ISO 138FDIS17484-2 2008

Prévia do material em texto

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 
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
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. 
 
 
Reference number
ISO/FDIS 17484-2:2008(E)
© ISO 2008
 
FINAL 
DRAFT 
ISO/TC 138/SC 4 
Secretariat: NEN 
Voting begins on: 
2008-10-06 
Voting terminates on: 
2008-12-06 
 
INTERNATIONAL 
STANDARD 
ISO/FDIS
17484-2
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 
 
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 copyright@iso.org 
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
 
 
ISO/FDIS 17484-2:2008(E) 
© ISO 2008 – All rights reserved iii
In accordance with the provisions of Council Resolution 15/1993, this document is circulated in the 
English language only. 
 
ISO/FDIS 17484-2:2008(E) 
iv © ISO 2008 – All rights reserved
 
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 
 
ISO/FDIS 17484-2:2008(E) 
© ISO 2008 – All rights reserved v
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 carriedout 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/FDIS 17484-2:2008(E) 
vi © ISO 2008 – All rights reserved
 
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. 
 
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 17484-2:2008(E)
 
© ISO 2008 – All rights reserved 1
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 
to and including 5 bar1). 
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. 
 
1) 1 bar = 0,1 MPa = 0,1 N/mm2 = 105 N/m2. 
ISO/FDIS 17484-2:2008(E) 
2 © ISO 2008 – All rights reserved
 
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). 
Where it is not possible to achieve adequate ventilation, other solutions shall be applied, e.g. ventilated 
sleeves, ducts, pipes or the filling of the space around the pipe with inert materials, etc. 
The route of the pipework shall be as short as practicable and the number of joints kept to a minimum. 
Theuse of diagonal routes should always be avoided. 
Where pipework is concealed, particular attention shall be given to the mode of construction and to corrosion 
protection of the pipework. 
ISO/FDIS 17484-2:2008(E) 
© ISO 2008 – All rights reserved 3
The position of the pipework in relation to other services shall be such that it can function properly and be 
used with safety. 
Pipework shall not be located near high voltage conductors or hot or chilled water systems, nor shall it be 
subjected to vibrations unless appropriate precautions are taken. 
NOTE Spaces reserved for other uses, such as lift shafts, garbage chutes, transformers, sewage pipes and bomb 
shelters, should be avoided unless specific precautions are taken. 
Where temperature change and building movements can lead to significant stresses on pipework, adequate 
provisions shall be made for moving the pipework. 
The effects of lightning shall be taken into consideration when designing the pipework. 
Where the distributed gas is wet or has a low vapour pressure, pipework shall be protected against frost 
and/or condensation and siphons shall be fitted at low points. 
5.2 Protection in case of fire 
The designer shall consider the possibility of an outbreak of fire at a building where gas pipework is in use, 
causing damage to the fabric of the building and, consequently or separately, to the gas pipework. 
The design objective shall be to minimize the likelihood of an explosion or serious aggravation of the fire. 
The design objective may be achieved, for example, by the use of one or more of the following: 
⎯ accessible manual means of isolation; 
⎯ automatic means of isolation; 
⎯ location of all or part of the pipework in an enclosure providing protection in the event of fire; 
⎯ coating pipework with a protective material to enable the pipework to withstand high temperatures for a 
given period of time. 
NOTE In the event of fire, even if rupture does not occur, the pipework shall be carefully inspected and tested. 
5.3 Additional safety devices 
Where required by risk assessment, specific additional protection shall be installed to protect against the 
consequence of failure of a component of the pipework. 
NOTE This may be a safety device (for example, one that protects against excessive temperatures or excess flow) or 
a passive protection measure (e.g. enclosure of the pipework). 
The number, location and sizing of excess flow device(s) shall be assessed and should be optimized during 
design to allow such a device to actuate when a failure of a pipework component occurs and to cope with the 
locally allowed pressure drop values. This process shall rely on accurate pressure drop values given by 
system/component manufacturers, e.g. in design specification recommendations. 
6 Materials and components 
The MOP for multilayer pipe gas systems is 5 bar (500 kPa). The system shall meet the requirements of 
ISO 17484-1. 
PE-X systems are suitable for the whole temperature range specified in ISO 17484-1, i.e. −20 °C to +60 °C. 
The manufacturer shall be consulted with respect to prolonged operation at temperatures above 40 °C and up 
to 60 °C, and below 0 °C. 
ISO/FDIS 17484-2:2008(E) 
4 © ISO 2008 – All rights reserved
 
