Manufacturer
If modifications have been performed by the Manufacturer of the valve, the completely modified valve
shall be pressure tested in accordance with Section 2.5.1.
b. Modifications by Other than Manufacturer
Modifications shall be described in the quotation and shall contain the information listed below:
(i) The extent of modification (packing change, new seat material, refacing of flange faces).
(ii) The name of the firm performing the modification.
(iii) Statement of warranty.
2.5 Inspection And Tests
2.5.1 Pressure Testing
2.5.1.1 Valves shall be pressure tested in accordance with the standard to which they are manufactured.
Valves manufactured to an API standard shall be tested to API 598. Steel valves not covered by an API
standard shall be tested in accordance with MSS SP-61. Other valves shall be tested in accordance with
the procedures of MSS SP-61 except that the test pressures shall be as follows:
Shell: 1.5 × P
Seat: 1.0 × P
where P = The non-shock cold working pressure or WOG (Water-Oil-Gas) rating specified by the
Manufacturer.
2.5.1.2 Pressure testing of austenitic stainless steel valves shall conform to the following additional
requirements:
a. Only water containing less than 50 ppm (.050 mg/liter) chloride ion shall be used for pressure
testing.
b. Following pressure testing, the test water shall be immediately drained and valves shall be dried
by blowing with air or dry nitrogen.
2.5.1.3 The type or style of valve stem packing or stem seals used during pressure testing shall be the
same as that specified to be supplied with the valve.
2.5.1.4 Valves packed for vacuum (external pressure) service shall be allowed the same leak rate as
defined for internal pressure.
2.5.2 Examination
2.5.2.1 Examination is required only where specified in the Item Description or the Purchase Order.
2.5.2.2 Surfaces to be examined shall be clean and free from surface conditions that may mask
unacceptable conditions.
2.5.2.3 Personnel performing or evaluating examinations other than visual examination and hardness
testing shall be qualified in accordance with the ASNT SNT-TC-1A. Only Level II or Level III personnel
shall be authorized to interpret results for radiographic and ultrasonic examinations.
a. Valve castings shall meet the visual acceptance standards of MSS SP-55.
b.
If radiographic examination is specified or performed, examination and acceptance criteria shall
be in accordance with MSS SP-54.
Where casting quality factor of 1.00 is specified in the Item Description, the additional requirements of
Paragraph 2.5.3 shall apply.
c.
If magnetic particle examination is specified or performed, examination and acceptance criteria
shall follow MSS SP-53.
If magnetic particle examination has been specified, liquid penetrant examination may be applied only
to surfaces not accessible for magnetic particle examination.
If casting quality factor of 1.00 is specified in the Item Description, the additional requirements of
Paragraph 2.5.3 shall apply.
d.
If liquid penetrant examination is specified or performed, examination and acceptance criteria
shall follow MSS SP-93.
If casting quality factor of 1.00 is specified in the Item Description, the additional requirements of
Paragraph 2.5.3 shall apply.
e.
If ultrasonic examination is specified or performed, examination and acceptance criteria shall
follow MSS SP-94.
f. Impact tests, if required by the material specification or Item Description, shall be in accordance
with applicable Piping Code, i.e. ASME B31.1, ASME B31.3, ASME B31.4, etc.
2.5.3 Additional Examination Requirements
Wherever Casting Quality Factor of 1.00, Critical Service, or Category M Service is specified in the Item
Description or the Purchase Order, castings in all materials shall have a casting quality factor E(C) of 1.00
according to ASME B31.3, Chapter II – “Increased Casting Quality Factor E” Table consisting of either
2.5.3.1 or 2.5.3.2, following:
2.5.3.1 Carbon Steel and Chrome-moly Alloy
a. All accessible exterior and interior surfaces of each casting in carbon steel and chrome-moly
alloy materials shall have dry powder magnetic particle examination in accordance with MSS SP-53
with acceptance criteria in accordance with MSS SP-53, using reference photographs in ASTM-E125.
b. Fully radiograph all critical areas as defined by the manufacturer and agreed upon by Contractor
Piping Materials Engineer. Radiography shall be in accordance with MSS SP-54 with acceptance
criteria in accordance with ASME/ B31.3, Chapter II – “Acceptance Levels For Castings” Table and
reference radiographs in ASTM-E446, E186, or E280 as applicable.
