1 Scope
This standard specifies requirements for the design, manufacturing, testing and documentation of ball, check, gate and plug valves for application in pipeline systems for the petroleum and natural gas industries.
This standard is applicable to ball, check, gate and plug valves for application in pipeline system meeting the requirements of GB/T 24259 Petroleum and Natural Gas Industries - Pipeline Transportation Systems for the petroleum and natural gas industries.
This standard is not applicable to subsea pipeline valve. This standard is not applicable to valves for pressure ratings exceeding PN 420 (Class 2500).
Annex A provides the order guide which is contibuted for the purchaser to determine the valves type and special requirements for the valves.
2 Normative References
The following documents are indispensable for the application of this standard.For dated references, only the edition cited applies. For undated references, the latest edition (including all amendments, corrigenda and records of maintenance bodies) of the referenced documents applies.
GB/T 229 Metallic Materials - Charpy Pendulum Impact Test Method (GB/T 229 – 2007, ISO 148-1:2006, MOD)
GB/T 1048 Pipework Components--Definition and Selection of PN (GB/T 1048 - 2005, ISO/ CD 7268:1996, NEQ)
GB 3101 General Principles Concerning Quantities, Units and Symbols (GB 3101 - 1992, ISO 31:1992, IDT)
GB/T 7307 Pipe Threads with 55 Degree Thread Angle where Pressure-tight Joints are Made on the Threads (GB/T 7307 – 2001, eqv ISO 228-1:1994)
GB/T 9445 Non-destructive Testing - Qualification and Certification of Personnel (GB/T 9445-2008, ISO 9712:2005, IDT)
GB/T 12223 Part-Turn Valve Actuator Attachments (GB/T 12223-2005, ISO 5211:2001, MOD)
GB/T 12716 Pipe Threads with the Thread Angle of 60 Degrees Where Pressure-tight Joints are Made on the Threads
GB/T 13927 Industrial Valves - Pressure Testing (GB/T 13927-2008, ISO 5208:2008, NEQ)
GB/T 19866 Specification and Qualification of Welding Procedures for Metallic Materials - General Rules (GB/T 19866-2005, ISO 15607: 2003, IDT)
GB/T 19867 (all parts) Welding Procedure Specification [GB/T 19867 - 2008, eqv ISO 15609 (all parts) :2004].
GB/T 19869.1 Welding Procedure Qualification Test for Steels, Nickel and Nickel Alloys (GB/T 19869.1- 2005, ISO 15614-1:2004, IDT)
GB/T 20972 (all parts) Petroleum and Natural Gas Industries - Material for Use in H2S-Containing Environments in Oil and Gas Production [GB/T 20972, ISO 15156: 2003 (all parts), MOD]
GB/T 24259 Petroleum and Natural Gas Industries - Pipeline Transportation Systems (GB/T 24259-2009, ISO 13623:2000, MOD)
GB/T 26952-2011 Non-destructive Testing of Welds - Magnetic Particle Testing of Welds - Acceptance Levels (ISO 23278:2006, MDD)
GB/T 26953-2011 Non-destructive Testing of Welds - Penetrant Testing of Welds - Acceptance Levels (ISO 23277:2006, MOD)
SY/T 6960 Testing of Valves - Fire Type-Testing Requirements
ISO 9606-1 Approval Testing of Welders - Fusion Welding - Part l: Steels
ISO 10497 Testing of Valves Fire Type--Testing Requirements
ASME B 16.34:2009 Valves, Flanged, Threaded, and Welding End
ASME Boiler and Pressure Vessel Code SectionⅧ: Rules for Construction of Pressure Vessels Division l: Rules for Construction of Pressure Vessel)
ASME Boiler and Pressure Vessel Code SectionⅧ: Rules for Construction of Pressure Vessels Division 2: Alternative Rules
ASME Boiler and Pressure Vessel Code Section Ⅸ: Welding and Brazing Qualifications
ASME Boiler and Pressure Vessel Code SectionV: Nondestructive Examination)
ASME B 16.10 - 2009 Face-to-Face and End-to-End Dimensions of Valves
ASME B 16.5 - 2009 Pipe Flanges and Flanged Fittings: NPS1/2 through 24
ASME B 31.4 - 2006 Pipeline Transportation Systems for Liquid Hydrocarbons and Other Liquids)
ASME B 31.8 - 2007 Gas Transmission and Distribution Piping Systems
ASME B 16.47 2006 large Diameter Steel Flanges: NPS26 through NPS 60 Metric/Inch Standard
ASTM A 370 Standard Test Methods and Definitions for Mechanical Testing of Steel Products
ASTM A 320 Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Service
