1、BSI Standards PublicationDuctile iron fittings for PVC-U or PE piping systems Requirements and test methodsBS EN 12842:2012BS EN 12842:2012Incorporating corrigendum October 2013BS EN 12842:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 12842:2012. It super
2、sedes BS EN 12842:2000 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PSE/10, Iron pipes and fittings.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all th
3、e necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2013. Published by BSI Standards Limited 2013ISBN 978 0 580 84611 3ICS 23.040.40Compliance with a British Standard cannot confer immunity from legal obligations.This British Sta
4、ndard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2013.Amendments/corrigenda issued since publicationDate Text affected31 October 2013 National Annex addedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12842 August 2012 ICS 23.040.40 English Versi
5、on Ductile iron fittings for PVC-U or PE piping systems - Requirements and test methods Raccords en fonte ductile pour systmes de canalisations en PVC-U ou en PE - Prescriptions et mthodes dessai Duktile Gussformstcke fr PVC-U oder PE-Rohrleitungssyteme - Anforderungen und Prfverfahren This European
6、 Standard was approved by CEN on 23 June 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerni
7、ng such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into i
8、ts own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germ
9、any, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR
10、 NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12842:2012: EBS EN 12842:2012EN 12842:2012 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 53 Terms an
11、d definitions .54 Technical requirements 84.1 General 84.2 Dimensional requirements . 104.3 Material characteristics 124.4 Coatings . 134.5 Marking 144.6 Leak tightness . 145 Performance requirements for joints 145.1 General . 145.2 Leak tightness of flexible joints 155.3 Long term hydrostatic stren
12、gth test . 175.4 Flanged joints 196 Test methods . 196.1 Tensile testing for ductile iron 196.2 Brinell hardness for ductile iron . 206.3 Works leak tightness test 217 Performance tests. 217.1 Leak tightness of joints to internal hydrostatic pressure 217.2 Leak tightness of joints to negative intern
13、al pressure . 237.3 Leak tightness of joints to dynamic internal pressure . 247.4 Long term hydrostatic strength test for joints of fittings for PE pipes . 247.5 Pull out test at 25 C for restrained joints for PE pipes 257.6 Long term hydrostatic strength test for joints of fittings for PVC-U pipe 2
14、58 Tables of dimensions . 268.1 Dimensions of sockets for push-in flexible joints . 268.2 Dimensions of sockets for mechanical flexible joints 288.3 Dimensions of fittings 299 Evaluation of conformity 449.1 General . 449.2 Initial performance testing . 459.3 Factory production control (FPC) . 46Bibl
15、iography . 49BS EN 12842:2012EN 12842:2012 (E) 3 Foreword This document (EN 12842:2012) has been prepared by Technical Committee CEN/TC 203 “Cast 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
16、, either by publication of an identical text or by endorsement, at the latest by February 2013, and conflicting national standards shall be withdrawn at the latest by February 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.
17、CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12842:2000. The significant changes made since the previous version are as follows: a) Wording (relating to accessories, fittings, coupling and flange adaptor) modified in acco
18、rdance with EN 545; b) Improvement of shear load test for flange adapter and one socket fitting; c) Addition of aging test for PE pipe fittings and accessories. This European Standard was prepared in co-operation with CEN/TC 155 “Plastics piping systems“. This standard is in conformity with the gene
19、ral requirements 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
20、without restriction 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 these products remain in force. According to the CEN/CENELEC Interna
21、l Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Irel
22、and, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 12842:2012EN 12842:2012 (E) 4 1 Scope This European Standard specifies the requirements and associated test methods a
23、pplicable to ductile iron fittings, ductile iron and mild steel couplings and flange adaptors and their joints to be used with poly(vinyl chloride) (PVC-U) pipes or polyethylene (PE) pipes. It is in conformity with EN 1452-1 to -5, ENV 1452-6 and -7 and EN 12201-1 to -5 respectively, for the constru
24、ction of pipelines: to convey water (e.g. water intended for human consumption); with or without pressure; to be installed below or above ground, inside or outside buildings. This European Standard is not intended to cover sewerage applications, where additional requirements may be necessary. This E
25、uropean Standard is applicable to fittings which are: manufactured with socketed, flanged or spigot ends; supplied externally and internally coated; suitable for PE and PVC-U pipes with fluid temperatures between 0C and 25C, excluding frost, and for pressures up to 16 bar (PFA). For higher temperatu
26、res (up to 45C for PVC-U or 40C for PE) the PFA is derated as given in EN 1452 and EN 12201; not intended for use in areas subjected to reaction to fire regulations. NOTE 1 This does not preclude special arrangements for the products to be used at higher temperatures. Temperature limitations and pre
27、ssure limitations are those coming from the PVC-U or PE pipes. This European Standard covers ductile iron fittings, couplings and flange adaptors cast by any type of foundry process or manufactured by fabrication of cast components, as well as corresponding joints, in a size range extending from DN
28、60 to DN 700, to be used with pipes of external diameter from 63 mm to 710 mm. As long as no equivalent European Standard exists for mild steel accessories, this European Standard also covers couplings and flange adaptors for use with PVC-U and PE pipes which are fabricated partly or entirely from m
