BS-2782-11-METHOD-1121H-1996 ISO-TR-10501-1993.pdf
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1、BRITISH STANDARD BS 2782-11: Method 1121H:1996 ISO/TR 10501:1993 Methods of testing Plastics Part 11: Thermoplastics pipes, fittings and valves Method 1121H: Thermoplastics pipes for the transport of liquids under pressure Calculation of head losses ICS 23.040.20 Licensed Copy: London South Bank Uni
2、versity, London South Bank University, Tue Dec 12 08:26:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2782-11: Method 1121H:1996 This British Standard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Boar
3、d and comes into effect on 15 August 1996 BSI 11-1998 The following BSI references relate to the work on this standard: Committee reference PRI/61 Draft for comment 90/39660 DC ISBN 0 580 26033 X Committees responsible for this British Standard The preparation of this British Standard was entrusted
4、to Technical Committee PRI/61, Plastics piping systems and components, upon which the following bodies were represented: British Gas plc British Plastics Federation British Plumbing Fittings Manufacturers Association British Valve and Actuator Manufacturers Association Chartered Institution of Water
5、 and Environmental Management Department of the Environment (British Board of Agrment) Department of the Environment (Building Research Establishment) Department of the Environment (Property and Buildings Directorate) Department of Transport Electricity Association Federation of Civil Engineering Co
6、ntractors Health and Safety Executive Institute of Building Control Institute of Materials Institution of Civil Engineers Institution of Gas Engineers National Association of Plumbing, Heating and Mechanical Services Contractors Pipeline Industries Guild Plastics Land Drainage Manufacturers Associat
7、ion Society of British Gas Industries Society of British Water Industries Water Companies Association Water Services Association of England and Wales Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 08:26:3
8、6 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2782-11: Method 1121H:1996 BSI 11-1998i Contents Page Committees responsibleInside front cover National forewordii Forewordii 1Scope1 2Definitions1 3Symbols and units1 4Method of calculation1 Annex A Formulae used in calculations3 Table 11 Table 22 Tab
9、le 32 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 08:26:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2782-11: Method 1121H:1996 ii BSI 11-1998 National foreword This British Standard has been prepared by Technical Committee PRI/61 and is identical with I
10、SO/TR 10501:1993 Thermoplastics pipes for the transport of liquids under pressure Calculation of head losses, published by the International Organization for Standardization (ISO). It is incorporated into BS 2782 Methods of testing plastics Part 11: Thermoplastics pipes, fittings and valves, as Meth
11、od 1121H:1996, for association with related test methods for plastics materials and plastics piping components. No existing British Standard is superseded by this standard. NOTEThroughout the text the words “formula” and “formulae” are used where for correct English “equation(s)” would be more appro
12、priate. 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 obligations. Summary of pages This document co
13、mprises a front cover, an inside front cover, pages i and ii, the ISO title page, page ii, pages 1 to 4 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 Co
14、py: London South Bank University, London South Bank University, Tue Dec 12 08:26:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 08:26:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2782-11: Method 1121H:1996 ii BS
15、I 11-1998 Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for
16、 which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on a
17、ll matters of electrotechnical standardization. The main task of technical committees is to prepare International Standards, but in exceptional circumstances a technical committee may propose the publication of a Technical Report of one of the following types: type 1, when the required support canno
18、t be obtained for the publication of an International Standard, despite repeated efforts; type 2, when the subject is still under technical development or where for any other reason there is the future but not immediate possibility of an agreement on an International Standard; type 3, when a technic
19、al committee has collected data of a different kind from that which is normally published as an International Standard (“state of the art”, for example). Technical Reports of types 1 and 2 are subject to review within three years of publication, to decide whether they can be transformed into Interna
20、tional Standards. Technical Reports of type 3 do not necessarily have to be reviewed until the data they provide are considered to be no longer valid or useful. ISO/TR 10501, which is a Technical Report of type 3, was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves fo
21、r the transport of fluids, Sub-Committee SC 2, Plastics pipes and fittings for water supplies. Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 08:26:36 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2782-11: Method 1121H:1996 BSI 11-19981 1 Scope This Technical R
22、eport gives a method of calculating head loss in the transport of liquids under pressure in hydraulically smooth thermoplastics pipes. The formulae given in the Technical Report apply to the transport of water under pressure, or to all other liquids of the same dynamic viscosity, at temperatures of
23、up to 45 C. 2 Definitions For the purposes of this Technical Report, the following definitions apply. 2.1 flowrate, qv volume of water flowing through the pipe per unit time 2.2 steady flow flow in which the flowrate through a measuring section does not vary with time 2.3 average velocity, v flowrat
24、e through the pipe divided by the reference cross-section of the pipe. It is calculated by dividing the actual flowrate through the pipe by the cross-section of the pipe 2.4 reference cross-section of the pipe, A area of the circle with a diameter equal to the average internal diameter of the pipe.
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