ISO 17484-2:2009

Plastics piping systems — Multilayer pipe systems for indoor gas installations — Part 2: Code of pratice

ISO 17484-2:2009 specifies the recommended practice for the installation of multilayer pipe systems in accordance with ISO 17484-1:2006. It is applicable to piping systems used in buildings to supply gas with a maximum operating pressure up to and including 500 kPa (5 bar).

Systèmes de canalisations en matières plastiques — Tubes multicouches et leurs assemblages destinés à l'alimentation en gaz à l'intérieur des bâtiments — Partie 2: Code de pratique

General Information

• Status: Published
• Publication Date: 04-Jan-2009
• ICS: 23.040.20 - Plastics pipes
• ICS: 23.040.45 - Plastics fittings
• ICS: 91.140.40 - Gas supply systems
• Technical Committee: ISO/TC 138/SC 4 - Plastics pipes and fittings for the supply of gaseous fuels
• Drafting Committee: ISO/TC 138/SC 4 - Plastics pipes and fittings for the supply of gaseous fuels
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 17-Oct-2019

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 17484-2
First edition
2009-01-15


Plastics piping systems — Multilayer pipe
systems for indoor gas installations —
Part 2:
Code of practice
Systèmes de canalisations en matières plastiques — Tubes
multicouches et leurs assemblages destinés à l'alimentation en gaz à
l'intérieur des bâtiments —
Partie 2: Code de pratique





Reference number
ISO 17484-2:2009(E)
©
ISO 2009

---------------------- Page: 1 ----------------------
ISO 17484-2:2009(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.


COPYRIGHT PROTECTED DOCUMENT


©  ISO 2009
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing 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 [e-mail]
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Published in Switzerland

ii © ISO 2009 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 17484-2:2009(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope. 1
2 Normative references. 1
3 Terms and definitions. 1
4 Design. 2
4.1 Reference to installation standards. 2
4.2 Pipework components. 2
5 Location of pipework. 2
5.1 General requirements for location of pipework. 2
5.2 Protection in case of fire. 3
5.3 Additional safety devices. 3
6 Materials and components . 3
7 Construction. 4
8 Jointing procedures . 4
8.1 General. 4
8.2 Installation process . 5
9 Pressure testing and commissioning. 5
9.1 General recommendations. 5
9.2 Recommendations relating to the safety of persons and property during testing . 5
9.3 Tightness testing. 5
9.4 Test fluids . 6
9.5 Test conditions . 6
9.6 Strength testing . 6
10 Storage and handling . 7
10.1 General. 7
10.2 Storage. 7
10.3 Handling. 7
Bibliography . 8

© ISO 2009 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO 17484-2:2009(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 17484-2 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the
transport of fluids, Subcommittee SC 4, Plastics pipes and fittings for the supply of gaseous fuels.
ISO 17484 consists of the following parts, under the general title Plastics piping systems — Multilayer pipe
systems for indoor gas installations:
⎯ Part 1: Specifications for systems
⎯ Part 2: Code of practice
iv © ISO 2009 – All rights reserved

---------------------- Page: 4 ----------------------
ISO 17484-2:2009(E)
Introduction
ISO 17484 applies to multilayer pipe systems intended to be installed inside buildings.
The scope of this part of ISO 17484 has been limited to a maximum operating pressure (MOP) of 5 bar
(500 kPa).
Although these materials are able to withstand higher pressures, a lower maximum working pressure has
been selected taking into account use for gas within buildings. Therefore, a rather high safety factor has been
incorporated into the functional requirements. Currently, in some countries multilayer piping is installed only
under specific conditions, but this is not the case everywhere. Generally, interest in multilayer pipe systems
has been increasing. Cost-effective material installation cost is a good argument for the reconsideration of
conventional installation techniques. Compared with traditional materials and installation techniques,
multilayer systems offer ease of installation and are more cost-effective.
The working pressure of gas in buildings for domestic or commercial use is usually not more than 100 mbar
(10 kPa). Only in very rare cases is a higher working pressure applied.
When higher pressures are applied, it is very important to take into account national regulations for the fitting
of (industrial) gas installations.
It is likely that new pipe constructions or materials like multilayer pipe and PEX systems will be accepted in
more countries in the coming years. At present, in the majority of countries only steel and copper pipework are
permitted for gas supply within buildings, other materials being forbidden explicitly. However, it would be
expected that national standards and laws will be changed in favour of the application of new installation
techniques.