7 Construction 
This part of ISO 17484 gives functional requirements for the construction of pipework. National standards shall 
be applied if available. 
Special attention shall be paid to the following. 
⎯ The assembly instructions of the manufacturer shall be followed. 
⎯ During the installation of the pipework, care shall be taken to prevent the ingress of foreign matter (e.g. 
dirt, water, other detrimental substances) into the pipes or fittings. 
⎯ The pipework shall be protected during installation. 
⎯ If it is foreseen that pipework may be damaged as a result of other construction work after installation, the 
pipework shall be protected adequately. 
EXAMPLE Open pipework on a floor that has not yet been embedded in concrete could be easily damaged by 
construction workers walking over the pipework. 
⎯ Only appropriate tools, accessories and procedures specific to a technique and approved by the pipe 
and/or fitting manufacturer shall be used to perform joints. 
⎯ Multilayer M-pipes shall be connected to the equipotential bonding system of the house. 
NOTE Some types of M-pipe systems are electrically earthed during installation of the fittings. For these 
systems, connection to the equipotential bonding system is not necessary. 
8 Jointing procedures 
8.1 General 
Multilayer and PEX pipes are generally delivered as a complete system. The pipes, fittings, tools, etc. would 
have been tested as a complete system. However, components are generally not compatible with systems of 
another brand. 
Installation operatives applying different systems should be aware of this lack of compatibility. 
Repair instructions are supplied by the manufacturer because of the lack of compatibility. 
The manufacturer shall provide a transition fitting intended to be connected to a standardized system, the 
connection complying with the relevant standards, e.g. ISO 7-1. 
NOTE Some countries require standardized dimensions (outside diameter and/or wall thickness). Standardization of 
dimensions at the international level is not yet available. 
Special attention should be paid to: 
⎯ assembly instructions given by the manufacturer; 
⎯ non-interchangeability of pipes and/or fittings of one system manufacturer with pipes and/or fittings of 
another system manufacturer, except where interchangeability is indicated by each of the system 
manufacturers; 
⎯ use of only those tools, accessories (e.g. jaws and collars) and procedures which are appropriate to the 
jointing system being applied by the installation operative; 
⎯ connection of multilayer M-pipes (which comprise at least one metallic layer, e.g. PEX-Al-PEX or PE-AL-
PE) to the equipotential bonding system of the building. 
ISO/FDIS 17484-2:2008(E) 
© ISO 2008 – All rights reserved 5
8.2 Installation process 
The installation process should take into account the manufacturer’s recommendations. 
9 Pressure testing and commissioning 
9.1 General recommendations 
Pipework shall be put into service only if the tests specified in Clause 9 have been successfully carried out. 
The tests shall be carried out on the whole pipework or on separate sections. 
Before testing, all pipework open ends shall be sealed. Any leaktight device used to seal the pipework shall be 
capable of withstanding the test pressure. 
In general, means of isolation in the closed position should not be assumed to be leaktight. 
Tests shall be conducted by the authorized person identified as being responsible for their execution. 
Test reporting shall entail the preparation of a test report by the authorized person. This report shall enable 
the section of the pipework concerned to be clearly identified. It should give in detail the date, the type of tests 
performed, the readings measured (duration, pressure, temperature, etc.) and the results obtained. 
In cases where the results of tests are negative, leaks shall be identified by appropriate means, for example 
use of an appropriate leak-detection fluid. The leak-detection fluid shall not adversely affect the material of the 
pipes and fittings. Defective parts shall be replaced or repaired. After elimination of leaks, the test shall be 
repeated until the results are positive. 
NOTE For components made of stainless steel, the level of chloride ions in the leak-detection fluid shall be below 
30 mg/l. 
9.2 Recommendations relating to the safety of persons and property during testing 
The test procedure shall not jeopardize the safety of persons and property. 
Before testing, the authorized person shall have full knowledgeof the pipework and shall verify the validity of 
information about the pipework. The authorized person shall ensure, or have certificates or documents 
attesting, that the pipework has been constructed in compliance with legal requirements and regulations in 
force and in accordance with the design specifications. 
Depending on the test pressure selected, the type of joint(s) used and the location of the pipework, the person 
authorized to carry out tests with a fluid under pressure shall judge whether it is necessary to first carry out 
non-destructive tests. 
The applied test pressure shall not exceed the pressure that the pipework is able to withstand. If necessary, 
appliances shall be disconnected or isolated. 
Any sudden increase in pressure within the pipework to be tested shall be avoided. 
9.3 Tightness testing 
All pipework shall be subjected to a tightness test. 
The applied tightness test pressure shall be at least equal to the operating pressure. 
ISO/FDIS 17484-2:2008(E) 
6 © ISO 2008 – All rights reserved
 
