ISO 6002:2021

Industrial valves — Bolted bonnet steel gate valves

This document specifies the requirements for bolted bonnet steel gate vales having the following features: — bolted bonnet; — outside screw and yoke; — inside screw (alternative for PN 10, PN 16, Class 150, PN 25 and PN 40 only); — single or double obturator; — wedge or parallel seating; — with or without non-metallic obturator or seat seals; — flanged or butt-welding ends. It covers valves of the nominal sizes DN: — 10; 15; 20; 25; 32; 40; 50; 65; 80; 100; 125; 150; 200; 250; 300; 350; 400; 450; 500; 600; 700; 800; 900; 1 000; corresponding to nominal pipe sizes NPS: — ⅜; ½; ; 1; 1 ¼; 1 ½; 2; 2 ½; 3; 4; 5; 6; 8; 10; 12; 14; 16; 18; 20; 24; 28; 32; 36; 40; and applies to valves of the following pressure designations: — PN 10; 16; 25; 40; 63; 100; — Class 150; 300; 600. This document applies to bolted bonnet steel gate valves used for all industrial applications. Additional requirements given in the relevant application standards can apply to bolted bonnet steel gate valves used for more specific applications (e.g. for the water industry, the chemical and petrochemical process industry, the oil and gas industry).

Robinetterie industrielle - Robinets-vannes en acier à chapeau boulonné

Industrijski ventili - Jekleni zasuni s prirobničnim zgornjim delom

Ta dokument določa zahteve za jeklene zasune s prirobničnim zgornjim delom, ki imajo naslednje značilnosti:
– prirobnični zgornji del;
– zunanji vijak in prižemo;
– notranji vijak (alternativa za PN 10, PN 16, razred 150, PN 25 in PN 40);
– enojno ali dvojno tesnilo;
– klinasto ali vzporedno prileganje;
– z nekovinskim tesnilom ali tesnilom prileganja oziroma brez njega;
– prirobnične ali čelno varjene zaključke.
Zajema ventile nazivnih velikosti DN:
– 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600, 700, 800, 900, 1000;
kar ustreza nazivnim velikostim cevi NPS:
– ⅜, ˝, , 1, 1 Ľ, 1 ˝, 2, 2 ˝, 3, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 24, 28, 32, 36, 40;
in velja za ventile z naslednjimi oznakami tlaka:
– PN 10, 16, 25, 40, 63, 100;
– razred 150, 300, 600.
Ta dokument se uporablja za jeklene zasune s prirobničnim zgornjim delom, ki se uporabljajo za vse vrste industrijske uporabe.
Dodatne zahteve, podane v ustreznih standardih za uporabo, je mogoče uporabiti za jeklene zasune s prirobničnim zgornjim delom, ki se uporabljajo za bolj specifično uporabo (npr. za vodno industrijo, kemično in petrokemično procesno industrijo, industrijo nafte in plina).

General Information

• Status: Published
• Publication Date: 24-Jan-2021
• ICS: 23.060.30 - Gate valves
• Technical Committee: ISO/TC 153 - Valves
• Drafting Committee: ISO/TC 153 - Valves
• Current Stage: 6060 - International Standard published
• Start Date: 25-Jan-2021
• Due Date: 03-Oct-2021
• Completion Date: 25-Jan-2021
• Ref Project: SIST ISO 6002:2022 - Industrial valves - Bolted bonnet steel gate valves

Relations

• Revises: ISO 6002:1992 - Bolted bonnet steel gate valves
• Effective Date: 23-Apr-2020

Standards Content (Sample)

SLOVENSKI STANDARD
SIST ISO 6002:2022
01-marec-2022
Nadomešča:
SIST ISO 6002:2000
Industrijski ventili - Jekleni zasuni s prirobničnim zgornjim delom
Industrial valves - Bolted bonnet steel gate valves
Robinetterie industrielle - Robinets-vannes en acier à chapeau boulonné
Ta slovenski standard je istoveten z: ISO 6002:2021
ICS:
23.060.30 Zapirni ventili (zasuni) Gate valves
SIST ISO 6002:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST ISO 6002:2022

---------------------- Page: 2 ----------------------
SIST ISO 6002:2022
INTERNATIONAL ISO
STANDARD 6002
Second edition
2021-01
Industrial valves — Bolted bonnet
steel gate valves
Robinetterie industrielle - Robinets-vannes en acier à chapeau
boulonné
Reference number
ISO 6002:2021(E)
©
ISO 2021

