《BS-EN-ISO-172-1998.pdf》由会员分享，可在线阅读，更多相关《BS-EN-ISO-172-1998.pdf（8页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS EN ISO 172:1998 Implementing Amendment No. 1 to BS 2782-4: Method 451L:1980 (renumbers the BS as BS EN ISO 172:1998) not published separately Plastics Phenol-formaldehyde mouldings Detection of free ammonia (ISO 172:1978) ICS 83.140.99 Licensed Copy: sheffieldun sheffieldun, na,
2、Mon Nov 20 02:09:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 172:1998 BSI 05-1999 ISBN 0 580 11301 9 Foreword This British Standard is technically identical to International Standard ISO 172:1978 Plastics Phenol-formaldehyde mouldings Detection of free ammonia. In 1998 the European Commi
3、ttee for Standardization (CEN) accepted ISO 172:1978 as European Standard EN ISO 172:1998. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not
4、of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN ISO title page, pages 2 and 3 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This w
5、ill be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments 10253October 1998Implementing European Standard Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:09:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 172:1998 BS
6、I 05-1999i Contents Page National forewordInside front cover Foreword2 Text of EN ISO 1723 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:09:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:09:13 GMT+00:00 2006, Uncontrolled
7、Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 172 July 1998 ICS 83.080.10 Descriptors: See ISO document English version Plastics Phenol-formaldehyde mouldings Detection of free ammonia (ISO 172:1978) Plastiques Pices moules base de phnoplastes Recherche de la prsence dammoni
8、ac libre (ISO 172:1978) Kunststoffe Phenoplast-Formteile Nachweis von freiem Ammoniak (ISO 172:1978) This European Standard was approved by CEN on 12 June 1998. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
9、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 Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, Germ
10、an). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Fi
11、nland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050
12、Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref. No. EN ISO 172:1998 E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:09:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 172:1998 BSI 05-1999 2 Foreword The text
13、of the International Standard from Technical Committee ISO/TC 61, Plastics, of the International Organization for Standardization (ISO) has been taken over as a European Standard by Technical Committee CEN/TC 249, Plastics, the secretariat of which is held by IBN. This European Standard shall be giv
14、en the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 1999, and conflicting national standards shall be withdrawn at the latest by January 1999. According to CEN/CENELEC Internal Regulations, the national standards organizations
15、of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of
16、 the International Standard ISO 172:1978 has been approved by CEN as a European Standard without any modification. Contents Page Foreword2 1Scope and field of application3 2Principle3 3Apparatus3 4Preparation of test sample3 5Procedure3 6Expression of results3 7Test report3 Licensed Copy: sheffieldu
17、n sheffieldun, na, Mon Nov 20 02:09:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 172:1998 BSI 05-19993 1 Scope and field of application This International Standard specifies a qualitative method of detecting the presence of free ammonia or other volatile bases in phenol-formaldehyde moulding
18、s by the exposure of an indicator paper to the vapour from a powdered sample. It may be used when the absence of free ammonia is a requirement. 2 Principle Detection of alkaline vapours from a powdered test portion, contained in a sealed flask, by means of universal indicator paper. 3 Apparatus 3.1
19、Means for reducing the mouldings to a powder. 3.2 Balance, accurate to 0,01 g. 3.3 Glass-stoppered flask, capacity 50 ml. 3.4 Universal indicator test paper, pH range 1,0 to 11,0. 4 Preparation of test sample Reduce a fully representative sample of the mouldings to powder by filing, milling, grindin
20、g, turning or drilling, taking care that no undue heating of the material occurs. The prepared sample shall be tested (see clause 5) without delay. 5 Procedure Weigh a test portion of approximately 1 g of the test sample (clause 4) and, without delay, place it in the flask (3.3). Quickly stopper the
21、 flask, placing a strip of universal indicator paper (3.4), moistened with distilled water, between the stopper and the flask so that the end of the paper projects into the flask. Take care that the paper does not come into contact with the test portion. After 30 min, examine the colour of the indic
22、ator paper and note any change. 6 Expression of results If the indicator paper does not change colour, report that the moulding does not contain free ammonia or other volatile bases. If the indicator paper changes colour, indicating the presence of alkaline vapours, report that the moulding contains
23、 free ammonia or other volatile bases. 7 Test report The test report shall include the following particulars: a) reference to this International Standard; b) full details necessary for the identification of the sample; c) the method used for reducing the mouldings to powder; d) the presence or absen
24、ce of free ammonia or other volatile bases. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:09:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 172:1998 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for pr
25、eparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or edit
26、ions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the in
27、side front cover. Tel: 020 8996 9000. Fax: 020 8996 7400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, international and foreign standards publications should
28、be addressed to Customer Services. Tel: 020 8996 9001. Fax: 020 8996 7001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested. Information on standards BSI provides a
29、wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel: 020 89
30、96 7111. Fax: 020 8996 7048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel: 020 8996 7002. Fax: 020 8996 7001. Copyright C
31、opyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any
32、form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be use
33、d for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:09:13 GMT+00:00 2006, Uncontrolled Copy, (c) BSI