1、May 2016 English price group 31No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 75.180.30This standard has been incl
2、uded in the body of DVGW Technical Rules.!%SMEnglish version EN 1776:2015,English translation of DIN EN 1776:2016-05Gasinfrastruktur Gasmesssysteme Funktionale Anforderungen;Englische Fassung EN 1776:2015,Englische bersetzung von DIN EN 1776:2016-05Infrastructures gazires Systmes de mesure de gaz Pr
3、escriptions fonctionnelles;Version anglaise EN 1776:2015,Traduction anglaise de DIN EN 1776:2016-05SupersedesDIN EN 1776:1999-06www.beuth.deDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.Document comprises 90 pages 04.16 DIN EN 177
4、6:2016-052A comma is used as the decimal marker. Start of application The start of application of this standard is 2016-05-01. National foreword This document (EN 1776:2015) has been prepared by Technical Committee CEN/TC 234 “Gas infrastructure” (Secretariat: DIN, Germany). The responsible German b
5、ody involved in its preparation was DIN-Normenausschuss Gastechnik (DIN Standards Committee Gas Technology), Working Committee NA 032-02-05 AA Gasmessung. This European Standard specifies functional requirements for the design, construction, testing, commissioning/decommissioning, operation, mainten
6、ance and, where appropriate, calibration, together with suitable documented provisions for all new gas measuring systems and any major changes of existing systems that are used for custody transfer. This European Standard is applicable for gases of the 2nd family as classified in EN 437. It is also
7、applicable for treated non-conventional combustible gases complying with EN 437 and for which a detailed technical evaluation of the functional requirements (such as injected biomethane) is performed ensuring there are no other constituents or properties of the gases that can affect the integrity of
8、 the measuring system. This European Standard gives guidelines when designing, installing and operating gas meters with additional functionalities (smart gas meters). Unless otherwise specified, all pressures used in this European Standard are gauge pressures. Communication protocols and interfaces
9、for gas meters and remote reading of gas meters are outside the scope of this European Standard and are covered by the appropriate parts of EN 13757, which provide a number of protocols for meter communications. Users of this standard should also note that the procedures for taking gas pipelines out
10、 of operation or putting them into operation are governed by national regulations and technical rules. In Germany, these are BGR 500 Chapter 2.31 “German trade association rules for working on gas lines” and DVGW Code of Practice G 600 (DVGW-TRGI). National regulations and technical rules for taking
11、 gas pipelines out of operation or putting them into operation are to be observed when interrupting the gas supply (see 7.6.5) as an additional functionality: German national regulations and technical rules require the on-site presence of a specialist when gas pipelines are “taken out of operation”
12、or “disabled”. The additional functionality of interrupting the gas supply as described in this document can be used for prepayment systems. In this case the checking function and quality are to be as after a “short-term interruption” to ensure a minimum level of safety. Note: The connected gas appl
13、iances shall have safety pilots and at least a type “BS” gas monitoring. As regards the requirements listed under 7.6.5 “Gas meter with remotely operated valve”, item b), only points 2) and 3) are used in Germany. This standard has been developed with the consensus of the DVGW Deutscher Verein des G
14、as- und Wasser-faches e.V. (German Technical and Scientific Association for Gas and Water). It is intended to include this standard in the body of DVGW Technical Rules. DIN EN 1776:2016-05 3Amendments This standard differs from DIN EN 1776:1999-06 as follows: a) the standard has been restructured an
15、d editorially revised; b) the scope has been extended to include the design, construction, testing, commissioning/decommissioning, operation, maintenance and, where appropriate, calibration of gas measuring systems for residential use and in light industry. Previous editions DIN EN 1776: 1999-06 -DI
