SIST EN ISO 4126-1:2013
(Main)Safety devices for protection against excessive pressure - Part 1: Safety valves (ISO 4126-1:2013)
Safety devices for protection against excessive pressure - Part 1: Safety valves (ISO 4126-1:2013)
This part of ISO 4126 specifies general requirements for safety valves irrespective of the fluid for which they are designed. It is applicable to safety valves having a flow diameter of 4 mm and above which are for use at set pressures of 0,1 bar gauge and above. No limitation is placed on temperature. This is a product standard and is not applicable to applications of safety valves.
Sicherheitseinrichtungen gegen unzulässigen Überdruck - Teil 1: Sicherheitsventile (ISO 4126-1:2013)
Diese Europäische Norm legt allgemeine Anforderungen an Sicherheitsventile fest, unabhängig von dem Medium, für das sie ausgelegt sind.
Die Norm gilt für Sicherheitsventile mit einem engsten Strömungsdurchmesser von mindestens 4 mm und für Ansprech¬drücke von mindestens 0,1 bar. Temperaturgrenzen sind nicht festgelegt. Die vorliegende Norm ist eine Produktnorm und behandelt keine Anwendungsfälle für Sicherheitsventile.
Dispositifs de sécurité pour protection contre les pressions excessives - Partie 1: Soupapes de sûreté (ISO 4126-1:2013)
L'ISO 4126-1:2013 spécifie les exigences générales des soupapes de sûreté, quel que soit le fluide pour lequel elles sont conçues.
Elle est applicable aux soupapes de sûreté présentant un orifice d'écoulement de diamètre supérieur ou égal à 4 mm, qui sont utilisables à des pressions de début d'ouverture de 0,1 bar effectif et au-dessus. Aucune limitation en température n'est fixée.
L'ISO 4126-1:2013 est une norme de produit et elle n'est pas applicable à la mise en ?uvre des soupapes de sûreté.
Naprave za varovanje pred visokim tlakom - 1. del: Varnostni ventili (ISO 4126-1:2013)
Ta del standarda ISO 4126 določa splošne zahteve za varnostne ventile ne glede na tekočino, za katero so oblikovani. Uporablja se za varnostne ventile s premerom pretoka 4 mm in več, ki se uporabljajo pri nastavljenih tlakih 0,1 bara in več. Temperatura ni omejena. To je standard izdelka in ne velja za uporabo varnostnih ventilov.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2013
1DGRPHãþD
SIST EN ISO 4126-1:2004
SIST EN ISO 4126-1:2004/AC:2007
Naprave za varovanje pred visokim tlakom - 1. del: Varnostni ventili (ISO 4126-
1:2013)
Safety devices for protection against excessive pressure - Part 1: Safety valves (ISO
4126-1:2013)
Sicherheitseinrichtungen gegen unzulässigen Überdruck - Teil 1: Sicherheitsventile (ISO
4126-1:2013)
Dispositifs de sécurité pour protection contre les pressions excessives - Partie 1:
Soupapes de sûreté (ISO 4126-1:2013)
Ta slovenski standard je istoveten z: EN ISO 4126-1:2013
ICS:
13.240 Varstvo pred previsokim Protection against excessive
tlakom pressure
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 4126-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2013
ICS 13.240 Supersedes EN ISO 4126-1:2004
English Version
Safety devices for protection against excessive pressure - Part
1: Safety valves (ISO 4126-1:2013)
Dispositifs de sécurité pour protection contre les pressions Sicherheitseinrichtungen gegen unzulässigen Überdruck -
excessives - Partie 1: Soupapes de sûreté (ISO 4126- Teil 1: Sicherheitsventile (ISO 4126-1:2013)
1:2013)
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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4126-1:2013: E
worldwide for CEN national Members.
Contents Page
Foreword .3
Annex ZA (informative) Relationship between this International Standard and the Essential
Requirements of EU Directive 97/23/EC (PED) .4
Foreword
This document (EN ISO 4126-1:2013) has been prepared by Technical Committee ISO/TC 185 "Safety
devices for protection against excessive pressure" in collaboration with 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 January 2014, and conflicting national standards shall be withdrawn at
the latest by January 2014.
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 ISO 4126-1:2004.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.
According to the CEN-CENELEC Internal Regulations, the national standards organizations 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.
Endorsement notice
The text of ISO 4126-1:2013 has been approved by CEN as EN ISO 4126-1:2013 without any modification.
Annex ZA
(informative)
Relationship between this International Standard and the
Essential Requirements of EU Directive 97/23/EC (PED)
By agreement between ISO and CEN, this CEN annex is included in the DIS and the FDIS but will not appear
in the published ISO standard.
This International Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association to provide one means of conforming to Essential Requirements of
the New Approach Directive 97/23/EC (PED).
Once this standard is cited in the Official Journal of the European Communities under that Directive and has
been implemented as a national standard in at least one Member State, compliance with the normative
clauses of this standard given in Table ZA.1 confers, within the limits of the scope of this standard, a
presumption of conformity with the corresponding Essential Requirements of that Directive and associated
EFTA regulations.
Table ZA.1 — Correspondence between this International Standard and Directive 97/23/EC (PED)
Sub-clauses of this International Essential Requirements of Directive 97/23/EC (PED)
Standard
Essential Requirements Annex I of PED
5,6,7,8,9 Safety accessories 2.11.1
5.1.5 Safety of operation 2.3
5.1.6 Drain and venting 2.5
6.3 Proof test 3.2.2
10 Marking and labelling 3.3
WARNING: Other requirements and other EU Directives may be applicable to the products falling within the
scope of this standard.
INTERNATIONAL ISO
STANDARD 4126-1
Third edition
2013-07-15
Safety devices for protection against
excessive pressure —
Part 1:
Safety valves
Dispositifs de sécurité pour protection contre les pressions excessives —
Partie 1: Soupapes de sûreté
Reference number
ISO 4126-1:2013(E)
©
ISO 2013
ISO 4126-1:2013(E)
© ISO 2013
All rights reserved. Unless otherwise specified, 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
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ii © ISO 2013 – All rights reserved
ISO 4126-1:2013(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and units . 4
5 Design . 4
5.1 General . 4
5.2 Valve end connections . 5
5.3 Minimum requirements for springs . 5
5.4 Materials . 6
6 Production testing . 6
6.1 Purpose . 6
6.2 General . 6
6.3 Hydrostatic testing . 6
6.4 Pneumatic testing . 7
6.5 Adjustment of set or cold differential test pressure . 8
6.6 Seat leakage test. 8
7 Type testing. 8
7.1 General . 8
7.2 Tests to determine operating characteristics . 9
7.3 Tests to determine flow characteristics.11
7.4 Determination of the coefficient of discharge .12
7.5 Certification of coefficient of discharge .12
8 Determination of safety valve performance .13
9 Sizing of safety valves .13
10 Marking and sealing .13
10.1 Marking .13
10.2 Sealing of a safety valve .13
Bibliography .14
ISO 4126-1:2013(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standar
...
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