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Cover
Special Notes
Foreword
Contents
Introduction
1 Scope
1.1 General
1.2 Conformance
1.3 Conformance with Specification
1.4 Processes Requiring Validation
2 Normative References
3 Terms, Definitions, Acronyms, Abbreviations, Symbols, and Unit
3.1 Terms and Definitions
3.2 Acronyms and Abbreviations
3.3 Symbols and Units
4 Valve Types and Configurations
4.1 Valve Types
4.2 Valve Configurations
5 Design
5.1 Design Standards and Calculations
5.2 Pressure and Temperature Rating
5.3 Sizes
5.4 Face-to-face and End-to-end Dimensions
5.5 Valve Operation
5.6 Pigging
5.7 Valve Ends
5.8 Valve Cavity Pressure Relief
5.9 Drains
5.10 Injection Points
5.11 Drain, Vent, and Sealant Lines
5.12 Drain, Vent, and Sealant Valves
5.13 Handwheels and Wrenches—Levers
5.14 Locking Provision
5.15 Position of the Obturator
5.16 Position Indicators
5.17 Travel Stops
5.18 Actuator, Operators, and Stem Extensions
5.19 Lifting
5.20 Drive Trains
5.21 Stem Retention
5.22 Fire Type-testing
5.23 Antistatic Device
6 Materials
6.1 Material Specification
6.2 Tensile Test Requirements
6.3 Service Compatibility
6.4 Forged Parts
6.5 Composition Limits
6.6 Toughness Test Requirements
6.7 Bolting
6.8 Sour Service
6.9 Drain Connections
6.10 Heat-treating Equipment Qualification
7 Welding
7.1 Welding Consumables
7.2 Welding Procedure and Welder/Welding Operator Qualifications
7.3 Impact Testing
7.4 Hardness Testing
7.5 Repair
7.6 Repair of welds
8 Quality Control
8.1 NDE Requirements
8.2 Measuring and Test Equipment
8.3 Qualification of Personnel
8.4 NDE of Repairs
8.5 Weld End NDE
8.6 Visual Inspection of Castings
8.7 Quality Specification Levels (QSLs)
9 Pressure Testing
9.1 General
9.2 Stem Backseat Test
9.3 Hydrostatic Shell Test
9.4 Hydrostatic Seat Test
9.5 Check Valves
9.6 Testing of Drain, Vent, and Sealant Injection Lines
9.7 Draining
10 Coating/Painting
11 Marking
12 Preparation for Shipment
13 Documentation
14 Facility Requirements
14.1 Minimum Facility Requirements for the Assembler Category of Manufacturing
14.2 Activities Applicable to an Assembler Facility
Annex A (informative) API Monogram ProgramUse of the API Monogram by Licensees
Annex B (informative) Valve Configurations
Annex C (normative) Valve End-to-end and Face-to-face Dimensions
Annex D Guidance for Travel Stops by Valve Type
Annex E (informative) API 20 Series Supply Chain Management
Annex F (normative) Qualification of Heat-treating Equipment
Annex G (normative) Requirements for Nondestructive Examination
Annex H (normative) Supplementary Test Requirements
Annex I (informative) Requirements for Extended Hydrostatic Shell Test Duration and
Records Retention for Valves in Jurisdictional Pipeline Systems
Annex J (normative) Quality Specification Level (QSL) for Pipeline Valves
Annex K (informative) Isolation Valve Features
Annex L (normative) External Coating for End Connections
Annex M (informative) Marking Example
Annex N (informative) Supplementary Documentation Requirements
Annex O (informative) Purchasing Guidelines
Bibliography
Figures
Figure 1—Typical Flange Dimensions
Figure 2—Bolt-hole Misalignment
Figure 3—Charpy V-notch Weld Metal Specimen Location
Figure 4—Charpy V-notch Heat-affected Zone Specimen Location
Figure 5—Typical Identification Plate for a Valve with One Seat Unidirectional and One
Seat Bidirectional
Figure B.1—Expanding-gate/Rising-stem Gate Valve
Figure B.2—Slab-gate/Through-conduit Rising-stem Gate Valve
Figure B.3—Plug Valve
Figure B.4—Top-entry Trunnion Mounted Ball Valve
Figure B.5—Three-piece Trunnion Mounted Ball Valve
Figure B.6—Welded-body Trunnion Mounted Ball Valve
Figure B.7—Reduced-opening Swing Check Valve
Figure B.8—Full-opening Swing Check Valve
Figure B.9—Single-plate Wafer-type Check Valve, Long Pattern
Figure B.10—Typical Dual-plate Wafer-type Check Valve, Long Pattern
Figure B.11—Single-plate Wafer-type Check Valve, Short Pattern
Figure B.12—Axial Flow Check Valve
Figure B.13—Piston Check Valve
Figure B.14—Floating Ball Valve
Figure F.1—Thermocouple Location—Rectangular Furnace (Working Zone)
Figure F.2—Thermocouple Locations—Cylindrical Furnace (Working Zone)
Figure K.1—Block and Bleed—Type A
Figure K.2—Block and Bleed—Type B
Figure K.3—Double Block and Bleed—Type A
Figure K.4—Double Block and Bleed—Type B
Figure K.5—Double Isolation and Bleed—Type A
Figure K.6—Double Isolation and Bleed—Type B
Figure L.1—Raised Face
Figure L.2—Ring Type Joint or Raised Face Ring Type Joint
Figure L.3—Weld End
Figure L.4—Pipe Pup Weld Ends
Tables
Table 1—Minimum Bore for Full-opening Valves
Table 2—Thread/Pipe Sizes for Drains
Table 3—Minimum V-notch Impact Requirements (Full-size Specimen)
Table 4—Minimum Duration of Stem Backseat Tests
Table 5—Minimum Duration of Hydrostatic Shell Tests
Table 6—Minimum Duration of Seat Tests
Table 7—Valve Marking
Table 8—Minimum Facility Requirements
Table C.1—Gate Valves—Face-to-face (A) and End-to-end (B and C) Dimensions
Table C.2—Plug Valves—Face-to-face (A) and End-to-end (B and C) Dimensions
Table C.3—Ball Valves—Face-to-face (A) and End-to-end (B and C ) Dimensions
Table C.4—Check Valves, Full-opening and Reduced Types—Face-to-face (A) and
End-to-end (B and C ) Dimensions
Table C.5—Single- and Dual-plate, Long- and Short-pattern, Wafer-type Check Valves—
Face-to-face Dimensions
Table D.1—Valve Travel Stops
Table H.1—Minimum Duration of Pneumatic Shell and Seat Tests
Table J.1—NDE Requirements
Table J.2—Extent, Method, and Acceptance Criteria of NDE/Item Examination Code
Table J.3—Additional Pressure Testing Requirements
Table J.4—Documentation Requirements
Table K.1—Isolation Valve Types
Table O.1—Valve Datasheet

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