Small craft - Liquefied petroleum gas (LPG) systems (ISO 10239:2014)

This International Standard covers the installation of permanently installed liquefied petroleum gas
LPG systems and LPG burning appliances on small craft of up to 24 m length of hull.
It does not cover devices used for LPG-fuelled propulsion engines or LPG-driven generators.
This International Standard covers cooking appliances with internal LPG cartridges, with a capacity of
225 g or less (See Annex D).
It covers storage of all LPG cylinders but is not intended to regulate the technical requirements for such
cylinders that are subject to national regulations
It does not contain procedures for commissioning the LPG installation.
NOTE New designs, materials and methods of assembly giving at least equivalent results can be considered
to be complying with the requirements of this International Standard when approved by a relevant body.

Kleine Wasserfahrzeuge - Flüssiggas-Anlagen (LPG) (ISO 10239:2014)

Petits navires - Installations alimentées en gaz de pétrole liquéfiés (GPL) (ISO 10239:2014)

L'ISO 10239:2014 couvre l'installation des systèmes alimentées en gaz de pétrole liquéfié (GPL) installés à demeure et les appareils brûlant du GPL installés sur les petits navires d'une longueur de coque inférieure ou égale à 24 m.
Elle ne couvre pas les dispositifs utilisés pour les moteurs de propulsion alimentés en GPL ou les générateurs alimentés au GPL.
Elle couvre les appareils comportant des cartouches de GPL d'une capacité inférieure ou égale à 225 g.
Elle couvre le stockage de toutes les bouteilles de GPL mais n'est pas destinée à réglementer les exigences techniques des bouteilles de GPL, soumises aux réglementations nationales.
Elle ne comprend pas de procédures de mise en service des installations au GPL.

Mala plovila - Sistemi za utekočinjeni naftni plin (LPG) (ISO 10239:2014)

Ta mednarodni standard zajema namestitev trajno nameščenih sistemov za utekočinjeni naftni plin (LPG) in aparatov na utekočinjeni naftni plin na malih plovilih z dolžino trupa do 24 m.
Ne zajema naprav, ki se uporabljajo v pogonskih motorjih na utekočinjeni naftni plin ali generatorjih na utekočinjeni naftni plin.
Ta mednarodni standard zajema aparate za pripravo hrane z notranjimi kartušami z utekočinjenim naftnim plinom s prostornino 225 g ali manj (glej dodatek D).
Zajema shranjevanje vseh jeklenk za utekočinjeni naftni plin, ni pa namenjen urejanju tehničnih zahtev za take jeklenke, za katere veljajo nacionalni predpisi.
Ne vsebuje postopkov za začetek obratovanja inštalacije za utekočinjeni naftni plin.
OPOMBA Upoštevati je mogoče nove modele, materiale in metode sestavljanja, ki dajejo vsaj enakovredne rezultate,
s čimer se izpolnijo zahteve tega mednarodnega standarda, ko ga odobri ustrezen organ.

General Information

Status
Published
Public Enquiry End Date
14-Jun-2017
Publication Date
11-Sep-2017
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
05-Sep-2017
Due Date
10-Nov-2017
Completion Date
12-Sep-2017

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Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 10239:2017
01-oktober-2017
1DGRPHãþD
SIST EN ISO 10239:2015
0DODSORYLOD6LVWHPL]DXWHNRþLQMHQLQDIWQLSOLQ /3*  ,62
Small craft - Liquefied petroleum gas (LPG) systems (ISO 10239:2014)
Kleine Wasserfahrzeuge - Flüssiggas-Anlagen (LPG) (ISO 10239:2014)
Petits navires - Installations alimentées en gaz de pétrole liquéfiés (GPL) (ISO
10239:2014)
Ta slovenski standard je istoveten z: EN ISO 10239:2017
ICS:
47.080 ýROQL Small craft
75.160.30 Plinska goriva Gaseous fuels
SIST EN ISO 10239:2017 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 10239:2017

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SIST EN ISO 10239:2017


EN ISO 10239
EUROPEAN STANDARD

NORME EUROPÉENNE

August 2017
EUROPÄISCHE NORM
ICS 47.080 Supersedes EN ISO 10239:2014
English Version

Small craft - Liquefied petroleum gas (LPG) systems (ISO
10239:2014)
Petits navires - Installations alimentées en gaz de Kleine Wasserfahrzeuge - Flüssiggas-Anlagen (LPG)
pétrole liquéfiés (GPL) (ISO 10239:2014) (ISO 10239:2014)
This European Standard was approved by CEN on 16 July 2017.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10239:2017 E
worldwide for CEN national Members.