16、N EN 1776:2016-05 4 National Annex NA (informative) Bibliography DIN EN ISO 6141, Gas analysis Contents of certificates for calibration gas mixtures DIN EN ISO 6142, Gas analysis Preparation of calibration gas mixtures Gravimetric method DIN EN ISO 6143, Gas analysis Comparison methods for determini
17、ng and checking the composition of calibration gas mixtures DIN EN ISO 6975, Natural gas Extended analysis Gas-chromatographic method DIN EN ISO 10715, Natural gas Sampling guidelines DIN EN ISO 10723, Natural gas Performance evaluation for analytical systems EUROPEAN STANDARD NORME EUROPENNE EUROPI
18、SCHE NORM EN 1776 December 2015 ICS 75.180.30 Supersedes EN 1776:1998English Version Gas infrastructure - Gas measuring systems - Functional requirements Infrastructures gazires - Systmes de mesure de gaz - Prescriptions fonctionnelles Gasinfrastruktur - Gasmesssysteme - Funktionale Anforderungen Th
19、is European Standard was approved by CEN on 10 October 2015. 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 refer
20、ences 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 version in any other language made by translation under the responsibility of a CEN
21、 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia
22、, France, Germany, Greece, Hungary, 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 EUROPISC
23、HES 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. EN 1776:2015 EEN 1776:2015 (E) 2 Contents Page European foreword . 5 Introduction 6 1 Scope 7
24、 2 Normative references 8 3 Terms and definitions . 9 4 General requirements 14 4.1 General . 14 4.2 Safety and environment . 14 4.3 Quality system for gas measuring system . 15 5 Basic requirements for measuring systems . 15 5.1 General . 15 5.2 Approach to energy measurement 16 5.3 Classification
25、of the measuring system 16 5.4 Gas measuring system modules 18 6 Energy Determination 18 6.1 General . 18 6.2 Requirements for measurements used in energy determination 19 6.3 Calculation method of energy using assigned GCV and P, T, Z values . 21 6.4 Calculation method of energy using an on-site CV
26、DD and on-site PTZ-Conversion 21 6.5 Calculation method of energy using an assigned GCV and PTZ-conversion . 21 6.6 Calculation method of energy using PT-Conversion and assigned GCV and Z value . 21 6.7 Calculation method of energy using T-Conversion and assigned GCV, and P, Z values 21 6.8 Gas temp
27、erature conversion 21 6.9 Gas pressure conversion . 22 6.10 Compressibility conversion 22 6.11 PTZ-conversion . 22 6.12 Uncertainty of energy determination . 22 7 Design of gas measuring system . 23 7.1 General . 23 7.2 Safety provision 23 7.3 Housing 24 7.4 Gas measuring station 24 7.5 External inf
28、luences 24 7.6 Gas measuring installation . 25 7.7 Calorific value determination system . 29 7.8 Gas pressure measurement 29 7.9 Gas temperature measurement 30 7.10 Conversion device 31 7.11 Compression factor . 31 7.12 Pipework requirements 32 7.13 Valves 32 7.14 Parallel meter runs 33 7.15 Pulsati
29、ons and vibrations . 33 7.16 Filter 34 DIN EN 1776:2016-05 EN 1776:2015 (E)3 7.17 Gas conditioning, hydrate protection 34 7.18 Duplication of measuring instruments . 34 7.19 Venting 35 7.20 Ventilation . 35 7.21 Odorants and/or additives 35 7.22 Electromagnetic compatibility (EMC) . 35 7.23 Document
30、ed provisions . 35 8 Construction of a gas measuring installation . 36 8.1 General . 36 8.2 Specific requirements for thermowells 37 8.3 Specific requirements for (differential) pressure transducers . 37 8.4 Specific requirements for sampling systems for CVDDs . 37 8.5 Corrosion protection . 37 8.6
31、Electrical equipment in hazardous area 38 9 Testing of the gas measuring installation/station 38 9.1 Strength and tightness test 38 9.2 Purging . 38 10 Pre-commissioning and commissioning of the gas measuring installation 38 10.1 General . 38 10.2 Pre-commissioning checks 39 10.3 Commissioning and r
32、e-commissioning 39 10.4 Acceptance, documentation and hand-over . 41 10.5 Post-commissioning checks 41 11 Operation and maintenance . 42 11.1 General . 42 11.2 Reference equipment 43 11.3 Gas meters . 43 11.4 Conversion devices 45 11.5 Calorific value determination device 45 11.6 Sensors . 46 11.7 C
33、alibration/verification and maintenance records . 46 12 Decommissioning . 46 Annex A (informative) Guideline for the selection of meters 47 Annex B (informative) Sensor test procedures . 52 B.1 Differential pressure sensors . 52 B.2 Pressure sensors . 53 B.3 Temperature sensors 53 B.4 Density sensor