9.4 Test fluids 
The test fluid to be used shall be either air, inert gas (e.g. nitrogen) or the gas to be distributed, as follows: 
a) Use of inert gas 
When inert gas or air is used from a storage vessel under pressure, precautions shall be taken to ensure 
that the pressure inside the pipework does not exceed the specified test pressure; 
b) Utilization of the gas to be distributed 
Where the use of air or inert gas is not practicable, it may be acceptable to use the gas to be distributed 
as a test fluid for tightness tests carried out at operating pressure, provided that all joints are easily 
accessible. 
If the test is not immediately followed by commissioning of the pipework, the gas to be distributed shall be 
purged from the pipework and the pipework shall be sealed after purging. 
9.5 Test conditions 
Test fluid temperature and atmospheric pressure can affect strength testing and tightness testing because of 
their effects on measured pressures. Variation in these parameters shall be taken into account in the 
assessment of the results of the tests. 
9.6 Strength testing 
The strength test shall be carried out at high pressure to assure the integrity of a system. This test does not 
intend to determine the long-term strength of the pipework, but to detect installation faults, such as unpressed 
fittings or serious pipe damage. In practice, a strength test of approximately 1 h will be sufficient for the 
minimum pressures specified in Table 1. The minimum pressure for the strength test is given in Table 1. At 
higher test pressures the testing time could be reduced considerably, up to a minimum testing duration of 30 s. 
The strength test pressure (STP) is a function of the MOP, as shown in Table 1. 
Table 1 — Strength test pressure as a function of the maximum operating pressure 
MOP 
bar 
STP 
bar 
2 < MOP u 5 > 1,40 × MOP 
0,1 < MOP u 2 > 1,75 × MOP 
MOP u 0,1 W 2,5 × MOP 
 
The strength test may be performed simultaneously with the tightness test, using the same fluid at the same 
pressure level of the strength test. 
If the strength test is not combined with the tightness test, the strength test shall precede it. 
If the strength test is not combined with the tightness test, the duration of the strength test shall be to the time 
required to confirm, by appropriate means, that there has been no rupture in the pipework. 
All fittings integral with the pipework, such as regulators, meters, means of isolation, safety devices, etc., 
which are not capable of withstanding the pressure selected for the test, shall be removed prior to the test. 
The means of isolation shall be capable of passing this test. 
ISO/FDIS 17484-2:2008(E) 
© ISO 2008 – All rights reserved 7
In this case, either the fitting shall be replaced with a section of pipework, or parts of the pipework situated 
upstream and downstream of the removed component shall be sealed and tested separately. 
Appliances shall be disconnected before the strength test is performed. 
10 Storage and handling 
10.1 General 
Multilayer pipes are available as coiled pipe and in straight lengths (only the larger sizes, generally). Care 
shall be taken during the transport, handling and storage of pipes, fittings and other items to avoid damage. 
Care shall be taken to prevent the ingress of foreign matter (e.g. dirt, water and other detrimental substances) 
into the pipes or fittings. 
10.2 Storage 
Pipes and fittings shall be stored in such a way as to minimize the possibility of the material being damaged 
by crushing, piercing or exposure to direct sunlight. Contact with aggressive reagents or solvents shall be 
avoided. The manufacturer’s storage recommendations shall be followed. 
Fittings shall be stored in their original packaging until ready for use. 
Straight lengths of pipes stored shall be stacked on a reasonably flat surface, free from sharp objects, stones 
or projections likely to deform or damage these pipes. Stacking shall never be a cause of distortion of the pipe 
cross-section. 
NOTE Covering of the pipe to protect it against UV radiation can sometimes create excessive heat which can also be 
detrimental to the pipe performance. 
10.3 Handling 
Dragging of pipes or coils along rough surfaces shall be avoided. 
 