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SIST EN ISO 10239:2017
EN ISO 10239:2017 (E)
Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2013/53/EU . 4
2

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SIST EN ISO 10239:2017
EN ISO 10239:2017 (E)
European foreword
The text of ISO 10239:2014 has been prepared by Technical Committee ISO/TC 188 “Small craft” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 10239:2017.
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 February 2018, and conflicting national standards shall
be withdrawn at the latest by February 2018.
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 ISO 10239:2014.
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.
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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
the United Kingdom.
Endorsement notice
The text of ISO 10239:2014 has been approved by CEN as EN ISO 10239:2017 without any modification.
3

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SIST EN ISO 10239:2017
EN ISO 10239:2017 (E)
Annex ZA
(informative)

Relationship between this European Standard and the Essential
Requirements of EU Directive 2013/53/EU
This European standard has been prepared under a mandate given to CEN by the European Commission
to provide one means of conforming to Essential Requirements of the New Approach Directive
2013/53/EU.
Once this standard is cited in the Official Journal of the European Union under that Directive and has been
implemented as a national standard in at least one member state, compliance with the normative clauses
of this standard given in Table ZA.1 confers, within the limits of the scope of this standard, a presumption
of conformity with the relevant Essential Requirements of that Directive and associated EFTA
regulations.
Table ZA.1 — Correspondence between this European Standard and Directive 2013/53/EU
Clauses/sub-clauses of Essential requirements (ERs) of Comments
this European Standard EU Directive 2013/53/EU
1, 2, 3, 4, 5, 6, 7, 8 ,9 ,10, 11, I.A.5.5 – Gas System This standard satisfies the legal
13, requirements of this essential
requirement in respect of Liquid
Annex A,
Petroleum Gas systems. Attention
Annex B,
shall be paid to the limitations set
Annex D
out in the scope in respect of its
application to propulsion engines,
generators and commissioning of
installations.

An appliance shall be used for the
application intended by the
manufacturer and installed in
accordance with the
manufacturer’s instructions in
accordance with clause 7.1; there
is no specific legal requirement for
appliances to be equipped with a
flame failure device effective on all
burners (clause 7.3) although they
may be provided by the
manufacturer.

Annex D applies in respect of
cooking appliances with integral
LPG cartridges with a capacity of
225 g or less.

4

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SIST EN ISO 10239:2017
EN ISO 10239:2017 (E)
The use of a pressure gauge in the
high pressure side of the system
will not detect cylinder valve ‘let
by’ or ’creep’ which, if suspected,
should be tested for separately.
Clause 6.5, 7.7, 7.9, 1.A.5.6.1 - Fire protection, general Annex D applies in respect of
cooking appliances with integral
Annex C,
LPG cartridges with a capacity of
Annex D
225 g or less.
Clause 12, 1.A.2.5 - Owner’s manual Annex D applies in respect of
cooking appliances with integral
Annex C,
LPG cartridges with a capacity of
Annex D.9
225 g or less.

WARNING: Other requirements and other EU Directives may be applicable to the product(s) falling
within the scope of this standard.

