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

API STANDARD 600

THIRTEENTH EDITION, JANUARY 2015 EFFECTIVE DATE: JULY 2015

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Contents

Page

1. Scope 1

2. Normative References 1

3. Terms and Definitions 2

4. Pressure/Temperature Ratings 3

5. Design 3

   1. Body Wall Thickness 3

   2. Bonnet Wall Thickness 4

   3. Body Dimensions 4

   4. Bonnet. 8

   5. Bonnet-to-body Joint 8

   6. Gate 9

   7. Yoke 10

   8. Stem and Stem Nut 11

   9. Packing and Packing Box 14

   10. Bolting 15

   11. Operation 15

   12. Bypasses and Other Auxiliary Connections 15

6. Materials 16

   1. Materials Other Than Trim Materials 16

   2. Trim 17

7. Testing, Inspection and Examination 17

   1. Inspection and Examination 17

   2. Pressure Tests 17

   3. Repairs of Defects 17

8. Marking 21

   1. General 21

   2. Marking for Unidirectional Valves 21

9. Preparation for Shipment 21

   1. Coatings 21

   2. Openings 21

   3. Gate Position 21

   4. Stem Packing 22

   5. Packaging 22

   6. Purchase Order Information 22

Annex A (informative) API Monogram Program Use of the API Monogram by Licensees 23

Annex B (normative) Information to be Specified by the Purchaser 27

Annex C (informative) Identification of Valve Terms 29

Annex D (informative) Valve Material Combinations 30

Bibliography 33

Contents

Figures

Page

1. Identification of Terms 4

2. Types of Valve Gates 10

3. Wear Travel 11

C.1 Valve Nomenclature 29

Tables

1. Minimum Wall Thickness for Body and Bonnet 5

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

3. Minimum Inside Diameter for Sizes DN 800 to DN 1050 (NPS 32 to NPS 42) in Classes 150 and 300 . . . 7 4 Minimum Wear Travel and Maximum Stem Projection 11

1. Minimum Stem Diameter 12

   5A Permitted Undertolerance 13

2. Nominal Radial Width of Packing 14

3. Materials for Parts 16

4. Nominal Seating Surface, Stem and Backseat Bushing or Weld-deposit Materials and Hardness 18

5. Trim Numbers and Alternative Trim Numbers 21

1. Material Combinations for Group 1 Body, Bonnet and Cover Materials 30

2. Material Combinations for Group 2 Body to Bonnet Materials 31

3. Alternative Body to Bonnet Bolting Materials 32

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

1. Scope

   This 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 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 DN:

   
   

   — 25, 32, 40, 50, 65, 80, 100, 150, 200, 250, 300, 350, 400, 450, 500, 600, 650, 700, 750, 800, 850, 900, 950,

   1000, 1050;

   
   

   corresponding to 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, 26, 28, 30, 32, 34, 36, 38, 40, 42;

   
   

   and applies to pressure class designations:

   
   

   — 150, 300, 600, 900, 1500, 2500.

   
   

   If product is supplied bearing the API Monogram and manufactured at a facility licensed by API, the requirements of Annex A apply.

   
   

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

API Standard 624, Type Testing of Rising Stem Valves Equipped with Graphite Packing for Fugitive Emissions

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

1 ASME International, 2 Park Avenue, New York, New York 10016-5990, www.asme.org.

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