1、July 2017 English price group 10No 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 01.040.19; 19.100!%h8X“2692153www.d
2、in.deDIN EN ISO 20484Nondestructive testing Leak testing Vocabulary (ISO 20484:2017);English version EN ISO 20484:2017,English translation of DIN EN ISO 20484:2017-07Zerstrungsfreie Prfung Dichtheitsprfung Begriffe (ISO 20484:2017);Englische Fassung EN ISO 20484:2017,Englische bersetzung von DIN EN
3、ISO 20484:2017-07Essais nondestructifs Contrle dtanchit Vocabulaire (ISO 20484:2017);Version anglaise EN ISO 20484:2017,Traduction anglaise de DIN EN ISO 20484:2017-07SupersedesDIN EN 13308:199807www.beuth.deDocument comprises 16 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-l
4、anguage original shall be considered authoritative.07.17 DIN EN ISO 20484:2017-07 2 A comma is used as the decimal marker. National foreword This document (EN ISO 20484:2017) has been prepared by Technical Committee CEN/TC 138 “Non-destructive testing” (Secretariat: AFNOR, France) in collaboration w
5、ith Technical Committee ISO/TC 135/SC 6 “Leak detection methods”. The responsible German body involved in its preparation was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-08-26 AA “Leak detection methods”. Amendments This standard differs f
6、rom DIN EN 1330-8:1998-07 as follows: a) Clause 3 “Terms and definitions” has been revised; b) Clause 4.4 has been deleted; c) the standard has been editorially revised. Previous editions DIN EN 1330-8: 1998-07 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 20484 April 2017 ICS 01.040.19;
7、19.100 Supersedes EN 1330-8:1998English Version Non-destructive testing - Leak testing - Vocabulary(ISO 20484:2017) Essais non-destructifs - Contrle dtanchit - Vocabulaire (ISO 20484:2017) Zerstrungsfreie Prfung - Dichtheitsprfung - Begriffe (ISO 20484:2017) This European Standard was approved by CE
8、N on 5 February 2017. CEN members are bound to comply with the 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 standard
9、s may be obtained on application to the CEN-CENELEC Management 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 notif
10、ied to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Ice
11、land, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENE
12、LEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 20484:2017 EEuropean foreword .3Introduction 51 Scope . 62 Normative references 63 Terms and definitions . 63.1 Atomi
13、c/molecular structure . 63.2 Pressure and vacuum 63.3 Gas-solid interaction 64 Terms relating to gas 74.1 Properties of gases. 74.2 Flow of gas 75 Terms relating to test techniques . 95.1 Test techniques . 95.2 Test equipment 105.3 Test equipment components 116 Terms relating to test procedure 126.1
14、 Preparation/calibration . 126.2 Test techniques 136.3 Performance limits . 13Contents PageDIN EN ISO 20484:2017-07 EN ISO 20484:2017 (E) 2Foreword . 4European foreword This document (EN ISO 20484:2017) has been prepared by Technical Committee ISO/TC 135 “Non-destructive testing“ in collaboration wi
15、th Technical Committee CEN/TC 138 “Non-destructive testing” the secretariat of which is held by AFNOR. 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 October 2017, and conflicting national standa
16、rds shall be withdrawn at the latest by October 2017. 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 1330
17、-8:1998. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, Fr
18、ance, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 20484:2017 has been approved by CEN
19、 as EN ISO 20484:2017 without any modification. DIN EN ISO 20484:2017-07 EN ISO 20484:2017 (E)3 ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carri
20、ed 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. I
21、SO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different
22、 approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).Attention is drawn to the possibility that some of the elements of this document may
23、be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www .iso .org/ pate
24、nts).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about
25、 ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .htmlISO 20484 was prepared by the European Committee Standardization (CEN) Technical Committee CEN/TC 138, Leak testing, in collaboration wit
26、h ISO Technical Committee TC 135, Non-destructive testing, Subcommittee SC 6, Leak testing, in accordance with the agreement on technical cooperation between ISO and CEN (Vienna Agreement).This document is based on and replaces the European standard EN 1330-8:1998, Non-destructive testing Terminolog
27、y Part 8: Terms used in leak tightness testing.DIN EN ISO 20484:2017-07 EN ISO 20484:2017 (E) 4 IntroductionThe series of European standards, EN 1330, comprises 10 parts prepared separately by groups of experts, each group consisting of experts in a given NDT (non-destructive testing) method (for EN
28、 1330-3 to EN 1330-10).A comparative examination of these parts has shown the existence of common terms that are often defined differently. These terms have been taken from EN 1330-3 to EN 1330-10 and then split into two categories: general terms corresponding to other fields such as physics, electr
29、icity, metrology, etc. and already defined in international documents; these terms are the subject of EN 1330-1; common terms specific to NDT; these terms, the definitions of which have been harmonized in an Ad Hoc group, are the subject of EN 1330-2.In view of the nature of the approach taken, the
