1、September 2014 Translation by DIN-Sprachendienst.English price group 25No 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).
2、ICS 75.060!%:T“2235849www.din.deDDIN EN ISO 15112Natural gas Energy determination (ISO 15112: 2011);English version EN ISO 15112:2014,English translation of DIN EN ISO 15112:2014-09Erdgas Bestimmung von Energiemengen (ISO 15112:2011);Englische Fassung EN ISO 15112:2014,Englische bersetzung von DIN E
3、N ISO 15112:2014-09Gaz naturel Dtermination de lnergie (ISO 15112:2011);Version anglaise EN ISO 15112:2014,Traduction anglaise de DIN EN ISO 15112:2014-09www.beuth.deDocument comprises 70 pagesIn case of doubt, the German-language original shall be considered authoritative.08.14 DIN EN ISO 15112:201
4、4-09 2 A comma is used as the decimal marker. National foreword The text of ISO 15112:2011 has been prepared by Technical Committee ISO/TC 193 “Natural gas” (Secretariat: NEN, Netherlands) and has been taken over by CCMC as EN ISO 15112:2014. The responsible German body involved in its preparation w
5、as the Normenausschuss Gastechnik (DIN Standards Committee Gas Technology), Working Committee NA 032-02-05 AA Gasmessung. This International Standard provides the means for energy determination of natural gas by measurement or by calculation, and describes the related techniques and measures that ar
6、e necessary to take. The calculation of thermal energy is based on the separate measurement of the quantity, either by mass or by volume, of gas transferred and its measured or calculated calorific value. The general means of calculating uncertainties are also given. This International Standard appl
7、ies to any gas-measuring station from domestic to very large high-pressure transmission. This standard has been included in the body of technical rules and standards for gas issued by the DVGW Deutscher Verein des Gas- und Wasserfaches e.V. (German Technical and Scientific Association for Gas and Wa
8、ter). EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 15112 March 2014 ICS 75.060 English Version Natural gas - Energy determination (ISO 15112:2011) Gaz naturel - Dtermination de lnergie(ISO 15112:2011)Erdgas - Bestimmung von Energiemengen(ISO 15112:2011) This European Standard was approve
9、d by CEN on 16 February 2014. 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
10、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 a
11、nd 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, Hung
12、ary, 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 CEN-CENE
13、LEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 15112:2014 EContents Page Foreword . 4 Introduction . 5 1 Scope 6 2 Normative references 6 3 Terms and definitions .
14、6 4 Symbols and units . 11 5 General principles . 11 6 Gas measurement . 13 6.1 General . 13 6.2 Volume measurement . 14 6.3 Calorific value measurement . 14 6.4 Volume conversion . 15 6.5 Calibration 16 6.6 Data storage and transmission 16 7 Energy determination 17 7.1 Interfaces 17 7.2 Methods of
15、energy determination 19 8 Strategy and procedures 21 8.1 General . 21 8.2 Strategies for energy determination 23 8.3 Plausibility checks 27 9 Assignment methods 28 9.1 Fixed assignment 28 9.2 Variable assignment 30 9.3 Determination of the representative calorific value . 32 10 Calculation of energy
16、 quantities 33 10.1 General equations for energy 33 10.2 Calculation of averaged values Calculation from average calorific values and cumulative volumes 35 10.3 Volume and volume-to-mass conversions . 35 10.4 Energy determination on the basis of declared calorific values 35 11 Accuracy on calculated
17、 energy . 36 11.1 Accuracy 36 11.2 Calculation of uncertainty 36 11.3 Bias . 37 12 Quality control and quality assurance 38 12.1 General . 38 12.2 Check of the course of the measuring data 39 12.3 Traceability . 39 12.4 Substitute values . 39 Annex A (informative) Main instruments and energy-determi
18、nation techniques 41 Annex B (informative) Different possible patterns in the change of the calorific value 46 Annex C (informative) Volume conversion and volume-to-mass conversion 49 Annex D (informative) Incremental energy determination 50 DIN EN ISO 15112:2014-09 EN ISO 15112:2014 (E) 2 Annex E (
19、informative) Practical examples for volume conversion and energy quantity calculation .52 Annex F (informative) Practical examples for averaging the calorific value due to different delivery situations .56 Annex G (informative) Ways of determining substitute values 61 Annex H (informative) Plausibil
20、ity check graphical example .63 Annex I (informative) Uncorrected data, bias correction and final result graphical example .64 Annex J (informative) Single-reservoir calorific value determination .66 Bibliography 67 DIN EN ISO 15112:2014-09 EN ISO 15112:2014 (E) 3 Foreword The text of ISO 15112:2011
21、 has been prepared by Technical Committee ISO/TC 193 “Natural gas” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 15112:2014. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endor
22、sement, at the latest by September 2014, and conflicting national standards shall be withdrawn at the latest by September 2014. 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 i
23、dentifying any or all such patent rights. 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, Czech Republic, Denmark, Estonia, Finland, Former Y
24、ugoslav 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 Kingdom. Endorsement notice The text of ISO 15112:2011
25、 has been approved by CEN as EN ISO 15112:2014 without any modification. DIN EN ISO 15112:2014-09 EN ISO 15112:2014 (E) 4 Introduction Since the early 1800s, it has been general practice for manufactured gas and, subsequently, natural gas to be bought and sold on a volumetric basis. Much time and ef
26、fort has therefore been devoted to developing the means of flow measurement. Because of the increasing value of energy and variations in gas quality, billing on the basis of thermal energy has now become essential between contracting partners and the need to determine calorific value by measurement
