Steel Gate Valves—Flanged and Butt-welding Ends, Bolted Bonnets

Downstream Segment

API STANDARD 600

TWELFTH EDITION, MARCH 2009 EFFECTIVE DATE: SEPTEMBER 1, 2009

ERRATA 1, NOVEMBER 2009

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Contents

Page

1. Scope 1

2. Normative References 1

3. Definitions 3

4. Pressure/Temperature Ratings 3

5. Design 4

   1. Body Wall Thickness 4

   2. Bonnet Wall Thickness 5

   3. Body Dimensions 5

   4. Bonnet Dimensions 7

   5. Bonnet-to-body Joint 7

   6. Gate 8

   7. Yoke 9

   8. Stem and Stem Nut 9

   9. Packing and Packing Box 11

   10. Bolting 12

   11. Operation 12

   12. Bypasses and Other Auxiliary Connections 13

6. Materials 13

   1. Materials Other Than Trim Materials 13

   2. Trim 13

7. Testing, Inspection and Examination 14

   1. Inspection and Examination 14

   2. Pressure Tests 14

   3. Repairs of Defects 14

8. Marking 14

   1. General 14

   2. Marking for Unidirectional Valves 15

9. Preparation for Shipment 15

   1. Coatings 15

   2. Openings 15

   3. Gate Position 15

   4. Stem Packing 15

   5. Packaging 15

Annex A (informative) Information to be Specified by the Purchaser 18

Annex B (informative) Identification of Valve Terms 20

Annex C (informative) Valve Material Combinations 21

Figures

1. Identification of Terms 4

2. Types of Valve Gates 8

B.1 Valve Nomenclature 20

Tables

1. Minimum Wall Thickness for Body and Bonnet 4

   Page

2. Minimum Wall Thickness for Bonnet Neck Extension 5

3. Post Weld Heat Treatment for Flange to Body Weld 6

4. Minimum Wear Travel 9

5. Minimum Stem Diameter 10

   5A Permitted Undertolerance 10

6. Nominal Radial Width of Packing 11

7. Materials for Parts 13

8. Nominal Seating Surface, Stem and Backseat Bushing or Weld-deposit Materials and Hardness 16

9. Trim Numbers and Alternative Trim Numbers 17

1. Material Combinations for Group 1 Body, Bonnet and Cover Materials 21

2. Material Combinations for Group 2 Body to Bonnet Materials 22

3. Alternative Body to Bonnet Bolting Materials 23

Steel Gate Valves—Flanged and Butt-welding Ends, Bolted Bonnets

1. Scope

   This International standard specifies the requirements for a heavy-duty series of bolted bonnet steel gate valves for petroleum refinery and related applications where corrosion, erosion and other service conditions would indicate a need for full port openings, heavy wall sections and large stem diameters.

   
   

   This International standard sets forth the requirements for the following gate valve features:

   
   

   • bolted bonnet,

     
     

   • outside screw and yoke,

     
     

   • rising stems,

     
     

   • non-rising handwheels,

     
     

   • single or double gate,

     
     

   • wedge or parallel seating,

     
     

   • metallic seating surfaces,

     
     

   • flanged or butt-welding ends.

   
   

   It covers valves of the nominal pipe sizes NPS:

   
   

   — 1; 1 1/4; 1 1/2; 2; 2 1/2; 3; 4; 6; 8; 10; 12; 14; 16; 18; 20; 24,

   
   

   corresponding to nominal pipe sizes DN:

   
   

   — 25; 32; 40; 50; 65; 80; 100; 150; 200; 250; 300; 350; 400; 450; 500; 600,

   
   

   applies for pressure class designations:

   
   

   — 150; 300; 600; 900; 1500; 2500.

   
   

2. Normative References

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

API Standard 598, Valve Inspection and Testing

ASME B1.1 1, Unified Inch Screw Threads (UN and UNR Thread Form)

ASME B1.5, Acme Screw Threads

ASME B1.8, Stub Acme Screw Threads

ASME B1.12, Class 5 Interference—Fit Thread

1. ASME International, 3 Park Avenue, New York, New York 10016-5990, www.asme.org.

   1

2. API STANDARD 600

ASME B1.20.1, Pipe Threads, General Purpose (Inch)

ASME B16.5, Pipe Flanges and Flanged Fittings NPS 1/2 through NPS 24 Metric/Inch

ASME B16.10, Face-to Face and End-to-End Dimensions of Valves ASME B16.11, Forged Steel Fittings, Socket-Welding and Threaded ASME B16.25, Buttwelding Ends

ASME B16.34, Valves—Flanged, Threaded and Welding End

ASME B18.2.2, Square and Hex Nuts (Inch Series)

ASME B18.2.4.6M, Metric Heavy Hex Nuts

ASME B36.10M, Welded and Seamless Wrought Steel Pipe

ASME Boiler and Pressure Vessel Code (BPVC), Section IX: Welding and Brazing Qualifications

ASTM A193 2, Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for High Temperature of High Pressure Service and Other Special Purpose Applications

ASTM A194, Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both

ASTM A307, Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength

EN 1092-1 3, Flanges and their joints—Circular flanges for pipes, valves, fittings and accessories, PN designated— Part 1: Steel flanges

ISO 7-1 4, Pipe threads where pressure-tight joints are made on the threads—Part 1: Dimensions, tolerances and designation

ISO 5210, Industrial valves—Multi-turn valve actuator attachments

ISO 5752, Metal valves for use in flanged pipe systems—Face-to-face and centre-to-face dimensions

ISO 6708, Pipework components—Definition and selection of DN (nominal size)

ISO 9606-1, Approval testing of welders—Fusion welding—Part 1: Steels

ISO 15607, Specification and qualification of welding procedures for metallic materials—General rules

ISO 15649, Petroleum and natural gas industries—Piping

MSS SP-55 5, Quality Standard for Steel Castings for Valves, Flanges and Fittings and Other Piping Components — Visual Method for Evaluation of Surface Irregularities

NACE MR 0103 6, Materials Resistant to Sulfide Stress Cracking in Corrosive Petroleum Refining Environments

1. ASTM International, 100 Barr Harbor Drive, West Conshohocken, Pennsylvania 19428, www.astm.org.

2. European Committee for Standardization, Avenue Marnix 17, B-1000, Brussels, Belgium, www.cen.eu.

3. International Organization for Standardization, 1, ch. de la Voie-Creuse, Case postale 56, CH-1211, Geneva 20, Switzerland, www.iso.org.

4. Manufacturers Standard Society of the Valve and Fittings Industry, Inc., 127 Park Street, N.E., Vienna, Virginia 22180-4602, www.mss-hq.com.

5. NACE International (formerly the National Association of Corrosion Engineers), 1440 South Creek Drive, Houston, Texas 77218-8340, www.nace.org.