Bolted Bonnet Steel Gate Valves for Petroleum and Natural Gas Industries

ANSI/API STANDARD 600

ELEVENTH EDITION, OCTOBER 2001 REAFFIRMED, NOVEMBER 2006

ISO 10434:2001 (Modified), Bolted bonnet steel gate valves for the petroleum, petrochemical and allied industries

Contents

Important Information Concerning Use of Asbestos or Alternative Materials 3

Special Notes 4

API Foreword 5

ISO Foreword 6

Introduction 7

1. Scope 8

2. Normative references 9

3. Definitions 10

4. Pressure/temperature ratings 10

5. Design 10

   1. Body wall thickness 10

   2. Bonnet wall thickness 11

   3. Body dimensions 12

      1. Flanged ends 12

      2. Butt-welding ends 14

      3. Body seats 15

      4. Openings 16

1. Bonnet dimensions. 16

2. Bonnet-to-body joint 16

3. Gate 18

4. Yoke 18

5. Stem and stem nut 19

6. Packing and packing box 20

7. Bolting. 21

8. Operation 21

9. Auxiliary connections 22

1. Materials 25

   1. Materials other than trim materials 25

   2. Trim 25

   3. Repair 28

2. Testing, inspection and examination 28

   1. Pressure tests 28

      1. Shell test 28

      2. Closure tightness test 29

      3. Backseat test 30

      4. Optional closure tightness test 30

1. Inspection 31

   1. At the valve manufacturer’s factory 31

   2. Other than at the valve manufacturer’s factory 31

   3. Extent of inspection. 31

1. Examination. 31

2. Supplementary examination 31

1. Marking 31

   1. Legibility 31

   2. Body markings 32

   3. Ring joint markings 32

   4. Identification plate marking 32

2. Preparation for despatch 33

Annex A (informative) Information to be specified by the purchaser 34

Annex B (informative) Identification of valves terms 35

Annex C (informative) Modifications to ISO 10434 36

Important Information Concerning Use of Asbestos or Alternative Materials

Asbestos is specified or referenced for certain components of the equipment described in some API standards. It has been of extreme usefulness in minimizing fire hazards associated with petroleum processing. It has also been a universal sealing material, compatible with most refining fluid services.

Certain serious adverse health effects are associated with asbestos, among them the serious and often fatal dis- eases of lung cancer, asbestosis, and mesothelioma (a cancer of the chest and abdominal linings). The degree of exposure to asbestos varies with the product and the work practices involved.

Consult the most recent edition of the Occupational Safety and Health Administration (OSHA), U.S. Department of Labor, Occupational Safety and Health Standard for Asbestos, Tremolite, Anthophyllite, and Actinolite, 29 Code of Federal Regulations, Section 1910.1001; the U.S. Environmental Protection Agency, National Emission Standard for Asbestos, 40 Code of Federal Regulations, Sections 61.140 through 61.156; and the U.S. Environmental Protection Agency (EPA) rule on labeling requirements and phased banning of asbestos products (Sections 763.160-179).

There are currently in use and under development a number of substitute materials to replace asbestos in certain applications. Manufacturers and users are encouraged to develop and use effective substitute materials that can meet the specifications for, and operating requirements of, the equipment to which they would apply.

SAFETY AND HEALTH INFORMATION WITH RESPECT TO PARTICULAR PRODUCTS OR MATERIALS CAN BE OBTAINED FROM THE EMPLOYER, THE MANUFACTURER OR SUPPLIER OF THAT PRODUCT OR MATE- RIAL, OR THE MATERIAL SAFETY DATA SHEET.

Special Notes

API publications necessarily address problems of a general nature. With respect to particular circumstances, local, state, and federal laws and regulations should be reviewed.

API is not undertaking to meet the duties of employers, manufacturers, or suppliers to warn and properly train and equip their employees, and others exposed, concerning health and safety risks and precautions, nor undertaking their obligations under local, state, or federal laws.

Information concerning safety and health risks and proper precautions with respect to particular materials and con- ditions should be obtained from the employer, the manufacturer or supplier of that material, or the material safety data sheet.

Nothing contained in any API publication is to be construed as granting any right, by implication or otherwise, for the manufacture, sale, or use of any method, apparatus, or product covered by letters patent. Neither should any- thing contained in the publication be construed as insuring anyone against liability for infringement of letters patent.

Generally, API standards are reviewed and revised, reaffirmed, or withdrawn at least every five years. Sometimes a one-time extension of up to two years will be added to this review cycle. This publication will no longer be in effect five years after its publication date as an operative API standard or, where an extension has been granted, upon republication. Status of the publication can be ascertained from the standardization manager [telephone (202) 682- 8000]. A catalog of API publications and materials is published annually and updated quarterly by API, 1220 L Street, N.W., Washington, D.C. 20005.

This document was produced under API standardization procedures that ensure appropriate notification and par- ticipation in the developmental process and is designated as an API standard. Questions concerning the interpre- tation of the content of this standard or comments and questions concerning the procedures under which this standard was developed should be directed in writing to the standardization manager, American Petroleum Insti- tute, 1220 L Street, N.W., Washington, D.C. 20005. Requests for permission to reproduce or translate all or any part of the material published herein should also be addressed to the director.

API standards are published to facilitate the broad availability of proven, sound engineering and operating prac- tices. These standards are not intended to obviate the need for applying sound engineering judgment regarding when and where these standards should be utilized. The formulation and publication of API standards is not intended in any way to inhibit anyone from using any other practices.

