BS ISO 13265-2010 Thermoplastics piping systems for non-pressure underground drainage and sewerage - Joints for buried non-pressure applications - Test method for the long-term seas.pdf

1、BS ISO13265:2010ICS 23.040.20; 23.040.45; 91.140.80; 93.030NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDThermoplasticspiping systemsfor non-pressureunderground drainageand sewerage Joints for buried non-pressure applications Test method forthe long-term seali

2、ngperformance of jointswith elastomeric sealsby estimating thesealing pressureThis British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 30 June2010 BSI 2010ISBN 978 0 580 66715 2Amendments/corrigenda issued since publicationDate CommentsBS ISO 13265:2010Na

3、tional forewordThis British Standard is the UK implementation of ISO 13265:2010.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/88/1, Plastics piping for non-pressure applications.A list of organizations represented on this committee can be obtained onrequest to its s

4、ecretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS ISO 13265:2010Reference numberISO 13265:2010(E)ISO 2010INTERNATIONAL S

5、TANDARD ISO13265First edition2010-05-15Thermoplastics piping systems for non-pressure underground drainage and sewerage Joints for buried non-pressure applications Test method for the long-term sealing performance of joints with elastomeric seals by estimating the sealing pressure Systmes de canalis

6、ations thermoplastiques pour branchements et collecteurs dassainissement enterrs sans pression Assemblages pour applications enterres sans pression Mthode dessai de la performance long terme des assemblages avec garnitures dtanchit en lastomre par lestimation de la pression dtanchit BS ISO 13265:201

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10、given below. COPYRIGHT PROTECTED DOCUMENT ISO 2010 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 at

11、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 2010 All rights reservedBS ISO 13265:2010ISO 13265:2010(E

12、) ISO 2010 All rights reserved iiiContents Page Foreword iv 1 Scope1 2 Normative references1 3 Symbols2 4 Principle .2 5 Apparatus.3 6 Test pieces .4 6.1 General .4 6.2 Assembly4 6.3 Leaktightness of the test system.4 7 Test procedure.5 7.1 General .5 7.2 Procedure for determining the pressure.5 8 C

13、alculation and expression of the results6 8.1 Calculation .6 8.2 Example of calculation results.6 8.3 Continuation of test.7 9 Test report8 Annex A (informative) Example of a tube manufacturers specification9 Annex B (informative) Description of a training test assembly 10 Bibliography13 BS ISO 1326

14、5:2010ISO 13265:2010(E) iv ISO 2010 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.

15、 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 Interna

16、tional 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 Stan

17、dards 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 subje

18、ct of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 13265 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 1, Plastics pipes and fittings for soil, waste and drainage

19、 (including land drainage). BS ISO 13265:2010INTERNATIONAL STANDARD ISO 13265:2010(E) ISO 2010 All rights reserved 1Thermoplastics piping systems for non-pressure underground drainage and sewerage Joints for buried non-pressure applications Test method for the long-term sealing performance of joints

20、 with elastomeric seals by estimating the sealing pressure 1 Scope This International Standard specifies a method for determining the long-term sealing pressure of elastomeric seals in assembled joints for buried non-pressure sewerage plastics piping and ducting systems. 2 Normative references The f

21、ollowing 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 9967, Thermoplastics pipes Determination of creep

22、ratio EN 681-1, Elastomeric seals Materials requirements for pipe joint seals used in water and drainage applications Part 1: Vulcanized rubber EN 681-2, Elastomeric seals Materials requirements for pipe joint seals used in water and drainage applications Part 2: Thermoplastic elastomers EN 681-3, E

23、lastomeric seals Materials requirements for pipe joint seals used in water and drainage applications Part 3: Cellular materials of vulcanized rubber EN 681-4, Elastomeric seals Materials requirements for pipe joint seals used in water and drainage applications Part 4: Cast polyurethane sealing eleme

24、nts EN 837-1, Pressure gauges Part 1: Bourdon tube pressure gauges Dimensions, metrology, requirements and testing BS ISO 13265:2010ISO 13265:2010(E) 2 ISO 2010 All rights reserved3 Symbols B theoretical pressure, in bar1), in the PTFE tube at t = 1 h D drop factor of extrapolated pressure data at 2

25、4 h and 100 years M gradient of the curve ptpressure measured in the PTFE tube at a flow of 120 ml/min and the time t hours p0initial leakage pressure, in bar, measured in the PTFE tube after completing the assembly pta, ptb, ptcpressure measured in the three PTFE tubes in the tested joint, marked a

26、, b and c, respectively, at time t hours pxextrapolated pressure, in bar, at 100 years pycalculated pressure, in bar, at 24 h pxa, pxb, pxcextrapolated pressure, in bar, at 100 years in the three PTFE tubes in the tested joint, marked a, b and c, respectively p100yarithmetic mean value of the pressu

27、res obtained for each of the three extrapolated values, px, at 100 years p24harithmetic mean value of the pressures obtained for each of the three calculated values, py, at 24 h R correlation coefficient t time, in hours 4 Principle The sealing pressure in a joint is estimated by measuring the press

28、ure necessary to lift the seal, in each of three PTFE tubes equally distributed over the circumference of a joint located between the rubber seal and the spigot or socket, as appropriate (see Figure 1). In a temperature-controlled environment and at increasing time intervals, a constant flow rate of

29、 120 ml/min of nitrogen or air is forced through three flexible PTFE tubes. The nitrogen or air pressure, p, necessary to achieve this flow, is measured. The pressure, pt, is measured at increasing time intervals over a period of time. The extrapolated regression lines for ptare used to calculate th

