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1、BRITISH STANDARD BS 3505:1986 Incorporating Amendment No. 1 Specification for Unplasticized polyvinyl chloride (PVC-U) pressure pipes for cold potable water UDC 621.643.29:678.743.22:696.11 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 04:26:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS
2、3505:1986 This British Standard, having been prepared under the direction of the Plastics Standards Committee, was published under the authority of the Board of BSI and comes into effect on 31 December 1986 BSI 01-1999 First published April 1962 First revision October 1968 Second revision The follow
3、ing BSI references relate to the work on this standard: Committee reference PLM/9 Draft for comment 85/43505 DC ISBN 0 580 15562 5 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Plastics Standards Committee (PLM/-) to Technical Committe
4、e PLM/9, upon which the following bodies were represented: British Gas Corporation British Plastics Federation British Valve Manufacturers Association Ltd. Copper Tube Fittings Manufacturers Association Department of the Environment (Housing and Construction Industries) Department of the Environment
5、 (Property Services Agency) Department of Transport (Highways) Electricity Supply Industry in England and Wales Engineering Equipment and Materials Users Association Institution of Civil Engineers Institution of Production Engineers Institution of Public Health Engineers Institution of Water Enginee
6、rs and Scientists National Association of Plumbing, Heating and Mechanical Services Contractors Plastics and Rubber Institute Plastics Land Drainage Manufacturers Association Royal Institute of Public Health and Hygiene Water Authorities Association Water Companies Association Water Research Centre
7、The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Institute of Plumbing Ministry of Agriculture, Fisheries and Food National Brassfoundry Association Standards Association of Australia Amendments issued since publication Amd. No.Date of iss
8、ueComments 6130November 1988 Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 04:26:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3505:1986 BSI 01-1999i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Material1 3Pressure class
9、ification of pipes1 4Dimensions and tolerances1 5Performance requirements1 6Physical properties3 7Marking4 Appendix A Method for the analysis of results from the determination of the long-term hydrostatic strength of pipe at 20 C5 Appendix B Method for the determination of impact resistance at 20 C6
10、 Appendix C Method for the determination of fracture toughness8 Appendix D Guidance on calculation of fracture toughness14 Appendix E Quality control testing15 Figure 1 Suitable type of impact testing apparatus7 Figure 2 Chart for number of strikes needed to obtain a true impact rate (TIR) of 10 % w
11、ith a 90 % confidence limit9 Figure 3 Fracture toughness test piece12 Figure 4 Typical arrangement of the test piece and equipment for testing for fracture toughness12 Table 1 Pipe dimensions for 9 bar (class C), 12 bar (class D) and 15 bar (class E) pipes2 Table 2 Minimum circumferential wall stres
12、s values3 Table 3 Test piece immersion periods4 Table 4 Minimum 1 h failure pressure4 Table 5 Failure point distribution5 Table 6 Percentage points of Students t distribution (upper 2 % points)6 Table 7 Mass of striker6 Table 8 Number of lines to be drawn along test specimens8 Table 9 Pipe wall thic
13、kness factor, Fe13 Table 10 Ring geometry factor, Fr14 Table 11 Primary purposes of requirements and test methods16 Publications referred to18 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 04:26:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3505:1986 ii BSI 01-1999 Foreword This revision
14、 of BS 3505 has been prepared under the direction of the Plastics Standards Committee and supersedes the 1968 edition, which is withdrawn. The main differences between this revision and the 1968 edition are as follows. a) The size range has been rationalized with the removal of nominal sizes 2, 7, 9
15、 and 22. (Although the pipe dimensions are expressed in metric units, this standard continues to designate the nominal size of pipes in inch equivalent figures to avoid confusion with pipe sizes having dimensions in accordance with metric series values in ISO 161/1.) The class B classification has a
16、lso been removed. b) Requirements for the effects of materials on water quality have been modified. c) The method for the determination of long-term hydrostatic strength has been modified, so that the maximum period over which test results are to be obtained at 20 C has been extended from not more t
