IEEE 62582-3-2012 Nuclear power plants C Instrumentation and control important to safety C Electrical equipment condition monitoring methods C Part 3 Elongation.pdf

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1、 IEC/IEEE 62582-3 Edition 1.0 2012-11 INTERNATIONAL STANDARD NORME INTERNATIONALE Nuclear power plants Instrumentation and control important to safety Electrical equipment condition monitoring methods Part 3: Elongation at break Centrales nuclaires de puissance Instrumentation et contrle-commande im

2、portants pour la sret Mthodes de surveillance de ltat des matriels lectriques Partie 3: Allongement la rupture IEC/IEEE62582-3:2012THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2012 IEC, Geneva, Switzerland Copyright 2012 IEEE All rights reserved. Unless otherwise specified, no part of this publ

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12、NORME INTERNATIONALE Nuclear power plants Instrumentation and control important to safety Electrical equipment condition monitoring methods Part 3: Elongation at break Centrales nuclaires de puissance Instrumentation et contrle-commande importants pour la sret Mthodes de surveillance de ltat des mat

13、riels lectriques Partie 3: Allongement la rupture INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE T ICS 27.120.20 PRICE CODE CODE PRIX ISBN 978-2-83220-424-5 Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez

14、 vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 62582-3 IEC/IEEE:2012 CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 Scope and object 8 2 Terms and definitions . 8 3 General description 9 4 Applicability and reproducibility 9 5 Measurement procedure . 9 5.1 Stabilisation of

15、 the polymeric materials 9 5.2 Sampling . 9 5.2.1 General . 9 5.2.2 Sample requirements . 10 5.3 Specimen preparation . 10 5.3.1 General . 10 5.3.2 Dumb-bell specimens 11 5.3.3 Tubular specimens 11 5.3.4 O-ring specimens 11 5.4 Instrumentation . 11 5.4.1 Tensile test machine 11 5.4.2 Calibration . 1

16、1 5.4.3 Use of extensometers 11 5.5 Tensile elongation measurement method. 12 5.5.1 Conditioning 12 5.5.2 Dimensions of test specimens . 12 5.5.3 Clamping . 12 5.5.4 Testing speed 12 5.5.5 Recording data 13 5.5.6 Calculation of results . 13 5.6 Measurement report 14 Annex A (informative) Shape and d

17、imensions of test specimens 15 Annex B (informative) Preparation of test specimens from cable samples 18 Annex C (informative) Typical load versus elongation curves . 20 Annex D (normative) Dies for cutting dumb-bell specimens 22 Annex E (informative) Example of a measurement report from tensile elo

18、ngation measurements 23 Bibliography 24 Figure A.1 Shape of dumb-bell specimens . 15 Figure A.2 Fitting end tabs to tubular specimens 16 Figure A.3 Fitting soft inserts to tubular specimens 17 Figure A.4 Mounting of O-ring specimens in the test machine 17 Figure C.1 Typical load-elongation curves .

19、20 Figure C.2 Typical load-time curve with a slipping specimen 21 Figure D.1 Suitable cutters for dumb-bell specimens 22 62582-3 IEC/IEEE:2012 3 Table 1 Testing speeds for elongation measurements 12 Table A.1 Recommended dimensions for dumb-bell specimens . 15 4 62582-3 IEC/IEEE:2012 INTERNATIONAL E

20、LECTROTECHNICAL COMMISSION _ NUCLEAR POWER PLANTS INSTRUMENTATION AND CONTROL IMPORTANT TO SAFETY ELECTRICAL EQUIPMENT CONDITION MONITORING METHODS Part 3: Elongation at break FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising a

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38、irely their own responsibility. 62582-3 IEC/IEEE:2012 5 International Standard IEC/IEEE 62582-3 has been prepared by subcommittee 45A: Instrumentation and control of nuclear facilities, of IEC technical committee 45: Nuclear instrumentation, in cooperation with the Nuclear Power Engineering Committe

39、e of the Power F is the measured load at break, measured in Newton; A is the initial cross-sectional area of the specimen, expressed in mm2. The cross-sectional area for tubular specimens is given by 14 62582-3 IEC/IEEE:2012 g71g71g83 g117g16g117g32 )(DA(4) where D is the mean value of the outer dia

40、meter and g303 is the mean value of the thickness (see clause 5.5.2). 5.6 Measurement report The measurement report shall include the following items. a) Identification of the equipment sampled. This shall include g120 details of the material being sampled e.g. the generic polymer type, specific for

41、mulation numbers, g120 where the sample was taken from, g120 for samples taken in plant, location within the plant. b) Pre-history of the equipment sampled. This shall include g120 time in service, or ageing time for laboratory aged samples, g120 the environmental conditions to which it has been exp

42、osed, e.g. temperature, radiation, g120 stabilisation time for unaged samples. c) Place and date of the measurements. d Number of specimens measured (5.2.2). e) Details of specimen preparation (5.3 and Annex B). f) Specimen type dumb-bell/tube/ring and type of end tab/insert used, dimensions of spec

43、imen; indicate whether specimens prepared before or after ageing (5.3 and 5.5.2). g) Instrument used and software version used for analysis (5.4.1). h) Calibration procedure (5.4.2). i) Extensometer type used, if any (5.4.3). j) Type of grips used to clamp specimens or pulley diameter for O-ring spe

44、cimens (5.5.3). k) Test speed used (5.5.4). l) Whether elongation calculated from gauge length, using an extensometer, or nominal elongation (5.5.6). m) Individual elongation values (in %), mean values, and standard deviation; indicate in a comments column any values excluded from calculation of the

45、 mean because of failure in the grips or slippage. If strength values (in MPa) have also been calculated, these should be included as subsidiary data. n) Examples of typical load versus elongation plots. Any atypical plots shall also be included. 62582-3 IEC/IEEE:2012 15 Annex A (informative) Shape

46、and dimensions of test specimens A.1 Preparation of dumb-bell specimens The recommended shape for dumb-bell test specimens is shown in Figure A.1 with dimensions as specified in Table A.1. Dumb-bell specimens may be used with dimensions different from those given in Table A.1, e.g. conforming to Nat

47、ional Standards. However, it is important for reproducibility that the same dimensions are used for both baseline measurements and samples taken from aged material. The test specimens shall be cut from the equipment sample (e.g. a section of cable) using a suitable die, such as described in Annex D.

48、 Specimens should not be prepared from slab samples, since these are not necessarily representative of the material. Slab samples are usually considerably thicker than the material used in equipment such as cables. This may raise issues of diffusion-limited oxidation and differences in orientation o

49、f the molecular structure if slab samples are used. =l IEC 1978/12 Key l is the gauge length Figure A.1 Shape of dumb-bell specimens Table A.1 Recommended dimensions for dumb-bell specimens Dimension mm Type 1 Type 1A Type 2 Type 3 Overall length minimum 115 100 75 50 Width of ends 25 g114 1 25 g114 1 12,5 g114 1 8,5 g114 0,5 Length of narrow portion 33 g114 2 22 g114 1 25 g114 1 16 g114 1 Width of narrow portion 6 g114 0,2 5 g114 0,1 4 g114 0,1 4 g114