ASTM A 388 Standard Practice for Ultrasonic Examination of Heavy Steel Forgings
ASTM A 435 Standard Specification for Straight-Beam Ultrasonic Examination of Steel Plates
ASTM A 577 Standard Specification for Ultrasonic Angle-Beam Examination of Steel Plates
ASNT SNT-TC-IA Recommended Practice No. SNTTC-lA Personnel Qualification and Certification
AWS QC l AWS Standard for AWS Certification of Welding Inspectors
EN 1092-1 Flanges and their Joints--Circular Flanges for Pipes, Valves, Fittings and Accessories, PN Designated - Part l: Steel Flanges
EN 287-1 Qualification Test of Welders Fusion Welding Part 1: Steels
EN 10204:2004 Metallic Products - Type of Inspection Documents
EN 473 Non-destructive Testing Qualification and Certification of NDT Personnel)
MSS SP-55 Quality Standard for Steel Castings for Valves, Flanges and Fittings and Other Piping Components - Visual Method for Evaluation of Surface Irregularities
MSS SP-44 Steel Pipeline Flanges
3 Conformance
3.1 Units of Measurement
In this standard, data are expressed in China legal measurement units which are put into the parentheses thereafter; "inches" and "minutes" are changed to "in" and "min". The ASME rating class uses "Class" as a symbol and figures follows.
3.2 Rounding
Except as otherwise required by this standard, to determine conformance with the specified requirements, measured or calculated values shall be rounded to the smallest integer in the right-hand place of figures used in expressing the limiting value, in accordance with the rounding method of GB 3101, Annex B.
3.3 Compliance to Standard
A quality system shall be applied to assist compliance with the requirements of this standard.
The manufacturer shall be responsible for complying with all of the applicable requirements of this standard. It shall be permissible for the purchaser to make any investigation necessary in order to be assured of compliance by the manufacturer and to reject any material that does not comply.
3.4 Process to be Verified
When the output results fail to be verified by subsequent monitoring or measuring method in the process, the following ones shall be confirmed.
The following confirmation shall be compliant with the quality system of the manufacturer:
a) Non-destructive examination (NDE) - refer to 10.1;
b) Welding - refer to 9.0;
c) Heat treatment - refer to 8.1;
d) Painting likely to influence product performance, by agreement.
4 Terms and Definitions
For the purpose of this standard, the following terms and definitions apply.
4.1
ASME rating Class
Numerical pressure design class defined in ASME B16.34 and used for reference for valve parameter.
Note: The ASME rating class is designated by the word “class” followed by a number in this standard.
4.2
Bi-directional valve
Valve designed for blocking the fluid in both downstream and upstream directions in closed position.
4.3
Bleed
Drain or vent.
4.4
Block valve
Gate, plug or ball valve that blocks flow into the downstream conduit when in the closed position.
Note: Valves are either single- or double-seated, bi-directional or uni-directional.
4.5
Breakaway thrust/breakaway torque
Maximum thrust or torque required to operate a valve at maximum pressure differential.
4.6
By agreement
Agreed between manufacturer and purchaser.
4.7
Double- block-and-bleed valve; DBB
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 (4.8).
4.8
Double-isolation-and-bleed valve; DIB
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.
4.9
Drive train
All parts of a valve drive between the operator and the obturator, including the obturator but excluding the operator.
4.10
Flow coefficient
KV
Volumetric flow rate of water at a temperature between 5℃ (40°F) and 40℃ (104°F) passing through a valve and resulting in a pressure loss of 0.1 MPa (1 bar, 14.7 bf/in2), and expressed in m3/h.
Note: Kv is related to the flow coefficient Cv, expressed in units of US gallons per minute at 15.6℃ (60 °F) resulting in a 1 bf /in2 pressure drop as given by KV =CV /1.156.
4. 11
Full-opening valve
Valve with an unobstructed opening, not smaller than the internal bore of the end connections.
