1、BS EN 16726:2015Gas infrastructure Quality ofgas Group HBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN 16726:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 16726:2015.BSI, as a member of CEN, is obliged to publish EN
2、 16726:2015 as a British Standard. However, attention is drawn to the fact that during the development of this European Standard, the UK committee voted against its approval as a European Standard.The UK committee voted against the adoption of EN 16726:2015 due to concerns with the specification in
3、EN 16726:2015 relating to elemental components in natural gas. The UK committee cannot be sure how appliances currently in operation would perform if subject to a variation in gas specification. Furthermore, the committee is concerned about the potential costs of converting some 30 million gas appli
4、ances to burn any new gas safely and efficiently without detailed research. Installed gas appliances have been designed to be safe and to operate efficiently within historic UK gas specifications. The gas quality required for safe operation of gas appliances installed in the UK was stipulated in the
5、 Gas Safety (Management) Regulations 1996 (Statutory Instrument 1996 No. 551).The UK committee also had concerns about the legal framework of the standard, specifically the European Commissions proposal to amend the Interoperability and Data Exchange Code in 2016 to implement EN 16726:2015 by EU reg
6、ulation. In view of the committees concerns and bi-lateral gas supply commitments, the UK committee is considering the CEN/CENELEC internal regulations Part 3, relating to A-deviations and Special National Conditions. Further details about the UK committees concerns can be found in National Annex NA
7、.Owing to widespread objections from the Member States after the Formal Vote, the EC subsequently withdrew their requirement to implement EN 16726 in the Interoperability and Data Exchange Code. At EC request, the European gas transportation stakeholders group ENTSOG conducted an Impact Analysis on
8、various options for implementing EN 16726:2015, in which the UK participated fully. ENTSOG has recommended that the Interoperability Code should not be amended to make EN 16726:2015 a binding provision. Work continues at CEN on finding a European Agreement on Wobbe Index and the UK committee reserve
9、s its position on A-deviations and Special National Conditions. The results of the now completed Oban Trial, which covers some 1100 existing customers and gases with an extended range of Wobbe Index, will inform this debate (https:/www.sgn.co.uk/Oban/).The UK participation in its preparation was ent
10、rusted to Technical Committee GSE/33, Gas supply.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British S
11、tandards Institution 2017. Published by BSI Standards Limited 2017ISBN 978 0 580 83966 5ICS 75.060Compliance with a British Standard cannot confer immunity from legal obligations.BS EN 16726:2015BRITISH STANDARDThis British Standard was published under the authority of the Standards Policy and Strat
12、egy Committee on 30 April 2017.Amendments/corrigenda issued since publicationDate Text affectedThis page deliberately left blankBS EN 16726:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16726 December 2015 ICS 75.060 English Version Gas infrastructure - Quality of gas - Group H Infrastruc
13、ture gazire - Qualit du gaz - Groupe H Gasinfrastruktur - Beschaffenheit von Gas - Gruppe HThis European Standard was approved by CEN on 24 October 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the sta
14、tus 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, G
15、erman). 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, Croa
16、tia, 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 U
17、nited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No.
18、EN 16726:2015 EBS EN 16726:2015EN 16726:2015 (E) 2 Contents Page European foreword . 3 Introduction 4 1 Scope 5 2 Normative references 5 3 Terms and definitions . 5 4 Reference conditions and pressure units . 6 5 Requirements . 6 Annex A (normative) Calculation of methane number of gaseous fuels for
19、 engines . 9 A.1 Introduction 9 A.2 Calculation of methane number 9 A.3 Example 1: 2H-gas 10 A.4 Example 2: enriched biomethane . 16 A.5 Example 3: 2H-gas with hydrogen addition 17 Annex B (informative) Sulfur 31 B.1 General . 31 B.2 Total sulfur from Odorants . 31 Annex C (informative) Water dew po
20、int and hydrocarbon dew point 35 C.1 Water dew point . 35 C.2 Hydrocarbon dew point . 35 Annex D (informative) Background for not including a Wobbe Index range into this standard 36 D.1 General . 36 D.2 A common European Wobbe index range . 38 Annex E (informative) Hydrogen - Admissible Concentratio
21、ns in natural gas systems 39 Annex F (informative) Sampling 40 Annex G (informative) Adeviations 41 Bibliography . 46 BS EN 16726:2015EN 16726:2015 (E) 3 European foreword This document (EN 16726:2015) has been prepared by Technical Committee CEN/TC 234 “Gas infrastructure”, the secretariat of which
22、 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 June 2016, and conflicting national standards shall be withdrawn at the latest by June 2016. Attention is drawn to the possibility
23、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. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Associat
24、ion. The need for a European Standard concerning the specification of the quality of gases of group H is derived from the mandate M/400 issued to CEN by the European Commission. According to this mandate the goal is to define specifications that are as wide as possible within reasonable costs. This
25、means that the specifications enhance the free flow of gas within the internal EU market, in order to promote competition and security of supply minimizing the negative effects on gas infrastructure and gas networks, efficiency and the environment and allow appliances to be used without compromising
26、 safety. Some requirements specified in this European Standard, Clause 5, cannot be applied in Germany, Hungary and the Netherlands due to existing conflicting national legislation. The related A-Deviations are listed in Annex G. According to the CEN-CENELEC Internal Regulations, the national standa
