ISO TR 18124-2006 Plastics piping systems - Multilayer M (metal) pipes - Test method for strength of the weld line in the metal layer and bonding between layers.pdf

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1、 Reference number ISO/TR 18124:2006(E) ISO 2006TECHNICAL REPORT ISO/TR 18124 First edition 2006-11-15 Plastics piping systems Multilayer M (metal) pipes Test method for strength of the weld line in the metal layer and bonding between layers by use of a cone Systmes de tuyauteries en plastiques Tubes

2、 M (mtal) multi-couches Mthode dessai de la rsistance de la ligne de soudure et du collage entre les couches en utilisant un cone ISO/TR 18124:2006(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

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5、O member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2006 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic

6、 or mechanical, including photocopying 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 We

7、b www.iso.org Published in Switzerland ii ISO 2006 All rights reservedISO/TR 18124:2006(E) ISO 2006 All rights reserved iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Internationa

8、l 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,

9、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 commi

10、ttees 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. In exceptional circumstances

11、, when a technical committee has collected data of a different kind from that which is normally published as an International Standard (“state of the art”, for example), it may decide by a simple majority vote of its participating members to publish a Technical Report. A Technical Report is entirely

12、 informative in nature and does not have to be reviewed until the data it provides are considered to be no longer valid or useful. 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 a

13、ny or all such patent rights. ISO/TR 18124 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 5, General properties of pipes, fittings and valves of plastic materials and their accessories Test methods and basic specificat

14、ions. ISO/TR 18124:2006(E) iv ISO 2006 All rights reservedIntroduction This Technical Report is one of several documents developed by ISO/TC 138/SC 5, following the creation of the Subcommittees Working Group WG 16 at Kyoto, Japan, in 1998, in response to worldwide demand for specifications, require

15、ments and test methods for multilayer plastics pipes. The other documents include ISO 17454 1 , ISO 17455 2and ISO 17456 3 . Initially, it was intended also to publish this Technical Report, together with ISO 17453, as International Standards. The Working Group then proposed the cancellation of both

16、 these projects, for the following reasons: because of the great variety of multilayer pipes, no identical forces for different types of multilayer M pipes can be created using the test principle; the realised force is very dependent on the tolerances of the pipe because of the great variation of to

17、lerances (even for the same product), it is extremely difficult to realise the same expansion for different types of multilayer M pipe; while the test method can very well be used as a product verification test during production, to give an indication of the quality of the multilayer M pipe product,

18、 International Standards are not intended for the setting up of such tests. ISO/TC 138/SC 5 acknowledged the difficulty of standardization in this area owing to the different thicknesses of the inside layer of various types of multilayer pipes and the fact that the test force is strongly dependent o

19、n pipe dimensions and therefore on tolerances, which also vary strongly. Nevertheless, in order not to lose the acquired information, the Subcommittee decided at its 2004 plenary meeting to combine the two committee drafts, ISO/CD 18124 and ISO/CD 17453, into a single Technical Report, ISO/TR 18124.

20、 Only multilayer pipes are dealt with in this Technical Report and for its purposes cross-linked polyethylene (PE-X) as well as adhesives are to be considered as a thermoplastics material. TECHNICAL REPORT ISO/TR 18124:2006(E) ISO 2006 All rights reserved 1 Plastics piping systems Multilayer M (meta

21、l) pipes Test method for strength of the weld line in the metal layer and bonding between layers by use of a cone 1 Scope This Technical Report specifies a method for testing the strength of the weld line in the metal layer and the adhesion between the different layers of multilayer M pipes by the u

22、se of a cone. NOTE 1 Acceptance of any inner layer made from a specific grade of material is subject to the relevant product standard or system standard and the requirements detailed in that standard. NOTE 2 The test can be used as a product verification test during production to give an indication

23、of the quality of the multilayer M pipe product. 2 Principle A test piece of specified length, cut from a multilayer M pipe, is subjected to a radial expansion by inserting a cone to verify the strength of the weld line of the metal layer and to assess the bond between the different layers. By visua

24、l inspection after withdrawal of the cone, the weld line is inspected for any damage and the test piece for any delamination. NOTE 1 Acceptance of any inner layer (see definitions) made from a specific grade of material is subject to the relevant product standard or system standard and the requireme

25、nts detailed in that standard. NOTE 2 It is assumed that the following test parameters are set by the referring standard or the manufacturers instructions: a) for the preparation of the cone, 1) the dimension d iof the cone of the test piece, see Figure 1, and 2) the dimension d fof the cone, see Fi

26、gure 1 and 5.1; b) number of test pieces, see 6.2; c) preconditioning requirements and test temperature, see Clause 7. ISO/TR 18124:2006(E) 2 ISO 2006 All rights reserved3 Terms, definitions and symbols For the purpose of this document, the following terms, definitions and symbols apply. 3.1 multila

27、yer pipe pipe comprising layers of different materials 3.2 multilayer M pipe pipe comprising layers of polymers and one or more metal layers NOTE The wall thickness of the pipe consists of at least 60 % of polymeric materials (e.g. PE-X/Al/PEX or PE-RT/Al/PE-X). 3.3 inner layer layer in contact with

28、 the conveyed fluid (liquid or gas) 3.4 outer layer layer exposed to the outer environment 3.5 embedded layer(s) layer(s) between the outer and inner layer 4 Symbols d ispecified inside diameter of the (pipe) test piece d i,actmeasured (actual) inside diameter of the (pipe) test piece d especified o