---------------------- Page: 3 ----------------------
SIST ISO 6002:2022
ISO 6002:2021(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved

---------------------- Page: 4 ----------------------
SIST ISO 6002:2022
ISO 6002:2021(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Pressure/temperature ratings . 3
5 Design . 3
5.1 Body wall thickness . 3
5.2 Body dimensions . 5
5.2.1 Flanges . 5
5.2.2 Weld ends . 6
5.3 Gate . 7
5.4 Stem . 8
5.5 Auxiliary connections . 8
5.6 Closure test .11
5.7 Operation .11
6 Materials .12
6.1 Materials other than trim materials .12
6.2 Trim .12
7 Testing and inspection .13
8 Marking .13
8.1 Legibility .13
8.2 Body markings .14
8.3 Ring joints marking .14
8.4 Identification plate marking .14
Bibliography .15
© ISO 2021 – All rights reserved iii

---------------------- Page: 5 ----------------------
SIST ISO 6002:2022
ISO 6002:2021(E)

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 Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 153, Valves.
This second edition cancels and replaces the first edition (ISO 6002:1992), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— in the whole text, deletion of PN 20 and PN 50, addition of PN 63 and inclusion of nominal pipe sizes
NPS and Class designations;
— update of the normative references in Clause 2;
— addition of definitions for DN, NPS, PN and Class;
— revision of Figure 1 identifying valves terms and Figure 6 for butt-welding for auxiliary connections;
— addition of requirements for gate in 5.3 and stem in 5.4;
— addition of requirements for closure test in 5.6;
— deletion of former Table 1 on body wall thickness, deletion of former Table 3 on end-to-end
dimensions for butt-weld end valves and deletion of former 5.4 on envelope dimensions;
— revision of Table 1 on body end port inside diameter, and Table 8 on component materials;
— update of Clause 7 on testing and inspection and Clause 8 on marking.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved

---------------------- Page: 6 ----------------------
SIST ISO 6002:2022
INTERNATIONAL STANDARD ISO 6002:2021(E)
Industrial valves — Bolted bonnet steel gate valves
1 Scope
This document specifies the requirements for bolted bonnet steel gate vales having the following
features:
— bolted bonnet;
— outside screw and yoke;
— inside screw (alternative for PN 10, PN 16, Class 150, PN 25 and PN 40 only);
— single or double obturator;
— wedge or parallel seating;
— with or without non-metallic obturator or seat seals;
— flanged or butt-welding ends.
It covers valves of the nominal sizes DN:
— 10; 15; 20; 25; 32; 40; 50; 65; 80; 100; 125; 150; 200; 250; 300; 350; 400; 450; 500; 600; 700; 800;
900; 1 000;
corresponding to nominal pipe sizes NPS:
— ⅜; ½; ¾; 1; 1 ¼; 1 ½; 2; 2 ½; 3; 4; 5; 6; 8; 10; 12; 14; 16; 18; 20; 24; 28; 32; 36; 40;
and applies to valves of the following pressure designations:
— PN 10; 16; 25; 40; 63; 100;
— Class 150; 300; 600.
This document applies to bolted bonnet steel gate valves used for all industrial applications.
Additional requirements given in the relevant application standards can apply to bolted bonnet
steel gate valves used for more specific applications (e.g. for the water industry, the chemical and
petrochemical process industry, the oil and gas industry).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
ISO 4991, Steel castings for pressure purposes
ISO 5208, Industrial valves — Pressure testing of metallic valves
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 9327 (all parts), Steel forgings and rolled or forged bars for pressure purposes — Technical delivery
conditions
© ISO 2021 – All rights reserved 1

---------------------- Page: 7 ----------------------
SIST ISO 6002:2022
ISO 6002:2021(E)

