1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 12007-2:2012Gas infrastructure Pipelinesfor maximum operatingpressure up to and including 16barPart 2: Specific functional requirements forpolyethylene (MOP up to and inclu
2、ding 10bar)BS EN 12007-2:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 12007-2:2012.It supersedes BS EN 12007-2:2000 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee GSE/33, Gas supply.A list of organizations
3、represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0
4、580 68891 1ICS 75.200Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 August 2012.Amendments issued since publicationDate Text affectedBS EN 12007-2:2012EUROPEAN
5、 STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12007-2 August 2012 ICS 23.040.20 Supersedes EN 12007-2:2000English Version Gas infrastructure - Pipelines for maximum operating pressure up to and including 16 bar - Part 2: Specific functional requirements for polyethylene (MOP up to and including 10 ba
6、r)Infrastructures gazires - Canalisations pour pression maximale de service infrieure ou gale 16 bar - Partie 2: Exigences fonctionnelles spcifiques pour le polythylne (MOP infrieure ou gale 10 bar) Gasinfrastruktur - Rohrleitungen mit einem maximal zulssigen Betriebsdruck bis einschlielich 16 bar -
7、 Teil 2: Spezifische funktionale Anforderungen fr Polyethylen (MOP bis einschlielich 10 bar) This European Standard was approved by CEN on 24 May 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the statu
8、s of a national standard without any alteration. Up-to-date lists and bibliographical references concerning 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, Ger
9、man). A version in any other language made by translation under the responsibility of a CEN member into its 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, Croati
10、a, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and Uni
11、ted Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR 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 12007-2:201
12、2: EBS EN 12007-2:2012EN 12007-2:2012 (E) 2 Contents Page Foreword 41 Scope 52 Normative references 53 Terms, definitions, symbols and abbreviations .64 Design .74.1 General 74.2 Materials and components .74.3 Maximum operating pressure .74.3.1 General 74.3.2 Verification of the overall service (des
13、ign) coefficient 84.3.3 Verification of the RCP criterion 84.4 Assembly techniques . 104.5 Material properties for flow stopping by squeeze-off . 104.6 Pipework inside buildings . 105 Construction 105.1 Storage, handling and transportation. 105.2 Jointing 115.2.1 General . 115.2.2 Fusion jointing 11
14、5.2.3 Mechanical joints 125.3 Laying 125.4 Connection to existing systems 135.4.1 Static electricity 135.4.2 Squeeze-off 136 Quality control . 146.1 Inspection prior to installation 146.2 Inspection during laying 146.2.1 Laying 146.2.2 Joint integrity 147 Pressure testing 14Annex A (informative) Sto
15、rage, handling and transportation 16A.1 General . 16A.2 Storage . 16A.2.1 Storage conditions . 16A.2.2 Bundles 16A.2.3 Stacking loose straight pipes 17A.2.4 Drums and coils 17A.2.5 Storing . 17A.2.6 First in first out 18A.3 Handling . 18A.3.1 General . 18A.3.2 Handling in cold weather . 18A.3.3 Stra
16、ight pipes 18A.3.4 Coils . 18A.3.5 Drums . 18A.3.6 Uncoiling 19A.4 Transportation . 19A.4.1 Straight pipes 19BS EN 12007-2:2012EN 12007-2:2012 (E) 3 A.4.2 Coiled pipe . 19A.4.3 Drums . 19Annex B (informative) Fusion joint integrity 20B.1 General . 20B.2 Visual inspection criteria 20B.2.1 General . 2
17、0B.2.2 Butt fusion guidelines for the visual examination of butt fusion joints 20B.2.3 Electrofusion 23B.2.4 Ancillary tooling 26Annex C (informative) Technical changes between this European Standard and EN 12007-2:2000 27Bibliography 28BS EN 12007-2:2012EN 12007-2:2012 (E) 4 Foreword This document
18、(EN 12007-2:2012) has been prepared by Technical Committee CEN/TC 234 “Gas infrastructure”, the secretariat of which is held by DIN. 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 February 2013,
19、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. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights.
