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API 600 Bolted Bonnet Steel Gate Valves

API 600 Bolted Bonnet Steel Gate Valves for Petroleum and Natural Gas Industries


Bolted Bonnet Steel Gate Valves

for Petroleum and Natural Gas Industries

API Standard 600, Eleventh Edition

October 2001

ISO 10434: 1998

ANSI/API Std 600-2001



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 American 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



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 ball valve 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 International Standard. At the time of the publication, the editions indicated were valid. All standards are subject to revision, 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,Pipeline 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)