Any manufacturer marking equipment or materials in conformance with the marking requirements of an API stan- dard is solely responsible for complying with all the applicable requirements of that standard. API does not repre- sent, warrant, or guarantee that such products do in fact conform to the applicable API standard.

API Foreword

This standard is under the jurisdiction of the API CRE Subcommittee on Piping. This API standard is a modified adoption of the English version of ISO 10434: 1998. ISO 10434 was prepared by Technical Committee ISO/TC 153, Valves, SC1, Design, manufacture, marking and testing and ISO/TC67, materials, equipment and offshore structures for petroleum and natural gas industries, SC6, processing equipment and systems.

In this standard, certain modifications have been made. These technical deviations have been incorporated. A complete list of modifications is given in API Standard Annex C.

For the purposes of this standard, the following editorial changes have been made:

Addition of API Special Notes, API Foreword, and Important information Concerning Use of Asbestos or Alternate Materials

This standard shall become effective on the date printed on the cover but may be used voluntarily from the date of publication.

API publications may be used by anyone desiring to do so. Every effort has been made by the Institute to assure the accuracy and reliability of the data contained in them; however, the Institute makes no representation, warranty, or guarantee in connection with this publication and hereby expressly disclaims any liability or responsibility for loss or damage resulting from its use or for the violation of any federal, state, or municipal regulation with which this publication may conflict.

Suggested revisions are invited and should be submitted to the API Standards Department, American Petroleum Institute, 1220 L Street, N.W., Washington, D.C. 20005.

ISO Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Com- mission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.

Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75% of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this part of ISO 10434 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.

International Standard ISO 10434 was prepared by Technical Committee ISO/TC 153, Valves, Subcommittee SC 1, Design, manufacture, marking and testing, and ISO/TC 67, Materials equipment and offshore structures for petro- leum and natural gas industries, Subcommittee SC 6, Processing equipment and systems.

Annexes A, B and C of this International Standard are for information only. Annex C contains modifications to ISO 10434: 1998. These modifications have been embedded into this API 600/ISO 10434 version.

Introduction

The purpose of this International Standard is to establish, in ISO format, the basic requirements and practices for flanged and butt-welding end steel gate valves of bolted bonnet construction which parallel those given in Ameri- can Petroleum Institute Standard API 600, Tenth Edition. In order to maintain compatibility with the flanges defined in ISO 7005-1 and the flanges in the American National Standard ASME B16.5, valves have been designated to be PN-marked for the former and Class-marked for the latter. It is not the purpose of this International Standard to replace ISO 6002 or any other International Standard which is not identified with petroleum refinery or natural gas industry applications. It does, however, supersede API 600, Tenth Edition.

Bolted bonnet steel gate valves for petroleum and natural gas industries

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 indicate a need for full port openings, heavy wall sections and extra large stem diameters.

   
   

   This specification 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 sizes DN:

   
   

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

   
   

   and is applicable for pressure designations PN: 20; 50; 110; 150; 260; 420

   when metric sized bolt holes are provided in end flanges and PN designations are marked on the valve body. It also covers valves of the corresponding nominal pipe sizes NPS:

   1; 11/4; 11/2; 2; 21/2; 3; 4; 6; 8; 10; 12; 14; 16; 18; 20; 24

   
   

   and applies for equivalent nominal Class ratings: 150; 300; 600; 900; 1 500; 2 500

   when inch-sized bolt holes are provided in end flanges and Class designations are marked on the valve body.

   
   

   It also covers additional marking requirements for valves that are PN (or Class) designated but have flanges drilled for inch (or metric) bolt holes.

   
   

2. Normative references

The following standards contain provisions which, through reference in this text, constitute provisions of this Inter- national Standard. At the time of the publication, the editions indicated were valid. All standards are subject to revi- sion, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.

ISO 7-1:1994, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances and designation.

ISO 4200:1991, Plain end steel tubes, welded and seamless — Dimensions. ISO 5208:1993, Industrial valves — Pressure testing of valves.

ISO 5209:1977, General purpose industrial valves — Marking.

ISO 5210:1991, Industrial valves — Multi-turn valve actuator attachments.

ISO 5752:— 1), Metal valves for use in flanged pipe systems — Face-to-face and centre-to-face dimensions. ISO 6708:1995, Pipework components — Definition and selection of DN (nominal size).

ISO 7005-1:1992, Metallic flanges — Part 1: Steel flanges.

ISO 7268:1983, Pipe components — Definition of nominal pressure. ASME B1.1:1989, Unified inch screw threads (UN and UNR thread form). ASME B1.5:1988 (R1994), Acme screw threads.

ASME B1.8:1988 (R1994), Stub Acme screw threads.

ASME B1.12:1987 (R1992), Screw threads — Class 5 interference — Fit thread. ASME B1.20.1:1983 (R1992), Pipe threads, general purpose (inch).

ASME B16.5:1996, Pipe flanges and flanged fittings.

ASME B16.34:1996, Valves — Flanged, threaded and welding end. ASME B18.2.2:1987 (R1993), Square and hex nuts (inch series).

ASTM A193:1996, Specification for alloy steel and stainless steel bolting materials for high-temperature service.

ASTM A194:1996, Specification for carbon and alloy steel nuts for bolts for high-pressure and high-temperature service.

ASTM A307:1994, Specification for carbon steel bolts and studs, 60 000 psi tensile strength. MSS SP-55:1985 (R1990), Quality standard for steel castings, visual surface examination.

1) To be published. (Revision of ISO 5752:1982)