ISO 9328-1, Steel flat products for pressure purposes — Technical delivery conditions — Part 1: General
requirements
ISO 9328-2, Steel flat products for pressure purposes — Technical delivery conditions — Part 2: Non-alloy
and alloy steels with specified elevated temperature properties
ISO 9328-3, Steel flat products for pressure purposes — Technical delivery conditions — Part 3: Weldable
fine grain steels, normalized
ISO 9328-4, Steel flat products for pressure purposes — Technical delivery conditions — Part 4: Nickel-
alloy steels with specified low temperature properties
ISO 9328-5, Steel flat products for pressure purposes — Technical delivery conditions — Part 5: Weldable
fine grain steels, thermomechanically rolled
ISO 14737, Carbon and low alloy cast steels for general applications
EN 1092-1, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated — Part 1: Steel flanges
EN 12982, Industrial valves — End-to-end and centre-to-end dimensions for butt welding end valves
EN 12516-1, Industrial valves — Shell design strength — Part 1: Tabulation method for steel valve shells
EN 12516-2, Industrial valves — Shell design strength — Part 2: Calculation method for steel valve shells
ASME B16.10, Face-to-Face and End-to-End Dimensions of Valves
ASME B16.34, Valves Flanged, Threaded, and Welding End
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
nominal size
DN
NPS
alphanumeric designation of size for components of a pipework system, which is used for reference
purposes, comprising the letters DN or NPS followed by a dimensionless number indirectly related to
the physical size, in millimetres, of the bore or outside diameter of the end connections
Note 1 to entry: The number following the letters DN or NPS does not represent a measurable value and is not
used for calculation purposes except where specified in the relevant standard.
Note 2 to entry: See ISO 6708 and ASME B16.34.
2 © ISO 2021 – All rights reserved

---------------------- Page: 8 ----------------------
SIST ISO 6002:2022
ISO 6002:2021(E)

3.2
PN
Class
alphanumeric designation for pressure-temperature rating that is common for components used
in a piping system, used for reference purposes, comprising the letters "PN" or "Class" followed
by a dimensionless number indirectly related to the pressure retaining capability as a function of
temperature of the component
Note 1 to entry: The number following the letters PN or Class does not represent a measurable value and is not
used for calculation purposes except where specified in the relevant standard. There is no definitive correlation
that links PN designations to Class designations.
Note 2 to entry: See ISO 7268 and ASME B16.34.
4 Pressure/temperature ratings
4.1 The pressure/temperature ratings shall be in accordance with EN 12516-1 for PN-designated
valves and in accordance with ASME B16.34 for Class-designated valves.
4.2 The temperature shown for a corresponding pressure rating is the temperature of the pressure-
containing shell of the valve. In general, this temperature is the same as that of the contained fluid. The
use of a pressure rating corresponding to a temperature other than that of the contained fluid is the
responsibility of the user.
4.3 For temperatures below the lowest temperature listed in the pressure/temperature rating tables,
the working pressure shall not be greater than the pressure stated for the lowest listed temperature. The
use of valves at lower temperatures is the responsibility of the user. Consideration should be given to the
loss of ductility and impact strength of many materials at low temperature.
5 Design
5.1 Body wall thickness
5.1.1 The terms used in 5.1 are illustrated in Figure 1. d is the minimum inside diameter given in
Table 1.
5.1.2 The minimum body wall thickness, T , at the time of manufacture, shall be in accordance with:
m
— EN 12516-1 or EN 12516-2 for PN-designated valves,
— ASME B16.34 or EN 12516-1 for Class-designated valves.
Exceptions are given in 5.1.3 to 5.1.5.
Additional metal thickness needed for assembly stresses, closing stresses, stress concentrations and
shapes other than circular shall be determined by the manufacturers, since these factors vary widely.
5.1.3 The weld preparation in butt-welding end valves (see 5.2.2.2) shall not reduce the body wall
thickness to less than the values specified in 5.1.2 within a region closer to the outside surface of the
body neck than T measured along the run direction.
m
The transition to the weld preparation shall be gradual and the section shall be essentially circular
through the entire length of the transition. Sharp discontinuities or abrupt changes in section in areas
that infringe into the transition shall be avoided, except that test collars or bands, either welded or
integral, are allowed.
© ISO 2021 – All rights reserved 3

---------------------- Page: 9 ----------------------
SIST ISO 6002:2022
ISO 6002:2021(E)

In no case shall the thickness be less than 0,77 T at a distance of 2 T from the weld end.
m m
5.1.4 The valve body neck shall maintain the minimum body wall thickness T as specified in 5.1.2
m
within the distance 1,1 dT measured from the outside of the body run along the neck direction, where
m
d is the inside diameter as defined in 5.2.1.3.
Beyond the distance 1,1 dT from the outside of the body run, straight circular sections of body necks
m
with inside diameter d' shall be provided with a m
...

