BS ISO 21307-2011 Plastics pipes and fittings Butt fusion jointing procedures for polyethylene (PE) pipes and fittings used in the construction of gas and water distribution system.pdf

1、BSI Standards PublicationBS ISO 21307:2011Plastics pipes and fittings Butt fusion jointing proceduresfor polyethylene (PE) pipesand fittings used in theconstruction of gas and waterdistribution systemsBS ISO 21307:2011Incorporating corrigendum January 2016BS ISO 21307:2011 BRITISH STANDARDNational f

2、orewordThis British Standard is the UK implementation of ISO 21307:2011.The UK participation in its preparation was entrusted by Technical Committee PRI/88, Plastics piping systems, to Subcommittee PRI/88/2, Plastics piping for pressure applications.A list of organizations represented on this subcom

3、mittee can be obtained on 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. The British Standards Institution 2016. Published by BSI Standards Limited 2016ISBN 978 0 580 92643 3ICS 23.0

4、40.20; 23.040.45; 75.200; 93.025Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2011.Amendments/corrigenda issued since publicationDate Text affected31 J

5、anuary 2016 Implementation of ISO corrected text 1 June 2011: Correction information detailed in ISO ForewordReference numberISO 21307:2011(E)ISO 2011INTERNATIONAL STANDARD ISO21307Second edition2011-05-15Corrected version2011-06-01Plastics pipes and fittings Butt fusion jointing procedures for poly

6、ethylene (PE) pipes and fittings used in the construction of gas and water distribution systems Tubes et raccords en matires plastiques Modes opratoires dassemblage par soudage bout bout de tubes et raccords en polythylne (PE) utiliss pour la construction de systmes de distribution de gaz et deau IS

7、O 21307:2011(E) COPYRIGHT PROTECTED DOCUMENT ISO 2011 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

8、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 Switzerland ii ISO 2011 All rights reservedBS ISO 21307:2011ISO 21307:201

9、1(E)ISO 21307:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions .2 4 Butt fusion jointing process.3 4.1 General .3 4.2 Principle4 4.3 Cleaning the pipe or fitting ends, planing unit and heater surfaces4 4.4 Clamp

10、ing the components .4 4.5 Planing the pipe or fitting ends5 4.6 Aligning the pipes or fittings5 4.7 Measuring the drag pressure .5 4.8 Melting the pipe or fitting ends 5 4.9 Jointing the pipe or fitting ends.5 4.10 Cooling the pipe or fitting ends .5 5 Butt fusion jointing procedures.5 5.1 Single lo

11、w-pressure fusion jointing procedure6 5.2 Dual low-pressure fusion jointing procedure.7 5.3 Single high-pressure fusion jointing procedure 8 6 Quality control .9 6.1 General .9 6.2 Joint integrity testing9 6.3 Non-destructive quality control procedures.9 Annex A (informative) Examples of single low-

12、pressure, dual low-pressure and single high-pressure procedures.10 BS ISO 21307:2011ISO 21307:2011(E)ISO 21307:2011(E) iv ISO 2011 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work

13、 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-governmen

14、tal, 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 ma

15、in 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. At

16、tention 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 21307 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the t

17、ransports of fluids, Subcommittee SC 4, Plastics pipes and fittings for the supply of gaseous fuels. This second edition cancels and replaces the first edition (ISO 21307:2009), which has been technically revised. This corrected version of ISO 21307:2011 incorporates the following corrections: 5.1:

18、The first sentence has been modified. 5.2: The first sentence has been modified. Table A.1: The title has been modified. A.3: The subclause heading has been modified. Table A.3: The title has been modified. BS ISO 21307:2011ISO 21307:2011(E)ISO 21307:2011(E) ISO 2011 All rights reserved vIntroductio

19、n With the increasing use of bimodal polyethylene (PE) materials such as PE 80 and PE 100, more and more PE compounds are appearing on the pipe market accompanied by proposals for butt fusion procedures that often differ for the same materials. The aim of standardization is to encourage the use of s