27、rds 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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Lux
28、embourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 16726:2015EN 16726:2015 (E)BS EN 16726:2015EN 16726:2015 (E) 2 Contents Page European foreword . 3 Introduction 4 1 Scope 5 2 Normative references 5 3
29、Terms and definitions . 5 4 Reference conditions and pressure units . 6 5 Requirements . 6 Annex A (normative) Calculation of methane number of gaseous fuels for engines . 9 A.1 Introduction 9 A.2 Calculation of methane number 9 A.3 Example 1: 2H-gas 10 A.4 Example 2: enriched biomethane . 16 A.5 Ex
30、ample 3: 2H-gas with hydrogen addition 17 Annex B (informative) Sulfur 31 B.1 General . 31 B.2 Total sulfur from Odorants . 31 Annex C (informative) Water dew point and hydrocarbon dew point 35 C.1 Water dew point . 35 C.2 Hydrocarbon dew point . 35 Annex D (informative) Background for not including
31、 a Wobbe Index range into this standard 36 D.1 General . 36 D.2 A common European Wobbe index range . 38 Annex E (informative) Hydrogen - Admissible Concentrations in natural gas systems 39 Annex F (informative) Sampling 40 Annex G (informative) Adeviations 41 Bibliography . 46 BS EN 16726:2015EN 16
32、726:2015 (E) 3 European foreword This document (EN 16726:2015) 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
33、endorsement, at the latest by June 2016, and conflicting national standards shall be withdrawn at the latest by June 2016. 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 identi
34、fying any or all such patent rights. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. The need for a European Standard concerning the specification of the quality of gases of group H is derived from the mandate M/400 iss
35、ued to CEN by the European Commission. According to this mandate the goal is to define specifications that are as wide as possible within reasonable costs. This means that the specifications enhance the free flow of gas within the internal EU market, in order to promote competition and security of s
36、upply minimizing the negative effects on gas infrastructure and gas networks, efficiency and the environment and allow appliances to be used without compromising safety. Some requirements specified in this European Standard, Clause 5, cannot be applied in Germany, Hungary and the Netherlands due to
37、existing conflicting national legislation. The related A-Deviations are listed in Annex G. 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, Croatia, Cyprus, Cz
38、ech 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 the United Kingd
39、om. BS EN 16726:2015EN 16726:2015 (E)BS EN 16726:2015EN 16726:2015 (E) 4 Introduction This European standard sets requirements for gas quality with the aim to allow the free flow of gas between the CEN member states and to enable the security of supply taking into account the impact on the whole val
40、ue chain from gas production and supply to end uses. However, at the moment of publication of this European standard, a common Wobbe Index range cannot be defined because of different regulations in CEN Member States and limited knowledge of the influence of broadening Wobbe Index range on integrity
41、, efficiency and safe use of appliances in some countries (see Annex D). In order to find a common Wobbe Index range, further studies, such as the Gas Quality Harmonization Implementation Pilot, are necessary. The Wobbe Index should be defined when the pending results of these studies are available.
42、 The common Wobbe Index range should be implemented in a revised standard in due time. For hydrogen, at present it is not possible to specify a limiting value which would generally be valid for all parts of the European gas infrastructure (see Annex E). Responsibility and liability issues in the con
43、text of this European standard are subject to European or national regulations. BS EN 16726:2015EN 16726:2015 (E) 5 1 Scope This European standard specifies gas quality characteristics, parameters and their limits, for gases classified as group H that are to be transmitted, injected into and from st
44、orages, distributed and utilized. NOTE For information on gas families and gas groups see EN 437. This European standard does not cover gases conveyed on isolated networks. For biomethane, additional requirements indicated in prEN 16723-1 apply. 2 Normative references The following documents, in who
45、le 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. EN ISO 13443, Natural gas - Standard r
46、eference conditions (ISO 13443) EN ISO 14532, Natural gas - Vocabulary (ISO 14532) ISO 14912, Gas analysis Conversion of gas mixture composition data 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN ISO 14532 and the following apply. 3.1 isolated netwo
47、rk network where transmission, distribution and utilization of gas are combined and which is physically unconnected to other networks 3.2 entry point point at which gas enters a gas distribution or gas transmission system 3.3 interconnection point physical point connecting adjacent entry-exit system
48、s or connecting an entry-exit system with an interconnector SOURCE: Commission Regulation (EU) No 984/2013, modified 3.4 maximum operating pressure maximum pressure at which a network can be operated continuously under normal conditions expressed as absolute pressure Note 1 to entry: Normal conditio
49、ns are: no fault in any device or stream. SOURCE: EN 1594:2013, 3.23, modified BS EN 16726:2015EN 16726:2015 (E)BS EN 16726:2015EN 16726:2015 (E) 4 Introduction This European standard sets requirements for gas quality with the aim to allow the free flow of gas between the CEN member states and to enable the security of supply taking into account the impact on the whole value chain from gas production and supply to end uses. However, at the moment of publication of this European standard, a common Wobbe Index range cannot be defined because of different regulat
