EN ISO 20484:2017

SLOVENSKI STANDARD
01-julij-2017
1DGRPHãþD
SIST EN 1330-8:2002
Neporušitvene preiskave - Preskušanje tesnosti - Slovar (ISO 20484:2017)
Non-destructive testing - Leak testing - Vocabulary (ISO 20484:2017)
Zerstörungsfreie Prüfung - Dichtheitsprüfung - Begriffe (ISO 20484:2017)
Essais non-destructifs - Contrôle d' étanchéité - Vocabulaire (ISO 20484:2017)
Ta slovenski standard je istoveten z: EN ISO 20484:2017
ICS:
01.040.19 Preskušanje (Slovarji) Testing (Vocabularies)
19.100 Neporušitveno preskušanje Non-destructive testing
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 20484
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2017
EUROPÄISCHE NORM
ICS 01.040.19; 19.100 Supersedes EN 1330-8:1998
English Version
Non-destructive testing - Leak testing - Vocabulary (ISO
20484:2017)
Essais non-destructifs - Contrôle d'étanchéité - Zerstörungsfreie Prüfung - Dichtheitsprüfung - Begriffe
Vocabulaire (ISO 20484:2017) (ISO 20484:2017)
This European Standard was approved by CEN 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 standards 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 notified 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, Iceland, 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
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20484:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 20484:2017) has been prepared by Technical Committee ISO/TC 135 "Non-
destructive testing" in collaboration with 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 standards 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 1330-8:1998.
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,
France, 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 as EN ISO 20484:2017 without any modification.

INTERNATIONAL ISO
STANDARD 20484
First edition
2017-03
Non-destructive testing — Leak testing
— Vocabulary
Essais non-destructifs — Contrôle d’étanchéité — Vocabulaire
Reference number
ISO 20484:2017(E)
©
ISO 2017
ISO 20484:2017(E)
© ISO 2017, Published in Switzerland
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ii © ISO 2017 – All rights reserved

ISO 20484:2017(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 Atomic/molecular structure . 1
3.2 Pressure and vacuum . 1
3.3 Gas-solid interaction . 1
4 Terms relating to gas . 2
4.1 Properties of gases. 2
4.2 Flow of gas . 2
5 Terms relating to test techniques . 4
5.1 Test techniques . 4
5.2 Test equipment . 5
5.3 Test equipment components. 6
6 Terms relating to test procedure . 7
6.1 Preparation/calibration . 7
6.2 Test techniques . 8
6.3 Performance limits . 8
ISO 20484:2017(E)
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.
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 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 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/ patents).
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 ISO’s adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: w w w . i s o .org/ iso/ foreword .html
ISO 20484 was prepared by the European Committee Standardization (CEN) Technical Committee
CEN/TC 138, Leak testing, in collaboration with 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
— Terminology — Part 8: Terms used in leak tightness testing.
iv © ISO 2017 – All rights reserved

ISO 20484:2017(E)
Introduction
The 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 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, electricity, 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 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 used in magnetic particle testing
— Part 9: Terms used in acoustic emission
— Part 10: Terms used in visual examination
NOTE 1 ISO 12718 replaced EN 1330–5.
NOTE 2 ISO 12706 was published formerly as the draft European standard prEN 1330–6.
INTERNATIONAL STANDARD ISO 20484:2017(E)
Non-destructive testing — Leak testing — Vocabulary
1 Scope
This document defines the terms used in leak testing.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1 Atomic/molecular structure
3.1.1
concentration
c
ratio of the number of atoms or molecules of a given constituent in a gas mixture to the total number of
atoms or molecules in the mixture
Note 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 n .
B
3.1.2
ionization potential
minimum
...