20、imilar procedures for similar materials. There is a need to examine current practice on a global scale and establish the best procedure(s) for the highest-quality, most reliable and efficient construction of PE butt fusion systems for gas and water distribution. BS ISO 21307:2011ISO 21307:2011(E)Thi

21、s page deliberately left blankINTERNATIONAL STANDARD ISO 21307:2011(E) ISO 2011 All rights reserved 1Plastics pipes and fittings Butt fusion jointing procedures for polyethylene (PE) pipes and fittings used in the construction of gas and water distribution systems 1 Scope This International Standard

22、 establishes general principles regarding the procedure used in the construction and quality assessment of butt fusion joints incorporating fittings (ISO 8085-2) and pipes used in the construction of gas (ISO 4437) and water (ISO 4427) distribution systems made with equipment that complies with ISO

23、12176-1 and installed in accordance with ISO/TS 10839, relevant codes of practice, national regulations or industry guidance. Specifically, this International Standard specifies a number of proven butt fusion jointing procedures for pipes and fittings with a wall thickness up to and including 70 mm.

24、 This International Standard takes into consideration the materials and components used, the fusion jointing procedure and equipment and the quality assessment of the completed joint. It can be applied in conjunction with appropriate national regulations and standards. NOTE It is important that pipe

25、 or fitting manufacturers and equipment manufacturers be consulted when undertaking butt fusion jointing of pipes with a wall thickness greater than 70 mm. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the

26、 edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1167-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 1: General method ISO 116

27、7-3, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 3: Preparation of components ISO 1167-4, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pr

28、essure Part 4: Preparation of assemblies ISO 4065, Thermoplastics pipes Universal wall thickness table ISO 4427 (all parts), Plastics piping systems Polyethylene (PE) pipes and fittings for water supply ISO 4437, Buried polyethylene (PE) pipes for the supply of gaseous fuels Metric series Specificat

29、ions ISO 8085-2, Polyethylene fittings for use with polyethylene pipes for the supply of gaseous fuels Metric series Specifications Part 2: Spigot fittings for butt fusion, for socket fusion using heated tools and for use with electrofusion fittings ISO/TS 10839, Polyethylene pipes and fittings for

30、the supply of gaseous fuels Code of practice for design, handling and installation BS ISO 21307:2011ISO 21307:2011(E) 2 ISO 2011 All rights reservedISO 12176-11), Plastics pipes and fittings Equipment for fusi on jointing polyethylene systems Part 1: Butt fusion ISO 13953, Polyethylene (PE) pipes an

31、d fittings Determination of the tensile strength and failure mode of test pieces from a butt-fused joint ASTM F2634, Standard test method for laboratory testing of polyethylene (PE) butt fusion joints using tensile-impact method 3 Terms and definitions For the purposes of this document, the followin

32、g terms and definitions apply. 3.1 cooling-cycle reduced pressure reduced pressure, used in the cooling cycle of the dual low-pressure procedure after jointing time 3.2 cooling time in the machine under pressure time period during which the butt fusion joint remains under pressure when still clamped

33、 in the machine 3.3 cooling time in machine without pressure or out of machine additional cooling period that may be required after the cooling time under pressure to ensure optimum joint strength, particularly when working at high ambient temperatures and prior to rough handling or pipe installatio

34、n 3.4 drag pressure gauge pressure required to overcome, on a given machine, the sliding frictional drag force of the machine and pipe 3.5 fusion jointing pressure actual pressure exerted on the pipe or fitting ends during jointing 3.6 gauge pressure actual pressure read by the gauge of the butt fus

35、ion jointing machine 3.7 heater plate removal time heater plate dwell time time taken to separate the pipe or fitting ends from the heater plate, remove the heater plate and close the carriage in order to bring the molten pipe or fitting ends together 3.8 heater plate temperature measured temperatur