© ISO 2009 – All rights reserved v

---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 17484-2:2009(E)

Plastics piping systems — Multilayer pipe systems for indoor
gas installations —
Part 2:
Code of practice
1 Scope
This part of ISO 17484 specifies the recommended practice for the installation of multilayer pipe systems in
accordance with ISO 17484-1.
It is applicable to pipe systems used in buildings to supply gas with a maximum operating pressure (MOP) up
1)
to and including 5 bar .
This part of ISO 17484 specifies common basic principles for indoor gas systems. Users of this part of
ISO 17484 should be aware that more detailed national standards and/or codes of practice can exist in ISO
member countries. These existing regulations, as well as new national regulations, take precedence over this
part of ISO 17484. It is intended to be applied in association with these national standards and/or codes of
practice setting out the above-mentioned basic principles.
2 Normative references
The following referenced documents are indispensable for the application 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.
ISO 17484-1, Plastics piping systems — Multilayer pipe systems for indoor gas installations with a maximum
operating pressure up to and including 5 bar (500 kPa) — Part 1: Specifications for systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 17484-1 and the following apply.
3.1
equipotential bond
means of ensuring that metallic gas pipework and other metallic parts of the building are at the same potential
NOTE For safety reasons, this equipotential bonding is connected to earth.

2 5 2
1) 1 bar = 0,1 MPa = 0,1 N/mm = 10 N/m .
© ISO 2009 – All rights reserved 1

---------------------- Page: 6 ----------------------
ISO 17484-2:2009(E)
4 Design
4.1 Reference to installation standards
This part of ISO 17484 gives functional recommendations for the design of gas pipework within buildings. In
addition to this part of ISO 17484, more detailed national standards shall be applied.
NOTE 1 Installation techniques differ from country to country. These different techniques are often based on
“installation tradition”, differences in the construction of buildings, differences in climatic conditions, etc. For these reasons
it is difficult to produce a general standard for installation. This is also why EN 1775 gives only functional
recommendations. In many cases EN 1775 offers more than one solution. Each national standards body may select the
most appropriate possibility that could be described in a more detailed way in a national standard.
National restrictions relative to the MOP shall be taken into account.
NOTE 2 Additional safety devices are required by some national standards bodies, for example excess flow valves,
thermal valves or overpressure valves.
4.2 Pipework components
The pipework components shall be appropriate for:
⎯ the types of gases being distributed;
NOTE Particular attention should be given to the content of hydrogen sulfide, and to water content, dust content
and water/hydrocarbon dew point with respect to materials, drainage of low points and filtration.
⎯ the pipework design pressure;
⎯ the location of the pipework;
⎯ the pipework temperature under normal operating conditions.
5 Location of pipework
5.1 General requirements for location of pipework
The location of the pipework shall minimize the risk of damage caused by, for example mechanical impact, UV
exposure, accelerated corrosion, chemical attack, extreme temperatures and lightning, or else additional
safety measures shall be applied.
The route and location of pipework built within the internal structure shall be such that third party damage is
minimized and that any building movement does not lead to failure.
The route of pipework in buildings should be located in ventilated spaces.
Ventilation shall be adequate to safely dilute any small gas leak taking due account of the density of the gas
(heavier than air, e.g. LPG, or lighter than air, e.g. natural gas
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 17484-2
ISO/TC 138/SC 4
Plastics piping systems — Multilayer pipe
Secretariat: NEN
systems for indoor gas installations —
Voting begins on:
2008-10-06
Part 2:
Code of practice
Voting terminates on:
2008-12-06
Systèmes de canalisations en matières plastiques — Tubes

multicouches et leurs assemblages destinés à l'alimentation en gaz à
l'intérieur des bâtiments —
Partie 2: Code de pratique


Please see the administrative notes on page iii

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 SUPPORT-
ING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 17484-2:2008(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
©
NATIONAL REGULATIONS. ISO 2008

---------------------- Page: 1 ----------------------
ISO/FDIS 17484-2:2008(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.


Copyright notice
This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted
under the applicable laws of the user's country, neither this ISO draft nor any extract from it may be
reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic,
photocopying, recording or otherwise, without prior written permission being secured.
Requests for permission to reproduce should be addressed to 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 [e-mail]
Web www.iso.org
Reproduction may be subject to royalty payments or a licensing agreement.
Violators may be prosecuted.

ii © ISO 2008 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/FDIS 17484-2:2008(E)
In accordance with the provisions of Council Resolution 15/1993, this document is circulated in the
English language only.

© ISO 2008 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO/FDIS 17484-2:2008(E)
Contents Page
Foreword. v
Introduction . vi
1 Scope. 1
2 Normative references. 1
3 Terms and definitions. 1
4 Design. 2
4.1 Reference to installation standards . 2
4.2 Pipework components. 2
5 Location of pipework . 2
5.1 General requirements for location of pipework. 2
5.2 Protection in case of fire . 3
5.3 Additional safety devices . 3
6 Materials and components. 3
7 Construction. 4
8 Jointing procedures. 4
8.1 General. 4
8.2 Installation process . 5
9 Pressure testing and commissioning . 5
9.1 General recommendations. 5
9.2 Recommendations relating to the safety of persons and property during testing. 5
9.3 Tightness testing. 5
9.4 Test fluids . 6
9.5 Test conditions. 6
9.6 Strength testing. 6
10 Storage and handling . 7
10.1 General. 7
10.2 Storage. 7
10.3 Handling. 7
Bibliography . 8

iv © ISO 2008 – All rights reserved

---------------------- Page: 4 ----------------------
ISO/FDIS 17484-2:2008(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 17484-2 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the
transport of fluids, Subcommittee SC 4, Plastics pipes and fittings for the supply of gaseous fuels.
ISO 17484 consists of the following parts, under the general title Plastics piping systems — Multilayer pipe
systems for indoor gas installations:
⎯ Part 1: Specifications for systems
⎯ Part 2: Code of practice
© ISO 2008 – All rights reserved v

