BS ISO 17455-2007 Plastics piping systems - Multilayer pipes - Determination of the oxygen permeability of the barrier pipe《塑料管道系统 多层管 屏蔽管的透氧性测定》.pdf
《BS ISO 17455-2007 Plastics piping systems - Multilayer pipes - Determination of the oxygen permeability of the barrier pipe《塑料管道系统 多层管 屏蔽管的透氧性测定》.pdf》由会员分享,可在线阅读,更多相关《BS ISO 17455-2007 Plastics piping systems - Multilayer pipes - Determination of the oxygen permeability of the barrier pipe《塑料管道系统 多层管 屏蔽管的透氧性测定》.pdf(20页珍藏版)》请在麦多课文档分享上搜索。
1、BRITISH STANDARDBS ISO 17455:2005Plastics piping systems Multilayer pipes Determination of the oxygen permeability of the barrier pipeICS 23.040.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g
2、3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Incorporating corrigendum March 2007 National forewordThis British Standard is the UK implementation of ISO 17455:2005, incorporating corrigendum March 2007.The start and finish of text introduced or altered by corrigendum is indicated in the text by ta
3、gs. Text altered by ISO corrigendum March 2007 is indicated in the text by .The UK participation in its preparation was entrusted by Technical Committee PRI/88, Plastics piping systems, to Subcommittee PRI/88/4, Test methods.A list of organizations represented on this subcommittee can be obtained on
4、 request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.BS ISO 17455:2005This British Standard was published u
5、nder the authority of the Standards Policy and Strategy Committee on 29 June 2007 BSI 2010ISBN 978 0 580 65213 4Amendments/corrigenda issued since publicationDate Comments 31 May 2010 Implementation of ISO corrigendum March 2007Reference numberISO 17455:2005(E)INTERNATIONAL STANDARD ISO17455First ed
6、ition2005-10-01Plastics piping systems Multilayer pipes Determination of the oxygen permeability of the barrier pipe Systmes de canalisations en plastiques Tubes multicouches Dtermination de la permabilit loxygne de la couche barrire dun tube BS ISO 17455:2005ii iiiContents Page Foreword iv Introduc
7、tion v 1 Scope . 1 2 Principle. 1 3 Terms and definitions. 1 4 Symbols and abbreviated terms . 2 5 Apparatus 3 6 Test piece 4 7 Preconditioning. 4 8 Calibration of the test assembly . 4 9 Preparation for testing . 4 10 Measuring procedure . 5 11 Calculation of flux. 7 12 Test report . 8 A n n e x A
8、(informative) Oxygen solubility as a function of temperature . 9 Bibliography . 10 BS ISO 17455:2005iv 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 normal
9、ly 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
10、 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 I
11、nternational 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 o
12、f 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 17455 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 5, General
13、properties of pipes, fittings and valves of plastic materials and their accessories Test methods and basic specifications. BS ISO 17455:2005vIntroduction In response to the worldwide demand for specifications, requirements and test methods for multilayer pipes, WG 16 of ISO/TC 138/SC 5 was created a
14、t a meeting held in Kyoto, Japan, in 1998. The working group then started drafting three test standards (including ISO 17455) for multilayer pipes: ISO 17456, Plastics piping systems Multilayer pipes Determination of long-term strength; ISO 17454, Plastics piping systems Multilayer pipes Test method
15、 for the adhesion of the different layers by using a pulling rig. Only multilayer pipes are dealt with in this International Standard and for these purposes cross-linked polyethylene (PE-X) as well as adhesives are to be considered as a thermoplastics material. BS ISO 17455:2005blank1Plastics piping
16、 systems Multilayer pipes Determination of the oxygen permeability of the barrier pipe 1 Scope This International Standard specifies two test methods for determining the oxygen permeability of barrier pipe: the dynamic (Method I) and the static (Method II). In principle, both methods give the same r
17、esults. The method to be applied is not application-dependent, but can be specified in the referring standard. 2 Principle The principle is measurement of the oxygen transfer through the wall of the test piece under specified conditions. The oxygen increase is measured in a system of which the test
18、piece forms part. Oxygen can only be transported through the wall of the test piece. Therefore, the increased amount of oxygen in the closed system is the result of the functioning of the barrier layer of the test piece. NOTE A certain continuous oxygen permeation through the barrier layer is allowe
19、d. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 multilayer pipe pipe comprising layers of different materials 3.2 multilayer M pipe multilayer pipe comprising layers of polymers and one or more metal layers NOTE The wall thickness of the p
20、ipe consists of at least 60 % polymer layers. 3.3 multilayer P pipe multilayer pipe comprised of two or more polymer layers 3.4 inner layer layer in contact with the liquid or gas 3.5 outer layer layer exposed to the outer environment BS ISO 17455:20052 3.6 embedded layer layer between the outer and
21、 inner layer NOTE There can be more than one embedded layer. 3.7 barrier layer layer intended to prevent or greatly diminish oxygen transport from outside the pipe into the inside water NOTE For multilayer P pipes, the barrier layer is normally not stress-designed. 3.8 closed system system which com
22、prises stainless steel pipes, couplings and a tap, as well as the test piece, allowing only oxygen to permeate from the outside to the inside of the test piece 3.9 flux oxygen permeability of the barrier layer of the pipe 4 Symbols and abbreviated terms Abarroutside surface of the barrier layer, in
23、square metres (m2) Cox, toxygen concentration after time , in grams per cubic metre (g/m3) Foxflux expressed in oxygen transfer per unit per area (of the barrier layer),in grams per square metre per hour (g/m2 h) T test temperature (40C or 80C), expressed in degrees Centigrade Vappvolume of the clos
24、ed system, excluding the volume of the test piece, in cubic metres (m3) Vpipevolume of the test piece (pipe sample), in cubic metres (m3) dboutside diameter of the barrier layer, millimetres (mm) demanufacturers nominal outside diameter, expressed in millimetres (mm) diinside diameter of the test pi
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