1、BS 4991 : March 1974 lb24bb7 0040223 2 a UDC 621.643.29-987 : 678.742.3-1 34.22 : 678.06-462 Confirmed Sept. 1982 Specification for (f Propylene copolymer pressure pipe Q British Standards Institution BSI BS*LiL i4 W Lb24669 OOLiO22Li 4 W This British Standard, having been approved by the Plastics I
2、ndustry Standards Committee, was published under the authority of the Executive Board on 29 March 1974. I 0 British Standards Institution, 1974. ISBN: O 580 08110 9 Copyright Users of British Standards are reminded that copyright subsists in all BSI publications. No part of this publication may be r
3、eproduced in any form without the prior permission in writing of BSI. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols and size, type or grade designations. Enquiries should be addressed to the BSI Secretariat. Contract requirement
4、s Attention is drawn to the fact that this British Standard does not purport to include all the necessary provisions of a contract. Revision of British Standards In order ta keep abreast of progress in the industries concerned, British Standards are subject to periodical review. Suggestions for impr
5、ovements will be recorded and in due course brought to the notice of the committees charged with the revision of the standards to which they refer. British Standards are revised, when necessary, by the issue either of amendment slips or of revised editions. It is important that users of British Stpn
6、dprds should ascertpin that they are in possession of the latest amendments or editions. Full information on all BSI publications, numbering over 9OOO will be found in the BSI Cardogue. This information is supplemented by details published each month in BSI News of new publications, revisions and am
7、endments. BSI News is available to Subscribing Members of the Institution. All other publications may be purchased direct from Sales Department. Enquiries concerning subscribing membership, which has considerable advantages, will be welcomed, and should be made to Subscriptions Department. Both depa
8、rtments are located at: Linford Wood, Milton Keynes MK14 6LE (Telephone 0908 320033; Telex 825777). The following BSI references relate to the work on this standard: n 2 Committee references PLM/9 PLM/9/2 . Draft for comment 72/50535DC Co-operating organizations The Plastics Industry Standards Commi
9、ttee, under whose supervision this British Standard was prepared, consists of representa- tives from the following Government departments and industrial organizations: *British Plastics Federation *Chemical Industries Association Ltd. *Ministry of Defence, Army Department *Ministry of Defence, Navy
10、Department *Oil Companies Materiais Association British Resin Manufacturers Association Department of the Environment, Building Research Department of Trade and Industry Electrical and Electronic Insulation Association Electrical Insulation Equipment Manufacturers Association Electrical Research Ass
11、ociation Ministry of Defence, Procurement Executive Plastics Institute Post office Royal Institute of Public Health and Hygiene Rubber and Plastics Research Association of Great Britain *Engineering Equipment Users Association The organizations marked with an asterisk in the above list, together wit
12、h the following, were directly represented on the com- mittee entrusted with the preparation of this British Standard: Agrment Board Association of Industrialized Building Component Association of Public Health Inspectors British Chemical and Dyestuffs Traders Association Ltd. British Compressed AU
13、Society British Gas Corporation British Industrial Biological Research Association British Rubber Manufacturers Association Ltd. British Waterworks Association Engineers Copper Tube Fittings Manufacturers Association Department of the Environment Gas List Tube Association Greater London Council Inst
14、itute of Plumbing Institution of Civil Engineers Establishment *Royal Institute of British Architects *Society of Motor Manufacturers and Traders Ltd. Institution of Municipal Engineers Institution of Public Health Engineers Institution of Water Engineers Lloyds Register of Shipping Ministry of Agri
15、culture, Fisheries and Food Ministry of Defence National Brassfoundry Association National Farmers Union National Federation of Plumbers and Domestic Heating National Institute for Research in Dairying Plastic Pipe Manufacturers Society Society of Builders Merchants Water Companies Association Water
16、 Research Association Manufacturers Ltd. BSI BSm4991 i4 W lb24669 0040225 b W BS 4991 : March 1974 UDC 621.643.29-987 : 678.742.3-1 34.22 : 678.06-462 Amd.No. c Date of issue Text affected Specification for Propylene copolymer pressure pipe British Standards Institution - 2 Park Street London WIA 2B
17、S Telephone O1 -629 9000 Telex 266933 BSI BSX4L i4 Lb2Libb 0040226 BS 4991 : 1974 Contents Co-operating organizations Foreword Specification 1. scope 2. Composition Inside front cover 2 3 3 3. Designation of dimensSmal characteristics 4 4. Classhation of pipe 4 5. Dimensions 5 6. Physical characteri
