EN ISO 4126-6:2003

Safety devices for protection against excessive pressure - Part 6: Application, selection and installation of bursting disc safety devices (ISO 4126-6:2003)

ISO 4126-6:2003 gives guidance on the application, selection and installation of bursting disc safety devices used to protect pressure equipment from excessive pressure and/or excessive vacuum.

Sicherheitseinrichtungen gegen unzulässigen Überdruck - Teil 6: Berstscheibeneinrichtung; Anwendung, Auswahl und Einbau (ISO 4126-6:2003)

Dispositifs de sécurité contre les pressions excessives - Partie 6: Application, sélection et installation des dispositifs de sûreté à disque de rupture (ISO 4126-6:2003)

L'ISO 4126-6 donne des lignes directrices pour l'application, la sélection et l'installation de dispositifs de sûreté à disque de rupture utilisés pour protéger les équipements sous pression contre des pressions excessives et/ou des dépressions excessives.

Naprave za varovanje pred visokim tlakom - 6. del: Uporaba, izbira in vgradnja razpočnih membran (ISO 4126-6:2003)

General Information

• Status: Withdrawn
• Publication Date: 14-Dec-2003
• Withdrawal Date: 17-Jun-2014
• 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: 18-Jun-2014
• 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 4126-6:2004 - Safety devices for protection against excessive pressure - Part 6: Application, selection and installation of bursting disc safety devices (ISO 4126-6:2003)

Relations

• Replaced By: EN ISO 4126-6:2014 - Safety devices for protection against excessive pressure - Part 6: Application, selection and installation of bursting disc safety devices (ISO 4126-6:2014)
• Effective Date: 25-Jun-2014
• Corrected By: EN ISO 4126-6:2003/AC:2006 - Safety devices for protection against excessive pressure - Part 6: Application, selection and installation of bursting disc safety devices (ISO 4126-6:2003)
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2004
1DSUDYH]DYDURYDQMHSUHGYLVRNLPWODNRPGHO8SRUDEDL]ELUDLQYJUDGQMD
UD]SRþQLKPHPEUDQ,62
Safety devices for protection against excessive pressure - Part 6: Application, selection
and installation of bursting disc safety devices (ISO 4126-6:2003)
Sicherheitseinrichtungen gegen unzulässigen Überdruck - Teil 6:
Berstscheibeneinrichtung; Anwendung, Auswahl und Einbau (ISO 4126-6:2003)
Dispositifs de sécurité contre les pressions excessives - Partie 6: Application, sélection
et installation des dispositifs de sureté a disque de rupture (ISO 4126-6:2003)
Ta slovenski standard je istoveten z: EN ISO 4126-6:2003
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 4126-6
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2003
ICS 13.240
English version
Safety devices for protection against excessive pressure - Part
6: Application, selection and installation of bursting disc safety
devices (ISO 4126-6:2003)
Dispositifs de sécurité contre les pressions excessives - Sicherheitseinrichtungen gegen unzulässigen Überdruck -
Partie 6: Application, sélection et installation des dispositifs Teil 6: Berstscheibeneinrichtung; Anwendung, Auswahl und
de sûreté à disque de rupture (ISO 4126-6:2003) Einbau (ISO 4126-6:2003)
This European Standard was approved by CEN on 27 December 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 4126-6:2003 E
worldwide for CEN national Members.

