ISO INTERNATIONAL STANDARD 3941 Second edition 2007-09-15 Classification of fires Classes de feux Reference number ISO 3941:2007(E) @ ISO 2007 ISO 3941:2007(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHTPROTECTEDDOCUMENT ?ISO2007 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's member body in the country of the requester. ISO copyright office Case postale 56 . CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ii @ ISO 2007 - All rights reserved ISO 3941:2007(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 International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. rights.IsO shallnotbeheldresponsiblefor identifyinganyorall suchpatent rights. ISO 3941 was prepared by Technical Committee ISO/TC 21, Equipment for fire protection and fire fighting, Subcommittee SC 2, Manually transportable fire extinguishers. This second edition cancels and replaces the first edition (IsO 3941:1977), which has been technically revised @ Is 2007 - All rights reserved ii ISO 3941:2007(E) Introduction ThisInternational Standard defines classes offires according to the nature of the material undergoing combustion. In consequence, it does not define a particular class of fire involving an electrical risk. iv @ ISO 2007 -All rights reserved INTERNATIONAL STANDARD ISO 3941:2007(E) Classification of fires 1 Scope This International Standardclassifies,into five categories,thedifferentkinds offires definedinterms of the nature of the fuel. Such a classification is particularly useful in the context of fire-fighting by means of an extinguisher. 2 Definitions and designation of classes of fire The following designations are for the purpose of classifying fires of different natures and of simplifying spoken and written reference to them: Class A Fires involving solid materials, usually of an organic nature, in which combustion normally takes place with the formation of glowing embers; Class B Fires involving liquids or liquefiable solids; Class C Fires involving gases; Class D Fires involving metals; Class F Fires involving cooking media (vegetable or animal oils and fats) in cooking appliances. @ ISO 2007 - All rights reserved 1 ISO 3941:2007(E) ICS 13.220.01 Price based on 1 page @ ISO 2007 - All rights reserved 国际标准化组织ISO标准 International Organization for Standardizatior 国际标准化组织简称ISO，是一个全球性的国际标准化组织。ISO一来 源于希腊语ISOS，即EQUAL平等之意。ISO 国际标准组织成立于1947年， 中国是ISO的正式成员。IS0现有117个成员，包括117个国家和地区。 ISO的宗旨是“在世界上促进标准化及其相关活动的发展，以便于商品和服 务的国际交换，在智力、科学、技术和经济领域开展合作。”ISO通过它的 2856个技术结构开展技术活动，其中技术委员会（简称SC）共611个，工 作组（WG）2022个，特别工作组38个。 ISO标准的内容涉及广泛，从基础的紧固件、轴承各种原材料到半成 品和成品，其技术领域涉及信息技术、交通运输、农业、保