30、list of terms in EN 1330-1 and EN 1330-2 are in no way exhaustive.EN 1330 consists of the following parts: Part 1: General terms Part 2: Terms common to the non-destructive testing methods Part 3: Terms used in industrial radiographic testing Part 4: Terms used in ultrasonic testing Part 7: Terms us
31、ed in magnetic particle testing Part 9: Terms used in acoustic emission Part 10: Terms used in visual examinationNOTE 1 ISO 12718 replaced EN 13305.NOTE 2 ISO 12706 was published formerly as the draft European standard prEN 13306.DIN EN ISO 20484:2017-07 EN ISO 20484:2017 (E)5 1 ScopeThis document d
32、efines the terms used in leak testing.2 Normative referencesThere are no normative references in this document.3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.ISO and IEC maintain terminological databases for use in standardization at the following
33、 addresses: ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp IEC Electropedia: available at h t t p :/ www .electropedia .org/ 3.1 Atomic/molecular structure3.1.1concentrationcratio of the number of atoms or molecules of a given constituent in a gas mixture to the total numbe
34、r of atoms or molecules in the mixtureNote 1 to entry: For ideal gases, this is equivalent to the ratio of the partial pressure to the total pressure.Note 2 to entry: In other cases, the concentration is considered as mole fraction and the symbol used is nB.3.1.2ionization potentialminimum energy, e
35、xpressed in electronvolts, required to remove an electron from an atom or molecule or ion to form a positive ion3.2 Pressure and vacuum3.2.1atmospheric pressurepressure of the atmosphere at a specified place and time3.2.2partial pressurepA, pBpressure that would be exerted by a gas or vapour if it a
36、lone was present in an enclosure3.3 Gas-solid interaction3.3.1getteringremoval of a gas by permanent binding in or on a solid, usually involving chemical reactionDIN EN ISO 20484:2017-07 EN ISO 20484:2017 (E) 6 3.3.2occlusion of gastrapping of undissolved gas in a solid during solidification3.3.3per
37、meationmechanism of adsorption/solution/diffusion/desorption in a solid material that allows a substance to pass through under a partial pressure difference3.3.4permeability coefficientPpermcoefficient, dependent on temperature, characterizing the conductance (4.2.1) of a material for the permeation
38、 (3.3.3) of a given substance4 Terms relating to gas4.1 Properties of gases4.1.1ideal gasperfect gasgas obeying the relationship pV = nRT, where n = m/Mwherep is the pressure;V is the volume;m is the mass of the gas;M is the molecular mass;R is the ideal gas constant;T is the absolute temperature.4.
39、2 Flow of gas4.2.1conductanceCthroughput divided by the difference in mean pressures prevailing at two specified cross-sections or at either sides of the duct or orifice, assuming isothermal conditionsNote 1 to entry: Applies to fluid flow in a duct, or part of a duct, or a constriction.4.2.2flow ra
40、teqM, qN, qrate at which an amount of mass, a number of particles or moles pass through a given cross section of the systemNote 1 to entry: Mass: qM, Particles: qN, Molar: q.Note 2 to entry: For gases, the volume flow rate (Volume: symbol qv) is a measure of quantity only at specified conditions.DIN
41、 EN ISO 20484:2017-07 EN ISO 20484:2017 (E)7 4.2.3pV-throughputqGrate at which a volume of gas at specified pressure passes a given cross section of the systemNote 1 to entry: In leak detection, pV-throughput is used to express the flow rate of gas. The temperature and molar weight or density are gi
42、ven additionally so that the flow rate can be calculated using the gas equation.4.2.4resistance to flowwreciprocal of conductance (flow)4.2.5dynamic viscosity coefficientcoefficient, dependent on temperature, that defines the resistance of a specified fluid to the motion, due to the molecular intera
43、ctions4.3 Gas leakage4.3.1leakhole, porosity, permeable element or other structure in the wall of an object allowing gas to pass from one side of the wall to the other by the effect of pressure- or concentration-difference across the wall4.3.2conductance leakleak which consists of one or more discre
44、te passages, including porous areas, through which a fluid may flow4.3.3orifice leakconductance leak (4.3.2) having a diameter much greater than the leakage path lengthNote 1 to entry: It may also be considered as an opening in a very thin wall.4.3.4capillary leakconductance leak (4.3.2) in which th
45、e diameter is small compared to the length4.3.5leakage ratepV-throughput of a specific fluid which passes through a leak under specific conditions4.3.6leaktight objectobject with a leakage rate lower than that stated in a specification4.3.7molecular leakleak of such geometric configuration and under
46、 such pressure conditions that gas flowing through it obeys the laws of molecular flowDIN EN ISO 20484:2017-07 EN ISO 20484:2017 (E) 8 4.3.8standard leakage rateleakage rate of a leak with stated standard temperature and pressure at one end and, at the other end, a pressure low enough to have a negl
47、igible effect on the leakage rateNote 1 to entry: Different standard pressure- and temperature conditions are used e.g. standard temperature and pressure (STP), standard ambient temperature and pressure (SATP).4.3.9permeation leakleak which permits a gas to flow through a non-porous wall4.3.10total leakage rateintegral leakage ratesum of all leakage rates from all leaks of an object, expressed as a pV-throughput4.3.11virtual leakapparent (not real) leak, caused by mechanisms generating a signal equivalent to a leakage rate signalNote 1 to entry: Such mechanisms can be due to