5

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SIST EN ISO 10239:2017

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SIST EN ISO 10239:2017
INTERNATIONAL ISO
STANDARD 10239
Third edition
2014-12-01
Small craft — Liquefied petroleum gas
(LPG) systems
Petits navires — Installations alimentées en gaz de pétrole
liquéfiés (GPL)
Reference number
ISO 10239:2014(E)
©
ISO 2014

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SIST EN ISO 10239:2017
ISO 10239:2014(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2014
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2014 – All rights reserved

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SIST EN ISO 10239:2017
ISO 10239:2014(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 General provisions. 3
5 Pressure regulation device . 4
6 LPG supply line . 5
6.1 General . 5
6.2 Piping . 5
6.3 Hoses and hose lines . 6
6.4 Materials . 6
6.5 Installation . 6
6.6 Shut-off valves . 7
7 Appliances . 8
8 Location and installation of LPG cylinders. 9
9 Ventilation . 9
10 LPG installation tightness tests .10
11 Ignition protection from electrical devices .10
12 Owner’s manual.10
13 Ducts and flues for air intake and combustion product discharge .10
Annex A (informative) Design guidelines for pressure drop due to pipe resistance .12
Annex B (normative) Ventilation.13
Annex C (normative) Instructions to be included with the owner’s manual .14
Annex D (normative) Cooking appliances with integral LPG cartridges with a capacity of
225 g or less .16
Bibliography .17
© ISO 2014 – All rights reserved iii

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SIST EN ISO 10239:2017
ISO 10239:2014(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directives
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any
patent rights identified during the development of the document will be in the Introduction and/or on
the ISO list of patent declarations received. www.iso.org/patents
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT), see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 188, Small craft.
This third edition cancels and replaces the second edition (ISO 10239:2008), which has been technically
revised. The major technical changes include:
— suitable user and manufacturer checks of the LPG system tightness;
— specifying a suitable hose material;
— describing the information to be provided in the owner’s manual;
— clarification on LPG powered fuel cells included or excluded from standard.
iv © ISO 2014 – All rights reserved

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SIST EN ISO 10239:2017
ISO 10239:2014(E)

Introduction
This International Standard does not contain procedures for commissioning new LPG installations or
system maintenance or upgrades. Competent persons responsible for commissioning LPG installations
should use relevant national codes and procedures appropriate to the country concerned.
© ISO 2014 – All rights reserved v

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SIST EN ISO 10239:2017

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SIST EN ISO 10239:2017
INTERNATIONAL STANDARD ISO 10239:2014(E)
Small craft — Liquefied petroleum gas (LPG) systems
1 Scope
This International Standard covers the installation of permanently installed liquefied petroleum gas
LPG systems and LPG burning appliances on small craft of up to 24 m length of hull.
It does not cover devices used for LPG-fuelled propulsion engines or LPG-driven generators.
This International Standard covers cooking appliances with internal LPG cartridges, with a capacity of
225 g or less (See Annex D).
It covers storage of all LPG cylinders but is not intended to regulate the technical requirements for such
cylinders that are subject to national regulations
It does not contain procedures for commissioning the LPG installation.
NOTE New designs, materials and methods of assembly giving at least equivalent results can be considered
to be complying with the requirements of this International Standard when approved by a relevant body.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 7-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances
and designation
ISO 8434-1:2007, Metallic tube connections for fluid power and general use — Part 1: 24 degree cone connectors
ISO 8846, Small craft — Electrical devices — Protection against ignition of surrounding flammable gases
1)
ISO 9094 , Small craft — Fire protection
ISO 10133, Small craft — Electrical systems — Extra-low-voltage d.c. installations
ISO 10240, Small craft — Owner’s manual
ISO 12217-1, Small craft — Stability and buoyancy assessment and categorization — Part 1: Non-sailing
boats of hull length greater than or equal to 6 m
ISO 13297, Small craft — Electrical systems — Alternating current installations
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 1254-2, Copper and copper alloys - Plumbing fittings - Part 2: Fittings with compression ends for use
with copper tubes
EN 1949, Specification for the installation of LPG systems for habitation purposes in leisure accommodation
vehicles and in other road vehicles

1) Under preparation.
© ISO 2014 – All rights reserved 1

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SIST EN ISO 10239:2017
ISO 10239:2014(E)