4.12
Hand wheel
Wheel consisting of a rim connected to a hub, for example by spokes, and used to manually operate a valve requiring multiple turns.
4.13
Locking device
Part or an arrangement of parts for securing a valve in the open and/or closed position.
4.14
Manual actuator/manual operator
Wrench (lever) or hand-wheel with or without a gearbox.
4.15
Maximum pressure differential; MPD
Maximum difference between the upstream and downstream pressure across the obturator at which the obturator may be operated.
4.16
Nominal pipe size; NPS
Numerical imperial designation of size which is common to components in piping systems of any one size.
Note: Nominal pipe size is designated by the abbreviation “NPS” followed by a number.
4.17
Nominal pressure class
PN
Numerical pressure design class as defined in GB/T 1048-2005 and used for reference purposes for valve parameter.
Note: Nominal pressure (PN) class is designated by the abbreviation “PN” followed by a number.
4.18
Nominal size
DN
Numerical metric designation of size that is common to components in piping systems of any one size.
Note: Nominal size is designated by the abbreviation “DN” followed by a number.
4.19
Obturator/closure member
Part of a valve, such as a ball, clapper, disc, gate or plug that is positioned in the flow stream to permit or prevent flow.
4.20
Operator
Device (or assembly) for opening or closing a valve.
4.21
Packing gland
Component used to compress the stem packing.
4.22
Position indicator
Device to show the position of the valve obturator.
4.23
Pigability
Capability of a valve to permit the unrestricted passage of a pig.
4.24
Powered actuator/powered operator
Electric, hydraulic or pneumatic device bolted or otherwise attached to the valve for powered opening and closing of the valve.
4.25
Pressure class
Numerical pressure design class expressed in accordance with either the nominal pressure (PN) class or the ASME rating class.
Note: In this standard, the pressure class is stated by the PN class followed by the ASME rating class between brackets.
4.26
Pressure-containing parts
Parts, which are able to bear the pressure of medium contained in pipeline and whose failure to function as intended results in a release of the medium into the environment.
Foreword I
1 Scope
2 Normative References
3 Conformance
3.1 Units of Measurement
3.2 Rounding
3.3 Compliance to Standard
3.4 Process to be Verified
4 Terms and Definitions
5 Symbols and Abbreviated Term
5.1 Symbols
6 Valve Types and Configurations
6.1 Valve Types
6.2 Valve Configurations
7 Design
7.1 Design Standards and Calculations
7.2 Pressure and Temperature Rating
7.3 Sizes
7.4 Face-to-Face and End-to-End Dimensions
7.5 Valve Operation
7.6 Pigging
7.7 Valve Ends
7.8 Pressure Relief
7.9 Bypasses, Drains and Vents
7.10 Injection Points
7.11 Drain, Vent and Sealant Lines
8 Materials
8.1 Material Specification
8.2 Service Compatibility
8.3 Forgings
8.4 Composition Limits
8.5 Impact Toughness Test Requirements
8.6 Bolting
8.7 Sour Service
8.8 Vent and Drain Connections
8.9 Heat Treatment Qualifications
9 Welding
9.1 Qualifications
9.2 Impact Test
9.3 Hardness test
9.4 Repair Welding
10 Quality Control
10.1 NDE Requirements
10.2 Measuring and Test Equipment
10.3 Qualification of Inspection and Test Personnel
10.4 NDE of Repairs
10.5 NDE of Welding End
10.6 Visual Inspection of Castings
11 Pressure Test
11.1 General
11.2 Stem Backseat Test
11.3 Hydrostatic Shell Test
11.4 Hydrostatic Seat Test
11.5 Testing of Drain, Vent and Sealant Injection Lines
11.6 Draining
12 Coating
13 Marking
14 Preparation for Shipment
15 Documentation
Annex A (Informative) Purchasing Guidelines
Annex B (Normative) Requirements for Non-destructive Examination
Annex C (Normative) Supplementary Test Requirements
Annex D (Informative) Supplementary Documentation Requirements
Annex E (Informative) Recommended Practice of Heat Treatment Equipment
Annex F (Informative) Hydrostatic Shell Extension Testing Requirements and Record Keeping Period for Valves in Piping System within Judicial Jurisdiction
Annex G (Informative) Quality Specification Level of Pipeline Valves
References
1 Scope
This standard specifies requirements for the design, manufacturing, testing and documentation of ball, check, gate and plug valves for application in pipeline systems for the petroleum and natural gas industries.