20、This document supersedes EN 12007-2:2000. Annex C provides details of significant technical changes between this European Standard and the previous edition. EN 12007 Gas infrastructure Pipelines for maximum operating pressure up to and including 16 bar consists of the following parts: Part 1: Genera
21、l functional requirements Part 2: Specific functional requirements for polyethylene (MOP up to and including 10 bar)Part 3: Specific functional requirements for steel Part 4: Specific functional requirements for renovation Part 5: Specific functional recommendations of new service lines1According to
22、 the CEN/CENELEC Internal Regulations, the national standards organizations 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
23、, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. 1To be published. BS EN 12007-2:2012EN 12007-2:2012 (E) 5 1 Scope This European Standard describes
24、the specific functional requirements for polyethylene (PE) pipelines in addition to the general functional requirements of EN 12007-1 for: a) a maximum operating pressure (MOP) up to and including 10 bar; b) an operating temperature between -20 C and +40 C. This European Standard covers three types
25、of pipe: PE pipes including any identification stripes; PE pipes with co-extruded layers on either or both the outside and/or inside of the pipe; PE pipes with a peelable, contiguous thermoplastics additional layer on the outside of the pipe. This European Standard specifies common basic principles
26、for gas infrastructure. Users of this European Standard should be aware that more detailed national standards and/or code of practice may exist in the CEN member countries. This European Standard is intended to be applied in association with these national standards and/or codes of practice setting
27、out the above-mentioned basic principles. In the event of conflicts in terms of more restrictive requirements in national legislation/regulation with the requirements of this European Standard, the national legislation/regulation takes precedence as illustrated in CEN/TR 13737 (all parts). CEN/TR 13
28、737 (all parts) give: clarification of all legislations/regulations applicable in a member state; if appropriate, more restrictive national requirements; a national contact point for the latest information. 2 Normative references The following documents, in whole or in part, are normatively referenc
29、ed in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1555-1, Plastics piping systems for the supply of gaseous fuels Polyethyle
30、ne (PE) Part 1: General EN 1555-2, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 2: Pipes EN 1555-3, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 3: Fittings EN 1555-4, Plastics piping systems for the supply of gaseous fuels Polyethy
31、lene (PE) Part 4: Valves EN 1555-5, Plastics piping systems for the supply of gaseous fuels Polyethylene (PE) Part 5: Fitness for purpose of the system EN 12327, Gas infrastructure Pressure testing, commissioning and decommissioning procedures Functional requirements BS EN 12007-2:2012EN 12007-2:201
32、2 (E) 6 ISO 12176-1, Plastics pipes and fittings Equipment for fusion jointing polyethylene systems Part 1: Butt fusion ISO 12176-2, Plastics pipes and fittings Equipment for fusion jointing polyethylene systems Part 2: Electrofusion 3 Terms, definitions, symbols and abbreviations For the purposes o
33、f this document, the following terms, definitions, symbols and abbreviations apply. 3.1 nominal outside diameter dnspecified outside diameter 3.2 nominal wall thickness ennumerical designation of the wall thickness of a component, which is a convenient round number, approximately equal to the manufa
34、cturing dimension in millimetres 3.3 standard dimension ratio SDR number approximately equal to the quotient of the nominal outside diameter and the nominal wall thickness 3.4 maximum operating pressure MOP maximum pressure at which a system can be operated continuously under normal operating condit
35、ions Note 1 to entry: Normal operating conditions are: no fault in any device or stream. 3.5 maximum incidental pressure MIP maximum pressure which a system can experience during a short time limited by the safety devices 3.6 butt fusion joint method of jointing PE pipes and fittings where the two p
