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1、BRITISH STANDARD BS EN 545:2006 Ductile iron pipes, fittings, accessories and their joints for water pipelines Requirements and test methods The European Standard EN 545:2006 has the status of a British Standard ICS 23.040.10; 23.040.40 BS EN 545:2006 This British Standard was published under the au
2、thority of the Standards Policy and Strategy Committee on 29 December 2006 BSI 2006 ISBN 0 580 49821 2 National foreword This British Standard was published by BSI. It is the UK implementation of EN 545:2006. It supersedes BS EN 545:2002 which is withdrawn. The UK participation in its preparation wa
3、s entrusted to Technical Committee PSE/10, Iron pipes and fittings. A list of organizations represented on PSE/10 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. C
4、ompliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComments W - - - - - - - - - - - - - - - - - 7- - -$ * - - $ - $ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - W W D - - w - - - - EN 545:2006 (E) 2 C
5、ontents Foreword4 Introduction.5 1 Scope 6 2 Normative references6 3 Terms and definitions .7 4 Technical requirements 9 4.1 General9 4.2 Dimensional requirements11 4.3 Material characteristics.15 4.4 Coatings and linings for pipes.16 4.5 Coatings for fittings and accessories18 4.6 Marking of pipes
6、and fittings19 4.7 Leak tightness20 5 Performance requirements for joints.20 5.1 General20 5.2 Flexible joints.20 5.3 Restrained flexible joints 22 5.4 Flanged joints.22 5.5 Pipes with screwed or welded flanges23 6 Test methods24 6.1 Pipe dimensions 24 6.2 Straightness of pipes 25 6.3 Tensile testin
7、g25 6.4 Brinell hardness.27 6.5 Works leak tightness test for pipes and fittings.27 6.6 Zinc mass .28 6.7 Thickness of paint coatings .29 6.8 Thickness of cement mortar lining29 7 Performance test methods .29 7.1 Compressive strength of the cement mortar lining.29 7.2 Leak tightness of flexible join
8、ts to positive internal pressure30 7.3 Leak tightness of flexible joints to negative internal pressure.30 7.4 Leak tightness of flexible push-in joints to positive external pressure.31 7.5 Leak tightness of flexible joints to dynamic internal pressure.31 7.6 Leak tightness and mechanical resistance
9、of flanged joints32 7.7 Leak tightness and mechanical resistance of screwed and welded flanges 32 8 Tables of dimensions33 8.1 Socket and spigot pipes .33 8.2 Flanged pipes.35 8.3 Fittings for socketed joints.35 8.4 Fittings for flanged joints51 Annex A (normative) Allowable pressures .72 A.1 Genera
10、l72 A.2 Socket and spigot pipes (see 8.1)72 A.3 Fittings for socketed joints (see 8.3) .73 A.4 Flanged pipes (see 8.2) and fittings for flanged joints (see 8.4).73 Annex B (informative) Longitudinal bending resistance of pipes75 Annex C (informative) Diametral stiffness of pipes.76 Annex D (informat
11、ive) Alternative pipe coatings, field of use, characteristics of soils.78 D.1 Alternative pipe coatings78 EN 545:2006 (E) 3 D.2 Field of use, characteristics of soils79 Annex E (informative) Field of use, water characteristics 80 Annex F (informative) Quality assurance81 F.1 General81 F.2 Performanc
12、e tests .81 F.3 Manufacturing process.81 Annex G (informative) Calculation method of buried pipelines, heights of cover .83 G.1 Calculation method .83 G.2 Heights of cover.85 Bibliography87 EN 545:2006 (E) 4 Foreword This document (EN 545:2006) has been prepared by Technical Committee CEN/TC 203 “Ca
13、st iron pipes, fittings and their joints”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2007, and conflicting national standards shall be withdraw
14、n at the latest by May 2007. This document supersedes EN 545:2002. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, Fr
15、ance, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 545:2006 (E) 5 Introduction This standard is in conformity with the general requirement
16、s already established by CEN/TC 164 in the field of water supply. In respect of potential adverse effects on the quality of water intended for human consumption, caused by the product covered by this standard: this standard provides no information as to whether the product may be used without restri
17、ction in any of the member states of the EU or EFTA; it should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force. EN 545:2006 (E) 6 1 Scope This European Standard spe
18、cifies the requirements and associated test methods applicable to ductile iron pipes, fittings, accessories and their joints for the construction of pipelines: to convey water (e. g. potable water); with or without pressure; to be installed below or above ground. This standard is applicable to pipes
19、, fittings and accessories which are: manufactured with socketed, flanged or spigot ends; normally delivered externally and internally coated; suitable for fluid temperatures between 0 C and 50 C, excluding frost. This standard covers pipes, fittings and accessories cast by any type of foundry proce
20、ss or manufactured by fabrication of cast components, as well as corresponding joints, in a size range extending from DN 40 to DN 2 000, inclusive. This standard specifies requirements for materials, dimensions and tolerances, mechanical properties and standard coatings of ductile iron pipes and fit
21、tings. It also gives performance requirements for all components including joints. Joint design and gasket shapes are outside the scope of this standard. NOTE In this standard, all pressures are relative pressures, expressed in bars (100 kPa = 1 bar). 2 Normative references The following referenced
22、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. EN 196-1, Methods of testing cement Part 1: Determination of strength EN 1
23、97-1, Cement Part 1: Composition, specifications and conformity criteria for common cements EN 681-1, Elastomeric seals Materials requirements for pipe joint seals used in water and drainage applications Part 1: Vulcanized rubber EN 805, Water supply Requirements for systems and components outside b
24、uildings EN 1092-2, Flanges and their joints Circular flanges for pipes, valves, fittings and accessories, PN designated Part 2: Cast iron flanges EN 10002-1, Metallic materials Tensile testing Part 1: Method of test at ambient temperature EN ISO 4016, Hexagon head bolts Product grade C (ISO 4016:19
