1、BRITISH STANDARD BS 65:1991 Incorporating Amendment No. 1 Specification for Vitrified clay pipes, fittings and ducts, also flexible mechanical joints for use solely with surface water pipes and fittingsBS65:1991 This British Standard, having been prepared under the directionof the Technical Committe
2、e for Waste Water Engineering, was published underthe authority of the Standards Board and comes intoeffect on 31 October 1991 BSI 02-1999 The following BSI references relate to the work on this standard: Committee reference B/505 Draft for comment 89/15819 ISBN 0 580 20268 2 Committees responsible
3、for this British Standard The preparation of this British Standard was entrusted by the Technical Committee for Waste Water Engineering B505 to Subcommittee B/505/2, upon which the following bodies were represented: British Ceramic Research Limited Clay Pipe Development Association Limited Departmen
4、t of the Environment (Property Services Agency) Department of Transport Federation of Civil Engineering Contractors Institution of Civil Engineers Institution of Water and Environmental Management Society of British Water Industries Water Services Association of England and Wales Amendments issued s
5、ince publication Amd. No. Date Comments 8622 May 1995 Indicated by a sideline in the marginBS65:1991 BSI 02-1999 i Contents Page Committees responsible Inside front cover Foreword iii Section 1. General 1 Scope 1 2 References 1 3 Definitions 1 4 Materials and manufacture 1 Section 2. Pipes 5 Dimensi
6、ons and tolerances 2 6 Performance requirements 2 Section 3. Fittings 7 Dimensions and tolerances 4 8 Performance requirements 4 Section 4. Flexible mechanical joints 9 Performance requirements 5 Section 5. Sampling for tests 10 Sampling of pipes and fittings 6 11 Sampling of joints 6 12 Limitations
7、 7 Section 6. Marking 13 Marking 7 Appendix A Straightness test 8 Appendix B Crushing strength test 8 Appendix C Bending moment resistance (BMR) test 11 Appendix D Pressure tests 13 Appendix E Chemical resistance test for pipes and fittings 13 Appendix F Water absorption and acid resistance tests fo
8、r extra chemicallyresistant pipes and fittings 13 Appendix G Mechanical test methods for joint assemblies 14 Appendix H Inspection procedures 16 Figure 1 Terminology for straightness test method 8 Figure 2 Example of use of suitable straightness test apparatus 8 Figure 3 Bearer shape 9 Figure 4 Typi
9、cal arrangement for crushing strength test 11 Figure 5 Diagrammatic arrangement of the four point loading test method 12 Figure 6 Diagrammatic arrangement of the three point loading test method 12 Figure 7 Deflection test 14 Figure 8 Shear resistance test 15 Table 1 Dimensions of barrels 2 Table 2 M
10、aximum permissible deviation from straightness (D s ) 2 Table 3 Crushing strength 3 Table 4 Bending moment resistance 3 Table 5 Maximum water absorption 3 Table 6 Applicable dimensional and performance requirements for fittings 5BS65:1991 ii BSI 02-1999 Page Table 7 Deflections 6 Table 8 Relevant sa
11、mpling procedures and test clauses forpipes and fittings 6 Table 9 Preconditioning time for strength tests 8 Table 10 Support distance for shear resistance tests 15 Table 11 Normal inspection for both single and doublesampling plans 16 Table 12 Reduced inspection for both single and double sampling
12、plans 17 Table 13 Limit numbers for reduced inspection 17 Table 14 Tightened inspection for both single and double sampling plans 17 Table 15 Tightened inspection for resubmission of rejected batches 17 Publication(s) referred to Inside back coverBS65:1991 BSI 02-1999 iii Foreword This British Stand
13、ard has been prepared under the direction of the Technical Committee for Waste Water Engineering by the Subcommittee for Vitrified Clay Pipes. It covers those products previously specified in BS65:1988 “Vitrified clay pipes, fittings, joints and ducts” which are not specified in the European Standar
14、d BSEN295 “Vitrified clay pipes and fittings and pipe joints for drains and sewers Part 1: Requirements or Part 5: Requirements for perforated vitrified clay pipes and fittings”. This has been accomplished by the deletion of all reference to normal pipes with flexible mechanical joints, which are co
15、vered by BSEN295, and which has necessitated a change of scope of the standard. A previously omitted definition of “pipe section” has been included. Perforated vitrified clay pipes and fittings may be produced to either BS65:1991 or BSEN295-5:1994 until 31March1995, after which date BS65 will cease
16、to apply to perforated pipes. Requirements appropriate to each of several types of pipe, fitting and duct are specified for dimensions and tolerances and for performance. These requirements are supported by sampling procedures to facilitate quality control and by test methods for verification of com
