1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Protective clothing - Protection against chemicals - Measurement of cumulative permeation of chemicals with low vapour pressure through materials (ISO 19918:2017)BS EN ISO 19918:2017National forewordThis British Standar
2、d is the UK implementation of EN ISO 19918:2017. It is identical to ISO 19918:2017.The UK participation in its preparation was entrusted to Technical Committee PH/3/3, Chemical, Biological, Radioactive and Nuclear Personal Protective Equipment.A list of organizations represented on this committee ca
3、n be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 87688 2ICS 13.340.10Compl
4、iance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 December 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 19918:2017
5、EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 19918November 2017ICS 13.340.10EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN Ref. No. EN ISO 19918:2017: EAll rights of
6、exploitation in any form and by any means reserved worldwide for CEN national MembersProtective clothing - Protection against chemicals - Measurement of cumulative permeation of chemicals with low vapour pressure through materials (ISO 19918:2017)Habillement de protection - Protection contre les pro
7、duits chimiques - Mesure de la permation cumule travers des matriaux des produits chimiques ayant une faible pression de vapeur (ISO 19918:2017)Schutzkleidung - Schutz gegen Chemikalien - Messung der kumulativen Permeation von Chemikalien mit niedrigem Dampfdruck durch Materialien (ISO 19918:2017)Th
8、is European Standard was approved by CEN on 15 September 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 refe
9、rences 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
10、 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,
11、 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.English VersionEN ISO 19918:2017 (E)European forewordThis document (EN I
12、SO 19918:2017) has been prepared by Technical Committee ISO/TC 94 “Personal safety - Protective clothing and equipment” in collaboration with Technical Committee CEN/TC 162 “Protective clothing including hand and arm protection and lifejackets” the secretariat of which is held by DIN.This European S
13、tandard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2018, and conflicting national standards shall be withdrawn at the latest by May 2018.Attention is drawn to the possibility that some of the elements of this d
14、ocument may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Dire
15、ctive(s).For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bul
16、garia, 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, Switze
17、rland, Turkey and the United Kingdom.2BS EN ISO 19918:2017EN ISO 19918:2017 (E)Annex ZA (informative) Relationship between this European Standard and the essential requirements of EU Directive 89/686/EEC aimed to be coveredThis European Standard has been prepared under a Commissions standardization
18、request M/031 to provide one voluntary means of conforming to essential requirements of Directive 89/686/EEC on the approximation of the laws of the Member States relating to personal protective equipment 1989 L399.Once this document is cited in the Official Journal of the European Union under that
19、Directive, compliance with the normative clauses of this standard given in Table ZA.1 confers, within the limits of the scope of this standard, a presumption of conformity with the corresponding essential requirements of that Directive and associated EFTA regulations.Table ZA.1 Correspondence betwee
20、n this International Standard and Annex II of the Directive 89/686/EEC Personal Protective EquipmentEssential Requirements of Directive 89/686/EECClause(s)/subclause(s) of this International StandardRemarks/Notes3.10.2, Protection against cutaneous and ocular contactComplete Standard Together with t
21、he require-ments in the product standardWARNING 1 Presumption of conformity stays valid only as long as a reference to this European Standard is maintained in the list published in the Official Journal of the European Union. Users of this standard should consult frequently the latest list published
22、in the Official Journal of the European Union.WARNING 2 Other Union legislation may be applicable to the product(s) falling within the scope of this standard.3BS EN ISO 19918:2017ISO 19918:2017(E)Foreword vIntroduction vi1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 35 Ap
23、paratus and supplies . 36 Test parameters . 46.1 Analytical method 46.2 Determination of extraction efficiency 56.3 Test specimens 57 Preparation of test chemical and test specimens . 68 Procedure. 68.1 Contamination . 68.2 Extraction and analysis 79 Expression of results 710 Report 811 Precision an
24、d bias . 9Annex A (informative) Schematic diagram of the permeation cell 10Annex B (normative) Drawing and measurements of the permeation cell, washer, and bolts 11Annex C (informative) Sources of permeation test cells, and permeation cell parts .13Annex D (informative) Selection of gasket and press
25、ure .14Annex E (informative) Interlaboratory test data 15Bibliography .16iv ISO 2017 All rights reservedContents PageBS EN ISO 19918:2017ISO 19918:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The w
26、ork 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-govern
27、mental, 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 t
28、he 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 poss
29、ibility 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 o
30、f 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
