BS EN ISO 7278-1-1990 Liquid hydrocarbons - Dynamic measurement - Proving systems for volumetric meters - General principles《液态烃 动态测量 容积计量计正系统 第1部分 一般原理》.pdf
《BS EN ISO 7278-1-1990 Liquid hydrocarbons - Dynamic measurement - Proving systems for volumetric meters - General principles《液态烃 动态测量 容积计量计正系统 第1部分 一般原理》.pdf》由会员分享,可在线阅读,更多相关《BS EN ISO 7278-1-1990 Liquid hydrocarbons - Dynamic measurement - Proving systems for volumetric meters - General principles《液态烃 动态测量 容积计量计正系统 第1部分 一般原理》.pdf(12页珍藏版)》请在麦多课文档分享上搜索。
1、BRITISH STANDARD BS 6866-1: 1990 ISO 7278-1: 1987 Proving systems for meters used in dynamic measurement of liquid hydrocarbons Part 1: IntroductionBS6866-1:1990 This British Standard, having been prepared under the directionof the Petroleum Standards Policy Committee, waspublished under the authori
2、tyof the Board ofBSIandcomes into effect on 31 July 1990 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference PTC/12 Draft for comment 84/51853 DC ISBN 0 580 18712 8 Committees responsible for this British Standard The preparation of this British Standard
3、 was entrusted by the Petroleum Standards Policy Committee (PTC/-) to Technical Committee PTC/12, upon which the following bodies were represented: Department of Energy (Gas and Oil Measurement Branch) Department of Trade and Industry (National Engineering Laboratory) Department of Transport (Marine
4、 Directorate) General Council of British Shipping Institute of Petroleum Royal Institution of Naval Architects Salvage Association The following bodies were also represented in the drafting of the standard, through subcommittees and panels: GAMBICA (BEAMA Ltd.) Institute of Measurement and Control U
5、nited Kingdom Offshore Operators Association Amendments issued since publication Amd. No. Date CommentsBS6866-1:1990 BSI 11-1999 i Contents Page Committees responsible Inside front cover National foreword ii 0 Introduction 1 1 Scope and field of application 1 2 Reference 1 3 Types of prover 1 4 Gene
6、ral considerations 1 5 Tank prover systems 3 6 On-line pipe prover systems 4 7 Centralized prover systems 4 8 Master meter systems 5 9 Bibliography 6 Publications referred to Inside back coverBS6866-1:1990 ii BSI 11-1999 National foreword This Part of BS 6866 has been prepared under the direction of
7、 the Petroleum Standards Policy Committee and is identical with ISO 7278-1:1987 “Liquid hydrocarbons Dynamic measurement Proving systems for volumetric meters Part 1: General principles”. ISO 7278-1 was prepared by Technical Committee 28, Petroleum products and lubricants, of the International Organ
8、ization for Standardization (ISO) as the result of discussions in which the United Kingdom participated. BS 6866-1 forms part of a series, each of which is identical with the corresponding Part of ISO 7278. The other Parts of BS 6866 are as follows: Part 2: Methods for design, installation and calib
9、ration of pipe provers (Identical with ISO 7278-2:1988); Part 3: Methods for pulse interpolation (Identical with ISO 7278-3:1986). ISO 4124 to which reference is made in clause 2 and elsewhere in this standard has not yet been published but it is likely to be approved by the responsible BSI Committe
10、e for implementation as a British Standard. With reference to the footnote to clause 9 both standards referred to have now been published. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct applicati
11、on. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International Standard Corresponding British Standard BS 6169 Methods for volumetric measurement of liquid hydrocarbons ISO 2714:1980 Part 1:1981 Displacement meter systems (other than
12、dispensing pumps) (Identical) ISO 2715:1981 Part 2:1984 Turbine meter systems (Identical) ISO 4267-2:1988 BS 7286 Method for calculation of petroleum and liquid petroleum products Part 2:1990 Dynamic measurement (Identical) BS 6866 Proving systems for meters used in dynamic measurement of liquid hyd
13、rocarbons ISO 7278-2:1988 Part 2:1990 Methods for design, installation and calibration of pipe provers (Identical) ISO 7278-3:1986 Part 3:1987 Methods for pulse interpolation (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 to 6, an in
14、side back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS6866-1:1990 BSI 11-1999 1 0 Introduction This document is the first part of an International Stand
15、ard on proving systems for meters used in dynamic measurement of liquid hydrocarbons. Future parts of ISO 7278 will provide more detailed descriptions of pipe provers, tank provers and pulse interpolation techniques; these parts are in preparation. Parts covering other aspects or types of proving sy
16、stems may be added as the need arises. The purpose of proving a meter is to determine its relative error or its meter factor as a function of flow rate and other parameters such as temperature, pressure and viscosity. The purpose of determining the relative error is to find out whether the meter is
17、working within prescribed or specially accepted limits of error, whereas the meter factor is used to correct any error in the indication of a meter by calculation. 1 Scope and field of application This part of ISO 7278 provides general principles for proving systems for meters used in dynamic measur
18、ement of liquid hydrocarbons. 2 Reference ISO 4124, Liquid hydrocarbons Dynamic measurement Statistical control of volumetric metering systems 1) . 3 Types of prover 3.1 The following types of proving systems are in use: a) tank prover systems; b) pipe provers, bidirectional and unidirectional. Pipe
19、 provers with precision tubes as described in6.7 are available for special applications; c) master meters. Indirect procedure of volume comparison which causes additional uncertainties can be used for all liquids and flow rates, provided that the master meter is proved against acceptable proving sys
20、tems under conditions which simulate those under which it will operate. Sometimes, a meter is used as a means of standardization of transfer; this equipment is generally known as a “master meter”. 3.2 Provers can be used either connected (fixed or mobile) to the metering station or in a central prov
21、ing station to which the meters or the measures can be taken to be proved. 3.3 In order to limit the maximum uncertainty to 0,01 % when using a pulse generator for proving, at least10000 pulses shall be obtained from the meter per proving run. This number of pulses can be reduced by pulse-interpolat
22、ion techniques which allow either the use of meters with fewer pulses per unit volume or reduction of the prover volume. 4 General considerations 4.1 A meter should be proved at the expected operating or prescribed or agreed rates of flow, under the pressure and temperature at which it will operate
23、and on the liquid which it will measure. In situations where it is not feasible to prove the meter on the liquid to be metered, the meter should be proved on a liquid having a density, viscosity and, if possible, temperature as close as possible to those of the liquid to be measured. A meter that is
24、 used to measure several different liquids shall be proved on each such liquid. Similar liquids may be used if a simple, known relationship exists between the relative error, flow rate and viscosity, provided that the uncertainty of measurement remains within acceptable limits. In any event, calibra
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