17、pliance with the standard. The sampling procedures are consistent with BS6000, BS6001 and BS6002. Requirements for extra chemically resistant pipes and fittings are included, but the standard does not apply to joints for these products, since these have to be formulated to be specifically resistant
18、to the chemical effluents to be conveyed. The attention of users of this standard is drawn to the advantages to be gained from an assurance of compliance afforded by independent schemes of continuing supervision and control. Purchasers ordering to this standard are advised to specify in their purcha
19、sing contract that the supplier operates a quality system which complies with Part2 of BS5750, to assure themselves that products claimed to comply with BS65 consistently achieve the required level of quality. This edition introduces technical changes but it does not reflect a full review or revisio
20、n of the standard, which will be undertaken in due course. A 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 l
21、egal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, pages1to18, aninsidebackcover and aback cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table o
22、n theinside front cover.iv blankBS65:1991 BSI 02-1999 1 Section 1. General 1 Scope This British Standard specifies requirements for vitrified clay pipes and fittings with or without sockets, and compatible accessories, for the construction of drainage and sewerage systems, operated as gravity pipeli
23、nes, or for use as ducts. Normal and extra chemically resistant pipes and fittings are covered by the standard, when supplied without flexible mechanical joints, for example to meet repair situations or for use with special jointing compounds. Surface water pipes and fittings are also covered by the
24、 standard, together with ducts. The standard applies to both glazed and unglazed products. The standard also specifies performance requirements for flexible mechanical joints used with surface water clay pipes and fittings. NOTEThe pipes and fittings specified may be suitable for use with joints oth
25、er than flexible mechanical joints but such joints are outside the scope of this standard. The requirements specified cover certain dimensions and tolerances, physical and performance characteristics, marking and sampling, and testing and inspection procedures to verify compliance and to facilitate
26、quality control. 2 References The titles of the standards publications referred to in this standard are listed on the inside back cover. 3 Definitions For the purposes of this British Standard the following definitions apply. 3.1 Types of pipes and fittings 3.1.1 normal suitable for drainage and sew
27、erage systems, other than where extra chemical resistance is required 3.1.2 surface water suitable only for the conveyance of surface water 3.1.3 extra chemically resistant suitable for drains and sewers where extra chemical resistance is required 3.1.4 ducts suitable for the enclosure and protectio
28、n of underground cables or other services 3.2 Other definitions 3.2.1 curvature the angle subtended by the length of a curved fitting at the centre of a circle of nominal radius through the centre-line of the fitting 3.2.2 joint assembly the adjacent ends of two pipes and the means of joining them 3
29、.2.3 pipe section a short length of pipe barrel equal to or greater than300mm 3.2.4 nominal size (DN) a numerical designation of the size of a unit, which is a convenient round number approximately equal to a manufacturing dimension NOTEFor the purposes of this standard, this dimension is the nomina
30、l bore of the pipe or fitting. 4 Materials and manufacture 4.1 Pipes and fittings. Pipes and fittings shall be made from suitable clays and when fired shall be sound and free from such defects as would impair their function when in service. Pipes and fittings may be unglazed, or glazed on the interi
31、or and/or exterior. When glazed, they need not be glazed on the jointing surfaces of the spigot and socket. Pipes and fittings marked as “Duct” shall not have sharp ends to the internal barrel. Fittings may be completed by affixing fired parts together. Fired fittings may be surface treated after fi
32、ring. They shall be deemed to comply with this standard provided that the completed fittings meet all the appropriate requirements specified in clauses 7 and 8. 4.2 Flexible mechanical joints 4.2.1 Each component shall be fabricated having regard to its individual function in such a way that the phy
33、sical performance of the joint assembly in service will be maintained. 4.2.2 Elastomeric joint rings shall satisfy the physical property and type test requirements of rings of type D (drainage) specified in BS2494.BS65:1991 2 BSI 02-1999 Section 2. Pipes 5 Dimensions and tolerances 5.1 Bore. The bor
