EN ISO 4126-2:2003

Safety devices for protection against excessive pressure - Part 2: Bursting disc safety devices (ISO 4126-2:2003)

ISO 4126-2:2003 specifies the requirements for bursting disc safety devices.
ISO 4126-2:2003 includes the requirements for the design, manufacture, inspection, testing, certification, marking, and packaging.
The requirements for the application, selection and installation of bursting disc safety devices are given in ISO 4126-6.

Sicherheitseinrichtungen gegen unzulässigen Überdruck - Teil 2: Berstscheibeneinrichtungen (ISO 4126-2:2003)

Dieser Teil der Norm legt Anforderungen an Berstscheibeneinrichtungen fest. Er legt ferner die Anforderungen fest für Konstruktion, Herstellung, Überwachung, Prüfung, Bescheinigung, Kennzeichnung und Verpackung. Die Anforderungen für Auswahl, Anwendung und Anordnung von Berstscheibeneinrichtungen sind im Teil 6 dieser Norm enthalten.

Dispositifs de sécurité pour la protection contre les pressions excessives - Partie 2: Dispositifs de sûreté à disque de rupture (ISO 4126-2:2003)

L'ISO 4126-2:2003 spécifie les prescriptions applicables aux dispositifs de sûreté à disque de rupture.
L'ISO 4126-2:2003 comprend les prescriptions de conception, de fabrication, de contrôle, d'essai, de marquage, de certification et de conditionnement.
Les prescriptions concernant l'application, la sélection et l'installation des dispositifs de sûreté à disque de rupture sont indiquées dans l'ISO 4126-6.

Naprave za varovanje pred visokim tlakom - 2. del: Naprave z razpočnimi membranami (ISO 4126-2:2003)

General Information

• Status: Withdrawn
• Publication Date: 14-Jan-2003
• Withdrawal Date: 12-Mar-2019
• ICS: 13.240 - Protection against excessive pressure
• Technical Committee: CEN/TC 69 - Industrial valves
• Drafting Committee: CEN/TC 69/WG 10 - Safety devices against excessive pressure
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 13-Mar-2019
• Directive: 97/23/EC - Directive 97/23/EC of the European Parliament and of the Council of 29 May 1997 on the approximation of the laws of the Member States concerning pressure equipment
• Mandate: M/071 - Mandate to CEN for standardization in the field of Pressure equipment
• Ref Project: SIST EN ISO 4126-2:2003 - Safety devices for protection against excessive pressure - Part 2: Bursting disc safety devices (ISO 4126-2:2003)

Relations

• Replaced By: EN ISO 4126-2:2019 - Safety devices for protection against excessive pressure - Part 2: Bursting disc safety devices (ISO 4126-2:2018)
• Effective Date: 13-May-2014
• Corrected By: EN ISO 4126-2:2003/AC:2006 - Safety devices for protection against excessive pressure - Part 2: Bursting disc safety devices (ISO 4126-2:2003)
• Effective Date: 08-Jun-2022
• Corrected By: EN ISO 4126-2:2003/AC:2004 - Safety devices for protection against excessive pressure - Part 2: Bursting disc safety devices (ISO 4126-2:2003)
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2003
1DSUDYH]DYDURYDQMHSUHGYLVRNLPWODNRPGHO1DSUDYH]UD]SRþQLPL
PHPEUDQDPL,62
Safety devices for protection against excessive pressure - Part 2: Bursting disc safety
devices (ISO 4126-2:2003)
Sicherheitseinrichtungen gegen unzulässigen Überdruck - Teil 2:
Berstscheibeneinrichtungen (ISO 4126-2:2003)
Dispositifs de sécurité pour la protection contre les pressions excessives - Partie 2:
Dispositifs de sureté a disque de rupture (ISO 4126-2:2003)
Ta slovenski standard je istoveten z: EN ISO 4126-2:2003
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 4126-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2003
ICS 13.240
English version
Safety devices for protection against excessive pressure - Part
2: Bursting disc safety devices (ISO 4126-2:2003)
Dispositifs de sécurité pour la protection contre les Sicherheitseinrichtungen gegen unzulässigen Überdruck -
pressions excessives - Partie 2: Dispositifs de sûreté à Teil 2: Berstscheibeneinrichtungen (ISO 4126-2:2003)
disque de rupture (ISO 4126-2:2003)
This European Standard was approved by CEN on 9 September 2002.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4126-2:2003 E
worldwide for CEN national Members.

