National foreword

This British Standard is the UK implementation of EN 13774:2013. It supersedes BS EN 13774:2003 which is withdrawn.

The UK participation in its preparation was entrusted to Technical Committee PSE/18/1, Industrial valves, steam traps, actuators and safety devices against excessive pressure - Valves - Basic standards.

A list of organizations represented on this committee can be obtained on request to its secretary.

This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2013.

This European Standard was approved by CEN on 28 December 2012.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

Foreword

This document (EN 13774:2013) has been prepared by Technical Committee CEN/TC 69 “Industrial valves”, the secretariat of which is held by AFNOR.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2013, and conflicting national standards shall be withdrawn at the latest by August 2013.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 13774:2003.

This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association.

The following is a list of the main changes compared to the previous edition:

the Scope has been modified;
the Normative References (Clause 2) have been updated;
requirements of type tests and production tests (Clause 5) have been completely revised, in particular:
1. requirements for “strength design” (5.3.2), for “extended drain, vent and sealant lines” (5.3.8), for “end-to-end dimensions” (5.4.3), for “mechanical resistance against excessive actuating forces” (5.7) have been added;
2. requirements for “resistance to wear” (5.12) and for “reference flow rate” (5.13) became optional;
3. requirements for “bending resistance” and for “resistance to liquid agents” have been deleted;
the annex on analysis of the technical file and recording of the initial conditions has been deleted;
the annex on test methods for valves (Annex A) has been updated;
the annex on additional characteristics on request from the purchaser has been deleted;
the annex on resistance to bending moment applied via the stem or the shaft has been deleted;
the annex providing the European Standards for valves (Annex B) has been updated;
the annex giving a summary of tests on product and type tests (Annex C) has been added;
the Bibliography has been updated.

According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

1 Scope

This European Standard deals with metal isolating valves used for gas distribution systems with maximum operating pressure up to 16 bar, and which operate with fuel gases of the first, the second and the third family, in accordance with EN 437.

The types of isolating valves to be considered are: plug and ball valves, gate valves, globe valves and butterfly valves.

This standard does not apply to:

valves for domestic installations;
safety type pressure relief valves;
wellhead valves.

In the case of power operated valves, the requirements for the power source are not covered by this European Standard.

The valves covered in this European Standard operate in the following classes of temperature:

- 10 °C to 60 °C;
- 20 °C to 60 °C;
the range is stated by the purchaser for special design.

This European Standard gives additional requirements to the relevant products standards. (See Annex B.)

In case of contradictions between the standards mentioned in Annex B and this European Standard, EN 13774 prevails.

2 Normative references

3 Terms and definitions

4 Symbols and abbreviations

5 Requirements, type tests and production tests

5.1 Type testing

5.2 Materials

5.3 Design

5.4 Dimensions

5.5 Operability and endurance

5.6 Strength of stops

5.7 Mechanical resistance against excessive actuating forces

5.8 Resistance of the obturator to static differential pressure

5.9 Shell strength

5.10 External leak tightness

5.11 Internal leak tightness

5.12 Resistance to wear (optional test)

5.13 Reference flow rate (optional test)

5.14 Cleanliness

5.15 Storage

6 Marking

Bibliography

BS EN 13774:2013

Valves for gas distribution systems with maximum operating pressure less than or equal to 16 bar. Performance requirements

Current, Under Review

Published:

31 Mar 2013