34、s . 54 Annex C (informative) Set of formulae to calculate volume or mass to energy 56 C.1 General . 56 C.2 Calculation of volume 56 C.3 Calculation of mass 57 C.4 Calculation of energy . 57 Annex D (informative) Comformity assessment for the energy determination . 58 D.1 Introduction 58 DIN EN 1776:
35、2016-05EN 1776:2015 (E) 4 D.2 Measurement Systems 58 D.3 Energy Measurement Systems. 59 Annex E (informative) Specific national examples of the assessment of conformity of the metrological performance of a gas measuring system . 60 E.1 Introduction . 60 E.2 Example 1 61 E.3 Example 2 64 E.4 Example
36、3 67 E.5 Example 4 70 E.6 Example 5 72 E.7 Example 6 74 E.8 Example 7 77 Annex F (informative) Documentation and records . 81 F.1 Documentation 81 F.2 Records 81 F.3 Documentation approval . 81 Annex G (informative) Typical examples of positions of gas measuring installations 82 Annex H (informative
37、) Significant technical changes from the last edition of this standard, EN 1776:1998 83 Bibliography . 84 DIN EN 1776:2016-05 EN 1776:2015 (E) 5 European foreword This document (EN 1776:2015) has been prepared by Technical Committee CEN/TC 234 “Gas infrastructure”, the secretariat of which is held b
38、y 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 that some
39、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 supersedes EN 1776:1998. This document has been prepared under the mandate M/017 given to CEN by the European Commission
40、 and the European Free Trade Association. This version of the standard comprises a major revision of EN 1776:1998. The scope of the standard is expanded and now includes also gas measuring systems in light industry, commercial as well as residental use. For this purpose the document has been restruc
41、tured and amended. This European Standard has in part been developed in response to the work of the European Standards Organisations (CEN/CENELEC/ETSI) under the Commission Mandate M/441. The standard should be read in conjunction with CEN/CLC/ETSI TR 50572, Functional Reference Architecture for Com
42、munications in Smart Metering Systems and EN 16314, Gas meters Additional functionalities (often referred to as a smart gas meter). Directive 2009/73/EC concerning common rules for the internal market in natural gas and the related Regulation (EC) No 715/2009 on conditions for access to the natural
43、gas transmission networks also aim at technical safety (security) including technical reliability of the European gas system. These aspects are also in the scope of CEN/TC 234 standardization. In this respect CEN/TC 234 evaluated the indicated EU legislation and amended this technical standard accor
44、dingly, where required and appropriate. This European Standard covers the environmental aspects relevant to the design, construction, operation, and maintenance and commissioning/decommissioning of gas measuring systems, where appropriate, in accordance with CEN Guide 4 and CEN/TR 16388. In preparin
45、g this European Standard, a basic understanding of gas infrastructure by the user has been assumed. 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, C
46、yprus, 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 the Uni
47、ted Kingdom. DIN EN 1776:2016-05 EN 1776:2015 (E) 6 Introduction This European Standard specifies different classes of measuring systems, each having their own specific requirements. By nature, a measuring system is an aggregate of several components. In this European Standard, it is assumed that ea
48、ch component is in full compliance with applicable CEN or ISO standards, if any. This European Standard allows the user to choose between different accuracy classes of measuring systems, the choice of which can be justified on economic grounds. DIN EN 1776:2016-05 EN 1776:2015 (E) 7 1 Scope This Eur
49、opean Standard specifies functional requirements for the design, construction, testing, commissioning/decommissioning, operation, maintenance and, where appropriate, calibration, together with suitable documented provisions for all new gas measuring systems and any major changes of existing systems. This European Standard also specifies accuracy classes of measuring systems and thresholds applicable to these classes. Demonstration of compliance is achieved through the se
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