2.5.3.2 Austenitic Stainless Steel and Nickel Alloys
a. All accessible exterior and interior surfaces of each casting in austenitic stainless steel or nickel
alloy castings shall have liquid dye penetrant examination in accordance with ASTM-E165 with
acceptance criteria in accordance with Table 1 of MSS SP-53, using ASTM-E125 as a reference for
surface flaws.
b. Fully radiograph all critical areas as defined by the manufacturer and agreed upon by Contractor
Piping Materials Engineer. Radiography shall be in accordance with MSS SP-54 with acceptance
criteria in accordance with ASME/ B31.3, Chapter II – “Acceptance Levels For Castings” Table and
reference radiographs in ASTM-E446, E186, or E280 as applicable.
2.6 Identification and Tagging
2.6.1 Marking
Each valve shall be marked in strict accordance with the standard referenced for manufacture except that
minimum requirements of MSS-SP-25 shall be satisfied.
2.6.2 Tagging
2.6.2.1 Each valve shall be fitted with a rust-resistant metal tag securely attached with no fewer than 6
twists of stainless steel wire. Paper or plastic tags are unacceptable.
2.6.2.2 Tags shall normally be attached to the gland bolting. Tags on valves that do not have gland bolting
may be attached to the handwheel or other appropriate location. Attachment of tags through bolt holes of
end flanges is not permitted.
2.6.2.3 Each tag shall be clearly stamped with the Item Code Number and the PO Number. Ink or paint is
not acceptable for marking. The Item Code Number is the number appearing directly above the first line of
each Item Description on the Bills of Material.
2.6.2.4 If the Item Description specifies that the valve is for a specific service, the supplier shall attach an
additional tag spelling out this requirement.
Example: FOR CHLORINE SERVICE
2.6.2.5 The minimum dimensions for tags and wire shall be in accordance with the following:
a. Size of tag Round 1-1/2 inches (40 mm) diameter
Rectangular 1/2 inches by 2-3/4 inches (12 mm by 70 mm)
Thickness of tag 16 B and S Gage 0.051 inch (1.2 mm) minimum
b. Lettering height 1/4 of an inch (6 mm) minimum
c. Wire diameter 16 B and S Gage 0.051 inch (1.2 mm) minimum
Note. Proper tagging is essential in the Contractor material management system.
The Supplier must comply with this requirement.
2.7 Preparation For Shipment
2.7.1 Gate and globe valves shall be in the closed position for shipment.
2.7.2 Valves shall be shipped with the correct stem packing installed and with the gland follower
sufficiently tightened to prevent loss of packing gland bolting during shipment.
2.7.3 Valves shall be prepared in such a manner as to avoid damage or atmospheric corrosion to inside or
outside surfaces or parts, during storage or while in transit. Use API 600 as a minimum standard of
acceptance.
2.7.4 Unmachined exterior surfaces of the shell of ferritic valves shall be painted. Austenitic stainless steel
valves shall not be painted.
2.7.5 Austenitic stainless steel valves shall be protected from chlorine attack such as might occur from
exposure to saltwater spray or atmosphere during shipment, cleaning, fabrication, testing, and storage.
Protection shall also be provided if shipping by truck in areas where road salt is used. Consideration shall
be given to enclosing or wrapping in a vapor proof barrier material.
2.7.6 Unless export packaging is specified, valves may be shipped loose or packed in a box or crate.
2.7.7 If export packaging is specified, valves shall be shipped in wooden boxes or crates, individually or
collectively, in a manner to prevent shifting within the container.
2.7.8 Threaded and socketweld openings shall be closed with plastic or metal protectors to exclude dirt and
other foreign matter from the interior of the valves.
2.7.9 Flange facings and butt welding ends shall be protected over the entire gasket seating surface or
weld end with high-impact plastic covers, and secured with lock plugs (integral or separate) or steel
strapping. Plastic end protectors of at least 1/2 of an inch (12 mm) thickness, secured with at least 4 bolts
or with steel strapping, are also acceptable. Cardboard or pressboard end protectors (which absorb water)
are unacceptable.
2.7.10 Carbon steel and ferritic alloy steel flanged and butt weld end valves shall have end flange facing
and bevels coated with a peelable or solvent-removable rust-preventative coating before the end
protectors are applied.
3. Execution
Not applicable.
4. Attachments
Not applicable.
End of Specification