36、e on the surface of the heater plate where the pipe or fitting wall cross-section makes contact 3.9 heat soak pressure pressure required to maintain the pipe or fitting in contact with the heater plate 1) To be published. (Revises ISO 12176-1:2006) BS ISO 21307:2011ISO 21307:2011(E)ISO 21307:2011(E)

37、 ISO 2011 All rights reserved 33.10 heat soak time time during which the heater plate is in contact with the pipe or fitting ends at the heat soak pressure 3.11 minimum bead size after heating minimum value of bead size to be attained after completing the heat soak time 3.12 initial bead-up pressure

38、 pressure exerted on the heater plate by the pipe or fitting ends during the bead-up phase of the jointing cycle, including drag pressure exerted on the pipe or fitting ends during jointing 3.13 initial bead-up time time taken to generate a continuous bead, of a specified dimension, around the circu

39、mference of the ends of the pipes or fittings 3.14 initial bead-up size bead size formed on the pipe or fitting ends during the bead-up phase NOTE Initial bead-up size is expressed in millimetres. 3.15 fusion jointing time dual low-pressure time period allotted for bead roll-over before cooling-cycl

40、e reduced pressure 3.16 nominal wall thickness enwall thickness tabulated in ISO 4065, corresponding to the minimum wall thickness at any point ey NOTE Nominal wall thickness is expressed in millimetres. 3.17 operator person authorized to build polyethylene (PE) systems from pipes and/or fittings, b

41、ased on a written procedure agreed by the pipeline operator 3.18 pipeline operator private or public organization authorized to design, construct and/or operate and maintain a pipeline supply system 4 Butt fusion jointing process 4.1 General Polyethylene (PE) pipes for the production of butt fusion

42、joints in accordance with this International Standard shall conform to ISO 4437 (alternatively ISO 4427). Fittings shall conform to ISO 8085-2. Butt fusion joints in accordance with this International Standard shall be produced on equipment for fusion jointing PE systems conforming to ISO 12176-1. B

43、S ISO 21307:2011ISO 21307:2011(E)ISO 21307:2011(E) 4 ISO 2011 All rights reserved4.2 Principle The principle of butt fusion jointing is to heat two pipe or fitting ends by means of a heater plate to a designated temperature, then fuse them together by applying pressure and cool them under pressure f

44、or a designated time. Butt fusion joints shall be made by qualified operators using butt fusion jointing machines that secure and precisely align the pipe ends. The training and level of skill of the operator shall be in accordance with the requirements of the jointing procedure. A written jointing

45、procedure, authorized by the pipeline operator, shall be available prior to the construction of a pipeline. The jointing procedure shall include specification of the jointing method, the fusion parameters, the fusion equipment, the jointing conditions, the level of skill of the operator, and the qua

46、lity control methods to be used. Guidelines for quality control are given in Clause 6. Key elements of the jointing process shall include: a) cleaning the pipe or fitting ends, planing unit and heater surfaces; b) clamping the components to be joined (pipe support may be required to ensure proper al

47、ignment and the pipe support may also need to incorporate rollers to reduce drag pressure); c) planing the pipe or fitting ends; d) aligning the pipes or fittings; e) measuring the drag and compensating pressure accordingly; f) melting the pipe or fitting ends; g) jointing the pipe or fitting ends;

48、h) holding the pipe or fitting ends under pressure for the duration of the cooling time in the machine; i) completing the cooling time in machine without pressure or out of machine if required. These key elements are explained in more detail in 4.3 to 4.10. 4.3 Cleaning the pipe or fitting ends, pla

49、ning unit and heater surfaces Before placing them in the machine, clean the inside and outside of the pipe or fittings to be joined by wiping the joint area with a clean lint-free cloth. All foreign matter shall be removed from the jointing area. If the pipe has a protective outer layer, it shall be peeled back far enough so that the pipe can be properly clamped in the fusion machine, unless otherwise specified by the pipe manufacturer. Clean the planing unit and the heater plate surfaces w