ISO/FDIS 17484-2:2008(E) 
8 © ISO 2008 – All rights reserved
 
Bibliography 
[1] ISO 7-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, 
tolerances and designation 
[2] ISO/TS 10839, Polyethylene pipes and fittings for the supply of gaseous fuels — Code of practice for 
design, handling and installation 
[3] EN 1775, Gas supply — Gas pipework for buildings — Maximum operating pressure less than or 
equal to 5 bar — Functional recommendations 
 
ISO/FDIS 17484-2:2008(E) 
ICS 23.040.20; 23.040.45; 91.140.40 
Price based on 8 pages 
© ISO 2008 – All rights reserved 
 
 
Report of voting on ISO/DIS 
FORM 13 (ISO) Page 2 of 2 
 REPORT OF VOTING ON ISO/DIS 17484-2 
 Closing date of voting 
2008-05-21 ISO/TC 138 /SC 4 
 
 
Secretariat 
Kiwa Gas 
Technology 
 
A report shall be returned to ISO/CS no later than 3 months after the closing date of voting on the DIS, whether or not 
comments have been reviewed and/or a new text has been prepared. 
 Preliminary report 
(submitted in those cases where comments are still to be considered and/or a decision has not yet been taken, or where it is decided 
that the nature of comments indicates a need for further consultation and/or reversion to a previous project development stage). To 
be followed by a 'Final report'. Any preliminary report is for ISO/CS for information, and is not circulated to member bodies) 
 Final report 
(submitted either immediately, when all comments have been reviewed and a decision can be taken, or following a 'Preliminary 
report'. The final report is circulated by ISO/CS to member bodies, and is distributed with any associated DIS or FDIS text) 
 
1 Result of the voting 
The above-mentioned document was circulated to member bodies with a request that the ISO Central Secretariat be 
informed whether or not member bodies were in favour of registration of the DIS as a Final Draft International Standard 
or for publication in the case of unanimous approval. 
The vote closed on the date indicated above. The replies listed in annex A have been received. 
2 
3 
Comments received 
Observations of the secretariat 
See annex B (if appropriate) 
4 Decision of the Chairman 
 Preliminary report (no annexes required) 
 The comments are under review and/or a decision on further procedure has not yet been taken 
 The project is to revert to the Preparatory Stage (a new working draft will bedeveloped) 
 The project is to revert to the Committee Stage (a new committee draft will be developed) 
 Final report 
 Having received 100% approval from the member bodies voting, the DIS is approved for direct publication 
without change other than editorial (no FDIS vote) 
(Option not applicable to projects progressing under the Vienna Agreement) 
 A revised text is to be submitted to ISO/CS for the approval procedure (FDIS vote) 
 A revised text is to be submitted to ISO/CS for a further enquiry (DIS) vote 
Remarks (e.g. observations on how comments were reviewed, date by which a decision is to be taken, date when a text is expected) 
 
Enclosures 
 Annex A ISO/TC138/SC4 doc. N1503 Result of voting ISO DIS 17484-2 
 Annex B ISO/TC138/SC4 doc. N1518 Decisions on comments on ISO DIS 17484-2 
Signature of the Secretary 
 J.B.W. Wikkerink 
Date 2008-07-28 
Signature of the Chairman 
 M. Wolters 
Date 2008-07-28 
 
