SIST EN ISO 4126-1:2013/A1:2016
(Amendment)Safety devices for protection against excessive pressure - Part 1: Safety valves (ISO 4126-1:2013/Amd 1:2016)
Safety devices for protection against excessive pressure - Part 1: Safety valves (ISO 4126-1:2013/Amd 1:2016)
Sicherheitseinrichtungen gegen unzulässigen Überdruck - Teil 1: Sicherheitsventile (ISO 4126-1:2013/Amd 1:2016)
Dispositifs de sécurité pour protection contre les pressions excessives - Partie 1: Soupapes de sûreté (ISO 4126-1:2013/Amd 1:2016)
Naprave za varovanje pred visokim tlakom - 1. del: Varnostni ventili - Dopolnilo A1 (ISO 4126-1:2013/Amd 1:2016)
General Information
- Status
- Published
- Public Enquiry End Date
- 14-Apr-2016
- Publication Date
- 16-Aug-2016
- Technical Committee
- TLP - Pressure vessels
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 08-Jul-2016
- Due Date
- 12-Sep-2016
- Completion Date
- 17-Aug-2016
Relations
- Effective Date
- 01-Sep-2016
Overview
EN ISO 4126-1:2013/A1:2016 is Amendment 1 to the European adoption of ISO 4126‑1:2013, titled Safety devices for protection against excessive pressure - Part 1: Safety valves. Published and approved by CEN in 2016, this amendment updates testing and performance tolerances for safety valves used as pressure‑relief devices. It forms part of the EN ISO 4126 series and supports essential requirements of relevant EU directives for pressure equipment.
Key topics and technical requirements
This amendment replaces Clause 7.2.1 and defines revised testing, tolerances, and verification rules for safety valves:
- Set pressure testing: Tests shall be conducted at the minimum and maximum set pressures for which the spring is designed.
- Test media:
- Valves for gas service: test with air or another gas of known characteristics, or superheated steam (≥10 °C superheat).
- Valves for steam service: test on steam, air or another known gas.
- Valves for liquid service: test on water or other liquids of known characteristics.
- Allowable tolerances / limits:
- Set pressure: ±3% of set pressure or ±0.1 bar, whichever is greater.
- Lift at overpressure: not less than manufacturer‑stated values.
- Overpressure: manufacturer‑stated value but not exceeding 10% of set pressure or 0.1 bar, whichever is greater.
- Blowdown: must not exceed manufacturer‑stated value and shall fall within specified limits:
- Compressible fluids: min 2.0% (not applicable to valves with proportional opening), max 15% or 0.3 bar, whichever is greater.
- Incompressible fluids: min 2.5% (not applicable to valves with proportional opening), max 20% or 0.6 bar, whichever is greater.
- Restricted lift valves: overpressure and blowdown tolerances same as unrestricted lift valves.
- Proportional opening valves: overpressure and blowdown must be verified as stable across lifts between manufacturer’s minimum and maximum; a lift vs overpressure curve is required.
Applications and users
This amendment is directly relevant to the specification, testing and certification of safety valves and pressure‑relief devices across industries that require protection against excessive pressure, including:
- Power generation (boilers, steam systems)
- Oil & gas and petrochemical plants
- Chemical manufacturing and process plants
- Compressed air and gas systems
- Pressure vessel and pipeline manufacturers
- HVAC, marine and industrial equipment
Primary users: safety valve manufacturers, test laboratories, design and mechanical engineers, safety managers, conformity assessors, inspection bodies and regulators.
Related standards
- EN ISO 4126‑1:2013 (base document) - see amendment A1 for updated test and tolerance rules.
- Other parts of the ISO 4126 series and national pressure equipment standards may be relevant for full compliance and system design.
Keywords: safety valves, EN ISO 4126‑1 amendment, excessive pressure protection, set pressure tolerance, overpressure, blowdown, proportional opening, restricted lift, pressure relief devices.
Frequently Asked Questions
SIST EN ISO 4126-1:2013/A1:2016 is a amendment published by the Slovenian Institute for Standardization (SIST). Its full title is "Safety devices for protection against excessive pressure - Part 1: Safety valves (ISO 4126-1:2013/Amd 1:2016)". This standard covers: Safety devices for protection against excessive pressure - Part 1: Safety valves (ISO 4126-1:2013/Amd 1:2016)
Safety devices for protection against excessive pressure - Part 1: Safety valves (ISO 4126-1:2013/Amd 1:2016)
SIST EN ISO 4126-1:2013/A1:2016 is classified under the following ICS (International Classification for Standards) categories: 13.240 - Protection against excessive pressure. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN ISO 4126-1:2013/A1:2016 has the following relationships with other standards: It is inter standard links to SIST EN ISO 4126-1:2013. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN ISO 4126-1:2013/A1:2016 is associated with the following European legislation: EU Directives/Regulations: 97/23/EC; Standardization Mandates: M/071. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
You can purchase SIST EN ISO 4126-1:2013/A1:2016 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2016
Naprave za varovanje pred visokim tlakom - 1. del: Varnostni ventili - Dopolnilo A1
(ISO 4126-1:2013/Amd 1:2016)
Safety devices for protection against excessive pressure - Part 1: Safety valves (ISO
4126-1:2013/Amd 1:2016)
Sicherheitseinrichtungen gegen unzulässigen Überdruck - Teil 1: Sicherheitsventile (ISO
4126-1:2013/Amd 1:2016)
Dispositifs de sécurité pour protection contre les pressions excessives - Partie 1:
Soupapes de sûreté (ISO 4126-1:2013/Amd 1:2016)
Ta slovenski standard je istoveten z: EN ISO 4126-1:2013/A1:2016
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.
EN ISO 4126-1:2013/A1
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2016
EUROPÄISCHE NORM
ICS 13.240
English Version
Safety devices for protection against excessive pressure -
Part 1: Safety valves - Amendment 1 (ISO 4126-
1:2013/Amd 1:2016)
Dispositifs de sécurité pour protection contre les Sicherheitseinrichtungen gegen unzulässigen
pressions excessives - Partie 1: Soupapes de sûreté - Überdruck - Teil 1: Sicherheitsventile - Änderung 1
Amendement 1 (ISO 4126-1:2013/Amd 1:2016) (ISO 4126-1:2013/Amd 1:2016)
This amendment A1 modifies the European Standard EN ISO 4126-1:2013; it was approved by CEN on 19 May 2016.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant 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 amendment 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
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4126-1:2013/A1:2016 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 4126-1:2013/A1:2016) 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 Amendment to the European Standard EN ISO 4126-1:2013 shall be given the status of a national
standard, either by publication of an identical text or by endorsement, at the latest by December 2016,
and conflicting national standards shall be withdrawn at the latest by December 2016.
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 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.
For relationship with EU Directive, see informative Annex ZA, which is an integral part of
EN ISO 4126-1:2013.
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/Amd 1:2016 has been approved by CEN as EN ISO 4126-1:2013/A1:2016
without any modification.
INTERNATIONAL ISO
STAND
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