36、ipe ends are heated and brought together to be fused without the use of a separate fitting or filler material 3.7 electrofusion joint method of jointing PE pipes, using fittings which have an integrated electric heating element 3.8 squeeze-off act of squeezing a pipe to prevent the flow of gas 3.9 m
37、inimum required strength MRS value of the lower confidence limit rounded down to the next lower value of the R10 series when the lower confidence limit is below 10 MPa, or to the next lower value of the R20 series when the lower confidence limit is 10 MPa or greater BS EN 12007-2:2012EN 12007-2:2012
38、 (E) 7 Note 1 to entry: R10 and R20 series are the Renard number series conforming to ISO 3 and ISO 497. 3.10 lower confidence limit LCL quantity, expressed in MPa, which can be considered as a material property, representing the 97,5 % lower confidence limit of the predicted long term hydrostatic s
39、trength for water at 20 C for 50 years 3.11 critical rapid crack propagation pressure PRCPpressure level at which a rapid crack propagation (RCP) can occur in a PE pipeline, defined at a reference temperature Note 1 to entry: Reference temperature is 0 C. 3.12 peelable pipe PE pipes with a peelable,
40、 contiguous thermoplastics additional layer on the outside of the pipe for the purpose of marking and colour identification and intended to be removed for the purposes of making welds or fusing pipe and fittings 4 Design 4.1 General The PE 80 an PE 100 products are covered by CEN/TC 155, Plastics pi
41、ping systems and ducting systems. Purchasing products to CEN standards can be part of a quality programme to ensure the safety and integrity of gas systems over their design life in service. Developments in the gas market have required new kinds of PE pipe products in addition to the original PE 80
42、and PE 100 materials. EXAMPLE New products include thinner wall pipes for renovation and products for trenchless techniques applications. The selection of materials, SDR series, dimensions and assembling techniques shall be the responsibility of the pipeline operator. 4.2 Materials and components PE
43、 materials and components used shall comply with EN 1555-1, EN 1555-2, EN 1555-3, EN 1555-4 and EN 1555-5. Other components not covered by EN 1555-1, EN 1555-2, EN 1555-3, EN 1555-4 and EN 1555-5 shall conform to the relevant European Standards and International Standards or, in their absence, to na
44、tional or other established standards and shall be fit for their purpose. 4.3 Maximum operating pressure 4.3.1 General The MOP should be selected on the basis of the gas infrastructure operating requirements provided that the MOP does not exceed 10 bar and the conditions in 4.3.2 and 4.3.3 are satis
45、fied. BS EN 12007-2:2012EN 12007-2:2012 (E) 8 4.3.2 Verification of the overall service (design) coefficient The overall service (design) coefficient C shall be calculated using the formula as given below and in Figure 1 shall be greater than or equal to 2. This coefficient C takes into consideratio
46、n service conditions as well as the properties and components of a pipeline. F120DSDRMOPMRSC)(All pressures measured in bar. NOTE Derating factor (DF) is a coefficient used in the calculation of MOP which takes into account the influence of operating temperature. Derating factors are listed in EN 15
47、55-5. 4.3.3 Verification of the RCP criterion The ratio of critical RCP pressure to MOP shall be greater than or equal to 1,5. The RCP criterion is the critical pressure, is dependent on pipe size and material, and shall be determined in accordance with EN 1555-2. The critical RCP pressure is based
48、on a temperature of 0 C. Where pipe temperature decreases below 0 C the PROP/MOP ratio should be recalculated in accordance with EN 1555-5 using a value of RCP pressure determined from the minimum expected operating temperature of the pipe. The value of MOP should be reduced so as to maintain the PR
49、CP/MOP ratio at a value greater than or equal to 1,5. See Figure 1. BS EN 12007-2:2012EN 12007-2:2012 (E) 9 Key P pressure levels; PRCP critical rapid crack propagation pressure; STPmax maximum strength test pressure; STPmin minimum strength test pressure; MIP maximum incidental pressure; MOP maximum operating pressure. System design F120DSDRCMRSMOP)(1,5RCPPMOP Pressure testing 1201,