25、99) EN ISO 4034, Hexagon nuts Product grade C (ISO 4034:1999) EN ISO 6506-1, Metallic materials Brinell hardness test Part 1: Test method (ISO 6506-1:2005) EN ISO 7091, Plain washers Normal series Product grade C (ISO 7091:2000) EN 545:2006 (E) 7 3 Terms and definitions For the purposes of this docu
26、ment, the following terms and definitions apply. 3.1 ductile iron cast iron used for pipes, fittings and accessories in which graphite is present substantially in spheroidal form 3.2 pipe casting of uniform bore, straight in axis, having socket, spigot or flanged ends, except for flanged-socket piec
27、es, flanged-spigot pieces and collars which are classified as fittings 3.3 fitting casting other than a pipe which allows pipeline deviation, change of direction or bore NOTE flanged-socket pieces, flanged spigot pieces and collars are also classified as fittings 3.4 accessory any casting other than
28、 a pipe or fitting which is used in a pipeline; NOTE 1 for example: glands and bolts for mechanical flexible joints (see 3.13); glands, bolts and locking rings for restrained flexible joints (see 3.14); pipe saddles for service cock connections; adjustable flanges and flanges to be welded or screwed
29、. NOTE 2 Valves of all types are not covered by the term accessory. 3.5 flange flat circular end of a pipe or fitting extending perpendicular to its axis, with bolt holes equally spaced on a circle NOTE A flange can be fixed (e.g. integrally cast or welded) or adjustable; an adjustable flange compri
30、ses a ring, in one or several parts assembled together, which bears on an end joint hub and can be freely rotated around the pipe axis before jointing. 3.6 spigot male end of a pipe or fitting 3.7 spigot end maximum insertion depth of the spigot plus 50 mm 3.8 socket female end of a pipe or fitting
31、to make the connection with the spigot of the next component 3.9 gasket sealing component of a joint 3.10 joint connection between the ends of two pipes and/or fittings in which a gasket is used to effect a seal EN 545:2006 (E) 8 3.11 flexible joint joint which permits significant angular deflection
32、 both during and after installation and which can accept a slight offset of the centreline 3.12 push-in flexible joint flexible joint assembled by pushing the spigot through the gasket in the socket of the mating component 3.13 mechanical flexible joint flexible joint in which sealing is obtained by
33、 applying pressure to the gasket by mechanical means, e.g. a gland 3.14 restrained flexible joint flexible joint in which a means is provided to prevent separation of the assembled joint 3.15 flanged joint joint between two flanged ends 3.16 nominal size (DN) alphanumerical designation of size for c
34、omponents of a pipework system, which is used for reference purposes. It comprises the letters DN followed by a dimensionless whole number which is indirectly related to the physical size, in millimetres, of the bore or outside diameter of the end connections EN ISO 6708:1995 3.17 nominal pressure (
35、PN) alphanumerical designation used for reference purposes related to a combination of mechanical and dimensional characteristics of a component of a pipework system. It comprises the letters PN followed by a dimensionless number EN 1333:2006 NOTE All equipment of the same nominal size DN designated
36、 by the same PN number have compatible mating dimensions. 3.18 leak tightness test pressure pressure applied to a component during manufacture in order to ensure its leak tightness 3.19 allowable operating pressure (PFA) maximum hydrostatic pressure that a component is capable of withstanding contin
37、uously in service EN 805:2000 3.20 allowable maximum operating pressure (PMA) maximum pressure occurring from time to time, including surge, that a component is capable of withstanding in service EN 805:2000 3.21 allowable test pressure (PEA) maximum hydrostatic pressure that a newly installed compo
38、nent is capable of withstanding for a relatively short duration, in order to insure the integrity and tightness of the pipeline EN 545:2006 (E) 9 EN 805:2000 NOTE This test pressure is different from the system test pressure (STP), which is related to the design pressure of the pipeline and is inten
39、ded to ensure its integrity and leak tightness ; see also A.1. 3.22 diametral stiffness of a pipe characteristic of a pipe which allows it to resist ovalization under loading when installed 3.23 performance test proof of design test which is done once and is repeated only after change of design 3.24
40、 length effective length of a pipe or fitting, as shown on Figure 4 for pipes and on Figures 5 to 21 for fittings NOTE For flanged pipes and fittings, the effective length L (l for branches) is equal to the overall length. For socketed pipes and fittings, the effective length LU (lu, for branches),
41、is equal to the overall length minus the maximum spigot insertion depth as given in the manufacturers catalogues. 3.25 deviation design Iength allowance with respect to the standardized length of a pipe or a fitting 3.26 ovality out of roundness of a pipe section; NOTE it is equal to: 21 21 100 AA A
42、A (1) where: A1 is the maximum axis, in millimetres; A2 is the minimum axis, in millimetres. 4 Technical requirements 4.1 General 4.1.1 Ductile iron pipes and fittings Nominal sizes, thickness classes, lengths and coatings are specified in 4.1.1, 4.2.1, 4.2.3, 4.4 and 4.5 respectively. When, by agre
43、ement between manufacturer and purchaser, pipes and fittings with different wall thickness classes, lengths and/or coatings and other types of fittings than those given in 8.3 and 8.4, are supplied with reference to this standard, they shall comply with all the other requirements of this standard. N
44、OTE 1 Other types of fittings include angle branches, tees and tapers with other combinations DN x dn, draining tees, The standardized nominal sizes DN of pipes and fittings are as follows: (see EN 805) 40, 50, 60, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600, 700, 800, 900, 1 000, 1 100, 1 200, 1 400, 1 500, 1 600, 1 8