FprEN 14071

SLOVENSKI STANDARD
01-marec-2021
Oprema in pribor za utekočinjeni naftni plin (UNP) - Varnostni ventili za tlačne
posode za UNP - Pomožna oprema
LPG equipment and accessories - Pressure relief valves for LPG pressure vessels -
Ancillary equipment
Flüssiggas-Geräte und Ausrüstungsteile - Druckentlastungsventile für Druckbehälter für
Flüssiggas (LPG) - Zusatzausrüstung
Équipements pour GPL et leurs accessoires - Soupapes de sécurité des réservoirs de
gaz de pétrole liquéfié (GPL) - Équipement auxiliaire
Ta slovenski standard je istoveten z: prEN 14071
ICS:
23.020.32 Tlačne posode Pressure vessels
23.060.40 Tlačni regulatorji Pressure regulators
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
prEN 14071
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2021
ICS Will supersede EN 14071:2015+A1:2019
English Version
LPG equipment and accessories - Pressure relief valves for
LPG pressure vessels - Ancillary equipment
Équipements pour GPL et leurs accessoires - Soupapes Flüssiggas-Geräte und Ausrüstungsteile -
de sécurité des réservoirs de gaz de pétrole liquéfié Druckentlastungsventile für Druckbehälter für
(GPL) - Équipement auxiliaire Flüssiggas (LPG) - Zusatzausrüstung
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 286.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14071:2021 E
worldwide for CEN national Members.

prEN 14071:2021 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Operating conditions . 9
5 Materials . 9
5.1 General . 9
5.2 Metallic materials . 9
5.3 Non-metallic components . 10
5.4 Lubricants, sealants, and adhesives . 10
5.5 Inspection Documents . 10
6 Design . 11
6.1 Introduction . 11
6.2 Pressure relief valve isolating devices . 11
6.2.1 General . 11
6.2.2 Actuation . 11
6.2.3 Indication of closure . 11
6.2.4 Guiding arrangements . 12
6.2.5 Isolating mechanism security . 12
6.2.6 Interchangeability . 12
6.3 PRV manifold . 12
6.3.1 General . 12
6.3.2 Indication of port closure . 15
6.3.3 Port closure . 15
6.4 Vent pipe . 15
6.4.1 Design . 15
6.4.2 Materials . 15
6.4.3 Effect from external conditions. 15
6.5 Connections . 15
6.6 Threads . 15
6.7 Minimum requirements for springs . 16
7 Testing of the design . 16
7.1 General . 16
7.2 Test requirements . 16
7.3 Hydraulic proof test . 17
7.4 Relief valve isolator test . 17
7.5 Testing of audible signal of isolating devices and residual flow of isolating devices
and PRV manifolds . 17
7.6 Resistance of the isolating mechanism . 17
7.7 Over-torque deformation test . 17
7.8 Operation test . 18
7.8.1 General . 18
7.8.2 System test . 18
7.9 Stress cracking test . 18
prEN 14071:2021 (E)
7.9.1 General . 18
7.9.2 Mercury(I)nitrate immersion test . 18
7.9.3 Moist ammonia air stress cracking test . 18
8 Production testing of isolating devices and PRV manifolds . 18
9 Marking and labelling . 19
9.1 PRV isolating device . 19
9.2 Pressure relief valve PRV manifolds. 19
10 User instructions. 19
10.1 PRV isolating devices . 19
10.2 PRV manifolds . 20
Annex A (normative) Dimensions of master test pieces for PRV and isolating devices . 21
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2014/68/EU (Pressure equipment Directive) aimed to be
covered . 23
Bibliography . 24

prEN 14071:2021 (E)
European foreword
This document (prEN 14071:2021) has been prepared by Technical Committee CEN/TC 286 “LPG
equipment and accessories”, the secretariat of which is held by NSAI.
This document is currently submitted to the CEN Enquiry.
This document has been prepared under a standardization request 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 document will supersede EN 14071:2015+A1:2019.
The major changes in comparison to the previous edition include:
— Revision of 5.2 Metallic materials;
— Revision to the resistance of the isolating mechanism test;
— Revision of the Kd value for M 36;
— Revision of Annex ZA.
prEN 14071:2021 (E)
Introduction
This document calls for the use of substances and procedures that may be injurious to health and/or the
environment if adequate precautions are not taken. It refers only to technical suitability: it does not
absolve the user from their legal obligations at any stage.
It is recommended that manufacturers develop an environmental management policy. For guidance, see
the EN ISO 14000 series [1], [2] and [3].
Protection of the environment is a key political issue in Europe and elsewhere. For TC 286 this is covered
in CEN/TS 16765 [4] LPG equipment and accessories - Environmental considerations for CEN/TC 286
standards, and this Technical Specification should be read in conjunction with this document. The
Technical Specification provides guidance on the environmental aspects to be considered regarding
equipment and accessories produced for the LPG industry and the following is
...