ISO-13338-1995.pdf
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1、INTERNATIONAL STANDARD First edition 1995-11-15 Determination of tissue corrosiveness of a gas or gas mixture Dbtermination de Ia corrosivitb des gaz ou mklanges de gaz sur /es tissus Reference number ISO 13338:1995(E) Copyright International Organization for Standardization Provided by IHS under li
2、cense with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:58:21 MDTNo reproduction or networking permitted without license from IHS -,-,- Foreword ISO (the International Organization for Standardization) is a worldwide federation of national Standards bodies (ISO me
3、mber bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Esch 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, governme
4、ntal and non-governmental, in liaison with ISO, also take patt in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the me
5、mber bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 13338 was prepared by Technical Committee iSO/TC 58, Gas cyhnders, Subcommittee SC 2, Cyhder fittings. Annex A of this international Sta
6、ndard is for information only. 0 ISO 1995 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronie or mechanical, including photocopying and microfilm, without Permission in writing from the publisher. Internat
7、ional Organization for Standardization Case Postale 56 l CH-121 1 Geneve 20 l Switzerland Printed in Switzerland Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:58:21 MDTNo re
8、production or networking permitted without license from IHS -,-,- 0 ISO ISO 13338:1995(E) Introduction The purpose of ISO 5145 is to establish practical criteria for the determi- nation of outlet connections of gas cylinders of water capacity 150 litres or less. These criteria are based on certain p
9、hysicochemical properties of the gases, in particular their corrosiveness. One of the difficulties in the application of ISO 5145 resides in the ab- sence of criteria for classifying the corrosiveness level of a gas or a gas mixture. In fact, - in the case of pure gases, there are few data in the li
10、terature, but above all, - in the case of gas mixtures, these data are very often nonexistent. Investigation has shown that there is no correlation between the toxicity values defined by LC50 (see ISO 10298) and corrosiveness. . . . Ill Copyright International Organization for Standardization Provid
11、ed by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:58:21 MDTNo reproduction or networking permitted without license from IHS -,-,- This page i ntention ally left blank Copyright International Organization for Standardization Provided by IHS
12、under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:58:21 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD 0 ISO ISO 13338:1995(E) Determination of tissue corrosiveness of a gas or gas mixture 1 Scope Thi
13、s International Standard gives - for pure gases: a complete list indicating their corrosiveness, - for gas mixtures: a calculation method, in the absence of experimental data, relating to the corrosiveness of each of their components, in Order to determine the corrosiveness of gases and gas mixtures
14、 on tissue so that a suitable outlet connection tan be assigned to each of them. 2 Normative reference The following Standard contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the edition indicated was valid.
15、All Standards are subject to re- Vision, and Parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the Standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standa
16、rds. ISO 5145: 1990, Cylinder valve outlets for gases and gas mixtures - Selection and dimensioning. 3 Definitions and Symbols 3.1 Definitions For the purposes of this International Standard, the following definitions apply. 3.1.1 tissue corrosiveness of gases or gas mixtures: Ability of a gas to da
17、rnage or destroy living tissues (eyes, skin and mucous membranes). 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:58:21 MDTNo reproduction or networking permitted without l
18、icense from IHS -,-,- ISO 13338:1995(E) 0 ISO 3.1.2 irritant gas: Gas which may Cause a temporary reaction to the skin, eyes and mucous membranes. NOTE 1 An irritant gas is regarded for the purposes of ISO 5145 as noncorrosive. 3.2 Symbols L4 V limit volume C indicates a corrosive component c+ indic
19、ates a very corrosive component i indicates an irritant component nc indicates an noncorrosive component 4 Classification Two levels of corrosiveness are defined (C+: very culation method for the corrosiveness of mixtures. corrosive, C: corrosive), to provide greater accuracy in the cal- In accordan
20、ce with the above, gases are classified into the following categories: C+: very corrosive corrosive in the sense of ISO 5145 C: corrosive i: irritant noncorrosive in the sense of ISO 5145 nc: noncorrosive, non-irritant For a complete definition for purpose s of the gas cylinder at the bottom of tabl
21、e 1 shall also be taken in to account: connection, the subdivisions of the FTSC code defined 0: noncorrosive, non-irritant (nc) 1: forms nonhalogen acids (C+, C or i) 2: basic (C+, C or i) 3: forms halogen acids (C+, C or i) 5 Categories of corrosiveness for pure gases The corrosiveness category of
22、each gas (C+, C, i or nc) corresponding to the classification defined in clause 4 is shown in table 1. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:58:21 MDTNo reproduction
23、 or networking permitted without license from IHS -,-,- ISO 13338:4995(E) Table 1 - Corrosiweness categories of pure gases I Group No. Gas name Chemical formula Synonym / careg I - I I I I rwnn Corrosiveness -*- lory 7 Ammonia Nt-43 R717 0202 C 4 Antimony pentafluoride SbF, 0303 Ci 8 Arsine AsH, 230
24、0 nc I 12 1 Bis-(trifluoromethyl)peroxide W,),O, I 1 4300 nc I 4 I Boron trichloride I BCI, I Boron chloride C I 4 I Boron trifluoride I BF3 I Boron fluoride 1 0253 1 C+ I 12 Bromine pentafluoride I BrF, I 1 4303 1 c+ I 12 I Bromine trifluoride I BrF, I 1 4303 1 c+ I 4 I Bromoacetone I CH,COCH,Br 1
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