---------------------- Page: 5 ----------------------
ISO/FDIS 17484-2:2008(E)
Introduction
ISO 17484 applies to multilayer pipe systems intended to be installed inside buildings.
The scope of this part of ISO 17484 has been limited to a maximum operating pressure (MOP) of 5 bar
(500 kPa).
Although these materials are able to withstand higher pressures, a lower maximum working pressure has
been selected taking into account use for gas within buildings. Therefore, a rather high safety factor has been
incorporated into the functional requirements. Currently, in some countries multilayer piping is installed only
under specific conditions, but this is not the case everywhere. Generally, interest in multilayer pipe systems
has been increasing. Cost-effective material installation cost is a good argument for the reconsideration of
conventional installation techniques. Compared with traditional materials and installation techniques,
multilayer systems offer ease of installation and are more cost-effective.
The working pressure of gas in buildings for domestic or commercial use is usually not more than 100 mbar
(10 kPa). Only in very rare cases is a higher working pressure applied.
When higher pressures are applied, it is very important to take into account national regulations for the fitting
of (industrial) gas installations.
It is likely that new pipe constructions or materials like multilayer pipe and PEX systems will be accepted in
more countries in the coming years. At present, in the majority of countries only steel and copper pipework are
permitted for gas supply within buildings, other materials being forbidden explicitly. However, it would be
expected that national standards and laws will be changed in favour of the application of new installation
techniques.

vi © ISO 2008 – All rights reserved

---------------------- Page: 6 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 17484-2:2008(E)

Plastics piping systems — Multilayer pipe systems for indoor
gas installations —
Part 2:
Code of practice
1 Scope
This part of ISO 17484 specifies the recommended practice for the installation of multilayer pipe systems in
accordance with ISO 17484-1.
It is applicable to pipe systems used in buildings to supply gas with a maximum operating pressure (MOP) up
1)
to and including 5 bar .
This part of ISO 17484 specifies common basic principles for indoor gas systems. Users of this part of
ISO 17484 should be aware that more detailed national standards and/or codes of practice can exist in ISO
member countries. These existing regulations, as well as new national regulations, take precedence over this
part of ISO 17484. It is intended to be applied in association with these national standards and/or codes of
practice setting out the above-mentioned basic principles.
2 Normative references
The following referenced documents are indispensable for the application 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.
ISO 17484-1, Plastics piping systems — Multilayer pipe systems for indoor gas installations with a maximum
operating pressure up to and including 5 bar (500 kPa) — Part 1: Specifications for systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 17484-1 and the following apply.
3.1
equipotential bond
means of ensuring that metallic gas pipework and other metallic parts of the building are at the same potential
NOTE For safety reasons, this equipotential bonding is connected to earth.

2 5 2
1) 1 bar = 0,1 MPa = 0,1 N/mm = 10 N/m .
© ISO 2008 – All rights reserved 1

---------------------- Page: 7 ----------------------
ISO/FDIS 17484-2:2008(E)
4 Design
4.1 Reference to installation standards
This part of ISO 17484 gives functional recommendations for the design of gas pipework within buildings. In
addition to this part of ISO 17484, more detailed national standards shall be applied.
NOTE 1 Installation techniques differ from country to country. These different techniques are often based on
“installation tradition”, differences in the construction of buildings, differences in climatic conditions, etc. For these reasons
it is difficult to produce a general standard for installation. This is also why EN 1775 gives only functional
recommendations. In many cases EN 1775 offers more than one solution. Each national standards body may select the
most appropriate possibility that could be described in a more detailed way in a national standard.
National restrictions relative to the MOP shall be taken into account.
NOTE 2 Additional safety devices are required by some national standards bodies, for example excess flow valves,
thermal valves or overpressure valves.
4.2 Pipework components
The pipework components shall be appropriate for:
⎯ the types of gases being distributed;
NOTE Particular attention should be given to the content of hydrogen sulfide, and to water content, dust content
and water/hydrocarbon dew point with respect to materials, drainage of low points and filtration.
⎯ the pipework design pressure;
⎯ the location of the pipework;
⎯ the pipework temperature under normal operating conditions.
5 Location of pipework
5.1 General requirements for location of pipework
The location of the pipework shall minimize the risk of damage caused by, for example mechanical impact, UV
...