INTERNATIONAL ISO
STANDARD 6002
Second edition
2021-01
Industrial valves — Bolted bonnet
steel gate valves
Robinetterie industrielle - Robinets-vannes en acier à chapeau
boulonné
Reference number
ISO 6002:2021(E)
©
ISO 2021

---------------------- Page: 1 ----------------------
ISO 6002:2021(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 6002:2021(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Pressure/temperature ratings . 3
5 Design . 3
5.1 Body wall thickness . 3
5.2 Body dimensions . 5
5.2.1 Flanges . 5
5.2.2 Weld ends . 6
5.3 Gate . 7
5.4 Stem . 8
5.5 Auxiliary connections . 8
5.6 Closure test .11
5.7 Operation .11
6 Materials .12
6.1 Materials other than trim materials .12
6.2 Trim .12
7 Testing and inspection .13
8 Marking .13
8.1 Legibility .13
8.2 Body markings .14
8.3 Ring joints marking .14
8.4 Identification plate marking .14
Bibliography .15
© ISO 2021 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO 6002:2021(E)

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 Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 153, Valves.
This second edition cancels and replaces the first edition (ISO 6002:1992), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— in the whole text, deletion of PN 20 and PN 50, addition of PN 63 and inclusion of nominal pipe sizes
NPS and Class designations;
— update of the normative references in Clause 2;
— addition of definitions for DN, NPS, PN and Class;
— revision of Figure 1 identifying valves terms and Figure 6 for butt-welding for auxiliary connections;
— addition of requirements for gate in 5.3 and stem in 5.4;
— addition of requirements for closure test in 5.6;
— deletion of former Table 1 on body wall thickness, deletion of former Table 3 on end-to-end
dimensions for butt-weld end valves and deletion of former 5.4 on envelope dimensions;
— revision of Table 1 on body end port inside diameter, and Table 8 on component materials;
— update of Clause 7 on testing and inspection and Clause 8 on marking.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved

---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 6002:2021(E)
Industrial valves — Bolted bonnet steel gate valves
1 Scope
This document specifies the requirements for bolted bonnet steel gate vales having the following
features:
— bolted bonnet;
— outside screw and yoke;
— inside screw (alternative for PN 10, PN 16, Class 150, PN 25 and PN 40 only);
— single or double obturator;
— wedge or parallel seating;
— with or without non-metallic obturator or seat seals;
— flanged or butt-welding ends.
It covers valves of the nominal sizes DN:
— 10; 15; 20; 25; 32; 40; 50; 65; 80; 100; 125; 150; 200; 250; 300; 350; 400; 450; 500; 600; 700; 800;
900; 1 000;
corresponding to nominal pipe sizes NPS:
— ⅜; ½; ¾; 1; 1 ¼; 1 ½; 2; 2 ½; 3; 4; 5; 6; 8; 10; 12; 14; 16; 18; 20; 24; 28; 32; 36; 40;
and applies to valves of the following pressure designations:
— PN 10; 16; 25; 40; 63; 100;
— Class 150; 300; 600.
This document applies to bolted bonnet steel gate valves used for all industrial applications.
Additional requirements given in the relevant application standards can apply to bolted bonnet
steel gate valves used for more specific applications (e.g. for the water industry, the chemical and
petrochemical process industry, the oil and gas industry).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
ISO 4991, Steel castings for pressure purposes
ISO 5208, Industrial valves — Pressure testing of metallic valves
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 9327 (all parts), Steel forgings and rolled or forged bars for pressure purposes — Technical delivery
conditions
© ISO 2021 – All rights reserved 1

---------------------- Page: 5 ----------------------
ISO 6002:2021(E)