 
 
 
FORM 13 (ISO) Page 1 of 1 
 
 
 
ISO/TC 138/SC 4 
Title: 
Plastics pipes and fittings for the supply of gaseous fuels 
Secretariat: 
Kiwa Gas Technology 
Attn. J.B.W. Wikkerink 
PO BOX 137 
7300 AC APELDOORN 
NETHERLANDS 
Tel: +31 55 5393445 
fax: +31 55 5393335 
e-mail: iso.tc138.sc4-secr@kiwa.nl 
 
 REQUESTED ACTION 
Circulated to P- and O-members, and to technical 
committees and organizations in liaison for: 
 information 
 
 
 comments by 
 [date] 
 voting (P-members only: ballot form attached) by 
 
 
P-members of the technical committee or subcommittee 
concerned have an obligation to vote. 
 
 
Title: Result of voting on ISO DIS 17484-2: Plastics piping systems -- Multilayer pipe systems for indoor gas installations 
-- Part 2: Code of practice 
Source: ISO/CS 
Project(s): 
Status: 
Additional information 
Date 
2008-05-26 
Reference number 
ISO/TC 138/SC 4 N 1503 
Supersedes document 
This document is still under study and subject to change. It 
should not be used for reference purposes. 
Ballot Information
Reference ISO/DIS 17484-2 Committee ISO/TC 138/SC 4
Edition number 1 Vienna agreement
English title Plastics piping systems -- Multilayer pipe systems for indoor gas installations -- Part 2: Code
of pratice
French title 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
Start date 2007-12-21 End date 2008-05-21
Opened by ISO/CS on 2007-12-21 00:00:25 Closed by ISO/CS on 2008-05-23 00:01:12
Status Closed
Voting stage Enquiry Version number 1
Vote in parallel with
Joint technical work
with
Committee interested
in technical work
Note
Result of voting
P-Members voting: 17 in favour out of 19 = 89 % (requirement >= 66.66%)
(P-Members having abstained are not counted in this vote.)
Member bodies voting: 2 negative votes out of 20 = 10 % (requirement <= 25%)
Approved
Votes by members
Country Member Status Approval Disapproval Abstention
Australia SA P-Member X
Austria ON P-Member X *
Belgium NBN P-Member X
Canada SCC P-Member X
China SAC P-Member X
Colombia ICONTEC P-Member X
Czech Republic CNI P-Member X
Denmark DS P-Member X
Finland SFS P-Member X
France AFNOR P-Member X *
Germany DIN P-Member X *
Hungary MSZT P-Member X
Ireland NSAI O-Member X
Israel SII P-Member X
Italy UNI P-Member X
Japan JISC P-Member X
Kenya KEBS P-Member X
Korea, Republic of KATS P-Member X
Malaysia DSM P-Member X
Netherlands NEN Secretariat X
Poland PKN P-Member X
Russian Federation GOST R X
South Africa SABS P-Member X
Spain AENOR P-Member X
Sweden SIS P-Member X
Switzerland SNV P-Member X
United Kingdom BSI P-Member X *
USA ANSI P-Member
P-Member TOTALS
Total of P-Members voting: 19
17 2 6
TOTALS 18 2 7
(*) A comment file was submitted with this vote
Comments from Voters
Austria ON P-Member Austria(ON).doc
France AFNOR P-Member France(AFNOR).doc
Germany DIN P-Member Germany(DIN).doc
United Kingdom BSI P-Member UnitedKingdom(BSI).doc
Comments from Commenters
ISO ISO.doc
 Page 1 of 4 
 
 
 
ISO/TC 138/SC 4 
Title: 
Plastics pipes and fittings for the supply of gaseous fuels 
Secretariat: 
Kiwa Gas Technology 
Attn. J.B.W. Wikkerink 
PO BOX 137 
7300 AC APELDOORN 
NETHERLANDS 
Tel: +31 55 5393445 
fax: +31 55 5393335 
e-mail: iso.tc138.sc4-secr@kiwa.nl 
 
 REQUESTED ACTION 
Circulated to P- and O-members, and to technical 
committees and organizations in liaison for: 
 information 
 
 
 comments by 
 [date] 
 voting (P-members only: ballot form attached) by 
 
 
P-members of the technical committee or subcommittee 
concerned have an obligation to vote. 
 
