BS-5728-2-SUPPLEMENT-NO.1-1984 ISO-4064-2-1978-ADD-1-1993.pdf
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1、BRITISH STANDARD BS 5728-2: Supplement 1:1984 ISO 4064-2: 1978 Addendum 1:1993 Incorporating Amendment No. 1 Measurement of flow of cold potable water in closed conduits Part 2: Specification for installation requirements for single meters Supplement 1: Parallel and multiple meter operation ISO titl
2、e: Measurement of water flow in closed conduits Meters for cold potable water Part 2: Installation requirements Addendum 1: Parallel and multiple meter operation UDC 532.542:628.1.033:681.121.002.72 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:19:06 GMT+00:00 2006, Uncontrolled Copy, (c
3、) BSI BS 5728-2:Supplement 1:1984 This British Standard, having been prepared under the direction of the Industrial-process Measurement and Control Standards Committee, was published under the authority of the Board of BSI and comes into effect on 31 May 1984 BSI 07-1999 The following BSI references
4、 relate to the work on this standard: Committee reference PCL/2 Draft for comment 81/32060 DC ISBN 0 580 13863 1 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Industrial-process Measurement and Control Standards Committee (PCL/-) to Te
5、chnical Committee PCL/2 upon which the following bodies were represented: British Compressed Air Society British Gas Corporation Department of Energy (Gas Standards) Department of Trade and Industry (National Engineering Laboratory) Department of Trade and Industry (National Weights and Measures Lab
6、oratory) Electricity Supply Industry in England and Wales Energy Industries Council Gambica (Beama Ltd.) Institute of Measurement and Control Institute of Petroleum Institute of Trading Standards Administration Institution of Gas Engineers Society of Chemical Industry STC Water Regulations and Fitti
7、ngs Scheme United Kingdom Atomic Energy Authority Coopted member The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Institution of Water Engineers and Scientists Water Research Centre Amendments issued since publication Amd. No.Date of issue
8、Comments 5131July 1986Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:19:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5728-2:Supplement 1:1984 BSI 07-1999i Contents Page Committees responsibleInside front cover National forewordii 1 Scope and field
9、 of application1 2 Definition1 3 Examples of use of meters operating in parallel and multiple meter operation1 4 Criteria for the selection of water meters1 5 Associated fittings1 6 Installation1 7First operation of water meters2 Publication referred toInside back cover Licensed Copy: sheffieldun sh
10、effieldun, na, Fri Dec 01 14:19:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5728-2:Supplement 1:1984 ii BSI 07-1999 National foreword This Supplement to British Standard 5728-2 has been prepared under the direction of the Industrial-process Measurement and Control Standards Committee and is ide
11、ntical with ISO 4064-2:1978:Addendum 1 “Measurement of water flow in closed conduits Meters for cold potable water Part 2: Installation requirements Addendum 1: Parallel and multiple meter operation”, published in 1983 by the International Organization for Standardization (ISO). Terminology and conv
12、entions. The text of the international standard has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention is drawn especially to the following. Where the word “adde
13、ndum” appears, referring to this standard, it should be read as “supplement”. ISO 7858-1, referred to in the text as being at the stage of draft, has been published under the title “Measurement of water flow in closed conduits Meters for cold potable water Combination meters Part 1: Specification”.
14、The term “combined meters” has not been used. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligati
15、ons. Cross-reference International standardCorresponding British Standard ISO 7858-1:1985BS 5728 Measurement of flow of cold potable water in closed conduits Part 4:1986 Specification for combination meters (Identical) Summary of pages This document comprises a front cover, an inside front cover, pa
16、ges i and ii, pages 1 and 2, an inside 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. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:19:06 G
17、MT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5728-2:Supplement 1:1984 BSI 07-19991 1 Scope and field of application This addendum to ISO 4064-2 specifies criteria additional to those given for single meter installations in ISO 4064-2 and applicable to single water meters operating either in parallel
18、 or grouped together in one location. It is not applicable to “combined” meters for which specifications are given in ISO 7858-1.1) 2 Definitions For the purpose of this addendum, the following definitions apply. 2.1 parallel operation operation of two or more meters grouped together and connected t
19、o a common source and a common delivery 2.2 multiple meter operation operation of several meters grouped together where their inlets are connected to a common source, or their outlets to a common delivery, but not both 3 Examples of use of meters operating in parallel and multiple meter operation 3.
20、1 Water meters may be operated in parallel where the installation of one large meter to meet the maximum water demand or to cover the required flowrate range is impractical. 3.2 Water meters may be installed in parallel where “stand by” meters are necessary to ensure continuity of delivery and flow
21、measurement in the case of filter blockage or water meter breakdown. 3.3 Meters are grouped together for ease of access, service and reading, where it is necessary to split a water supply into a number of branches, as for instance in a block of flats, or where it is necessary to unite a number of me
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