This standard is applicable to ball, check, gate and plug valves for application in pipeline system meeting the requirements of GB/T 24259 Petroleum and Natural Gas Industries - Pipeline Transportation Systems for the petroleum and natural gas industries.
This standard is not applicable to subsea pipeline valve. This standard is not applicable to valves for pressure ratings exceeding PN 420 (Class 2500).
Annex A provides the order guide which is contibuted for the purchaser to determine the valves type and special requirements for the valves.
2 Normative References
The following documents are indispensable for the application of this standard.For dated references, only the edition cited applies. For undated references, the latest edition (including all amendments, corrigenda and records of maintenance bodies) of the referenced documents applies.
GB/T 229 Metallic Materials - Charpy Pendulum Impact Test Method (GB/T 229 – 2007, ISO 148-1:2006, MOD)
GB/T 1048 Pipework Components--Definition and Selection of PN (GB/T 1048 - 2005, ISO/ CD 7268:1996, NEQ)
GB 3101 General Principles Concerning Quantities, Units and Symbols (GB 3101 - 1992, ISO 31:1992, IDT)
GB/T 7307 Pipe Threads with 55 Degree Thread Angle where Pressure-tight Joints are Made on the Threads (GB/T 7307 – 2001, eqv ISO 228-1:1994)
GB/T 9445 Non-destructive Testing - Qualification and Certification of Personnel (GB/T 9445-2008, ISO 9712:2005, IDT)
GB/T 12223 Part-Turn Valve Actuator Attachments (GB/T 12223-2005, ISO 5211:2001, MOD)
GB/T 12716 Pipe Threads with the Thread Angle of 60 Degrees Where Pressure-tight Joints are Made on the Threads
GB/T 13927 Industrial Valves - Pressure Testing (GB/T 13927-2008, ISO 5208:2008, NEQ)
GB/T 19866 Specification and Qualification of Welding Procedures for Metallic Materials - General Rules (GB/T 19866-2005, ISO 15607: 2003, IDT)
GB/T 19867 (all parts) Welding Procedure Specification [GB/T 19867 - 2008, eqv ISO 15609 (all parts) :2004].
GB/T 19869.1 Welding Procedure Qualification Test for Steels, Nickel and Nickel Alloys (GB/T 19869.1- 2005, ISO 15614-1:2004, IDT)
GB/T 20972 (all parts) Petroleum and Natural Gas Industries - Material for Use in H2S-Containing Environments in Oil and Gas Production [GB/T 20972, ISO 15156: 2003 (all parts), MOD]
GB/T 24259 Petroleum and Natural Gas Industries - Pipeline Transportation Systems (GB/T 24259-2009, ISO 13623:2000, MOD)
GB/T 26952-2011 Non-destructive Testing of Welds - Magnetic Particle Testing of Welds - Acceptance Levels (ISO 23278:2006, MDD)
GB/T 26953-2011 Non-destructive Testing of Welds - Penetrant Testing of Welds - Acceptance Levels (ISO 23277:2006, MOD)
SY/T 6960 Testing of Valves - Fire Type-Testing Requirements
ISO 9606-1 Approval Testing of Welders - Fusion Welding - Part l: Steels
ISO 10497 Testing of Valves Fire Type--Testing Requirements
ASME B 16.34:2009 Valves, Flanged, Threaded, and Welding End
ASME Boiler and Pressure Vessel Code SectionⅧ: Rules for Construction of Pressure Vessels Division l: Rules for Construction of Pressure Vessel)
ASME Boiler and Pressure Vessel Code SectionⅧ: Rules for Construction of Pressure Vessels Division 2: Alternative Rules
ASME Boiler and Pressure Vessel Code Section Ⅸ: Welding and Brazing Qualifications
ASME Boiler and Pressure Vessel Code SectionV: Nondestructive Examination)
ASME B 16.10 - 2009 Face-to-Face and End-to-End Dimensions of Valves
ASME B 16.5 - 2009 Pipe Flanges and Flanged Fittings: NPS1/2 through 24
ASME B 31.4 - 2006 Pipeline Transportation Systems for Liquid Hydrocarbons and Other Liquids)
ASME B 31.8 - 2007 Gas Transmission and Distribution Piping Systems
ASME B 16.47 2006 large Diameter Steel Flanges: NPS26 through NPS 60 Metric/Inch Standard
ASTM A 370 Standard Test Methods and Definitions for Mechanical Testing of Steel Products
ASTM A 320 Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Service
ASTM A 388 Standard Practice for Ultrasonic Examination of Heavy Steel Forgings