 
Title: Decisions on comments on ISO DIS 17484-2: : Plastics piping systems -- Multilayer pipe systems for indoor gas 
installations -- Part 2: Code of practice 
Source: ISO TC138 SC4 Secretariat 
Project(s): 
Status: 
Additional information 
Date 
2008-07-28 
Reference number 
ISO/TC 138/SC 4 N 1518 
Supersedes document 
This document is still under study and subject to change. It 
should not be used for reference purposes. 
Template for comments and secretariat observations Date:2008-07-28 Document: ISO_DIS_17484-2 N1518 
 
1 2 (3) 4 5 (6) (7) 
MB1 Clause No./ 
Subclause 
No./ 
Annex 
(e.g. 3.1) 
Paragraph/ 
Figure/ 
Table/ 
Note 
(e.g. Table 1) 
Type 
of 
comm
ent2 
Comment (justification for change) by the MB Proposed change by the MB Secretariat observations 
on each comment submitted 
 
1 MB = Member body (enter the ISO 3166 two-letter country code, e.g. FR for France; comments from the CMC editing unit are identified by ***) 
2 Type of comment: ge = general te = technical ed = editorial 
NOTE Columns 1, 2, 4, 5 are compulsory. 
CEN electronic balloting commenting template/version 2001-10 
Page 2 of 4 
DE ge Germany disagrees for the following reasons 
DE ge 1) ISO 17484-2 is a standard on a very low quality level. 
Worldwide we have several principles and levels of 
security. The differences in the security level in the 
countries is very distinctive. For that reason it makes no 
sense to establish Standards with low level rules. For gas 
installations inside buildings, the individual national 
requirements should remain valid. 
 
2) Concerning gas installations inside buildings, the 
differences between especially the European 
countries (in respect of the national laws and security 
philosophies) are huge. A International 
standardization project is only acceptable if all the 
national rules shall be taken into account. For a 
project with the goal of harmonization of these 
requirements, in our opinion the differences are too 
manifold. 
 See 4.1 references to national 
installation guidelines have 
been made 
FR Ge 
 
Multilayer pipes are not allowed in France for indoor 
installations and there is no expertise on that subject. 
 To be noted 
AT entire draft ge Plastics pipes for indoor gas installations are not in use in 
Austria due to certain safety aspects. Therefore it does not 
make sense to "accept" the contents of the document with 
an abstention. 
 To be noted 
** Title 2nd element Restore "with a maximum operating pressure up to 
and including 5 bar (500 kPa)". Delete "5 bar" when 
ISO 17848-1 comes up for revision 
We have to follow the policy of 
ISO TC 138 SC 4 
** 1 and 
throughout 
para 1 ed "this International Standard", "the present International 
Standard" 
Change to "this part of ISO 17484" or "ISO 17484 
(all parts)" as appropriate 
Accepted 
** 3 ed Some definitions, e.g. 3.1.1, 3.1.2, 3.1.3, are repeated fromISO 17484-1 
Delete these definitions, inserting the introductory 
phrase, "For the purposes of this document, the 
terms and definitions given in ISO 17484-1 and the 
Accepted 
Template for comments and secretariat observations Date:2008-07-28 Document: ISO_DIS_17484-2 N1518 
 
1 2 (3) 4 5 (6) (7) 
MB1 Clause No./ 
Subclause 
No./ 
Annex 
(e.g. 3.1) 
Paragraph/ 
Figure/ 
Table/ 
Note 
(e.g. Table 1) 
Type 
of 
comm
ent2 
Comment (justification for change) by the MB Proposed change by the MB Secretariat observations 
on each comment submitted 
 