27、or calculation has led to a number of techniques. However, the manner in which calorific value data are applied to flow volume data to produce the energy content of a given volume of natural gas has been far from a standardized procedure. Energy determination is frequently a necessary factor whereve
28、r and whenever natural gas is metered, from production and processing operations through to end-user consumption. This International Standard has been developed to cover aspects related to production/transmission and distribution/end user. It provides guidance to users of how energy units for billin
29、g purposes are derived, based on either measurement or calculation or both, to increase confidence in results for contracting partners. Other standards relating to natural gas, flow measurement, calorific value measurement, calculation procedures and data handling with regard to gas production, tran
30、smission and distribution involving purchase, sales or commodity transfer of natural gas can be relevant to this International Standard. This International Standard contains ten informative annexes. DIN EN ISO 15112:2014-09 EN ISO 15112:2014 (E) 5 1 Scope This International Standard provides the mea
31、ns for energy determination of natural gas by measurement or by calculation, and describes the related techniques and measures that are necessary to take. The calculation of thermal energy is based on the separate measurement of the quantity, either by mass or by volume, of gas transferred and its m
32、easured or calculated calorific value. The general means of calculating uncertainties are also given. Only systems currently in use are described. NOTE Use of such systems in commercial or official trade can require the approval of national authorization agencies, and compliance with legal regulatio
33、ns is required. This International Standard applies to any gas-measuring station from domestic to very large high-pressure transmission. New techniques are not excluded, provided their proven performance is equivalent to, or better than, that of those techniques referred to in this International Sta
34、ndard. Gas-measuring systems are not the subject of this International Standard. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the r
35、eferenced document (including any amendments) applies. ISO 6976, Natural gas Calculation of calorific values, density, relative density and Wobbe index from composition 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 accuracy of measurement c
36、loseness of the agreement between a measurement result and a true value of the measurand ISO 14532:2001 3.2 adjustment of a measuring instrument operation of bringing a measuring instrument into a state of performance suitable for its use NOTE Adjustment may be automatic, semi-automatic or manual. D
37、IN EN ISO 15112:2014-09 EN ISO 15112:2014 (E) 6 3.3 assignment method energy determination method to derive a calorific value to be applied to the gas passing specified interfaces having only volume measurements 3.4 availability probability, at any time, that the measuring system, or a measuring ins
38、trument forming part of the measuring system, is functioning according to specifications EN 1776:1998 3.5 bias systematic difference between the true energy and the actual energy determined of the gas passing a gas-measuring station 3.6 calibration set of operations that establish, under specified c
39、onditions, the relationship between values of quantities indicated by a measuring instrument or measuring system, or values represented by a material measure or a reference material, and the corresponding values obtained using working standards ISO 14532:2001, 2.5.2.2 3.7 superior calorific value en
40、ergy released as heat by the complete combustion in air of a specified quantity of gas, in such a way that the pressure, p1, at which the reaction takes place remains constant, and all the products of combustion are returned to the same specified temperature, T1, as that of the reactants, all of the
41、se products being in the gaseous state except for water formed by combustion, which is condensed to the liquid state at T1ISO 14532:2001, 2.6.4.1 3.8 inferior calorific value energy released as heat by the complete combustion in air of a specified quantity of gas, in such a way that the pressure, p1
42、, at which the reaction takes place remains constant, and all the products of combustion are returned to the same specified temperature, T1, as that of the reactants, all of these products being in the gaseous state ISO 14532:2001, 2.6.4.2 3.9 calorific value station installation comprising the equi
43、pment necessary for the determination of the calorific value of the natural gas in the pipeline 3.10 adjusted calorific value calorific value measured at a measuring station compensated for the time taken for the gas to travel to the respective volume-measuring station 3.11 corrected calorific value
44、 result of correcting a measurement to compensate for systematic error DIN EN ISO 15112:2014-09 EN ISO 15112:2014 (E) 7 3.12 declared calorific value calorific value that is notified in advance of its application to interfaces for the purpose of energy determination 3.13 representative calorific val
45、ue calorific value which is accepted to sufficiently approximate the actual calorific value at an interface 3.14 charging area set of interfaces where the same method of energy determination is used 3.15 conversion determination of the volume under reference conditions from the volume under operatin
46、g conditions 3.16 correction value added algebraically to the uncorrected result of a measurement to compensate for systematic error NOTE 1 The correction is equal to the negative of the estimated systematic error. NOTE 2 Since the systematic error cannot be known perfectly, the correction cannot be
47、 complete (see Annex I). 3.17 correction factor numerical factor by which the uncorrected result of a measurement is multiplied to compensate for a systematic-error object NOTE Since the systematic error cannot be known perfectly, the correction cannot be complete (see Annex I). 3.18 determination set of operations that are carried out on an object in order to pr