29、ild steel as well as corresponding joints, in a size range extending from DN 60 to DN 700, to be used with pipes of external diameter from 63 mm to 710 mm. This European Standard specifies requirements for materials, dimensions and tolerances, mechanical properties and standard coatings. It also giv
30、es minimum performance requirements for all components, including restrained and non-restrained flexible joints. Joint design and gasket shapes are outside the scope of this standard. This European Standard does not cover fittings, couplings and flange adaptors intended to be used with different pip
31、e materials other than PVC-U and PE. NOTE 2 Fittings, couplings and flange adaptors complying with the requirements of this European Standard for PVC-U also usually meet the requirements for PVC-O and PVC-A pipes. Where this is not the case, the manufacturer is expected to declare this in the releva
32、nt literature. NOTE 3 In this European Standard, all pressures are relative pressures, expressed in bars (100 kPa = 1 bar). BS EN 12842:2012EN 12842:2012 (E) 5 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for i
33、ts application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 681-1, Elastomeric seals Material requirements for pipe joint seals used in water and drainage applications Part 1: Vulca
34、nised rubber EN 805:2000, Water supply Requirements for systems and components outside buildings EN 1092-2, Flanges and their joints Circular flanges for pipes, valves, fittings and accessories, PN designated Part 2: Cast iron flanges EN 10025-1:2004, Hot rolled products of structural steels General
35、 technical delivery conditions EN 10310, Steel tubes and fittings for onshore and offshore pipelines Internal and external polyamide powder based coatings EN 14901, Ductile iron pipes, fittings and accessories Epoxy coating (heavy duty) of ductile iron fittings and accessories Requirements and test
36、methods EN 15189, Ductile iron pipes, fittings and accessories External polyurethane coating for pipes Requirements and test methods EN 15655, Ductile iron pipes, fittings and accessories Internal polyurethane lining for pipes and fittings Requirements and test methods EN ISO 1167-1:2006, Thermoplas
37、tics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 1: General method (ISO 1167-1:2006) EN ISO 4016, Hexagon head bolts Product grade C (ISO 4016) EN ISO 4034, Hexagon nuts Product grade C (ISO 4034) EN ISO 6506-1, Metallic mater
38、ials Brinell hardness test Part1: Test method (ISO 6506-1) EN ISO 7091, Plain washers Normal series Product grade C (ISO 7091) EN ISO 9001:2008, Quality management systems Requirements (ISO 9001:2008) EN ISO 13846:2000, Plastic piping systems End-load-bearing and non-end-load-bearing assemblies and
39、joints for thermoplastics pressure piping Test method for long-term leaktightness under internal water pressure (ISO 13846:2000) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 ductile iron cast iron used for fittings in which graphite is pre
40、sent substantially in spherodal form 3.2 fitting casting other than a pipe which allows pipeline deviation, change of direction or bore BS EN 12842:2012EN 12842:2012 (E) 6 SOURCE: EN 545 3.3 flange end of a fitting or flange adaptor extending perpendicular to its axis, with bolt holes equally spaced
41、 on a circle Note 1 to entry: A flange can be fixed (e.g. integrally cast or welded) or adjustable; an adjustable flange comprises a ring, in one or several parts assembled together, which bears on an end joint hub and can be freely rotated around the axis before jointing. 3.4 spigot male end of a p
42、ipe or fitting 3.5 socket female end of a pipe or fitting to make the connection with the spigot of the next component 3.6 gasket sealing component of a joint 3.7 joint connection between the ends of two components in which a gasket is used to effect a seal 3.8 flexible joint joint which permits sig
43、nificant angular deflection both during and after installation and which can accept a slight offset of the centreline 3.9 push-in flexible joint flexible joint assembled by pushing the spigot through the gasket in the socket of the mating component 3.10 mechanical flexible joint flexible joint in wh
44、ich sealing is obtained by applying pressure to the gasket by mechanical means, e.g. a gland 3.11 restrained flexible joint flexible joint in which a means is provided to prevent separation of the assembled joint 3.12 flanged joint joint between two flanged ends 3.13 nominal size DN/OD alphanumeric
45、designation of size for components of a pipework system, which is used for reference purposes Note 1 to entry: 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
46、. Note 2 to entry: Adapted from EN ISO 6708:1995, definition 2.1. Note 3 to entry: Plastic pipes are only defined as DN/OD. BS EN 12842:2012EN 12842:2012 (E) 7 3.14 nominal outside diameter (dn) specified outside diameter, in millimetres, assigned to a nominal size DN/OD SOURCE: EN 12201-1 3.15 mini
47、mum socket inside diameter (di min) minimum value of the internal diameter of the socket mouth 3.16 nominal pressure PN alphanumerical designation, which comprises a convenient rounded number used for reference purposes Note 1 to entry: All components of the same nominal size, DN, designated by the
48、same PN have compatible mating dimensions. Note 2 to entry: Adapted from EN 1333:2006. Note 3 to entry: In EN 1452 and EN 12201, the term nominal pressure (PN) at 20C is used in place of PFA. 3.17 allowable operating pressure (PFA) maximum hydrostatic pressure that a component is capable of withstan
49、ding continuously in service SOURCE: EN 805:2000 Note 1 to entry: In EN 1452 and EN 12201, the term nominal pressure (PN) at 20C is used in place of PFA. 3.18 leak tightness test pressure pressure applied to a component during manufacture in order to ensure its leak tightness 3.19 allowable maximum operating pressure (PMA) maximum pressure occurring from time
