LPG equipment and accessories - Pressure relief valves for transportable refillable cylinders for Liquefied Petroleum Gas (LPG)

This European Standard specifies the design, testing and marking requirements for spring loaded pressure relief valves (PRV), for use in liquefied petroleum gas (LPG) cylinders.
These PRVs can be either an integral part of a cylinder valve (see EN ISO 14245 [3] and EN ISO 15995 [4]) or a separate device.
This European Standard does not exclude the use of other designs of pressure relief devices that provide a similar level of safety.

Flüssiggas-Geräte und Ausrüstungsteile - Sicherheitsventile für ortsbewegliche, wiederbefüllbare Flaschen für Flüssiggas (LPG)

Dieses Dokument legt die Anforderungen an die Auslegung, Prüfung und Kennzeichnung von federbelasteten Sicherheitsventilen (PRV, en: pressure relief valves) für die Verwendung in Flaschen für Flüssiggas (LPG, en: liquefied petroleum gas) mit einem Fassungsraum von 0,5 l bis einschließlich 150 l fest.
Bei diesen Sicherheitsventilen kann es sich entweder um ein fest eingebautes Teil eines Flaschenventils (siehe EN ISO 14245 [4] und EN ISO 15995 [5]) oder um eine getrennte Einrichtung handeln.

Équipements et accessoires GPL - Soupapes de sécurité des bouteilles transportables et rechargeables pour gaz de pétrole liquéfiés (GPL)

Le présent document spécifie les exigences de conception, d'essais et de marquage des soupapes de sécurité à action par ressort, utilisées pour les bouteilles de gaz de pétrole liquéfiés (GPL) d'une capacité en eau comprise entre 0,5 l et 150 l inclus.
Ces soupapes peuvent faire partie intégrante du robinet de la bouteille (voir l'EN ISO 14245 [4] et l'EN ISO 15995 [5]) ou constituer un dispositif séparé.

Oprema in pribor za utekočinjeni naftni plin (UNP) - Varnostni ventili za premične, ponovno polnljive jeklenke za UNP

General Information

Status
Published
Public Enquiry End Date
03-Aug-2019
Publication Date
11-Jan-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
05-Jan-2021
Due Date
12-Mar-2021
Completion Date
12-Jan-2021

RELATIONS

Buy Standard

Standard
SIST EN 13953:2021
English language
21 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN 13953:2021
01-februar-2021
Nadomešča:
SIST EN 13953:2015

Oprema in pribor za utekočinjeni naftni plin (UNP) - Varnostni ventili za premične,

ponovno polnljive jeklenke za UNP

LPG equipment and accessories - Pressure relief valves for transportable refillable

cylinders for Liquefied Petroleum Gas (LPG)
Flüssiggas-Geräte und Ausrüstungsteile - Sicherheitsventile für ortsbewegliche,
wiederbefüllbare Flaschen für Flüssiggas (LPG)

Équipements et accessoires GPL - Soupapes de sécurité des bouteilles transportables

et rechargeables pour gaz de pétrole liquéfiés (GPL)
Ta slovenski standard je istoveten z: EN 13953:2020
ICS:
23.020.35 Plinske jeklenke Gas cylinders
23.060.40 Tlačni regulatorji Pressure regulators
SIST EN 13953:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 13953:2021
---------------------- Page: 2 ----------------------
SIST EN 13953:2021
EN 13953
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2020
EUROPÄISCHE NORM
ICS 23.060.40 Supersedes EN 13953:2015
English Version
LPG equipment and accessories - Pressure relief valves for
transportable refillable cylinders for Liquefied Petroleum
Gas (LPG)

Équipements et accessoires GPL - Soupapes de sécurité Flüssiggas-Geräte und Ausrüstungsteile -

des bouteilles transportables et rechargeables pour gaz Sicherheitsventile für ortsbewegliche,

de pétrole liquéfiés (GPL) wiederbefüllbare Flaschen für Flüssiggas (LPG)
This European Standard was approved by CEN on 1 June 2020.

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, 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13953:2020 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 13953:2021
EN 13953:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 5

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 6

3 Terms and definitions ................................................................................................................................... 7

4 Operating Conditions ..................................................................................................................................... 8

5 Materials ............................................................................................................................................................. 9

5.1 General ................................................................................................................................................................ 9

5.2 Metallic materials ........................................................................................................................................... 9

5.3 Non-metallic materials .................................................................................................................................. 9

5.4 Lubricants, sealants and adhesives ....................................................................................................... 10

6 Design ............................................................................................................................................................... 10

6.1 General ............................................................................................................................................................. 10

6.2 Threads ............................................................................................................................................................ 11

6.3 Springs ............................................................................................................................................................. 11

7 Type testing .................................................................................................................................................... 11

7.1 General ............................................................................................................................................................. 11

7.2 Test requirements ....................................................................................................................................... 12

