BS-ISO-2944-2000.pdf
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS ISO 2944:2000 ICS 23.100.01 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Fluid power systems and components Ð Nominal pressures Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:53:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 May 2000 BSI 05-2000 ISBN 0 580 34773 7 BS ISO 2944:2000 Amendments issued since publication Amd. No.DateComments National foreword This British Standard reproduces verbatim ISO 2944:2000 and implements it as the UK national standard. The UK participation in its preparation was entrusted by Technical Committee MCE/18, Fluid power systems and components, to Subcommittee MCE/18/-/9, Systems, which has the responsibility to: Ð aid enquirers to understand the text; Ð present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; Ð monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled ªInternational Standards Correspondence Indexº, or by using the ªFindº facility of the BSI Standards Electronic Catalogue. 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 comprises a front cover, an inside front cover, the ISO title page, pages ii to iv, pages 1 to 4, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:53:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 2944:2000(E) INTERNATIONAL STANDARD ISO 2944 Second edition 2000-03-15 Fluid power systems and components Nominal pressures Transmissions hydrauliques et pneumatiques Pressions nominales Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:53:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 2944:2000(E) ii? Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:53:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 2944:2000(E) ?iii 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 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 all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 2944 was prepared by Technical Committee ISO/TC 131,Fluid power systems, Subcommittee SC 1,Terminology, classification and symbols. This second edition cancels and replaces the first edition (ISO 2944:1974), which has been technically revised. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:53:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 2944:2000(E) iv? Introduction In fluid power systems, power is transmitted and controlled by a fluid (liquid or gas) under pressure within a circuit. Systems and components are generally designed and marketed for a specific fluid pressure range. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:53:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTERNATIONAL STANDARD?ISO 2944:2000(E) ?1 Fluid power systems and components Nominal pressures 1?Scope This International Standard specifies a series of nominal pressures from which to choose values used in other International Standards related to fluid power. It provides a standardized series from which to choose values applied to individual fluid power systems and/or components. The nominal pressures in this International Standard are for positive gauge pressures used with fluid power systems and/or components. NOTE?See 3.1 and 4.3 for explanations of nominal pressure. 2?Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 1000,SI units and recommendations for the use of their multiples and of certain other units. ISO 5598,Fluid power systems and components Vocabulary. 3?Terms and definitions For the purposes of this International Standard, the terms and definitions given in ISO 5598 and the following apply: 3.1 nominal pressure pressure value assigned to a component, piping or a system for the purpose of convenient designation and indicating its belonging to a series 4Units 4.1?The pressure units used shall be kilopascal or megapascal in accordance with ISO 1000, depending on the magnitude of the nominal pressure, followed by the equivalent value in bar1?in parentheses. 1)1 bar = 105Pa = 100 kPa = 0,1 MPa; 1 Pa = 1 N/m2 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:53:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 2944:2000(E) 2? 4.2?Nominal pressure shall be expressed as “nominal pressure of kPa ( bar)” or “nominal pressure of MPa ( bar).” 4.3?It shall be assumed that the nominal pressure is gauge pressure, i.e. the pressure above atmospheric pressure, when no modifier is given. 5?Nominal pressures Values should be selected from the values given in Table 1. 6?Identification statement (Reference to this International Standard) Use the following statement in test reports, catalogues, and sales literature when electing to comply with this International Standard: “Nominal pressures selected in accordance with ISO 2944:2000,Fluid power systems and components Nominal pressures.” Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:53:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 2944:2000(E) ?3 Table 1 Nominal pressures kPa?MPa?(Equivalent value in bar) 1?(0,01) 1,6?(0,016) 2,5?(0,025) 4?(0,04) 6,3?(0,063) 10?(0,1) 16?(0,16) 25?(0,25) 40?(0,4) 63?(0,63) 100?(1) 125?(1,25) 160?(1,6) 200?(2) 250?(2,5) 315?(3,15) 400?(4) 500?(5) 630?(6,3) 800?(8) 1 000?1?(10) ?1,25?(12,5) ?1,6?(16) ?2?(20) ?2,5?(25) ?3,15?(31,5) ?4?(40) ?5?(50) ?6,3?(63) ?8?(80) ?10?(100) ?12,5?(125) ?16?(160) ?20?(200) ?25?(250) ?31,5?(315) ?35?(350) ?40?(400) ?45?(450) ?50?(500) ?63?(630) ?80?(800) ?100?(1 000) ?125?(1 250) ?160?(1 600) ?200?(2 000) ?250?(2 500) NOTE?Values in brackets are non-preferred. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:53:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 2944:2000(E) 4? Bibliography 1?ISO 3322,Fluid power systems and components Cylinders Nominal pressures. 2?ISO 4399,Fluid power systems and components Connectors and associated components Nominal pressures. 3?ISO 5941,Compressors, pneumatic tools and machines Preferred pressures. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:53:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:53:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 2944:2000 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI Ð British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. 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