18、stics 5 7. Frequency of testing and retests 6 8. Marking 7 Appendices A. Method for the determination of thiodipropionate compounds 9 B. Method for the determination of toluene extract of carbon black 10 C. Heat reversion test 10 D. Short-term hydrostatic test (batch test) 11 E. Long-term hydrostati
19、c test (type test) 11 F. Tensile test G. Test for impact strength at O OC H. Equivalent values of maximum sustained working pressures Tables 1. A guide to working pressures at various temperatures and working life times with water 2. Dimensions 3. Short-term hydrostatic test pressure 4. Number of li
20、nes for round the clock testing 5. Mass of striker Figures 1. Figure deleted. 2. Figure deleted. 3. Suitable impact testing machine 13 13 14 4A 5 6 13 14 8 P 12 Foreword This British Standard is published under the authority of the Plastics Industry Standards Committee. The dimensions of the pipe ar
21、e in accordance with BS 3867, Outside diameters and pressure ratings of pipe of plastics materials . Maximum sustained working pressures and hydrostatic stress levels are specified in terms of bar+, but Appendix H gives equivalent values in technical metric and imperial units. The stress used as the
22、 basis for the calculation of minimum wali thickness is 49 bar, at 20 OC. The requirements for the effects of materiais upon water quality have been updated to ecabie pipes complying with this British Standard to be acceptable to UK water undertakings. A 1 bar = 0.1 MPa = 0.1 MN/mP. w 2 BS 4991 : 19
23、74 BSI BSm477L i4 Lb24bb7 0040227 T British Standard Specification for Propylene copolymer pressure pipe (- I. Scope This British Standard specifies requirements for propylene copolymer pressure pipe in two series. Series 1, for use with potable water, foodstuffs and pharmaceuticals. Series 2, for u
24、se with chemicals, including water at temperatures up to 100 “C. NOTE. The titles of the British Standards referred to in this standard are listed on the inside back cover. 2. Composition 2.1 Extrusion compound 2.1.1 The compound shall be manufactured from a copolymer of propylene and ethylene where
25、 lhe ethylene content is not greater than 10% by mass and the density is between 0.895 g/cm3 and 0.915 g/cm3 at 20 OC. 2.1.2 The antioxidants used shall be one or more of the following: (1) 2,4,6-tri-(3,5-ditertbutyl-4-hydroxybeenzyl) mesitylene; (2) octadecyl-3-(3,5-ditertbutyl-4-hydroxyphenyl) pro
26、pionate; (3) trb(4nonylphenyl) phosphite; (4) 1 , 1,3-tri-(5-tertbutyl-4-hydroxy-2-methylphenyl) butane; (5) pentaerythritol tetra-3-(3,5-difertbutyl-4-hydroxyphenyl) propionate; (6) 2,6-ditertbutyl-p-cresol. When tested by in accordance with BS 2782 : Method 434D the maximum antioxidant contents sh
27、all be /2 as foiiows: Series 1 pipe compound Series 2 pipe compound 0.35 % by mass; 1.5 % by mass. The compound may also contain not more than 0.5 % by mass of either didodecyL3,3-thiodipropionate or dioctadecyl-3,3-thiodipropionate as determined by the method described in Appendix A. 2.1.3 When bla
28、ck compound is used for Series 1 pipe intended for the conveyance of potable water the carbon black shall comply with the following requirements : Density Maximum volatile matter Average particle size Toluene extract 1.5 g/ml to 2.0 g/ml; 9.0% by mass; 0.010 pm to 0.025 pm; not more than O. 10 % by
29、mass when determined by the method described in Appendix B. 2.1.4 For Series 2 pipe compound the pigment content shall not exceed 3.0 %. 2.1.5 The addition of a manufacturers own rework material produced during the manufacture and works testing of pipe complying with this standard is permissible, pr
30、oviding such material is of the same series. No other rework material shall be used. 2.1.6 The extrusion compound, including any added rework material, when tested in accordance with . c., A test condition 12 of BS 2782 : Method 720A : 1979,shall have a melt flow index not exceeding 1.3: 2.2 Pipe ma
31、terial 2.2.1 Series 1 2.2.1.1 Black. The extruded pipe shall contain 2.5 f 0.5 % by mass of carbon black when tested in accordance with BS 7782 : Method 452B When tested across the pipe wall by the method described in BS 2782 : Method 823B : 1478, the numerical ratings for the dispersion of test pie
32、ces from carbon black pigmented pipes shaii be 5 or less and the uniformity of appearance in respect of smears and streaks shali Se equal to or better than photomicrograph,A of figure 1 of BS 2782 : Method 823B : 1978. of the revised BS 2782, in course of preparation. /2 8 _. The antioxidant content
33、 of the pipe shall be not less than 0.05% by mass when tested by Method 434D f, 3 BSI BS*477L 7Y = 1624bb 0040228 L BS 4991 : 1974 2.2.1.2 Natural. The extruded pipe shall consist of propylene copolymer containing not less than of antioxidant when tested in accordancc with BS 1782 : Me?liod 434D. 2.