ASTM A 435 Standard Specification for Straight-Beam Ultrasonic Examination of Steel Plates
ASTM A 577 Standard Specification for Ultrasonic Angle-Beam Examination of Steel Plates
ASNT SNT-TC-IA Recommended Practice No. SNTTC-lA Personnel Qualification and Certification
AWS QC l AWS Standard for AWS Certification of Welding Inspectors
EN 1092-1 Flanges and their Joints--Circular Flanges for Pipes, Valves, Fittings and Accessories, PN Designated - Part l: Steel Flanges
EN 287-1 Qualification Test of Welders Fusion Welding Part 1: Steels
EN 10204:2004 Metallic Products - Type of Inspection Documents
EN 473 Non-destructive Testing Qualification and Certification of NDT Personnel)
MSS SP-55 Quality Standard for Steel Castings for Valves, Flanges and Fittings and Other Piping Components - Visual Method for Evaluation of Surface Irregularities
MSS SP-44 Steel Pipeline Flanges
3 Conformance
3.1 Units of Measurement
In this standard, data are expressed in China legal measurement units which are put into the parentheses thereafter; "inches" and "minutes" are changed to "in" and "min". The ASME rating class uses "Class" as a symbol and figures follows.
3.2 Rounding
Except as otherwise required by this standard, to determine conformance with the specified requirements, measured or calculated values shall be rounded to the smallest integer in the right-hand place of figures used in expressing the limiting value, in accordance with the rounding method of GB 3101, Annex B.
3.3 Compliance to Standard
A quality system shall be applied to assist compliance with the requirements of this standard.
The manufacturer shall be responsible for complying with all of the applicable requirements of this standard. It shall be permissible for the purchaser to make any investigation necessary in order to be assured of compliance by the manufacturer and to reject any material that does not comply.
3.4 Process to be Verified
When the output results fail to be verified by subsequent monitoring or measuring method in the process, the following ones shall be confirmed.
The following confirmation shall be compliant with the quality system of the manufacturer:
a) Non-destructive examination (NDE) - refer to 10.1;
b) Welding - refer to 9.0;
c) Heat treatment - refer to 8.1;
d) Painting likely to influence product performance, by agreement.
4 Terms and Definitions
For the purpose of this standard, the following terms and definitions apply.
4.1
ASME rating Class
Numerical pressure design class defined in ASME B16.34 and used for reference for valve parameter.
Note: The ASME rating class is designated by the word “class” followed by a number in this standard.
4.2
Bi-directional valve
Valve designed for blocking the fluid in both downstream and upstream directions in closed position.
4.3
Bleed
Drain or vent.
4.4
Block valve
Gate, plug or ball valve that blocks flow into the downstream conduit when in the closed position.
Note: Valves are either single- or double-seated, bi-directional or uni-directional.
4.5
Breakaway thrust/breakaway torque
Maximum thrust or torque required to operate a valve at maximum pressure differential.
4.6
By agreement
Agreed between manufacturer and purchaser.
4.7
Double- block-and-bleed valve; DBB
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 (4.8).
4.8
Double-isolation-and-bleed valve; DIB
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.
4.9
Drive train
All parts of a valve drive between the operator and the obturator, including the obturator but excluding the operator.
4.10
Flow coefficient
KV
Volumetric flow rate of water at a temperature between 5℃ (40°F) and 40℃ (104°F) passing through a valve and resulting in a pressure loss of 0.1 MPa (1 bar, 14.7 bf/in2), and expressed in m3/h.
Note: Kv is related to the flow coefficient Cv, expressed in units of US gallons per minute at 15.6℃ (60 °F) resulting in a 1 bf /in2 pressure drop as given by KV =CV /1.156.
4. 11
Full-opening valve
Valve with an unobstructed opening, not smaller than the internal bore of the end connections.