34、e of the barrel of a pipe shall not deviate from the nominal size given in the first column of Table 1(a) or Table 1(b) beyond the limits of minimum and maximum shown. 5.2 Length. Preferred nominal lengths are not specified in this standard, but the limits of tolerance on the manufacturers stated no
35、minal length shall be: a) for normal pipes, extra chemically resistant pipes and ducts, 1%+4% subject to a minimum value of 5 mm; b) for surface water and perforated pipes, 2%+5% subject to a minimum value of 10mm. 5.3 Straightness. When tested in accordance with Appendix A, the permissible deviatio
36、n from straightness of the barrel of a pipe of any nominal bore shall not exceed that specified in Table 2. For intermediate lengths the permissible deviation from straightness shall be interpolated linearly. Table 1 Dimensions of barrels Table 2 Maximum permissible deviation from straightness (D s
37、) 6 Performance requirements 6.1 General. Pipes or pipe sections shall be sampled and tested in accordance with the requirements of the relevant clauses listed in Table 8. 6.2 Crushing strength. The pipe or pipe section, when tested in accordance with Appendix B, shall with-stand either the intensit
38、y of loading appropriate to its size and class, as stated in Table 3(a) or Table 3(b), or such higher intensity as is claimed by the manufacturer. NOTEThe sampling procedures set out in section 5 enable the crushing strength values given in Table 3(a) or Table 3(b) or claimed by the manufacturer to
39、be used in structural design. (a) Preferred nominal sizes Nominal size (DN) Limits of bore Normal pipes, extra chemically resistant pipes and ducts Surface water and perforated pipes min. max. min. max. mm mm mm mm 90 a 87 96 100 96 105 95 107 150 146 158 145 160 225 221 236 219 239 300 295 313 292
40、317 400 394 414 392 420 500 494 514 492 520 600 591 615 590 629 700 689 719 679 739 800 788 822 777 850 900 886 926 876 953 1000 984 1030 970 1050 a This size is for ducts only. (b) Non-preferred nominal sizes Nominal size (DN) Limits of bore Normal pipes, extra chemically resistant pipes and ducts
41、Surface water and perforated pipes min. max. min. max. mm mm mm mm 75 72 80 71 81 125 122 132 119 135 200 196 210 193 213 250 246 262 242 266 375 371 391 366 396 450 444 464 442 472 Nominal length of pipe L N Normal pipes, extra chemically resistant pipes and ducts Surface water and perforated pipes
42、 D s D s m mm mm 0.3 2 4 0.6 4 7 0.9 5 10 1.0 6 11 1.2 7 13 1.5 8 16 2.0 10 1.0% of nominal length 2.5 11 3.0 12 3.5 13 4.0 14 BS65:1991 BSI 02-1999 3 6.3 Bending moment resistance (BMR). The normal, surface water or extra chemically resistant pipe or pipe section, when tested in accordance with App
43、endix C, shall have either the bending moment resistance appropriate to its size and class, as stated in Table 4(a) or Table 4(b), or such higher resistance as is claimed by the manufacturer. NOTE Testing for bending moment resistance is applicable only to pipes up to and including DN225 with nomina
44、l lengths equal to or greater than 1.1m. Where the manufacturer claims a higher intensity of loading for crushing strength than specified in Table 3(a) or Table 3(b), then an appropriate higher bending moment resistance shall also be claimed by the manufacturer. 6.4 Impermeability. When subjected to
45、 the water pressure test described in Appendix D the barrels of normal and extra chemically resistant pipes or pipe sections shall withstand an internal water pressure of 60kPa 1)for 5min without leakage. 6.5 Chemical resistance. When subjected to the chemical resistance test described in Appendix E
46、, the mass loss of any specimen shall not exceed0.25%. NOTE Normal pipes and surface water pipes and ducts should be resistant to attack by chemicals likely to be found in waste water, surface water or ground water. Table 3 Crushing strength Table 4 Bending moment resistance Table 5 Maximum water ab
47、sorption 6.6 Tests for extra chemical resistance. When subjected to the tests described in Appendix F, extra chemically resistant pipes shall comply with the requirements specified in 6.6.1 and 6.6.2. 1) 1 kPa = 10 mbar = 1 kN/m 2 0.1 m head of water (conventional). (a) Preferred nominal sizes Nomin
48、al size (DN) Strength class a Standard strength Extra strength Super strength kN/m kN/m kN/m 90 20 22 28 100 20 22 28 150 20 22 28 225 20 25 28 300 22 29 34 400 39 44 52 500 40 48 60 600 40 57 70 700 40 67 81 800 40 72 86 900 40 84 106 1000 40 94 120 a See 6.2 regarding pipes and pipe sections of hi
49、gher strength. (b) Non-preferred nominal sizes Nominal size (DN) Strength class a Standard strength Extra strength kN/m kN/m 75 16 20 125 20 22 200 20 25 250 22 29 375 34 38 450 34 44 a See 6.2 regarding pipes and pipe sections of higher strength. (a) Preferred nominal sizes Nominal size (DN) Strength class a Standard strength Extra strength Super strength kNm kNm kNm 100 0.90 1.00 1.30 150 2.40 2.80 4.00 225 6.50 8.10 9.00 a See 6.3 regarding pipes and pipe sections of higher strength. (b) Non-pref