31、 conformity assessment, as well as information about 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.html.This document was prepared by Technical Committee ISO/TC 94, Personal safety Protective c
32、lothing and equipment, Subcommittee SC 13, Protective clothing. ISO 2017 All rights reserved vBS EN ISO 19918:2017ISO 19918:2017(E)IntroductionWhen assessing the performance of personal protective equipment (PPE) against chemical risks, it is clearly important to determine the ability of PPE materia
33、ls to resist chemical ingress. The term “ingress“ is used here specifically so as not to distinguish between penetration and permeation. Penetration is ingress through physical holes in the fabric such as pores, stitch-holes, and gaps in a protective coating. Penetration is usually quite a rapid pro
34、cess, leading to the ingress of chemical within a matter of minutes, whereas permeation is usually a slower process with molecular diffusion through a polymer or elastomer. However, from the perspective of the wearer of PPE (gloves, footwear, protective clothing) the mechanism of ingress is far less
35、 relevant than the fact that a quantity of chemical may at some point migrate through the fabric of the personal protective equipment.Standards to measure permeation are designed to measure the performance of materials that include a polymer or elastomer as the movement in these materials is at the
36、molecular level. However, although they are intended to measure movement of chemicals at a molecular level, it may be difficult to differentiate between penetration and permeation in materials with small pores, pinholes, and gaps in coating.A number of standards, including ISO 6529, EN 16523-1 and A
37、STM F739, measure permeation of chemicals that are volatile and/or soluble in water or other liquid or gaseous collection media. In the above-mentioned standards, volatility or solubility in water or other liquid that does not interact with the material allows use of gaseous or liquid collection med
38、ium. However, based on the scopes of ISO 6529, EN 16523-1 and ASTM F739, these standards are not well-suited for quantifying the ingress of chemicals and mixtures that are involatile and/or insoluble in water and other liquids that do not interact with the material being tested. This document comple
39、ments the above-mentioned standards as it is suitable for measuring chemicals that cannot be measured by other standards and vice versa.This document is intended to be used to evaluate the barrier effectiveness materials used in personal protective equipment against permeation by solid and liquid ch
40、emicals with low vapour pressure and/or low solubility in commonly used liquid and gaseous collection media. This test method is not suitable for measurement of volatile chemicals that may evaporate before the chemical analysis is complete.vi ISO 2017 All rights reservedBS EN ISO 19918:2017Protectiv
41、e clothing - Protection against chemicals - Measurement of cumulative permeation of chemicals with low vapour pressure through materials (ISO 19918:2017)1 ScopeThis document describes laboratory test methods to determine the resistance of materials, closures, and seams used in personal protective eq
42、uipment (PPE) to permeation by solid or liquid chemicals with low vapour pressure (less than 133,322 Pa at 25 C) and/or insolubility in water or other liquids commonly used as collection media. These chemicals that are often part of pesticide formulations and other mixtures cannot be measured using
43、other standards for measuring permeation. This test method is suitable for field strength and concentrated pesticide formulations as well as other mixtures in which the active ingredient is a chemical with low vapour pressure and/or low solubility in commonly used liquid and gaseous collection media
44、.This test method is not intended to be used in place of standards such as ISO 6529, EN 16523-1 and ASTM F739, which measure permeation of chemicals that are either volatile or soluble in water or other liquids that do not interact with the material being tested. This document is not suitable for me
45、asurement of volatile chemicals that may evaporate before the chemical analysis is complete.The degree of contamination depends on numerous factors, such as type of exposure, application technique, and chemical formulation. As the level of exposure can vary considerably, this method is designed to r
46、ate relative performance of PPE materials for different durations.This method is designed to measure cumulative permeation. Breakthrough time cannot be measured by this method. This test method does not measure resistance to penetration or degradation.The test method standard may be used for the eva
47、luation of PPE materials that are new or those for which the product standard requires treatment, such as laundering or simulated abrasion. Details of the treatment shall be reported.2 Normative referencesNo normative references are required for this document.3 Terms and definitionsFor the purposes
48、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/ 3.1analytical t
49、echniquemethod of quantifying the amount of permeated chemical in the collection mediumNote 1 to entry: Such methods are often specific to individual chemical and collection-medium combinations.INTERNATIONAL STANDARD ISO 19918:2017(E) ISO 2017 All rights reserved 1BS EN ISO 19918:2017ISO 19918:2017(E)3.2breakthrough detection timeelapsed time measured from the start of the test to the sampling time that immediately precedes the sampling time at which the test chemical is first detected3.3cumulative permeation masstotal amount of chemical that perme
