ISO 5209:2019

INTERNATIONAL ISO
STANDARD 5209
Second edition
2019-08
General purpose industrial valves —
Marking
Appareils de robinetterie industrielle d'usage général — Marquage
Reference number
©
ISO 2019
© ISO 2019
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: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 2
4.1 General . 2
4.2 Mandatory markings . . 2
4.3 Supplementary markings . 2
4.4 Other markings . 2
4.5 Omission of markings . 3
5 Details of markings . 4
5.1 Nominal size . 4
5.2 PN/Class designation . 4
5.3 Material . 4
5.4 Manufacturer's name or trademark . 4
5.5 Arrow for direction of flow . 5
5.6 Ring joint number . 5
5.7 Maximum allowable temperature, TS . 5
5.8 Threaded end identification . 5
5.9 Maximum allowable pressure, PS . 5
5.10 Product identification . 5
5.11 Reference to standards . 5
5.12 Melt identification . 5
5.13 Trim . 5
5.14 Service symbols . 5
5.15 Internal coating, liner, lining or internal painting . 5
5.16 Quality and test markings . 6
5.17 Inspector's identification . 6
5.18 Year of manufacture . 6
5.19 Flow coefficient . 6
5.20 Allowable differential pressure, Δp . 6
5.21 Closing direction . 6
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.
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.
This second edition cancels and replaces the first edition (ISO 5209:1977), which has been technically
revised. The main changes compared to the previous edition are as follows:
— the structure has been aligned with the current Directives, Part 2;
— Clause 4 has been updated to give the requirements for mandatory, supplementary and other
markings;
— in Table 1, item 20 "Allowable differential pressure", item 21 "Closing direction" and columns 3 to 5
have been added;
— a new Clause 5 has been created to give details of marking.
iv © ISO 2019 – All rights reserved

Introduction
The purpose of this document is to establish some basic requirements for the marking of valves and to
provide recommendations for additional markings.
This document is to be considered in conjunction with the requirements of International Standards
applicable to specific types of valves or specific requirements agreed between the manufacturer and
the customer.
INTERNATIONAL STANDARD ISO 5209:2019(E)
General purpose industrial valves — Marking
1 Scope
This document specifies the requirements for the mandatory and optional markings of general purpose
industrial valves. It defines the method of applying the markings, on the body, on a flange, on an
identification plate or any other location.
This document is considered in conjunction with the specified requirements of the valve product
standards or valve performance standards.
The marking requirements for plastic valves are not within the scope of this document.
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 7-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances
and designation
ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions,
tolerances and designation
ANSI/ASME B1.20.1, Pipe Threads, General Purpose, Inch
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
integral marking
integrally cast, forged or stamped marking on the body or bonnet/cover of the valve
3.2
marking plate
plate fixed to the body or bonnet/cover with one or more mandatory markings
Note 1 to entry: See also 4.1.3.
3.3
identification plate
plate fixed to the valve with supplementary or other markings
Note 1 to entry: See also 4.1.3.
4 Requirements
4.1 General
4.1.1 Where the requirements in a valve product or performance standard differ from those given in
this document, then the requirements of the product or performance standard apply.
4.1.2 Table 1 lists the items that shall be considered for inclusion in product or performance standards.
Details of the markings are given in Clause 5.
4.1.3 Markings shall be located as detailed in 4.2, 4.3 and 4.4.
Painted-on markings are not permitted.
Markings on the body or bonnet/cover shall be integral with the body (e.g. cast, forged or stamped or
laser-marked) or shall be on a marking plate securely fixed to the body (plate which is distinct from
the identification plate). The material of this plate and the method of fixing to the body shall be at the
discretion of the manufacturer, unless otherwise specified in product or performance standards.
All marking plates and identification plates and their means of fixing shall be in a material which is
resistant to atmospheric corrosion. Marking plates shall also be suitable for the allowable temperature
of the valve.
4.2 Mandatory markings
4.2.1 Items 1 to 4 in Table 1 shall be marked on every valve and shall be integral markings or on a
marking plate. If a valve has no defined PN or Class designation, items 7 and 9 in Table 1 are mandatory.
See also 4.5.4.
4.2.2 Items 5 and 6 in Table 1 shall be marked on those valves requiring these markings (see 5.5 and 5.6).
4.3 Supplementary markings
Items 7 to 21 in Table 1 are optional unless otherwise specified in product or performance standard.
The location of supplementary markings shall be determined by the manufacturer unless otherwise
specified in the relevant product or performance standard.
4.4 Other markings
A manufacturer complying with the requirements of this document and those of product or performance
standards relevant to
...

