1、BS EN 969:2009ICS 23.040.10; 23.040.40NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDDuctile iron pipes,fittings, accessoriesand their joints forgas pipelines Requirements and testmethodsThis British Standardwas published under theauthority of the StandardsPoli
2、cy and StrategyCommittee on 30 April2009 BSI 2009ISBN 978 0 580 58604 0Amendments/corrigenda issued since publicationDate CommentsBS EN 969:2009National forewordThis British Standard is the UK implementation of EN 969:2009. Itsupersedes BS EN 969:1996 which is withdrawn.The UK participation in its p
3、reparation was entrusted to TechnicalCommittee PSE/10, Iron pipes and fittings.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correc
4、t application.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 969:2009EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 969March 2009ICS 23.040.10; 23.040.40 Supersedes EN 969:1995 English VersionDuctile iron pipes, fittings, accessories and their joints for gas
5、pipelines - Requirements and test methodsTuyaux, raccords et accessoires en fonte ductile et leursassemblages pour canalisations de gaz - Prescriptions etmthodes dessaiRohre, Formstcke, Zuberhrteile aus duktilem Gusseisenund ihre Verbindungen fr Gasleitungen - Anforderungenund PrfverfahrenThis Europ
6、ean Standard was approved by CEN on 10 February 2009.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references con
7、cerning such nationalstandards may be obtained on application to the CEN 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 translationunder the responsibility of a CEN member into its own
8、 language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
9、 Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rig
10、hts of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 969:2009: EBS EN 969:2009EN 969:2009 (E) 2 Contents Page Foreword 51 Scope 62 Normative references 63 Terms and definitions .74 Technical requirements 94.1 General 94.1.1 Ductile iron pipes and fi
11、ttings 94.1.2 Surface condition and repair . 104.1.3 Types of joints and interconnection . 104.2 Dimensional requirements . 114.2.1 Wall thickness . 114.2.2 Diameter . 124.2.3 Length 124.2.4 Straightness of pipes . 144.3 Material characteristics 144.3.1 Tensile properties . 144.3.2 Hardness 144.4 Co
12、atings and linings for pipes 154.4.1 General . 154.4.2 External coating of zinc with finishing layer 164.5 Coatings for fittings and accessories. 164.5.1 General . 164.5.2 Paint coatings . 174.6 Marking of pipes and fittings . 174.7 Leak tightness . 185 Performance requirements for joints 185.1 Gene
13、ral . 185.2 Flexible joints 185.2.1 General . 185.2.2 Test conditions . 195.2.3 Test parameters 195.3 Restrained flexible joints . 205.4 Flanged joints as cast, screwed, welded and adjustable . 206 Test methods . 216.1 Pipe dimensions . 216.1.1 Wall thickness . 216.1.2 External diameter 216.1.3 Inte
14、rnal diameter . 216.1.4 Length 216.2 Straightness of pipes . 226.3 Tensile testing . 226.3.1 Samples . 226.3.2 Preparation of test bar . 226.3.3 Apparatus and test method . 236.3.4 Test results 246.4 Brinell hardness 246.5 Works leak tightness test for pipes and fittings 246.5.1 General . 246.5.2 Ce
15、ntrifugally cast pipes . 24BS EN 969:2009EN 969:2009 (E) 3 6.5.3 Pipes not centrifugally cast and fittings . 256.6 Zinc mass . 256.7 Thickness of paint coatings . 267 Performance test methods . 267.1 Leak tightness of flexible joints to positive internal pressure . 267.2 Leak tightness of flexible p
16、ush-in joints to positive external pressure 277.3 Leak tightness and mechanical resistance of flanged joints . 288 Tables of dimensions 288.1 Socket and spigot pipes . 288.2 Flanged pipes 298.2.1 General . 298.2.2 Centrifugally cast pipes with welded flanges . 308.2.3 Centrifugally cast pipes with s
17、crewed flanges 308.2.4 Pipes with integrally cast flanges 308.3 Fittings for socketed joints 308.3.1 General . 308.3.2 Flanged sockets 308.3.3 Flanged spigots . 318.3.4 Collars 328.3.5 Double socket 90 (1/4) bends . 338.3.6 Double socket 45 (1/8) bends . 338.3.7 Double socket 2230 (1/16) bends 348.3
18、.8 Double socket 1115 (1/32) bends 358.3.9 All socket tees . 368.3.10 Double socket tees with flanged branch, DN 40 to DN 250 . 388.3.11 Double socket tees with flanged branch, DN 300 to DN 600. 408.3.12 Double socket tapers 418.4 Fittings for flanged joints . 438.4.1 Double flanged 90 (1/4) bends 4
19、38.4.2 Double flanged duckfoot 90 (1/4) bends 438.4.3 Double flanged 45 (1/8) bends 458.4.4 Double flanged 2230 (1/16) bends . 468.4.5 Double flanged 1115 (1/32) bends . 468.4.6 All-flanged tees, DN 40 to DN 250 478.4.7 All-flanged tees, DN 300 to DN 600 498.4.8 Double flanged tapers . 508.4.9 Blank
20、 flanges PN 10 518.4.10 Blank flanges PN 16 518.4.11 Reducing flanges PN 10 528.4.12 Reducing flanges PN 16 539 Evaluation of conformity 549.1 General . 549.2 Initial performance testing . 549.2.1 General . 549.2.2 Characteristics . 549.2.3 Treatment of calculated values and design 549.2.4 Sampling,
21、 testing and conformity criteria 559.3 Factory production control (FPC) 559.3.1 General . 559.3.2 FPC requirements for all manufacturers. 569.3.3 Manufacturer-specific FPC system requirements . 58Annex A (normative) Longitudinal bending resistance of pipes . 60Annex B (normative) Diametral stiffness
22、 of pipes 61Annex C (informative) Field of use, characteristics of soils . 63Annex D (informative) Calculation method of buried pipelines, heights of cover . 64D.1 Calculation method . 64BS EN 969:2009EN 969:2009 (E) 4 D.1.1 Calculation formula 64D.1.2 Pressure from earth loading 64D.1.3 Pressure fr
23、om traffic loading . 65D.1.4 Bedding factor, K 65D.1.5 Factor of lateral pressure, f . 65D.1.6 Modulus of soil reaction, E . 65D.2 Heights of cover 66Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives . 67ZA.1 Scope and rel