ISO 9328-1, Steel flat products for pressure purposes — Technical delivery conditions — Part 1: General
requirements
ISO 9328-2, Steel flat products for pressure purposes — Technical delivery conditions — Part 2: Non-alloy
and alloy steels with specified elevated temperature properties
ISO 9328-3, Steel flat products for pressure purposes — Technical delivery conditions — Part 3: Weldable
fine grain steels, normalized
ISO 9328-4, Steel flat products for pressure purposes — Technical delivery conditions — Part 4: Nickel-
alloy steels with specified low temperature properties
ISO 9328-5, Steel flat products for pressure purposes — Technical delivery conditions — Part 5: Weldable
fine grain steels, thermomechanically rolled
ISO 14737, Carbon and low alloy cast steels for general applications
EN 1092-1, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated — Part 1: Steel flanges
EN 12982, Industrial valves — End-to-end and centre-to-end dimensions for butt welding end valves
EN 12516-1, Industrial valves — Shell design strength — Part 1: Tabulation method for steel valve shells
EN 12516-2, Industrial valves — Shell design strength — Part 2: Calculation method for steel valve shells
ASME B16.10, Face-to-Face and End-to-End Dimensions of Valves
ASME B16.34, Valves Flanged, Threaded, and Welding End
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
nominal size
DN
NPS
alphanumeric designation of size for components of a pipework system, which is used for reference
purposes, comprising the letters DN or NPS followed by a dimensionless number indirectly related to
the physical size, in millimetres, of the bore or outside diameter of the end connections
Note 1 to entry: The number following the letters DN or NPS does not represent a measurable value and is not
used for calculation purposes except where specified in the relevant standard.
Note 2 to entry: See ISO 6708 and ASME B16.34.
2 © ISO 2021 – All rights reserved

---------------------- Page: 6 ----------------------
ISO 6002:2021(E)

3.2
PN
Class
alphanumeric designation for pressure-temperature rating that is common for components used
in a piping system, used for reference purposes, comprising the letters "PN" or "Class" followed
by a dimensionless number indirectly related to the pressure retaining capability as a function of
temperature of the component
Note 1 to entry: The number following the letters PN or Class does not represent a measurable value and is not
used for calculation purposes except where specified in the relevant standard. There is no definitive correlation
that links PN designations to Class designations.
Note 2 to entry: See ISO 7268 and ASME B16.34.
4 Pressure/temperature ratings
4.1 The pressure/temperature ratings shall be in accordance with EN 12516-1 for PN-designated
valves and in accordance with ASME B16.34 for Class-designated valves.
4.2 The temperature shown for a corresponding pressure rating is the temperature of the pressure-
containing shell of the valve. In general, this temperature is the same as that of the contained fluid. The
use of a pressure rating corresponding to a temperature other than that of the contained fluid is the
responsibility of the user.
4.3 For temperatures below the lowest temperature listed in the pressure/temperature rating tables,
the working pressure shall not be greater than the pressure stated for the lowest listed temperature. The
use of valves at lower temperatures is the responsibility of the user. Consideration should be given to the
loss of ductility and impact strength of many materials at low temperature.
5 Design
5.1 Body wall thickness
5.1.1 The terms used in 5.1 are illustrated in Figure 1. d is the minimum inside diameter given in
Table 1.
5.1.2 The minimum body wall thickness, T , at the time of manufacture, shall be in accordance with:
m
— EN 12516-1 or EN 12516-2 for PN-designated valves,
— ASME B16.34 or EN 12516-1 for Class-designated valves.
Exceptions are given in 5.1.3 to 5.1.5.
Additional metal thickness needed for assembly stresses, closing stresses, stress concentrations and
shapes other than circular shall be determined by the manufacturers, since these factors vary widely.
5.1.3 The weld preparation in butt-welding end valves (see 5.2.2.2) shall not reduce the body wall
thickness to less than the values specified in 5.1.2 within a region closer to the outside surface of the
body neck than T measured along the run direction.
m
The transition to the weld preparation shall be gradual and the section shall be essentially circular
through the entire length of the transition. Sharp discontinuities or abrupt changes in section in areas
that infringe into the transition shall be avoided, except that test collars or bands, either welded or
integral, are allowed.
© ISO 2021 – All rights reserved 3

---------------------- Page: 7 ----------------------
ISO 6002:2021(E)

In no case shall the thickness be less than 0,77 T at a distance of 2 T from the weld end.
m m
5.1.4 The valve body neck shall maintain the minimum body wall thickness T as specified in 5.1.2
m
within the distance 1,1 dT measured from the outside of the body run along the neck direction, where
m
d is the inside diameter as defined in 5.2.1.3.
Beyond the distance 1,1 dT from the outside of the body run, straight circular sections of body necks
m
with inside diameter d' shall be provided with a minimum local wall thickness of T' where T' is
determined, by interpolation if necessary, as the value of T which would correspond to a value of d
m
equal to 2d'/3, using the applicable nominal pressure rating.
For any case where d' > 1,5 d, the newly determined minimum wall thickness for the body neck will be
greater than the basic value T . In such cases, this gre
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 6002
ISO/TC 153
Industrial valves — Bolted bonnet
Secretariat: AFNOR
steel gate valves
Voting begins on:
2020­10­06
Robinetterie industrielle - Robinets-vannes en acier à chapeau
boulonné
Voting terminates on:
2020­12­01
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 6002:2020(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
©
NATIONAL REGULATIONS. ISO 2020