17、han 1 000 h to not less than 10 000 h. d) A requirement for resistance to hydrostatic pressure at 60 C has been added. e) A requirement for fracture toughness has been added, together with an associated method of test (see appendices C and D). f) The method for assessment of impact resistance has be
18、en modified to establish a maximum true impact rate (TIR) at a specified confidence level. g) Some restrictions have been placed on the colour of pipes, depending upon their size and intended installation and taking the following into account. The National Joint Utilities Group has agreed that all b
19、uried thermoplastics utilities services up to 75 mm in external diameter should be colour coded for identification purposes. Among the conclusions given in the Groups Publication No. 4 “The identification of small buried mains and services” is that the colour selected for potable water pipes be blue
20、. For this purpose, it is desirable to avoid the shade allocated for use by compressed air lines in accordance with BS 1710. If grey, the colour should be dark enough to avoid those shades used for telecommunications ducting. h) The requirements of this standard have been made verifiable, so that th
21、ird party certification may be applied. Guidance provided on the periodic maintenance of equipment or on quality control testing is therefore given in the form of notes and in an advisory appendix (see appendix E). The recommended maximum working stress of the material continues to be based on three
22、 values according to nominal size, as follows: a maximum stress of 9.8 MPa has been used for calculating the minimum wall thickness of pipes of nominal size up to , one of 11.0 MPa for nominal sizes 1 to 6 inclusive and one of 12.3 MPa for pipes of nominal size 8 and above. Attention is drawn to CP
23、312-2, which gives guidance on the use of pipes manufactured in accordance with this standard. Attention is also drawn to BS 4346-2, which specifies joints and fittings for use with unplastized PVC pressure pipes. It has been assumed in the preparation of this British Standard that the execution of
24、its provisions is entrusted to appropriately qualified and experienced personnel. Purchasers ordering to this standard are advised to specify in their purchasing contract that the supplier operate a quality system in compliance with BS 5750-2 to assure themselves that products claimed to comply with
25、 BS 3505 consistently achieve the required level of quality. Certification. Attention is drawn to the certification facilities described on the inside back cover. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 04:26:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3505:1986 BSI 01-1999iii A
26、British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. In particular, attention is drawn to water
27、industry requirements for materials in contact with potable water. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, pages 1 to 18, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incor
28、porated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 04:26:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 04:26:22 GMT+00:00 2006, Uncontrolled Copy, (c)
29、 BSI BS 3505:1986 BSI 01-19991 1 Scope This British Standard specifies requirements for unplasticized polyvinyl chloride (PVC-U) pipes up to and including nominal size 24, for conveying cold potable water at pressures up to and including 9, 12 or 15 bar1) at 20 C, depending on the size. Methods of t
30、est, associated guidance and information on quality control testing are given in appendices. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Material 2.1 Base material The material from which the pipe is produced shall be polyvinyl chloride with
31、 additives as necessary for the manufacture of pipe in accordance with this standard and to satisfy colour requirements, if applicable (see foreword and 6.1.2). 2.2 Reworked material If reworked material is added or used, it shall be clean and in accordance with 2.1; it shall be derived from pipe pr
32、oduced in accordance with this standard, reground under the supervision of the same manufacturer and used only in the production of pipe sizes up to and including nominal size 6. 3 Pressure classification of pipes Pipes are classified by maximum sustained working pressure, as follows: a) 9 bar (clas
33、s C); b) 12 bar (class D); c) 15 bar (class E). NOTEThe working pressures given above are the calculated maximum sustained working pressures for the conveyance of cold water at a temperature of 20 C. For use at higher temperatures or under conditions of pulsating pressures, reference should be made
34、to CP 312-2. 4 Dimensions and tolerances 4.1 Nominal size The nominal size of the pipe shall be one of the sizes given in Table 1. 4.2 Outside diameter When determined in accordance with BS 2782: Method 1101A, the outside diameter of the pipe shall comply with the limits specified in Table 1 for the
