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BS EN 1776 - 2015

estaciones de medicion
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  BSI Standards Publication BS EN 1776:2015 Gas infrastructure — Gasmeasuring systems —Functional requirements  BS EN 1776:2015BRITISH STANDARD National foreword This British Standard is the UK implementation of EN 1776:2015. Itsupersedes BS EN 1776:1999 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee GSE/33/-/5, Gas Measurement (Revision of EN 1776).A list of organizations 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 2015. Published by BSI StandardsLimited 2015ISBN 978 0 580 81787 8ICS 75.180.30 Compliance 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 December 2015. Amendments issued since publication DateText affected  BS EN 1776:2015   EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM   EN 1776  December 2015  ICS 75.180.30 Supersedes EN 1776:1998 English Version Gas infrastructure - Gas measuring systems - Functional requirements Infrastructures gazières - Systèmes de mesure de gaz - Prescriptions fonctionnelles Gasinfrastruktur - Gasmesssysteme - Funktionale Anforderungen This 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 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 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, 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 United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR 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 E  BS EN 1776:2015 EN 1776:2015 (E) 2 Contents Page  European foreword ....................................................................................................................................................... 5   Introduction .................................................................................................................................................................... 6   1   Scope .................................................................................................................................................................... 7   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 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 CVDD 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 temperature 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 influences ...................................................................................................................................... 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   Pulsations and vibrations ......................................................................................................................... 33   7.16   Filter .................................................................................................................................................................. 34  
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