1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 12327:2012Gas infrastructure Pressuretesting, commissioning anddecommissioning procedures Functional requirementsBS EN 12327:2012 BRITISH STANDARDNational forewordThis Brit
2、ish Standard is the UK implementation of EN 12327:2012. Itsupersedes BS EN 12327:2000 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee GSE/33, Gas supply.A list of organizations represented on this committee can beobtained on request to its secretary.Thi
3、s 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 68894 2ICS 91.140.40Compliance with a British Standard cannot confer imm
4、unity 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 12327:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12327 August 2012 ICS 91.140.4
5、0 Supersedes EN 12327:2000English Version Gas infrastructure - Pressure testing, commissioning and decommissioning procedures - Functional requirements Infrastructures gazires - Essais de pression, modes opratoires de mise en service et de mise hors service des rseaux - Prescriptions fonctionnelles
6、Gasinfrastruktur - Druckprfung, In- und Auerbetriebnahme - Funktionale Anforderungen 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 status of a n
7、ational 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, German). A
8、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, Croatia, Cypru
9、s, 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 United King
10、dom. 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 12327:2012: EBS EN
11、12327:2012EN 12327:2012 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 53 Terms and definitions .53.1 General terminology 63.2 Pressure related terminology .74 Pressure testing .84.1 General .84.2 Classification of test methods .94.3 Hydrostatic testing 104.3.1 General
12、104.3.2 Hydrostatic test methods . 104.3.3 Water disposal . 114.4 Pneumatic testing 114.4.1 General 114.4.2 Pneumatic test methods 114.5 Leak detection . 124.6 Test report 125 Commissioning and decommissioning 135.1 General/planning 135.2 Commissioning 145.3 Decommissioning 15Annex A (informative) P
13、urging criteria . 16Annex B (informative) List of CEN/TC 234 European Standards 19BS EN 12327:2012EN 12327:2012 (E) 3 Foreword This document (EN 12327:2012) has been prepared by Technical Committee CEN/TC 234 “Gas infrastructure”, the secretariat of which is held by DIN. This European Standard shall
14、 be given the status of a national standard, 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 doc
15、ument may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12327:2000. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bo
16、und 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, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portug
17、al, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 12327:2012EN 12327:2012 (E) 4 Introduction There is a complete suite of functional standards prepared by CEN/TC 234, “Gas infrastructure“ to cover all parts of the gas infrastructure from the point of i
18、nput of gas to the transmission system up to the inlet connection of the gas appliances, whether for domestic, commercial or industrial purposes. In addition, a new EN Work Item is being prepared by CEN/TC 234/WG 10, “Gas Service Lines“. In preparing this European Standard a basic understanding of g
19、as supply by the user has been assumed. Gas infrastructures are complex and the importance on safety of their construction and use has led to the development of very detailed codes of practice and operating manuals in the member countries. These detailed statements embrace recognized standards of ga
20、s engineering and the specific requirements imposed by the legal structures of the member countries. BS EN 12327:2012EN 12327:2012 (E) 5 1 Scope This European Standard describes common principles for pressure testing, commissioning and decommissioning of gas infrastructures as covered by the functio
21、nal European Standards of the Technical Committee CEN/TC 234, see Annex B. They have been extracted from the detailed codes of practice and operating manuals in the member countries. This European Standard does not cover installation pipework which is covered by EN 1775. The specified procedures are
22、 applicable to strength testing, tightness testing and combined testing. Test pressure levels, test periods and acceptance criteria are not covered by this European Standard. Additional measures or different methods of testing, commissioning or decommissioning can be required by legislation of the i
23、ndividual member countries or at the discretion of the pipeline operator. 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 countri
24、es. This European Standard is intended to be applied 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
25、 this European Standard, the national legislation/regulation should take 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 nationa
26、l contact point for the latest information. 2 Normative references 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
27、the referenced document (including any amendments) applies. EN 837-1, Pressure gauges Part 1: Bourdon tube pressure gauges Dimensions, metrology, requirements and testing EN 837-2, Pressure gauges Part 2: Selection and installation recommendations for pressure gauges EN 837-3, Pressure gauges Part 3
28、: Diaphragm and capsule pressure gauges Dimensions, metrology, requirements and testing 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. BS EN 12327:2012EN 12327:2012 (E) 6 3.1 General terminology 3.1.1 gas infrastructure pipeline systems includin
29、g pipework and their associated stations or plants for the transmission and distribution of gas 3.1.2 authorized person competent person who is appointed to fulfil a given task on gas infrastructure 3.1.3 competent person person who is trained, experienced and approved to perform activities relating
30、 to gas infrastructures Note 1 to entry: Means of approval, if any, will be determined within each member country. 3.1.4 competent authority body authorized by the member country to ensure that the pipeline operator fulfils the requirements of this and other relevant standards 3.1.5 pipeline operato
