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

API STANDARD 623

FIRST EDITION, SEPTEMBER 2013

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Copyright © 2013 American Petroleum Institute

Foreword

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iii

Contents

Page

1. Scope 1

2. Normative References 1

3. Terms and Definitions 3

4. Pressure/Temperature Ratings 3

5. Design 3

   1. Body Wall Thickness 3

   2. Bonnet Wall Thickness 5

   3. Body Dimensions 5

   4. Bonnet Design 8

   5. Bonnet-to-body Joint 8

   6. Disc 9

   7. Yoke 10

   8. Stem, Stem Nut, and Yoke Bushing 10

   9. Packing and Packing Box 12

   10. Bolting 13

   11. Operation 14

   12. Stop-Check 14

   13. Bypasses and Other Auxiliary Connections 15

6. Materials 15

   1. Materials Other Than Trim Materials 15

   2. Trim 15

7. Testing, Inspection, and Examination 16

   1. Inspection and Examination 16

   2. Pressure Tests 16

   3. Inspection of Castings 19

   4. Repairs of Defects 19

8. Marking 19

   1. General 19

   2. Marking for Flow Direction 19

9. Preparation for Shipment 19

   1. Coatings 19

   2. Openings 19

   3. Disc Position 20

   4. Stem Packing 20

   5. Packaging 20

Annex A (informative) Information to be Specified by the Purchaser 21

Annex B (informative) Identification of Valve Terms 23

Annex C (informative) Valve Material Combinations 24

Bibliography 27

v

Contents

Figures

Page

1. Identification of Terms 4

2. Typical Discs 10

B.1 Valve Nomenclature 23

Tables

1. Minimum Wall Thickness for Body and Bonnet 4

2. Minimum Wall Thickness for Bonnet Neck Extension 6

3. Post Weld Heat Treatment for Flange to Body Weld 7

4. Minimum Seat Diameter 7

5. Minimum Stem Diameter 11

6. Nominal Radial Width of Packing 13

7. Materials for Parts 16

8. Nominal Seating Surface, Stem, and Backseat Bushing or Weld Deposited Materials and Hardness. . 17 9 Trim Numbers and Alternative Trim Numbers 19

1. Material Combinations for Group 1 Body, Bonnet, and Cover Materials 24

2. Material Combinations for Group 2 Body to Bonnet Materials 25

3. Alternative Body to Bonnet Bolting Materials 26

vi

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

1. Scope

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

   
   

   This standard sets forth the requirements for the following globe valve features:

   
   

   • bolted bonnet,

     
     

   • outside screw and yoke,

     
     

   • rotating rising stems, and nonrotating rising stems,

     
     

   • rising handwheels and nonrising handwheels,

     
     

   • conventional, y-pattern, right-angle,

     
     

   • stop-check (nonreturn type globe valves in which the disc may be positioned against the seat by action of the stem, but is free to rise as a check valve due to flow from under the disc, when the stem is in a full or partially open position),

     
     

   • plug, narrow, conical, ball, or guided disc,

     
     

   • metallic seating surfaces,

     
     

   • flanged or butt-welding ends.

   
   

   It covers valves of the nominal pipe sizes NPS:

   
   

   — 2, 21/2, 3, 4, 6, 8, 10, 12, 14, 16, 18, 20, 24;

   
   

   corresponding to nominal pipe sizes DN:

   
   

   — 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)

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

   
   

   1

2. API STANDARD 623

ASME B1.5, Acme Screw Threads

ASME B1.8, Stub Acme Screw Threads

ASME B1.12, Class 5 Interference—Fit Thread

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 B31.3, Process Piping

ASTM A307 2, Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength

ISO 5210 3, 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 15649, Petroleum and natural gas industries—Piping

MSS SP-55 4, Quality Standard for Steel Castings for Valves, Flanges and Fittings and Other Piping Components — Visual Method for Evaluation of Surface Irregularities

MSS SP-102, Multi-turn Valve Actuator Attachment - Flange and Driving Component Dimensions and Performance Characteristics

NACE MR 0103 5, 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. International Organization for Standardization, 1, ch. de la Voie-Creuse, Case postale 56, CH-1211, Geneva 20, Switzerland, www.iso.org.

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

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