1 MB = Member body (enter the ISO 3166 two-letter country code, e.g. FR for France; comments from the CMC editing unit are identified by ***) 
2 Type of comment: ge = general te = technical ed = editorial 
NOTE Columns 1, 2, 4, 5 are compulsory. 
CEN electronic balloting commenting template/version 2001-10 
Page 3 of 4 
following apply." 
** 3 ed If terms have been defined elsewhere in other 
contexts, the definitions should be preceded by 
"‹plastics piping systems›" in "elbow" brackets (see 
Directives, Part 2, Annex D), if they cannot be 
borrowed for use in ISO 17484-2 
Will be checked 
Only the definition on 
equipotential bondi remains 
** 3.2.1 and 
throughout 
 ed "1 bar" The SI unit for pressure used in International 
Standards is the pascal. Delete "1 bar", insert "0,1 
MPa" (see ISO 80000-4, 15.1); alternatively, note 
the "bar" equivalent in a footnote 
We have to follow the policy of 
ISO TC 138 SC 4 
GB 4.1 1st sentence Ed The standard is applicable to ‘within buildings’ rather than 
just houses. 
Change to: ‘This standard gives functional 
recommendations for the design of gas pipework 
within buildings.’ 
Accepted 
** 4.2 and 
throughout 
 ed "sulphide" Change to "sulfide" (IUPAC rule) Accepted 
GB 5.2 Te In the event of fire, even if rupture of the pipework does 
not occur there is the probability of damage that might 
compromise future integrity of the system. Should it be 
stated that in the event of fire the system should be 
carefully inspected and tested if it is intended to put all or 
part of the system back into service? 
Consider. The scope of this practice has 
been restricted to new build 
systems. Although the 
information could be useful it 
does not belong to this code 
of practice but might be 
incorporated in a part on 
maintenance and repair. 
Anyway metallic systems 
shall be also checked after 
fire. 
 
Proposal: To incorporate a 
note on this subject. 
 
 
 
GB 6 Para 2 Te It is stated that PE-X is suitable for the whole temperature 
range. It is preferable to state this. 
Suggested wording: 
‘PE-X systems are suitable for the whole 
Accepted 
Template for comments and secretariat observations Date:2008-07-28 Document: ISO_DIS_17484-2 N1518 
 
1 2 (3) 4 5 (6) (7) 
MB1 Clause No./ 
Subclause 
No./ 
Annex 
(e.g. 3.1) 
Paragraph/ 
Figure/ 
Table/ 
Note 
(e.g. Table 1) 
Type 
of 
comm
ent2 
Comment (justification for change) by the MB Proposed change by the MB Secretariat observations 
on each comment submitted 
 
1 MB = Member body (enter the ISO 3166 two-letter country code, e.g. FR for France; comments from the CMC editing unit are identified by ***) 
2 Type of comment: ge = general te = technical ed = editorial 
NOTE Columns 1, 2, 4, 5 are compulsory. 
CEN electronic balloting commenting template/version 2001-10 
Page 4 of 4 
temperature range specified in ISO 17484-1, ie -
20 °C to + 60 °C.’ 
** 6 and 
throughout 
 ed "part 1 of this standard" Change to "ISO 17484-1" Accepted 
** 7 and 
throughout 
 ed "this standard" Change to "this part of ISO 17484" or "ISO 17484 
(all parts)" as appropriate 
Accepted 
** 9.1 Note ed "Cl−" "chloride" or "chloride ion" more readily 
comprehensible to a non-chemical readership? 
Accepted 
GB 9.1 Last para Te It should be stated that the use of leak detection fluid shall 
not adversely the material of the pipes and fittings. 
Add ‘shall not adversely the material of the pipes 
and fittings’ after ‘leak detection fluid’. 
Accepted 
GB 9.6 5th para Te It is advisable to specify a time limit for applying this 
strength test. 
Consider specifying a time limit, 1 h is suggested. 1 h is reasonable. Accepted 
GB 9.6 6th para Te It is stated that all fittings etc not capable of withstanding 
the test pressure should be removed prior to the test. 
However, the means of isolation must be capable of 
passing this test. Modify wording to reflect this. 
Consider. Accepted