7.3 Dimensional checks ..................................................................................................................................... 13

7.4 Hydraulic pressure proof test.................................................................................................................. 13

7.5 Leak tightness test before ageing ........................................................................................................... 13

7.6 Start to discharge pressure test .............................................................................................................. 14

7.7 Discharge capacity test .............................................................................................................................. 14

7.8 Leak tightness tests ..................................................................................................................................... 14

7.9 Endurance test .............................................................................................................................................. 14

7.10 Visual inspection .......................................................................................................................................... 15

8 Test report ...................................................................................................................................................... 15

9 Production testing ....................................................................................................................................... 15

10 Marking ............................................................................................................................................................ 15

11 Documentation .............................................................................................................................................. 16

Annex A (informative) Terms used with PRVs ............................................................................................... 17

Annex B (normative) Special low temperature requirements for PRVs ............................................... 18

Annex C (normative) Sizing of PRVs for LPG cylinders ................................................................................ 19

Annex D (normative) Production testing ......................................................................................................... 20

D.1 General ............................................................................................................................................................. 20

D.2 Setting and leak testing of PRVs .............................................................................................................. 20

D.3 Batch samples ................................................................................................................................................ 20

---------------------- Page: 4 ----------------------
SIST EN 13953:2021
EN 13953:2020 (E)

D.4 Rejection criteria .......................................................................................................................................... 20

D.5 Documentation .............................................................................................................................................. 20

Bibliography ................................................................................................................................................................. 21

---------------------- Page: 5 ----------------------
SIST EN 13953:2021
EN 13953:2020 (E)
European foreword

This document (EN 13953:2020) has been prepared by Technical Committee CEN/TC 286 “LPG

Equipment and accessories”, the secretariat of which is held by NSAI.

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 June 2021, and conflicting national standards shall be

withdrawn at the latest by June 2021.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 13953:2015.
The major changes to this revision include:
— addition of water capacity range in the scope;
— addition of requirements for rubber material;
— change to the nominal set pressure;
— clarification to discharge capacity test;
— clarification to endurance test
This document has been submitted for reference in
— the RID and/or
— the technical annexes of the ADR

NOTE These regulations take precedence over any clause of this standard. It is emphasized that RID/ADR are

being revised regularly at intervals of two years which may lead to temporary non-compliances with the clauses of

this standard.”

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the

following countries are bound to implement this European Standard: 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 the United

Kingdom.
---------------------- Page: 6 ----------------------
SIST EN 13953:2021
EN 13953:2020 (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.

Protection of the environment is a key political issue in Europe and elsewhere around the world.

Protection of the environment in this document is understood in a very broad sense. The phrase is used,

for example, in relation to the total life-cycle aspects of a product on the environment, including

expenditure of energy, and during all phases of its existence, from mining of raw materials, to fabrication,

packaging, distribution, use, scrapping, recycling of materials, etc.

It is essential that provisions be restricted to a general guidance. Limit values are specified in national

laws.

Protection of the environment is a key political issue in Europe and elsewhere, for CEN/TC 286 this is

covered in CEN/TS 16765 [2], LPG equipment and accessories – Environmental considerations for

CEN/TC 286 standards, and this Technical Specification should be read in conjunction with this standard.

It has been assumed in the drafting of this document that the execution of its provisions is entrusted to

appropriately qualified and experienced people.
All pressures are gauge pressures unless otherwise stated.

In this European Standard the unit bar is used, due to its universal use in the field of technical gases. It

should, however, be noted that bar is not an SI unit, and that the corresponding SI unit for pressure is Pa

5 5 2
(1 bar = 10 Pa = 10 N/m ).

NOTE This document requires measurement of material properties, dimensions and pressures. All such

measurements are subject to a degree of uncertainty due to tolerances in measuring equipment, etc. It may be

beneficial to refer to the leaflet “measurement uncertainty leaflet” SP INFO 2000 27 [3].

---------------------- Page: 7 ----------------------
SIST EN 13953:2021
EN 13953:2020 (E)
1 Scope

This document specifies the design, testing and marking requirements for spring loaded pressure relief

valves (PRV), for use in liquefied petroleum gas (LPG) cylinders of water capacity of 0,5 l up to and

including 150 l.