Contents
page
Foreword.4
Introduction .5
1 Scope .5
2 Normative references .5
3 Terms and definitions.7
4 Materials.9
4.1 Selection of materials.9
4.2 Material specifications .10
4.3 Protection from corrosion.10
5 Types of bursting discs.10
5.1 Conventional domed bursting discs (forward acting) .10
5.2 Reverse domed bursting discs (reverse acting).11
5.3 Flat bursting discs .11
5.4 Other types and designs.13
6 Bursting disc holders .13
6.1 Design .13
6.2 Types.13
6.3 Connections .15
7 Back pressure supports.16
7.1 General.16
7.2 Opening back pressure supports.16
7.3 Non-opening back pressure supports.16
8 Temperature shields.16
9 Stiffening rings.16
10 Gaskets/seals .16
11 Assembly of bursting disc safety devices .16
11.1 General.16
11.2 Bursting disc safety devices with replaceable bursting disc assemblies.17
11.3 Bursting disc safety devices with non-replaceable bursting disc assemblies.17
12 Specified bursting pressure requirements .17
13 Inspection by the manufacturer .19
14 Test procedures .19
14.1 General.19
14.2 Pressure testing.19
14.3 Burst testing.19
14.4 Leak testing .21
14.5 Non-destructive examination.21
15 Certification .21
16 Product designation .22
17 Marking .22
17.1 General.22
17.2 Bursting discs/bursting disc assemblies.23
17.3 Bursting disc holders.23
17.4 Bursting disc safety devices with non-replaceable bursting disc assemblies.24
17.5 Ancillary components .24
17.6 Omission of markings .24
18 Preparation for storage and transportation .25
18.1 General.25
18.2 Marking of packages .25
18.3 Provision of assembly and installation instructions .25
18.4 Provision of documents, loose identification plates etc. .25
Annex A (normative)  Materials .26
Annex B (informative)  Materials.28
Annex ZA (informative)  Clauses of this European Standard addressing essential requirements or
other provisions of EU Directives.33
Bibliography .34
Foreword
This document (EN ISO 4126-2:2003) has been prepared by Technical Committee CEN/TC 69 "Industrial valves",
the secretariat of which is held by AFNOR, in collaboration with ISO/TC 185 "Safety devices for protection against
excessive pressure".
This European Standard EN ISO 4126-2:2003 shall be given the status of a national standard, either by publication
of an identical text or by endorsement, at the latest by July 2003, and conflicting national standards shall be
withdrawn at the latest by July 2003.
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.
This standard for safety devices for protection against excessive pressure consists of seven parts of which this is
Part 2. The various parts are:
 Part 1: Safety valves.
 Part 2: Bursting disc safety devices.
 Part 3: Safety valves and bursting disc safety devices in combination.
 Part 4: Pilot operated safety valves.
 Part 5: Controlled safety pressure relief systems (CSPRS).
 Part 6: Application, selection and installation of bursting disc safety devices.
 Part 7: Common data.
Part 7 contains data that is common to more than one of the parts of this standard to avoid unnecessary repetition.
Annex A is normative. Annex B is informative.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,
Slovakia, Spain, Sweden, Switzerland and the United Kingdom.
Introduction
A bursting disc safety device is a non-reclosing pressure relief device used to protect pressure equipment such as
pressure vessels, piping, gas cylinders or other enclosures from excessive pressure and/or excessive vacuum.
A bursting disc safety device typically comprises an assembly of components including a bursting disc, a bursting
disc holder and, where necessary, other components such as back pressure supports, stiffening rings etc.
The bursting disc is a pressure-containing and pressure-sensitive part of the bursting disc safety device and is
designed to open by bursting at a pre-determined pressure. There are many different types of bursting disc safety
devices manufactured in corrosion resistant materials, both metallic and non-metallic, to cover a wide range of
nominal sizes, burst pressures and temperatures.
1 Scope
This part of this European Standard specifies the requirements for bursting disc safety devices.
It includes the requirements for the design, manufacture, inspection, testing, certification, marking, and packaging.
The requirements for the application, selection and installation of bursting disc safety devices are given in Part 6 of
this European Standard.
2 Normative references
This European Standard incorporates by dated or undated r
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