EN 14291, Foam producing solutions for leak detection on gas installations
EN 15266, Stainless steel pliable corrugated tubing kits in buildings for gas with an operating pressure
up to 0,5 bar
EN 16129:2013, Pressure regulators, automatic change-over devices, having a maximum regulated pressure
of 4 bar, with a maximum capacity of 150 kg / h, associated safety devices and adaptors for butane, propane,
and their mixtures
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
liquefied petroleum gas
LPG
mixture of light hydrocarbons, gaseous under conditions of normal temperature and pressure, and
maintained in the liquid state by increase of pressure or lowering of temperature
Note 1 to entry: The principal components are propane, propene, butanes or butenes.
Note 2 to entry: LPG can be obtained as commercial butane, commercial propane or a mixture of the two.
[SOURCE: EN 624:2011, 3.1.7 — modified with addition of Note 2 to entry]
3.2
permanently installed
securely fastened so that tools need to be used for removal
[SOURCE: ISO 10088:2013, definition 3.3]
3.3
cylinder housing
ventilated enclosure intended solely for storage of one or more LPG cylinders, pressure regulation device
and safety devices, and located so that leakage flows to the outside
3.4
cylinder locker
enclosure which is vapour tight to the interior of the craft with a drain to the outside intended solely for
storage of one or more LPG cylinders in a cockpit or recessed into the craft
3.5
LPG system
system consisting of an arrangement of cylinder(s), safety device(s), pressure regulation device(s),
connection(s), valve(s), piping, tubing, hose, fitting(s) and devices intended to store, supply, monitor or
control the flow of LPG up to and including the appliance
Note 1 to entry: The cylinders are replacement items and might or might not be supplied with the LPG system
in the craft.
3.6
interior space
enclosed space that is surrounded by permanent boat structure and that is intended to remain dry
during normal use
3.7
readily accessible
capable of being reached quickly and safely for maintenance or effective use under emergency conditions
without the use of tools
[SOURCE: ISO 10088:2013, definition 3.2]
2 © ISO 2014 – All rights reserved

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SIST EN ISO 10239:2017
ISO 10239:2014(E)

3.8
unattended appliance
device intended to function without the constant attention of an operator and which can cycle on and
off automatically
3.9
high pressure side
part of an installation between the cylinder valve and the inlet of a pressure regulation device in a LPG
system
2)
Note 1 to entry: Vapour pressure at 20 °C for propane = 700 kPa and for butane = 175 kPa .
3.10
low pressure side
part of an installation exposed to the regulated pressure of the LPG pressure regulation device in a LPG
system
3.11
pressure regulation device
device to reduce the high pressure of the LPG system to the required operating pressure of the appliances
3.12
piping
pipeline of rigid metallic material
[SOURCE: EN 624:2011, definition 3.1.8]
3.13
hose
pipeline of flexible material
3.14
shut-off valve
device to isolate an appliance from the gas supply
3.15
main shut-off valve
device to isolate the entire LPG system from the high pressure side of the supply
3.16
flame supervision device
device that has a sensing element, that causes the inlet of the LPG supply to a burner to be open in the
presence of a flame and closed in the absence of a flame
3.17
operating pressure
inlet pressure of the LPG appliances
3.18
ventilator
device that allows air to pass into and out of an interior space
4 General provisions
4.1 An LPG system and all its components shall be capable of withstanding storage at −30 °C to +60 °C.
4.2 LPG systems shall be of the vapour withdrawal type, i.e. LPG released only under gas phase conditions.
2) 100 kPa = 1 bar.
© ISO 2014 – All rights reserved 3

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SIST EN ISO 10239:2017
ISO 10239:2014(E)