These PRVs can be either an integral part of a cylinder valve (see EN ISO 14245 [4] and EN ISO 15995

[5]) or a separate device.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 549, Rubber materials for seals and diaphragms for gas appliances and gas equipment

EN 751-1, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and

hot water - Part 1: Anaerobic jointing compounds

EN 751-2, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and

hot water - Part 2: Non-hardening jointing compounds

EN 751-3, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and

hot water - Part 3: Unsintered PTFE tapes

EN 837-1, Pressure gauges - Part 1: Bourdon tube pressure gauges - Dimensions, metrology, requirements

and testing
EN 12164, Copper and copper alloys - Rod for free machining purposes
EN 12165, Copper and copper alloys - Wrought and unwrought forging stock
EN 12420, Copper and copper alloys - Forgings

EN 13906-1, Cylindrical helical springs made from round wire and bar - Calculation and design - Part 1 :

Compression springs

EN ISO 11114-1, Gas cylinders - Compatibility of cylinder and valve materials with gas contents - Part 1:

Metallic materials (ISO 11114-1)

EN ISO 11114-2, Gas cylinders - Compatibility of cylinder and valve materials with gas contents - Part 2:

Non-metallic materials (ISO 11114-2)

ISO 2859-1:1999, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by

acceptance quality limit (AQL) for lot-by-lot inspection
---------------------- Page: 8 ----------------------
SIST EN 13953:2021
EN 13953:2020 (E)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
liquefied petroleum gas
LPG

low pressure liquefied gas composed of one or more light hydrocarbons which are assigned to UN 1011,

UN 1075, UN 1965, UN 1969 or UN 1978 only and which consists mainly of propane, propene, butane,

butane isomers, butene with traces of other hydrocarbon gases
3.2
pressure relief valve
PRV

self-closing valve which automatically, without the assistance of any energy other than that of the vapour

concerned, discharges vapour at a predetermined pressure
Note 1 to entry: This is known as a “safety valve” in ADR.
3.3
nominal set pressure

predetermined pressure of the pressure relief valve at which the valve is set to start to discharge

3.4
start to discharge pressure

inlet pressure at which a steady stream of bubbles appear at the outlet of a pressure relief valve through

a water seal of not more than 50 mm water column, or other equivalent method
3.5
pop action

rapid opening of the pressure relief valve sealing element so that the pressure relief valve is fully open,

resulting from an increase of inlet pressure creating a sudden increase in force and compression of the

spring
3.6
overpressure
pressure increase between the nominal set pressure and the flow rating pressure
Note 1 to entry: Usually expressed as a percentage of nominal set pressure.
3.7
reseat pressure

inlet pressure at which the sealing element effects a seal with the valve seat after the valve has been

subjected to pop action
3.8
flow rating pressure
inlet pressure at which the discharge capacity is measured
---------------------- Page: 9 ----------------------
SIST EN 13953:2021
EN 13953:2020 (E)
3.9
discharge capacity

capacity at the flow rating pressure of a pressure relief valve expressed in m /min of free air at STP

3.10
nominal discharge capacity

minimum discharge capacity at the flow rating pressure expressed in m /min of free air at STP rounded

down to one decimal place
3.11
sealing element

non-metallic resilient component which affects a seal by contact with the valve seat

3.12
valve seat

normally raised area of the valve body on to which the sealing element effects a seal

3.13
cylinder valve

primary shutoff device intended for liquid filling and liquid or vapour service fitted to LPG cylinders

Note 1 to entry: The valve can also include additional devices e.g. liquid level indicator, excess flow device,

pressure relief valve, sediment tube, non-return valve and eduction tube.
3.14
leak tightness

resistance to leakage to atmosphere across the valve seat or any other pressure containing component

when the valve is closed
3.15
Standard Temperature and Pressure
STP
15,6 °C (288,7 K), 1,013 bar absolute (0,101 3 MPa absolute)
4 Operating Conditions
4.1 Terms used with PRVs are described graphically in Annex A.
4.2 Valves designed in accordance with this document shall be suitable for:
— a minimum operating temperature of −20 °C.

— a minimum operating temperature of −40 °C for those parts of Europe where valves are subject to

more severe temperature conditions. The material and design shall be shown to be satisfactory for

operations under these conditions and shall meet the requirements of Annex B. Where the PRV is

integral with a cylinder valve suitable for temperature of −40 °C, the PRV shall also be designed and

tested for a temperature of −40 °C; and
— a maximum operating temperature of 65 °C.
---------------------- Page: 10 ----------------------
SIST EN 13953:2021
EN 13953:2020 (E)
5 Materials
5.1 General

5.1.1 Materials in contact with LPG shall be physically and chemically compatible with LPG under all

normal operating conditions for which the valve is intended and shall meet the requirements in

accordance with EN ISO 11114-1 and EN ISO 11114-2.

5.1.2 Materials for valve components shall be selected to give adequate strength in service.

Consideration should be given to all modes of failure including atmospheric corrosion, brass

dezincification, stress corrosion, impact or material failure.

5.1.3 Alternative materials to those listed in 5.2 are not precluded, providing they can be shown to be

equivalent.

5.1.4 Where PRVs are an integral part of a cylinder valve, the material requirements for the cylinder

valve standard shall be complied with, e.g. EN ISO 15995 and EN ISO 14245.
5.2 Metallic materials
5.2.1 Hot stamped brass shall be non-porous and shall be suita
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.