34、2.1.3 Effect of nn-riietallic materials o11 water quality. When used under the conditions for which they are designed, non-metallic materiais in contact with or likely to come into contact with potable water shall not constitute a toxic hazard, shaii not support microbial growth and shall not give r
35、ise to unpleasant taste or odour, cloudiness or discoloration of the water. Concentrations of substances chemicals and biological agents leached from materiais in contact with potable water. and measurements of the relevant organoleptic/physical parameters shall not exceed the maximum values recomme
36、nded by the World Health . Organization in its publication Guidelines for drinking water quality Vol. 1 Recommenda- tions (WHO, Geneva, 1984)* or as required by the EEC Council Directive of 15 July 1980 relating to the quality of water intended for human consumption (Official Journal of the European
37、 Communities L229: pp 11-29)*? whichever in each case is the more stringent. NOTE 1. Requirements for the testing of non-metallic materials in these respects are set out in the UK Water Fittings Byelaws Scheme Information and Guidance Note No. 5-01-02, ISSN 02674313, obtainable from the Water Resear
38、ch Centre, Water Byelaws Advisory Service, 660 Ajax Avenue, Slough, Berkshire SL14BG. NOTE 2. Pending the determination of suitable means of characterizing the toxicity of leachates from materials in contact with potable water, materials approved by the Department of the Environment Committee on Che
39、micals and Materials of Construction for use in Public Water Supply and Swimming Pools are considered free from toxic hazard for the purposes of compliance with this subclause. A list of approved chemicals and materials is available from the Technicai Secretary of that Committee at the Department of
40、 the Environment, Water Division, Romney House, 43 Marsham Street, London SWIP 3PY. NOTE 3. Products manufactured for installaxion and use in the Unixed Kingdom which are verified and listed under the UK Water Fittings Byelaws Scheme admhktered by the Water Research Centre (address as in note 1) are
41、 deemed to satisfy the requirements detailed in this subciause. Insert the following footnote. *Available from HMSO. - . . -. . -. . . I - _ - 2.2.2 Series 2. Extruded pipe shall be pigmented grey* and contain not less than 0.500i cprhon hisck content of polyolefin compiwnd -70h fieterminmon of meir
42、 ;.low rate oi thermoplastics Method Y23X driii Y23H Veriiods or the assessment o1 carbon black Jspcrsion in pol!ctliylcnc Iisiiig a iiiicrosccipe . BS 3867 BS 3978 BS 4123 BS 4159 Outside diameters and pressure ratings of pipe of plastics materiais Water for laboratory use Schedule of preferred che
43、mical indicators Colour marking of plastics pipes to indicate pressure ratings Amd. No. British Standards Institution . 2 Park Street London W1A 2BS . Telephone 01-629 9000 - Telex 266933 Date of issue Text affected 841 1-74.1 k-6 . . AMD 2262 April 1977 AMD 2262 April 1977 7704-2.2k-8 AMD 2262 Amen
44、dment Slip No.1, published 29 April 1977 to BS 4991 : 1974 Propylene copolymer pressure pipe Revised text Clause 4.2 Delete the existing text and substitute the following: A guide to working pressures for grey pigmented Series 2 pipe transporting a non-aggressive fluid (e.g. water) at elevated tempe
45、ratures for shorter periods of service than 50 years is given in table 1 . Table 1, A guide to working pressures at various temperatures and working life times with water Delete the existing text and table entirely and substitute the following: Table 1. A guide to working pressures for grey pigmente
46、d Series 2 pipe If grey pigmented Series 2 pipe is required to be used for the transport of non-aggressive fluids (e.g. water) at temperatures higher than 20 “C or if a shorter period of anticipated service than 50 years is acceptable, the following multiplying factors can be used to calculate the p
47、ermissible sustained working pressures from the nominal class pressures given in 4.1. Wo1king “C temperature 20 40 60 80 1 O0 Acceptable duration of service life Year 1 5 10 50 1 5 10 50 1 5 10 1 5 10 1 5 hultiplying factor 1.40 1.21 1.14 1 .o0 0.96 0.80 0.76 0.60 O .66 0.54 0.50 O .42 0.30 0.22 0.2
48、8 0.14 Gr O . -7 AMD 6337 July 1987 AMD 6337 July 1987 AMD 6337 July 1987 AMD 6337 July 1987 AMD 6337 July 1987 AMD 6337 July 1987 AMD 5337 July 1987 - BSI BS*477L 74 I Lb24bh 00402g3 8 I AMD 5337 Amendment No. 2 published and effective from 31 July 1987 to BS 4991 : 1974 Specification for propylene
49、 copolymer pressure pipe Revised text Inside front cover Delete the committee references PLC/9, PLC/9/2, PLC/9/3 and substitute PLM/9 and PLM/9/2. Contents In the entries for figures 1 and 2, delete the title and substitute Figure deleted. . Foreword After paragraph 3, insert the following paragraph: The requirements for the effects of materials upon water quality have been updated to enable pipes complying with this British Standard to be acceptable to UK water undertakings. Clause 2.1.2 In paragraph 2, line 1, delete by M