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ISO/FDIS 6002:2020(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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ii © ISO 2020 – All rights reserved

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ISO/FDIS 6002:2020(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Pressure/temperature ratings . 3
5 Design . 3
5.1 Body wall thickness . 3
5.2 Body dimensions . 5
5.2.1 Flanges . 5
5.2.2 Weld ends . 6
5.3 Gate . 7
5.4 Stem . 8
5.5 Auxiliary connections . 8
5.6 Closure test .11
5.7 Operation .11
6 Materials .12
6.1 Materials other than trim materials .12
6.2 Trim .12
7 Testing and inspection .13
8 Marking .13
8.1 Legibility .13
8.2 Body markings .14
8.3 Ring joints marking .14
8.4 Identification plate marking .14
Bibliography .15
© ISO 2020 – All rights reserved iii

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ISO/FDIS 6002:2020(E)

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 Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 153, Valves.
This second edition cancels and replaces the first edition (ISO 6002:1992), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— in the whole text, deletion of PN 20 and PN 50, addition of PN 63 and inclusion of nominal pipe sizes
NPS and Class designations;
— update of the normative references in Clause 2;
— addition of definitions for DN, NPS, PN and Class;
— revision of Figure 1 identifying valves terms and Figure 6 for butt-welding for auxiliary connections;
— addition of requirements for gate in 5.3 and stem in 5.4;
— addition of requirements for closure test in 5.6;
— deletion of former Table 1 on body wall thickness, deletion of former Table 3 on end­to­end
dimensions for butt­weld end valves and deletion of former 5.4 on envelope dimensions;
— revision of Table 1 on body end port inside diameter, and Table 8 on component materials;
— update of Clause 7 on testing and inspection and Clause 8 on marking.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
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FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 6002:2020(E)
Industrial valves — Bolted bonnet steel gate valves
1 Scope
This document specifies the requirements for bolted bonnet steel gate vales having the following
features:
— bolted bonnet;
— outside screw and yoke;
— inside screw (alternative for PN 10, PN 16, Class 150, PN 25 and PN 40 only);
— single or double obturator;
— wedge or parallel seating;
— with or without non­metallic obturator or seat seals;
— flanged or butt-welding ends.
It covers valves of the nominal sizes DN:
— 10; 15; 20; 25; 32; 40; 50; 65; 80; 100; 125; 150; 200; 250; 300; 350; 400; 450; 500; 600; 700; 800;
900; 1 000;
corresponding to nominal pipe sizes NPS:
— ⅜; ½; ¾; 1; 1 ¼; 1 ½; 2; 2 ½; 3; 4; 5; 6; 8; 10; 12; 14; 16; 18; 20; 24; 28; 32; 36; 40;
and applies to valves of the following pressure designations:
— PN 10; 16; 25; 40; 63; 100;
— Class 150; 300; 600.
This document applies to bolted bonnet steel gate valves used for all industrial applications.
Additional requirements given in the relevant application standards can apply to bolted bonnet
steel gate valves used for more specific applications (e.g. for the water industry, the chemical and
petrochemical process industry, the oil and gas industry).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
ISO 4991, Steel castings for pressure purposes
ISO 5208, Industrial valves — Pressure testing of metallic valves
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 9327 (all parts), Steel forgings and rolled or forged bars for pressure purposes — Technical delivery
conditions
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ISO/FDIS 6002:2020(E)