24、evant characteristics 67ZA.2 Procedure for attestation of conformity of ductile iron pipes, fittings, accessories and their joints for gas applications. . 69ZA.2.1 System of attestation of conformity . 69ZA.2.2 Declaration of conformity 69ZA.3 CE marking and labelling . 70Bibliography . 73BS EN 969:
25、2009EN 969:2009 (E) 5 Foreword This document (EN 969:2009) 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, either by publication of an
26、 identical text or by endorsement, at the latest by September 2009, and conflicting national standards shall be withdrawn at the latest by December 2010. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not
27、 be held responsible for identifying any or all such patent rights. This document supersedes EN 969:1995. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of the EU Constructi
28、on Products Directive (89/106/EEC). This European Standard is in conformity with the general requirements already established by CEN/TC 165 “Waste water engineering“ in the field of sewerage. Annex ZA includes the requirements of the mandate given under the EU Construction Products Directive (89/106
29、/EEC). Only if the requirements specified in Annex ZA are met, the CE marking will be effected. For reasons of conformity with mandate M/131 “Pipes, tanks and ancillaries not in contact with water intended for human consumption”, EN 969 has been revised by extension with Annex ZA (see Resolution CEN
30、/BT 113/1994 and CEN/BT 63/1996) and Clause 9 for the evaluation of conformity. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmar
31、k, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 969:2009EN 969:2009 (E) 6 1 Scope This European Standard
32、specifies the requirements and associated test methods applicable to ductile iron pipes, fittings, accessories and their joints used for the construction of pipelines outside buildings: to convey air or combustible gases (e.g. natural gas or town gas) at pressures up to 16 bar; to be installed below
33、 or above ground. NOTE 1 A combustible gas is a gas or any fuel that is in gaseous state at a temperature of 15 C at a pressure of 1 bar. This European Standard applies to pipes, fittings and accessories which are: manufactured with socketed, flanged or spigot ends; normally delivered externally and
34、 internally coated; suitable for gas temperatures between 15 C and 50 C. This European Standard covers pipes, fittings and accessories 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 40 to DN 60
35、0 inclusive. This European Standard specifies requirements for materials, dimensions and tolerances, mechanical properties and standard coatings of ductile iron pipes and fittings. It also gives performance requirements for all components including joints. Joint design and gasket shape are outside t
36、he scope of this European Standard. NOTE 2 In this European Standard, all pressures are relative pressures expressed in bars (100 kPa = 1 bar). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cit
37、ed applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 545:2006, Ductile iron pipes, fittings, accessories and their joints for water pipelines Requirements and test methods EN 681-1, Elastomeric seals Material requirements for pipe j
38、oint seals used in water and drainage applications Part 1: Vulcanized rubber EN 682, Elastomeric seals Material requirements for seals used in pipes and fittings carrying gas and hydrocarbon fluids EN 1092-2, Flanges and their joints Circular flanges for pipes, valves, fittings and accessories, PN d
39、esignated 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 4016:1999) EN ISO 4034, Hexagon nuts Product grade C (ISO 4034:1999) EN ISO 6506-1, Metallic materials Brinell hardnes
40、s test Part 1: Test method (ISO 6506-1:2005) EN ISO 7091, Plain washers Normal series Product grade C (ISO 7091:2000) BS EN 969:2009EN 969:2009 (E) 7 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply. 3.1 ductile iron cast iron used for pip
41、es, fittings and accessories in which graphite is present substantially in spheroidal form 3.2 pipe casting of uniform bore, straight in axis, having either socket, spigot or flanged ends, except for flanged socket pieces, flanged spigot pieces and collars which are classified as fittings 3.3 fittin
42、g casting other than a pipe which allows pipeline deviation, change of direction or bore; in addition flanged socket pieces, flanged spigot pieces and collars are also classified as fittings 3.4 accessory any casting other than a pipe or fitting which is used in a pipeline, for example: glands and b
43、olts for mechanical flexible joints (see 3.13) glands, bolts and locking rings for restrained flexible joints (see 3.14) pipe saddles for service cock connection adjustable flanges and flanges to be welded or screwed-on NOTE Valves of all types are not covered by the term accessory. 3.5 flange flat
44、circular end of a pipe or fitting extending perpendicular to its axis, with bolt holes equally spaced on a circle NOTE A flange may 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 hub an
45、d can freely rotate around the barrel 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 to make the connection with the spigot of the next component 3.9 gasket sealing component of
46、 a joint BS EN 969:2009EN 969:2009 (E) 8 3.10 joint connection between the ends of two pipes and/or fittings in which a gasket is used to effect a seal 3.11 flexible joint joint which permits significant angular deflection both during and after installation and which can accept a slight offset of th
47、e 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 applying pressure to the gasket by mechanical means, e.g. a gland 3.14 restra
48、ined 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 components of a pipework system, which is used for reference purposes. It comprises the letters DN followed by a dimensionless whole n