30、e estimated value pxat 100 years and pyat 24 h. 1) 1 bar = 0,1 MPa = 105Pa; 1 MPa = 1 N/mm2. BS ISO 13265:2010ISO 13265:2010(E) ISO 2010 All rights reserved 3Key 1 regulator/pressure controller 2 pressure gauge 3 fixed coupler 4 PTFE tube 5 position of the tube in a joint with the sealing ring posit

31、ioned on the spigot 6 test assembly base 7 position of the tube in a joint with sealing ring positioned in the socket 8 connecting tube 9 flow meter aSource of nitrogen or clean air. Figure 1 Typical arrangement of the test assembly 5 Apparatus 5.1 Source of nitrogen, with a purity of at least 99,8

32、% or, alternatively, cleaned air (oil-free), both capable of supplying a flow of up to 200 ml/min and at a pressure of at least 10 bar. 5.2 Regulator/pressure controller, capable of regulating a stable pressure and flow increase up to 120 ml/min. 5.3 Pressure gauge, for measuring the pressure in the

33、 main line and capable of checking conformity to 7.2 (class 0,6 or better, as specified in EN 837-1). 5.4 Connecting tube, with an inside diameter of at least 4 mm. 5.5 PTFE tube, conforming to the following: a) capable of sustaining at least 10 bar pressure; b) the total thickness of the flattened

34、PTFE tube shall be between 0,16 mm and 0,24 mm, measured in the middle of the sample and carried out in two positions perpendicular to each other; c) the total width of the flattened tube shall be between 6 mm and 10 mm. NOTE The PTFE tube used for this test is a blown-up tube, normally applied as a

35、 shrinkage tube. The original diameter and wall thickness after shrinkage are normally specified. Blown-up dimensions are normally not specified. The given tolerances should be seen as a guide for the supplier. Care should be taken that the wall thickness and the diameter of the tube as received are

36、 verified. BS ISO 13265:2010ISO 13265:2010(E) 4 ISO 2010 All rights reserved5.6 Flow meter, with a capacity of 200 ml/min and a tolerance of 5 ml/min. 5.7 Means for storing test assembly, capable of fixing and storing the test assembly in such a way that no additional movements in the joint can occu

37、r. It shall be capable of fixing the PTFE tubes in such a way that, when connecting or disconnecting to the pressure gauge and flow meter, no movement of the PTFE tube in the sealing area can occur. 5.8 Lubricant, an aerosol of silicon (polydimethylsiloxane) with gas propellant (propane/butane). 6 T

38、est pieces 6.1 General Each test piece shall consist of a complete joint, together with its elastomeric seal and PTFE tube(s). Unless otherwise specified in the referring standard, the number of PTFE tubes shall be three, marked as a, b and c, equally spaced around the spigot. 6.2 Assembly Prior to

39、assembly, the test pieces shall be conditioned at the test temperature for at least 24 h. Clean the rubber sealing ring, the socket and the spigot. Prepare the PTFE tube by pressing it together several times until permanently flattened and place it along the smooth surface of the spigot or socket. L

40、ubricate the smooth wall in the joint (spigot or socket), the seal and PTFE tube(s). The lubricant defined in 5.8 shall be used. Use sufficient lubricant to ensure that the PTFE shrinkage tube(s) and seal can be assembled without damage, and the seal can equalize its position within the groove circu

41、mference. Assemble the socket and spigot, including the seal, in accordance with the manufacturers instructions and the following requirements. a) The joint shall be assembled in such a way that the PTFE tubes are mounted between the spigot or socket and the seal (see Figure 1); precautions shall be

42、 taken to avoid squeezing the PTFE tube outside the sealing area. b) It is permitted to mill a grove, insert thin plastics strips along the tube, drill holes in the spigot or socket or any other method that gives room for sufficient flow through the tube outside the sealing area. The method selected

43、 shall not significantly influence the creep behaviour of the joint in the sealing housing area. c) Make sure that the PTFE tube can move freely in the axial direction and that the flattened section of the PTFE tube is located under the sealing ring, and not distorted, when the joint is made. 6.3 Le

44、aktightness of the test system Make sure the pressurized side of the test equipment is leaktight after installation. Identify any leakage by soap solution. If necessary, reassemble the leaking joints. Avoid flow through the sealing zone during this operation. BS ISO 13265:2010ISO 13265:2010(E) ISO 2

45、010 All rights reserved 57 Test procedure 7.1 General The testing shall start between half an hour and 8 h after assembly and a leaktightness test performed in accordance with Clause 6. For each of the installed PTFE tubes, carry out the procedure according to 7.2 with the test pieces kept in the te

46、mperature-controlled environment at (23 2) C. Measure and record the sealing pressure, p, in bar, at 24 h, 168 h, 336 h, 504 h, 600 h, 696 h, 862 h, 1 008 h, 1 392 h and 2 000 h. Where it is not possible to read the pressure at the appropriate time between 500 h and 2 000 h, it is permitted to devia

47、te by up to 48 h, provided the actual measurement time is used in preparing the plots described in Clause 8. 7.2 Procedure for determining the pressure 7.2.1 Measure the leakage pressure, p0, in each of the three tubes individually, using the following procedure. a) Using the procedure described in

48、7.2.2 a), steadily increase pressure until a flow of 120 ml/min through the PTFE tube occurs. b) Measure and record this initial leakage pressure, p0. c) Reduce pressure to zero. 7.2.2 At each time interval as specified in 7.1, achieve a flow of 120 ml/min and measure and record the nitrogen (or air

49、) pressure, pt, in bar, using the following procedure for each of the three tubes individually. a) Increase pressure in increments of 0,5 bar until the level is 0,5 bar below p0or the previous measurement. Then continue to increase the pressure gradually and slowly. Occasionally, allow time for the pressure and flow to stabilize. Continue this process until the flow rate has been (120 5) ml/min for 60 s at the same pressure. Record the pressure as ptain bar. If the pressure reaches 10 bar