ISO 9328­1, Steel flat products for pressure purposes — Technical delivery conditions — Part 1: General
requirements
ISO 9328­2, Steel flat products for pressure purposes — Technical delivery conditions — Part 2: Non-alloy
and alloy steels with specified elevated temperature properties
ISO 9328­3, Steel flat products for pressure purposes — Technical delivery conditions — Part 3: Weldable
fine grain steels, normalized
ISO 9328­4, Steel flat products for pressure purposes — Technical delivery conditions — Part 4: Nickel-
alloy steels with specified low temperature properties
ISO 9328­5, Steel flat products for pressure purposes — Technical delivery conditions — Part 5: Weldable
fine grain steels, thermomechanically rolled
ISO 14737, Carbon and low alloy cast steels for general applications
EN 1092­1, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated — Part 1: Steel flanges
EN 12982, Industrial valves — End-to-end and centre-to-end dimensions for butt welding end valves
EN 12516­1, Industrial valves — Shell design strength — Part 1: Tabulation method for steel valve shells
EN 12516­2, Industrial valves — Shell design strength — Part 2: Calculation method for steel valve shells
ASME B16.10, Face-to-Face and End-to-End Dimensions of Valves
ASME B16.34, Valves Flanged, Threaded, and Welding End
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
nominal size
DN
NPS
alphanumeric designation of size for components of a pipework system, which is used for reference
purposes, comprising the letters DN or NPS followed by a dimensionless number indirectly related to
the physical size, in millimetres, of the bore or outside diameter of the end connections
Note 1 to entry: The number following the letters DN or NPS does not represent a measurable value and is not
used for calculation purposes except where specified in the relevant standard.
Note 2 to entry: See ISO 6708 and ASME B16.34.
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ISO/FDIS 6002:2020(E)

3.2
PN
Class
alphanumeric designation for pressure­temperature rating that is common for components used
in a piping system, used for reference purposes, comprising the letters "PN" or "Class" followed
by a dimensionless number indirectly related to the pressure retaining capability as a function of
temperature of the component
Note 1 to entry: The number following the letters PN or Class does not represent a measurable value and is not
used for calculation purposes except where specified in the relevant standard. There is no definitive correlation
that links PN designations to Class designations.
Note 2 to entry: See ISO 7268 and ASME B16.34.
4 Pressure/temperature ratings
4.1 The pressure/temperature ratings shall be in accordance with EN 12516­1 for PN­designated
valves and in accordance with ASME B16.34 for Class­designated valves.
4.2 The temperature shown for a corresponding pressure rating is the temperature of the pressure­
containing shell of the valve. In general, this temperature is the same as that of the contained fluid. The
use of a pressure rating corresponding to a temperature other than that of the contained fluid is the
responsibility of the user.
4.3 For temperatures below the lowest temperature listed in the pressure/temperature rating tables,
the working pressure shall not be greater than the pressure stated for the lowest listed temperature. The
use of valves at lower temperatures is the responsibility of the user. Consideration should be given to the
loss of ductility and impact strength of many materials at low temperature.
5 Design
5.1 Body wall thickness
5.1.1 The terms used in 5.1 are illustrated in Figure 1. d is the minimum inside diameter given in
Table 1.
5.1.2 The minimum body wall thickness, T , at the time of manufacture, shall be in accordance with:
m
— EN 12516­1 or EN 12516­2 for PN­designated valves,
— ASME B16.34 or EN 12516­1 for Class­designated valves.
Exceptions are given in 5.1.3 to 5.1.5.
Additional metal thickness needed for assembly stresses, closing stresses, stress concentrations and
shapes other than circular shall be determined by the manufacturers, since these factors vary widely.
5.1.3 The weld preparation in butt­welding end valves (see 5.2.2.2) shall not reduce the body wall
thickness to less than the values specified in 5.1.2 within a region closer to the outside surface of the
body neck than T measured along the run direction.
m
The transition to the weld preparation shall be gradual and the section shall be essentially circular
through the entire length of the transition. Sharp discontinuities or abrupt changes in section in areas
that infringe into the transition shall be avoided, except that test collars or bands, either welded or
integral, are allowed.
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ISO/FDIS 6002:2020(E)

In no case shall the thickness be less than 0,77 T at a distance of 2 T from the weld end.
m m
5.1.4 The valve body neck shall maintain the minimum body wall thickness T as specified in 5.1.2
m
within the distance 1,1 dT measured from the outside of the body run along the neck direction, where
m
d is the inside diameter as defined in 5.2.1.3.
Beyond the distance 1,1 dT from the outside of the body run, straight circular sections of body necks
m
with inside diameter d' shall be provided with a minimum local wall thickness of T' where T' is
determined, by interpolation if necessary, as the
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