Contents
Foreword.3
Introduction .4
1 Scope .5
2 Normative references .5
3 Terms and definitions.5
4 Symbols and units .9
5 Application.10
6 Selection .11
6.1 Selection of bursting disc safety devices .11
6.2 Selection of the performance tolerance .12
7 Installation .15
7.1 General.15
7.2 Location of bursting disc safety devices .15
7.3 Installation of bursting disc safety devices .16
Annex A (informative) Information to be supplied by the purchaser.17
A.1 General.17
A.2 Application details .17
A.3 Bursting disc safety device operating details .17
A.4 Installation details.17
A.5 Special details .18
A.6 Language .18
A.7 Replacement bursting discs.18
Annex B (informative) Guidelines for determining the replacement period of a bursting disc .19
B.1 Introduction .19
B.2 Bursting disc safety devices .19
B.3 Replacement period.19
B.4 Methods of determining the replacement period .20
Annex C (informative) Pressure relief system discharge capacity .21
C.1 General.21
C.2 Simplified approach.21
C.3 Comprehensive approach.25
Annex D (informative) Derivation of compressibility factor Z .27
Annex E (informative) Flow testing of bursting disc safety devices.28
E.1 Scope .28
E.2 Test requirements.28
E.3 Method of testing.31
E.4 Test procedure .32
E.5 Determination of flow resistance factor K .33
R
E.6 Application of flow resistance factor K .36
R
Bibliography .37
Foreword
This document (EN ISO 4126-6:2003) has been prepared by Technical Committee CEN/TC 69 “Industrial valves”,
the secretariat of which is held by AFNOR, in collaboration with Technical Committee ISO/TC 185 “Safety devices
for protection against excessive pressure”.
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 April 2004 and conflicting national standards shall be withdrawn at the latest by
April 2004.
This standard for safety devices for protection against excessive pressure consists of seven parts of which this is
Part 6. 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, which is common to more than one of the parts of this standard to avoid unnecessary
repetition.
Annexes A to E are informative.
This document includes a Bibliography.
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
Safety devices for the protection of pressure equipment against excessive pressure include pressure relief devices
such as safety valves and bursting disc safety devices which, dependent upon the application, may be used either
as the sole pressure relieving devices or in conjunction with each other.
Operating problems frequently arise due to the use of pressure relieving devices not having been properly selected
for the intended service or properly selected but whose performance is adversely affected by improper handling,
wrong installation or lack of maintenance, any of which may affect the safety of the pressure equipment being
protected.
It is important to consider not only the pressure relief devices but also the whole of the pressure relief system so as
not to reduce the relieving capacity below that required or adversely affect the proper operation of the pressure
relieving devices.
A bursting disc safety device is a non-reclosing pressure relief device which typically comprises a bursting disc,
which is a pressure-containing and pressure-sensitive part designed to open by bursting at a predetermined
pressure, and a bursting disc holder. 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. They are used to protect pressure equipment such as vessels, piping, gas cylinders
or other enclosures from excessive pressure and/or excessive vacuum.
This standard covers the important considerations necessary in the application, selection and installation of
bursting disc safety devices to give the required protection against excessive pressure and/or excessive vacuum.
1 Scope
This standard gives guidance on the application, selection and installation of bursting disc safety devices used to
protect pressure equipment from excessive pressure and/or excessive vacuum.
Annex A provides a checklist for the information to be supplied by the purchaser to the manufacturer.
Annex B gives guidance on the replacement period of a bursting disc and annex C guidance on determining the
mass flow rate, for single phase fluids, of a pressure relief system that contains a bursting disc safety device
Annex E is a non-mandatory procedure for establishing the flow resistance of a burst bursting disc assembly.
The requirements for the manufacture, inspection, testing, marking, certification and packaging of bursting disc
safety devices are given in Part 2 of EN ISO 4126.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
EN ISO 4126-1:2003, Safety devices for protection against excessive pressure — Part 1 : Safety valves (ISO 4126-
1:2003).
EN ISO 4126-2:2003, Safety devices for protection against excessive pressure — Part 2 : Bursting disc safety
devices (ISO 4126-2:2003).
EN ISO 4126-4, Safety devices for protection against excessive pressure — Part 4 : Pilot operated safety valves
(ISO 4126-4:2003).
EN ISO 4126-5, Safety devices for protection against excessive pressure — Part 5 : Controlled safety pressure
relief systems (CSPRS) (ISO 4126-5:2003).
EN ISO 4126-7:2003, Safety devices for protection against excessive pressure — Part 7 : Common data (ISO
4126-7:2003).
3 Terms and definitions
For the purposes of t
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