4.12
Hand wheel
Wheel consisting of a rim connected to a hub, for example by spokes, and used to manually operate a valve requiring multiple turns.
4.13
Locking device
Part or an arrangement of parts for securing a valve in the open and/or closed position.
4.14
Manual actuator/manual operator
Wrench (lever) or hand-wheel with or without a gearbox.
4.15
Maximum pressure differential; MPD
Maximum difference between the upstream and downstream pressure across the obturator at which the obturator may be operated.
4.16
Nominal pipe size; NPS
Numerical imperial designation of size which is common to components in piping systems of any one size.
Note: Nominal pipe size is designated by the abbreviation “NPS” followed by a number.
4.17
Nominal pressure class
PN
Numerical pressure design class as defined in GB/T 1048-2005 and used for reference purposes for valve parameter.
Note: Nominal pressure (PN) class is designated by the abbreviation “PN” followed by a number.
4.18
Nominal size
DN
Numerical metric designation of size that is common to components in piping systems of any one size.
Note: Nominal size is designated by the abbreviation “DN” followed by a number.
4.19
Obturator/closure member
Part of a valve, such as a ball, clapper, disc, gate or plug that is positioned in the flow stream to permit or prevent flow.
4.20
Operator
Device (or assembly) for opening or closing a valve.
4.21
Packing gland
Component used to compress the stem packing.
4.22
Position indicator
Device to show the position of the valve obturator.
4.23
Pigability
Capability of a valve to permit the unrestricted passage of a pig.
4.24
Powered actuator/powered operator
Electric, hydraulic or pneumatic device bolted or otherwise attached to the valve for powered opening and closing of the valve.
4.25
Pressure class
Numerical pressure design class expressed in accordance with either the nominal pressure (PN) class or the ASME rating class.
Note: In this standard, the pressure class is stated by the PN class followed by the ASME rating class between brackets.
4.26
Pressure-containing parts
Parts, which are able to bear the pressure of medium contained in pipeline and whose failure to function as intended results in a release of the medium into the environment.
Contents of GB/T 20173-2013
Foreword I
1 Scope
2 Normative References
3 Conformance
3.1 Units of Measurement
3.2 Rounding
3.3 Compliance to Standard
3.4 Process to be Verified
4 Terms and Definitions
5 Symbols and Abbreviated Term
5.1 Symbols
6 Valve Types and Configurations
6.1 Valve Types
6.2 Valve Configurations
7 Design
7.1 Design Standards and Calculations
7.2 Pressure and Temperature Rating
7.3 Sizes
7.4 Face-to-Face and End-to-End Dimensions
7.5 Valve Operation
7.6 Pigging
7.7 Valve Ends
7.8 Pressure Relief
7.9 Bypasses, Drains and Vents
7.10 Injection Points
7.11 Drain, Vent and Sealant Lines
8 Materials
8.1 Material Specification
8.2 Service Compatibility
8.3 Forgings
8.4 Composition Limits
8.5 Impact Toughness Test Requirements
8.6 Bolting
8.7 Sour Service
8.8 Vent and Drain Connections
8.9 Heat Treatment Qualifications
9 Welding
9.1 Qualifications
9.2 Impact Test
9.3 Hardness test
9.4 Repair Welding
10 Quality Control
10.1 NDE Requirements
10.2 Measuring and Test Equipment
10.3 Qualification of Inspection and Test Personnel
10.4 NDE of Repairs
10.5 NDE of Welding End
10.6 Visual Inspection of Castings
11 Pressure Test
11.1 General
11.2 Stem Backseat Test
11.3 Hydrostatic Shell Test
11.4 Hydrostatic Seat Test
11.5 Testing of Drain, Vent and Sealant Injection Lines
11.6 Draining
12 Coating
13 Marking
14 Preparation for Shipment
15 Documentation
Annex A (Informative) Purchasing Guidelines
Annex B (Normative) Requirements for Non-destructive Examination
Annex C (Normative) Supplementary Test Requirements
Annex D (Informative) Supplementary Documentation Requirements
Annex E (Informative) Recommended Practice of Heat Treatment Equipment
Annex F (Informative) Hydrostatic Shell Extension Testing Requirements and Record Keeping Period for Valves in Piping System within Judicial Jurisdiction
Annex G (Informative) Quality Specification Level of Pipeline Valves
References