4.3 All LPG appliances installed on a single LPG system shall be designed for use at the same operating
pressure and the same LPG type, e.g. propane, butane, or a mixture of the two. The operating pressure
shall be clearly labelled in the vicinity of the cylinder shut-off valve.
The cylinder(s) selected and other supply equipment shall be of sufficient capacity to ensure safe and
satisfactory operation of all appliances simultaneously. The cylinder locker or cylinder housing shall be
capable of accommodating the capacity of cylinders needed.
4.4 Where an additional LPG system is installed:
— there shall be no connection between each of the LPG supplies;
— the cylinder(s) for each gas supply may be installed in the same cylinder locker or cylinder housing.
If an additional cylinder locker or cylinder housing is used, there shall be a warning sign inside each
cylinder locker or cylinder housing which indicates that there is an additional LPG supply
Inside the cylinder locker or cylinder housing it shall be clearly indicated which appliances are supplied
by each LPG supply. This shall also be stated in the owner’s manual.
4.5 Each LPG system shall be fitted with simple means to test the LPG system for leakage before use of
any appliances (e.g. a pressure gauge, bubble leak tester).
Where a bubble leak detector is fitted in the LPG system, it shall be securely mounted in the low pressure
side of the LPG system and in the cylinder housing or cylinder locker.
If pressure gauges are used, they shall read the cylinder pressure side of the pressure regulation device.
The gauge scale shall have a pressure range from 0 kPa to a maximum of between 1 000 kPa and
1 600 kPa to be able to show pressure drops during the LPG system check (see C.3).
5 Pressure regulation device
5.1 Each LPG system shall be equipped with, or have provision for the installation of, a pressure
regulation device (see 3.11). This device shall be designed to provide a defined operating pressure suitable
for the consuming appliances, but not more than 5 kPa. A label indicating the operating pressure of the
LPG appliances installed shall be affixed in the vicinity of the LPG cylinder locker or cylinder housing.
5.2 The LPG pressure regulation device shall have an overpressure unit to prevent uncontrolled
pressure increase in the low pressure side to a value above 15 kPa. Any LPG discharge of the unit shall be
inside the cylinder locker or housing, or shall be separately vented outside the craft. The unit may be a
pressure relief governor, a pressure relief valve or an automatic safety shut off valve.
5.3 The operating pressure shall be marked on the pressure regulation device.
5.4 Pressure regulation devices with external manual output pressure adjustment shall not be fitted.
5.5 The pressure regulation device shall be located within the cylinder locker or housing.
5.6 If not rigidly connected to, and supported by, the cylinder connection, the pressure regulation device
shall be separately secured within the cylinder locker or cylinder housing to protect it from damage and
exposure to dirt and water.
It shall be mounted above the cylinder valve so that the flow of LPG from the cylinder valve is always in
a rise to the pressure regulation device.
4 © ISO 2014 – All rights reserved

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SIST EN ISO 10239:2017
ISO 10239:2014(E)

5.7 Pressure regulation devices shall be made of corrosion-resistant metallic material or have an
effective coating against external corrosion. Fasteners used shall be of corrosion-resistant material or
have a corrosion-resistant plating or coating.
NOTE Pressure regulation devices in accordance with EN 16129:2013, Annex M, meet these requirements.
6 LPG supply line
6.1 General
6.1.1 The LPG supply line shall be either solid piping in accordance with 6.2, except for short hose
connections to the pressure regulation device or to stoves, or continuous hose in accordance with 6.3.
The layout of the supply line shall be such that the length of piping and hoses is as short as possible.
6.1.2 Hoses shall be used to connect
— gimballed stoves to their LPG supply,
— supply piping to the pressure regulation device (either high or low pressure side of the system).
The hose and its connections to the pressure regulation device shall be within the cylinder locker or
cylinder housing.
6.1.3 Piping and hose shall be sized so that any pressure drop due to pipe resistance does not reduce
the operating pressure at any appliance below that required by the appliance manufacturer when all
appliances are operating simultaneously. See Annex A.
6.2 Piping
6.2.1 Only solid drawn copper or drawn stainless steel piping shall be used for rigid supply lines.
Attention should be given to galvanic compatibility when connecting different materials.
Wall thickness for piping shall be equal or greater than 0,6 mm for piping up to 12 mm outside diameter
and a minimum of 0,9 mm for piping with an outside diameter greater than 12 mm. Semi-rigid, pliable
corrugated stainless steel tubing (PCT) shall conform to EN 15266, or equivalent.
6.2.2 There shall be no joints or fittings in piping passing through engine compartments.
6.2.3 Metallic LPG supply piping routed through engine compartments shall be protected by conduit or
trunking, or supported by non-abrasive attachments which are no more than 300 mm apart.
6.2.4 Fittings for connections and joints in piping shall be metallic and of any of the following types:
— hard soldered and brazed connections;
— cutting ring fittings in accordance with ISO 8434-1:2007, Table 4 (see also 6.4.2, 6.4.4, 6.4.5);
— copper rin
...

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