1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 12007-4:2012Gas infrastructure Pipelinesfor maximum operatingpressure up to and including 16barPart 4: Specific functional requirements forrenovationBS EN 12007-4:2012 BRIT
2、ISH STANDARDNational forewordThis British Standard is the UK implementation of EN 12007-4:2012.It supersedes BS EN 12007-4:2000 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee GSE/33, Gas supply.A list of organizations represented on this committee can
3、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 0 580 68893 5ICS 75.200Compliance wi
4、th 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 12007-4:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISC
5、HE NORM EN 12007-4 August 2012 ICS 23.040.01 Supersedes EN 12007-4:2000English Version Gas infrastructure - Pipelines for maximum operating pressure up to and including 16 bar - Part 4: Specific functional requirements for renovation Infrastructures gazires - Canalisations pour pression maximale de
6、service infrieure ou gale 16 bar - Partie 4: Prescriptions fonctionnelles spcifiques pour la rnovationGasinfrastruktur - Rohrleitungen mit einem maximal zulssigen Betriebsdruck bis einschlielich 16 bar - Teil 4: Spezifische funktionale Anforderungen fr die Sanierung This European Standard was approv
7、ed 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 status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national stan
8、dards 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 its own language and n
9、otified 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, Germany, Greece, Hungary,
10、 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 NORMUNG Management C
11、entre: 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 12007-4:2012: EBS EN 12007-4:2012EN 12007-4:2012 (E) 2 Contents Page Foreword 41 Scope 52 Normative references 53 Terms and definitions .
12、54 Design 74.1 General .74.2 Pressure uprating 74.3 Selection of renovation technique .74.4 Consultation with third parties 85 Construction 85.1 General .85.2 Disconnection/reconnection of sections of the gas infrastructure .95.3 Excavation and no dig techniques 95.4 Laying 95.4.1 Laying of pipework
13、 .95.4.2 Cleaning of carrier pipe . 105.4.3 Inspection of the pipework to be renovated 106 Pressure testing . 107 Service line transfer . 108 Commissioning and decommissioning 109 Record system 11Annex A (informative) Chart of renovation techniques 12Annex B (informative) Advantages and disadvantage
14、s of renovation techniques . 13Annex C (informative) Renovation with continuous or discrete pipe . 16C.1 Definition . 16C.2 Description 16C.3 Conditions of application . 16C.4 Implementation . 17C.4.1 Preparation 17C.4.2 Execution . 17Annex D (informative) Lining with close-fit pipe . 20D.1 Definiti
15、on 20D.2 Description 20D.3 Conditions of application 20D.4 Implementation . 21D.4.1 Materials . 21D.4.2 Preparation 21D.4.3 Execution . 21Annex E (informative) Lining with cured-in-place pipe 23E.1 Definition . 23E.2 Description 23E.3 Conditions of application . 23E.4 Implementation . 23E.4.1 Prepar
16、ation 23E.4.2 Execution . 24BS EN 12007-4:2012EN 12007-4:2012 (E) 3 Annex F (informative) Renovation by bursting or splitting existing pipe . 25F.1 Definition 25F.2 Description . 25F.3 Conditions of application . 25F.4 Implementation 25F.4.1 Preparation . 25F.4.2 Execution 26Annex G (informative) Re
17、novation by the pulling or pushing of the existing pipe 27G.1 Definition 27G.2 Description . 27G.3 Conditions of application . 27G.4 Implementation 27G.4.1 Preparation . 27G.4.2 Execution 27Annex H (informative) Joint repairs 29H.1 Definition 29H.2 Description . 29H.3 Conditions of application . 29H
18、.3.1 General . 29H.3.2 Internal methods 29H.3.3 External methods Commissioned pipework 30H.4 Implementation 30H.4.1 Internal repairs 30H.4.2 External repairs Commissioned pipework 31H.5 Testing . 31H.6 Commissioning . 32Annex I (informative) Resin lining . 33I.1 Definition 33I.2 Description . 33I.3
19、Conditions of application . 33I.4 Implementation 33I.4.1 Preparation . 33I.4.2 Execution 33I.4.3 Testing . 34I.4.4 Commissioning . 34Annex J (informative) Technical changes between this European Standard and EN 12007-4:2000 . 35Bibliography 36BS EN 12007-4:2012EN 12007-4:2012 (E) 4 Foreword This doc
20、ument (EN 12007-4:2012) 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
21、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. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent ri
22、ghts. This document supersedes EN 12007-4:2000. Annex J 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:
23、General 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 lines1Accor
24、ding to 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,
25、 Greece, 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 12007-4:2012EN 12007-4:2012 (E) 5 1 Scope This European Standard des
26、cribes specific functional requirements for the renovation of pipework in existing gas infrastructures. This European Standard is intended to be applied with the requirements of EN 12007-1. This European Standard does not apply to pipework in above ground installations. This European Standard covers
27、 the various renovation technologies for gas piping in the range of sizes covering gas mains and gas service lines and is intended to be applied in association with EN 12007-1. Certain pipe networks originally for other purposes can be considered for renovation technologies to make them suitable for
28、 gas infrastructure. This European Standard specifies common basic principles 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
29、in association with these national standards and/or codes of practice setting 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/reg
30、ulation takes precedence as illustrated in CEN/TR 13737 (all parts). CEN/TR 13737 (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 ref
31、erences The following documents, in whole or in part, are normatively referenced 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.
