1、April 2012 Translation by DIN-Sprachendienst.English price group 7No 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).ICS 0
2、1.060; 23.020.30!$:“1882304www.din.deDDIN EN 764-2Pressure equipment Part 2: Quantities, symbols and unitsEnglish translation of DIN EN 764-2:2012-04Druckgerte Teil 2: Gren, Symbole und EinheitenEnglische bersetzung von DIN EN 764-2:2012-04Equipements sous pression Partie 2: Grandeurs, symboles et u
3、nitsTraduction anglaise de DIN EN 764-2:2012-04SupersedesDIN EN 764-2:2002-09www.beuth.deDocument comprises 9 pagesIn case of doubt, the German-language original shall be considered authoritative.03.12 DIN EN 764-2:2012-04 2 A comma is used as the decimal marker. National foreword This standard has
4、been prepared by Technical Committee CEN/TC 54 “Unfired pressure vessels” (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was the Normenausschuss Chemischer Apparatebau (Process Engineering Standards Committee), Working Committee NA 012-00-05 AA Druckbehlt
5、er. Amendments This standard differs from DIN EN 764-2:2002-09 as follows: a) normative references have been updated; b) Tables have been revised. Previous editions DIN EN 764-2: 2002-09 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 764-2 January 2012 ICS 01.060; 23.020.30 Supersedes EN 764-2
6、:2002English Version Pressure equipment - Part 2: Quantities, symbols and units Equipements sous pression - Partie 2: Grandeurs, symboles et units Druckgerte - Teil 2: Gren, Symbole und Einheiten This European Standard was approved by CEN on 9 December 2011. CEN members are bound to comply with the
7、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 standards may be obtained on application to the CEN-CENELEC Management
8、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 and notified to the CEN-CENELEC Management Centre has the same status as
9、 the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Rom
10、ania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means
11、reserved worldwide for CEN national Members. Ref. No. EN 764-2:2012: EEN 764-2:2012 (E) 2 Contents page Foreword 31 Scope 42 Normative references 43 General 44 Quantities, symbols and units 4DIN EN 764-2:2012-04EN 764-2:2012 (E) 3 Foreword This document (EN 764-2:2012) has been prepared by Technical
12、 Committee CEN/TC 54 “Unfired pressure vessels”, the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July 2012, and conflicting national standards shall be wit
13、hdrawn at the latest by July 2012. 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 identifying any or all such patent rights. This document supersedes EN 764-2:2002. This Europe
14、an Standard consists of seven parts which are: Part 1 Terminology Pressure, temperature, volume and nominal size; Part 2 Quantities, symbols and units; Part 3 Definition of parties involved; Part 4 Establishment of technical delivery conditions for metallic materials; Part 5 Compliance and Inspectio
15、n Documentation of Materials; Part 6 Structure and content of operating instructions; Part 7 Safety systems for unfired pressure equipment. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard
16、: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the Un
17、ited Kingdom. DIN EN 764-2:2012-04EN 764-2:2012 (E) 4 1 Scope This European Standard specifies the basic quantities, symbols and units to be used for pressure equipment and assemblies addressed by the European Directive 97/23/EC. 2 Normative references The following referenced documents are indispen
18、sable for the application of this document. For dated references, only the edition cited applies. For undated references the latest edition of the referenced document (including any amendments) applies. ISO 80000-1, Quantities and units Part 1: General ISO 80000-2, Quantities and units Part 2: Mathe
19、matical signs and symbols to be used in the natural sciences and technology ISO 80000-3, Quantities and units Part 3: Space and time ISO 80000-4, Quantities and units Part 4: Mechanics ISO 80000-5, Quantities and units Part 5: Thermodynamics ISO 80000-11, Quantities and units Part 11: Characteristic