31、r private or public organization authorized to design, construct and/or operate and maintain the gas infrastructure 3.1.6 pipework assembly of pipes and fittings 3.1.7 pipeline system of pipework with all associated equipment and stations up to the point of delivery Note 1 to entry: This pipework is
32、 mainly below ground but includes also aboveground parts. 3.1.8 point of delivery point of a gas network where the gas is transferred to the user Note 1 to entry: This can be at a means of isolation (e.g. at the outlet of a LPG storage vessel) or at a meter connection. Note 2 to entry: For this Euro
33、pean Standard, the point of delivery is typically nominated by the distribution system operator and may be defined in National Regulations or Codes of Practice. 3.1.9 strength test specific procedure to verify that the pipework and/or station meets the requirements for mechanical strength 3.1.10 tig
34、htness test specific procedure to verify that the pipework and/or station meets the requirements for tightness 3.1.11 combined test specific procedure to verify that the pipework and/or station meets the requirements for mechanical strength and tightness BS EN 12327:2012EN 12327:2012 (E) 7 3.1.12 lo
35、wer explosive limit LEL concentration of flammable gas or vapour in air, below which the gas atmosphere is not explosive 3.1.13 commissioning activities required to pressurise pipework, stations, equipment and assemblies with gas and to put them into operation 3.1.14 decommissioning activities requi
36、red to take out of service any pipework, station, equipment or assemblies filled with gas and to disconnect them from the system 3.1.15 purging process for safely removing air or inert gas from pipework and/or pipeline components and replacing it with gas, or the reverse process Note 1 to entry: A d
37、istinction is made between the following methods: direct purging is the displacement of air by gas or vice versa; indirect purging is the displacement of air by inert gas followed by the displacement by gas or vice versa. Note 2 to entry: Alternatively by means of a barrier (a slug of inert gas or a
38、 pig) between the air and the gas or vice versa. 3.2 Pressure related terminology 3.2.1 design pressure DP pressure on which design calculations are based 3.2.2 operating pressure OP pressure which occurs within a system under normal operating conditions 3.2.3 maximum operating pressure MOP maximum
39、pressure at which a system can be operated continuously under normal operating conditions Note 1 to entry: Normal operating conditions are: no fault in any device or stream. 3.2.4 maximum incidental pressure MIP maximum pressure which a system can experience during a short time, limited by the safet
40、y devices BS EN 12327:2012EN 12327:2012 (E) 8 4 Pressure testing 4.1 General 4.1.1 The implementation of the requirements for pressure testing shall be performed by an authorized person. 4.1.2 The pressure of a strength test or combined test shall be higher than the maximum incidental pressure (MIP)
41、 of the system. The pressure of the tightness test, which will normally be carried out after the strength test, can be below the MIP of the system. The tightness test pressure shall be at least the operating pressure of the system where no previous strength test has been carried out, as in the case
42、of: short extensions of existing pipework; and connections between new and existing systems, where joints are exposed for testing. All pressure levels are gauge pressures (relative pressures) measured at the prevailing atmospheric pressure. 4.1.3 A written procedure shall be prepared by the pipeline
43、 operator or competent authority, taking into account local conditions, national legislation, standards and/or codes of practice, and shall specify the following: test method; test pressure; test period; test medium; acceptance criteria; allowable pressure/volume variation; minimum pressure in the e
44、xisting gas infrastructure; leak detection methods; release of test medium; disposal of water. 4.1.4 The test method and pressure level to be applied in each case depends on the materials used, the type of joints, the intended application and the provisions of the relevant functional standards for g
45、as infrastructures (see Annex B). 4.1.5 The maximum allowable pressure/volume variation depends on the material, pressure level, diameter and the location of the test section. 4.1.6 The effects of atmospheric pressure variations and/or temperature variations, particularly where a part of the test se
46、ction is not completely buried, shall be taken into account. 4.1.7 When plastic material is being tested, consideration should be given to creep effects during pressurization and testing. EXAMPLE Polyethylene. BS EN 12327:2012EN 12327:2012 (E) 9 4.1.8 The pressure level shall be verified using press
47、ure measurement equipment of minimum accuracy class 0,6 with a maximum measurement range between 1,1 to 1,5 times the test pressure. A recording device of accuracy class 1 may be used, if appropriate. A check shall be made to verify that the complete test section is pressurized. To take into account
48、 temperature changes affecting the test pressure, the temperature can be measured with an instrument having a minimum scale reading of 1 C. 4.1.9 Measuring instruments shall comply with appropriate standards or specifications and shall have valid certificates of calibration. Pressure gauges shall co
49、mply with EN 837-1, EN 837-2 and EN 837-3, where applicable. 4.1.10 The test equipment shall be capable of withstanding the specified test pressure. 4.1.11 Care shall be taken not to over-pressurize the test section beyond the specified test pressure level. 4.1.12 Suitable precautions shall be taken in order to avoid potential hazards to persons and to the environment. 4.1.13 As far as possible pipework should be buried, however, if pipework is exposed, it shall be adequately sec
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