SLOVENSKI STANDARD
01-april-2023
Industrijski ventili za splošno uporabo - Označevanje
General purpose industrial valves - Marking
Appareils de robinetterie industrielle d'usage général - Marquage
Ta slovenski standard je istoveten z: ISO 5209:2019
ICS:
23.060.01 Ventili na splošno Valves in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 5209
Second edition
2019-08
General purpose industrial valves —
Marking
Appareils de robinetterie industrielle d'usage général — Marquage
Reference number
©
ISO 2019
© ISO 2019
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: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 2
4.1 General . 2
4.2 Mandatory markings . . 2
4.3 Supplementary markings . 2
4.4 Other markings . 2
4.5 Omission of markings . 3
5 Details of markings . 4
5.1 Nominal size . 4
5.2 PN/Class designation . 4
5.3 Material . 4
5.4 Manufacturer's name or trademark . 4
5.5 Arrow for direction of flow . 5
5.6 Ring joint number . 5
5.7 Maximum allowable temperature, TS . 5
5.8 Threaded end identification . 5
5.9 Maximum allowable pressure, PS . 5
5.10 Product identification . 5
5.11 Reference to standards . 5
5.12 Melt identification . 5
5.13 Trim . 5
5.14 Service symbols . 5
5.15 Internal coating, liner, lining or internal painting . 5
5.16 Quality and test markings . 6
5.17 Inspector's identification . 6
5.18 Year of manufacture . 6
5.19 Flow coefficient . 6
5.20 Allowable differential pressure, Δp . 6
5.21 Closing direction . 6
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.
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.
This second edition cancels and replaces the first edition (ISO 5209:1977), which has been technically
revised. The main changes compared to the previous edition are as follows:
— the structure has been aligned with the current Directives, Part 2;
— Clause 4 has been updated to give the requirements for mandatory, supplementary and other
markings;
— in Table 1, item 20 "Allowable differential pressure", item 21 "Closing direction" and columns 3 to 5
have been added;
— a new Clause 5 has been created to give details of marking.
iv © ISO 2019 – All rights reserved

Introduction
The purpose of this document is to establish some basic requirements for the marking of valves and to
provide recommendations for additional markings.
This document is to be considered in conjunction with the requirements of International Standards
applicable to specific types of valves or specific requirements agreed between the manufacturer and
the customer.
INTERNATIONAL STANDARD ISO 5209:2019(E)
General purpose industrial valves — Marking
1 Scope
This document specifies the requirements for the mandatory and optional markings of general purpose
industrial valves. It defines the method of applying the markings, on the body, on a flange, on an
identification plate or any other location.
This document is considered in conjunction with the specified requirements of the valve product
standards or valve performance standards.
The marking requirements for plastic valves are not within the scope of this document.
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 7-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances
and designation
ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions,
tolerances and designation
ANSI/ASME B1.20.1, Pipe Threads, General Purpose, Inch
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
integral marking
integrally cast, forged or stamped marking on the body or bonnet/cover of the valve
3.2
marking plate
plate fixed to the body or bonnet/cover with one or more mandatory markings
Note 1 to entry: See also 4.1.3.
3.3
identification plate
plate fixed to the valve with supplementary or other markings
Note 1 to entry: See also 4.1.3.
4 Requirements
4.1 General
4.1.1 Where the requirements in a valve product or performance standard differ from those given in
this document, then the requirements of the product or performance standard apply.
4.1.2 Table 1 lists the items that shall be considered for inclusion in product or performance standards.
Details of the markings are given in Clause 5.
4.1.3 Markings shall be located as detailed in 4.2, 4.3 and 4.4.
Painted-on markings are not permitted.
Markings on the body or bonnet/cover shall be integral with the body (e.g. cast, forged or stamped or
laser-marked) or shall be on a marking plate securely fixed to the body (plate which is distinct from
the identification plate). The material of this plate and the method of fixing to the body shall be at the
discretion of the manufacturer, unless otherwise specified in product or performance standards.
All marking plates and identification plates and their means of fixing shall be in a material which is
resistant to atmospheric corrosion. Marking plates shall also be suitable for the allowable temper
...