32、 EN 12007-1, Gas infrastructure Pipelines for maximum operating pressure up to and including 16 bar Part 1: General functional recommendations EN 12007-2, Gas infrastructure Pipelines for maximum operating pressure up to and including 16 bar Part 2: Specific functional recommendations for polyethyle
33、ne (MOP up to and including 10 bar) EN 12007-3, Gas supply systems Pipelines for maximum operating pressure up to and including 16 bar Part 3: Specific functional recommendations for steel EN 12327, Gas infrastructure Pressure testing, commissioning and decommissioning procedures Functional requirem
34、ents 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. BS EN 12007-4:2012EN 12007-4:2012 (E) 6 3.1 gas infrastructure pipeline systems including pipework and their associated stations or plants for the transmission and distribution of gas 3.2 pipel
35、ine operator private or public organization authorized to design, construct and/or operate and maintain the gas infrastructure 3.3 competent person person who is trained, experienced and approved to perform activities relating to gas infrastructures Note 1 to entry: Means of approval, if any, will b
36、e determined within each country. 3.4 gas main pipework in a gas infrastructure to which service lines are connected 3.5 pipework assembly of pipes and fittings 3.6 station plant or facility for the operation and/or processing of gas infrastructures 3.7 service line transfer act of switching over th
37、e service line connection from the old pipe to the new one 3.8 pressure uprating activities pertaining to the increase of the operating pressure beyond the existing maximum operating pressure level of a gas infrastructure 3.9 commissioning activities required to pressurize pipework, stations, equipm
38、ent and assemblies with the gas and to put them into operation 3.10 decommissioning activities required to take out of service any pipework, stations, equipment and assemblies filled with gas and to disconnect them from the system 3.11 renovation method by which the characteristics of the gas infras
39、tructure are improved by re-using the existing structure or installing a new structure in its place 3.12 carrier pipe existing pipework in which a renovation system is installed Note 1 to entry: The carrier pipe can be either a conduit pipe or a support pipe. BS EN 12007-4:2012EN 12007-4:2012 (E) 7
40、3.13 support pipe existing pipe which remains the gas carrying pipe and remains a structural integral part of the pressure system after lining 3.14 sleeve purposely installed length of protective pipe through which a gas pipe passes 3.15 conduit pipe pipe through which a gas pipe is inserted without
41、 necessarily providing support 3.16 annular space space enclosed between the carrier pipe and the new pipe when the latter is inserted inside 3.17 close fit after reshaping and relaxation, outer surface of the inserted pipe is in close contact with the internal surface of the old pipe 4 Design 4.1 G
42、eneral Choice of renovation techniques to be used on pipework, up to and including 16 bar, shall be made by a competent person. The selection of materials, dimensions and assembling techniques shall be the responsibility of the pipeline operator and comply with EN 12007-1. Further guidance on the de
43、sign of polyethylene (PE) pipelines of gas infrastructure is given in EN 12007-2. Further guidance on the design of steel pipelines of gas infrastructure is given in EN 12007-3. The uprating of renovated systems is the responsibility of the pipeline operator and shall conform to the relevant procedu
44、re. The Maximum Operating Pressure (MOP) of a renovated system shall be limited by the weakest point of the system. 4.2 Pressure uprating Renovation of a gas infrastructure can be a part of a strategy plan for uprating the maximum operating pressure. Some renovation techniques lead to a reduction in
45、 diameter of the pipe, so that an increase in pressure is required to maintain the flow capacity of the system. Up rating of MOP is the responsibility of the pipeline operator. The pipeline operator shall ensure that all pipeline components are capable of withstanding, in strength and tightness, the
46、 new pressure level. 4.3 Selection of renovation technique The following factors shall be considered when selecting a renovation technique. These include but are not limited to: the future structure of the distribution network; BS EN 12007-4:2012EN 12007-4:2012 (E) 8 the pressure level at which the
47、pipework will operate after renovation; the required capacity of the pipework; the number of gas service lines connected to the section of pipework; the presence and number of branches, bends, valves; the current condition of the pipework to be renovated; the position of the pipework; EXAMPLE 1 The
48、covering depth of the pipework. EXAMPLE 2 Disruption to traffic and pedestrians. EXAMPLE 3 The location of adjacent plant. EXAMPLE 4 Areas sensitive to break phenomena. the number, type and condition of pipe joints in the section of pipework; any supply obligations to consumers during and after reno
49、vation works. NOTE 1 There is a range of renovation techniques use. These are described generally in Annex A. Annex A does not represent an exhaustive list of available techniques. NOTE 2 The advantages and disadvantages of the techniques described in Annex A are outlined in Annex B. Further details of the different techniques are given in Annexes C to Annex I. 4.