29、utside diameter of the (pipe) test piece d e,actmeasured (actual) outside diameter of the (pipe) test piece d fnominal internal diameter of the test piece after diameter increase for the welding line test (see 5.2) l length of the test piece e nnominal wall thickness ISO/TR 18124:2006(E) ISO 2006 Al

30、l rights reserved 3 5 Apparatus 5.1 Testing machine, consisting of a clamping devices to hold the test piece, a cone and presspull device. 5.2 Cone, as shown in Figure 1, whose principal design shall take the following into account: the lead in angle, , shall be 7,5; d fshall be equal to the maximum

31、 tolerable value, taking into account the manufacturers pipe tolerances, or, unless otherwise specified, shall be at least 1,1 d i ; different tolerance fields. Dimensions in millimetres Figure 1 Cone dimensions 5.3 Clamping devices, capable of holding the test piece and cone in radial and angular a

32、lignment during the test. 5.4 Presspull device, capable of inserting, pressing and pulling the cone centre-lined into the test piece at a specified constant speed. 5.5 If applied forces are requested see Clause 9, j), force measuring device, capable of measuring the applied force required to insert

33、the cone in the test piece at the specified constant speed, as well as the applied force required to withdraw the cone from the test piece. 6 Test pieces 6.1 Preparation The test piece shall have a free length of 4d e , with a minimum of 50 mm. Test pieces shall be prepared in accordance with the ma

34、nufacturers instructions, taking into account the minimum free length. 6.2 Number of test pieces Unless otherwise specified in the referring standard or specification, three test pieces shall be prepared and tested. ISO/TR 18124:2006(E) 4 ISO 2006 All rights reservedNOTE An additional test piece or

35、pieces can be necessary in the event of slippage during insertion of the cone in the test piece. 7 Preconditioning and test temperature 7.1 Preconditioning shall conform to the referring standard or specification. 7.2 Unless otherwise specified by the referring standard or specification, the test te

36、mperature shall be (23 2) C. 8 Procedure 8.1 Measure and record the dimensions d i,m , d e,m , e nand the length l of the test piece. 8.2 Prior to testing, condition the test piece in accordance with the referring standard or specification. 8.3 Clamp the test piece in the clamping device uniformly a

37、nd sufficiently tightly to prevent any slipping of the test piece. 8.4 Ensure that both the cone and the (pipe) test piece are radial and angularly aligned, and carefully insert the cone into the test piece until it touches the test piece, slightly. 8.5 Ensure that the testing temperature is in acco

38、rdance with 7.2. 8.6 When necessary, add lubricant inside the test piece and/or on the cone to avoid any force occurring from roughness of the inner layer surface and/or the cone. 8.7 Using the presspull device, press the cone with a speed of (50 5) mm/min into the test piece until the insertion lim

39、it is reached and, if requested, measure during insertion the applied force and record the maximum applied force. 8.8 In the event of any slipping of the test piece or the cone during insertion of the cone, stop and repeat the test with a fresh test piece. 8.9 Withdraw the cone (15 1) min after the

40、insertion limit is reached and, if requested, measure during withdrawal the applied force and record the maximum applied force. 8.10 Remove the test piece from the clamping device. 8.11 Measure and record the internal diameter of the test piece at the mouth of the test piece on the side of the d fzo

41、ne. 8.12 Inspect the test piece visually and record any visible damage on the weld line or any place of the metal section. NOTE 1 Visual inspection can take place at the mouth of the test piece on the side of the d fpart (without cutting the test piece). NOTE 2 For a complete visual inspection, it i

42、s advisable to remove the adjacent layers over a length of d i(where expansion of d fhas taken place) to expose the welded layer, and inspect the test piece visually for any damage on the weld line or any place of the metal section. NOTE 3 For visual inspection, additional sectioning in the d fsecti

43、on of the test piece, to determine whether the bond between the layers has been destroyed, can be required. ISO/TR 18124:2006(E) ISO 2006 All rights reserved 5 9 Test report The test report shall include the following information: a) reference to this Technical Report and the referring standard or s

44、pecification and the manufacturers information; b) complete identification of the multilayer pipe component from which the test piece was taken, including manufacturer, material type, code number, size, source and significant history, if any; c) the dimensions of the pipes used for the testing; d) t

45、he test conditions; e) number of test pieces; f) observations of any damage and any delamination and their location; g) location and type of failures (ductile of brittle cracks) relative to the weld line, if any; h) the dimension d fof the cone; i) the internal diameter of the test piece at the mout

46、h of the test piece on the side of the d fzone after the test; j) if requested, the average of the forces applied to insert the cone and the average of the forces to withdraw the cone from the test piece; k) any factors which could have affected the results, such as incidents, or any operation detai

47、ls not mentioned in this Technical Report; l) date of the test. ISO/TR 18124:2006(E) 6 ISO 2006 All rights reservedBibliography 1 ISO 17454:2006, Plastics piping systems Multilayer pipes Test method for the adhesion of the different layers using a pulling rig 2 ISO 17455:2005, Plastics piping systems Multilayer pipes Determination of the oxygen permeability of the barrier pipe 3 ISO 17456:2005, Plastics piping systems Multilayer pipes Determination of long-term strength ISO/TR 18124:2006(E) ICS 23.040.20 Price based on 6 pages ISO 2006 All rights reserved