35、 relevant nominal size of the pipe. 4.3 Wall thickness When determined in accordance with BS 2782: Method 1101A, the wall thickness of the pipe shall comply with the limits specified in Table 1 appropriate to the nominal size and class of pipe. The average wall thickness of the pipe shall be determi
36、ned by taking the arithmetic mean of at least the following number of measurements of wall thickness around the pipe, including both the minimum and maximum values: a) up to and including 6 mm wall thickness: four measurements; b) greater than 6 mm wall thickness: six measurements. 4.4 Tolerance on
37、length The ends of pipes shall be cut cleanly and squarely. If the length of a pipe is specified, the effective length shall be not less than that specified, when determined at 23 2 C. NOTEThe preferred effective lengths of pipe are 6 m or 9 m. For plain-ended pipes, the effective length corresponds
38、 to the overall length. For pipes with an integrally formed ring seal joint in accordance with BS 4346-2, the effective length does not include the length required for the joint. 5 Performance requirements 5.1 General The requirements given in 5.2 and 5.3 shall be met, subject to 5.4, which shall ap
39、ply whenever a change in process technique or introduction of a new or modified compound has occurred. The relevant tests shall be applied to pipe taken from a production run from which the product has complied with all the other requirements of this standard. 5.2 Hydrostatic properties NOTEAttentio
40、n is drawn to advice given in appendix E concerning samples of pipes of different design stress categories, formulations, pressure classifications and sizes. 5.2.1 Long-term hydrostatic strength at 20 C. When test pieces in accordance with 5.2.2 are tested at 20 1 C in accordance with BS 4728, and t
41、he results are analysed in accordance with appendix A, the extrapolated values for circumferential wall stress for the periods of time given in Table 2 shall comply with the limits specified in Table 2 according to the applicable design stress category. 1) 1 bar = 105 N/m2 = 0.1 MPa Licensed Copy: s
42、heffieldun sheffieldun, na, Wed Nov 29 04:26:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3505:1986 2 BSI 01-1999 Table 1 Pipe dimensions for 9 bar (class C), 12 bar (class D) and 15 bar (class E) pipes Nominal size Mean outside diameter Individual outside diameter Wall thickness min.max. min.ma
43、x.9 bar (class C)12 bar (class D)15 bar (class E) Average valueaIndividual valueAverage valueaIndividual valueAverage valueaIndividual value max.min.max.max.min.max.max.min.max. mmmmmmmmmmmmmmmmmmmmmmmmmm 17.017.317.017.31.91.51.9 21.221.521.221.52.11.72.1 26.626.926.626.92.51.92.5 133.433.733.333.8
44、2.72.22.7 142.142.442.042.52.72.22.73.22.73.2 148.148.448.048.53.02.53.03.73.13.7 260.260.560.060.73.02.53.03.73.13.74.53.94.5 388.789.188.489.44.13.54.15.34.65.36.55.76.6 4114.1114.5113.7114.95.24.55.26.86.06.98.37.38.4 5140.0140.4139.4141.06.35.56.48.37.38.410.19.010.4 6168.0168.5167.4169.17.56.67
45、.69.98.810.212.110.812.5 8218.8219.4218.0220.28.87.89.011.610.311.914.112.614.5 10272.6273.4271.6274.410.99.711.214.312.814.817.515.718.1 12323.4324.3322.2325.512.911.513.317.015.217.520.818.721.6 14355.0356.0353.7357.314.112.614.518.616.719.222.820.523.6 16405.9406.9404.3408.516.214.516.721.119.021
46、.926.023.427.0 18456.7457.7454.9459.518.216.318.823.821.424.6 20507.5508.5505.4510.620.218.120.9 24609.1610.1606.5612.724.121.725.0 a See 4.3. 38 12 34 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 04:26:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3505:1986 BSI 01-19993 5.2.2 Test piec
47、es. Up to nominal size 12, the test piece shall be a pipe of minimum free length between end fittings in millimetres of three times the nominal size or 250 mm, whichever is the greater. For nominal sizes above 12, that minimum free length shall be 1 000 mm. The test piece shall be closed with pressu
48、re-tight caps or plugs in accordance with any of the types shown in figure 1, 2 and 3 of BS 4728:1971. 5.2.3 Long-term hydrostatic pressure resistance at 60 C. When tested at a temperature of 60 1.0 C in accordance with BS 4728, samples of pipe shall withstand an internal pressure equivalent to a ho
49、op stress of 10.0 MPa for 1 000 h without failure. The samples of pipe shall comprise test pieces in accordance with 5.2.2. Table 2 Minimum circumferential wall stress values 5.3 Effect of materials on water quality When used under the conditions for which they are designed, non-metallic materials in contact with or likely to come into contact with potable water shall not constitute a toxic hazard, shall not support microbial growth and shall not give rise to unpleas