20、 numbers 3 General 3.1 All units used for pressure equipment shall be derived from the base units of the international system of Units (SI) in accordance with ISO 80000-1, ISO 80000-2, ISO 80000-3, ISO 80000-4, ISO 80000-5, and ISO 80000-11 unless otherwise prescribed in the European Directive 97/23
21、/EC. 3.2 The choice of the appropriate multiple (decimal multiple or sub-multiple) of unit is governed by convenience, the multiple chosen for a particular application being one which would lead to numerical values within a practical range. Therefore when indicating quantities it is recommended to c
22、hoose decimal multiple or sub multiple quantities such that the resulting values are easy to handle, e.g. between 0,1 and 1 000. 4 Quantities, symbols and units Symbols and units for the quantities used in pressure equipment shall be in accordance with Tables 1 and 2, otherwise according to ISO 8000
23、0 series for other quantities and in particular ISO 80000-5 for thermodynamic quantities. DIN EN 764-2:2012-04EN 764-2:2012 (E) 5 Table 1 General quantities Quantity Symbol Unit Time t s, min, h Frequency f Hz Dimension any Latin letter bmm Length l mm Thickness e a mm Corrosion allowance c mm Diame
24、ter d, D mm Radius r, R mm Area A, S mm2Volume, capacity V m3 c, dWeight W aN, kN Density kg/m3ePower kW, MW Second moment of area mm4Section modulus Z mm3Acceleration am/s2Plane angle any Greek letter brad, a Symbol differs from the one recommended in ISO 80000.b Symbols may use any lower-case lett
25、er, except for those defined elsewhere in this table. cVolume may also be given in L, when required by Pressure Equipment Directive, or in mm3. dLitre “L“ is a non-SI unit which may be used with SI units and their multiples. eDensity may also be given in kg/dm3and kg/mm3.DIN EN 764-2:2012-04EN 764-2
26、:2012 (E) 6 Table 2 Mechanical quantities Quantity bSymbol cUnit Force F N Moment M N.mm Pressure p, P abar d, MPa Temperature T aC Thermodynamic temperature T K Linear expansion coefficient 10-6m/(m*C) Normal stress MPa, N/mm2Shear stress MPa, N/mm2Nominal design stress f MPa, N/mm2Tensile strength
27、 RmMPa, N/mm2Tensile strength at 20 C Rm/20MPa, N/mm2Yield strength ReMPa, N/mm2Yield strength at 20 C Re/20MPa, N/mm21,0 % proof strength Rp1,0MPa, N/mm2Proof strength at temperature T Rp/TMPa, N/mm2Upper yield strength ReHMPa, N/mm20,2 % proof strength Rp0,2MPa, N/mm20,2 % proof strength at temper
28、ature T Rp0,2/TMPa, N/mm2Ultimate tensile strength at temperature T Rm/TMPa, N/mm21 % plastic creep strain strength limit at temperature T and time t e, gRcp1/T/t gMPa, N/mm2Creep rupture strength at temperature T and time t eRcm/T/t gMPa, N/mm2Modulus of elasticity E MPa, N/mm2Shear modulus G MPa,
29、N/mm2Poissons ratio - Strain % Elongation after rupture/fracture A % Impact energy KV J Hardness HB h, HV f- Joint coefficient z - Safety factor S - DIN EN 764-2:2012-04EN 764-2:2012 (E) 7 Table 2 (continued) a Symbol differs from the one recommended in ISO 80000.b Quantities without a temperature i
30、ndex normally refer to room temperature. cSome of these symbols, such as R, f, are not part of ISO 80000.d“bar“ is a non-SI unit which may be used with SI units and their multiples. The unit bar shall be used on nameplates, certificates, drawings, pressure gauges and instrumentation and is always us
31、ed as a gauge pressure. This is in line with the requirements of the Pressure Equipment Directive 97/23/EC. 1 bar = 0,1 MPa. eMean value. fThe hardness symbol HV is to be followed by a number (e.g., HV10) indicating the force (in) kg used for testing. gDiffers from present usage in EN 13445:2010, bu
32、t the intention is to revise EN 13445:2010 accordingly. hThe hardness symbol HB is often followed by a letter (e.g., HBW) indicating the material in the indenter (W would stand for tungsten). NOTE The use of symbols for temperature may be different from the Pressure Equipment Directive 97/23/EC. DIN EN 764-2:2012-04
