1、 Reference number ISO 17484-2:2009(E) ISO 2009INTERNATIONAL STANDARD ISO 17484-2 First edition 2009-01-15 Plastics piping systems Multilayer pipe systems for indoor gas installations Part 2: Code of practice Systmes de canalisations en matires plastiques Tubes multicouches et leurs assemblages desti
2、ns lalimentation en gaz lintrieur des btiments Partie 2: Code de pratique ISO 17484-2:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded ar
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5、ating 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 ph
6、otocopying and microfilm, without permission in writing from either ISO at the address below or ISOs 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 copyrightiso.org Web www.iso.org Published in S
7、witzerland ii ISO 2009 All rights reservedISO 17484-2:2009(E) ISO 2009 All rights reserved iii 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 pipewor
8、k 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 recommendat
9、ions 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 17484-2:2009(E) iv I
10、SO 2009 All rights reservedForeword 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
11、 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 Comm
12、ission (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 technic
13、al 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 sha
14、ll 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
15、 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 17484-2:2009(E) ISO 2009 All rights reserved v Introduction ISO 17484 applies to multilayer pipe systems intende
16、d 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 withi
17、n 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 increas
18、ing. 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 i
19、n 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
20、 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 expl
21、icitly. However, it would be expected that national standards and laws will be changed in favour of the application of new installation techniques. INTERNATIONAL STANDARD ISO 17484-2:2009(E) ISO 2009 All rights reserved 1 Plastics piping systems Multilayer pipe systems for indoor gas installations P
22、art 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 bar
23、 1) . 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, ta
24、ke 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 docu
25、ment. 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
26、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
27、 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/mm 2= 10 5N/m 2 . ISO 17484-2:2009(E) 2 ISO 2009 All rights reserved4 Design 4.1 Reference to installation standards This part of ISO 17484 gives functional recommendation
28、s 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 const
29、ruction 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 selec
30、t 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 va
31、lves 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 t
32、o 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
33、 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
34、 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 tha
35、n 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
36、 of joints kept to a minimum. The use 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 17484-2:2009(E) ISO 2009 All rights reserved 3 The position of the pipework
37、 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 o
38、ther 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 pipewo
39、rk. 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 desig
40、ner 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
41、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 prot
42、ective 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 prot
43、ection 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, locati
44、on 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
45、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
46、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 17484-2:2009(E) 4 ISO 2009 All rights reserved7 Construction This part of ISO 17484 gives functional requirements for the construction of pipe
47、work. 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 de
48、trimental 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 y
49、et 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 equipo
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