EN 12118-1997 en Plastics Piping Systems - Determination of Moisture Content in Thermoplastics by Coulometry《塑料管道系统 用电量分析法对热塑性塑料中水分含量的测定》.pdf

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1、STD-BSI BS EN LZL1B-ENGL 1998 D Lb24bb9 Ob89b99 7b0 BRITISH STANDARD Plastics piping systems - Determination of moisture content in thermoplastics by coulometry The European Standard EN 12118 : 1997 has the status of a British Standard ICs 23.040.20 BS EN 12118 : 1998 BS 2782 : Part 11 : Method 1103

2、C 1998 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW _ STDmBSI BS EN LZLLB-ENGL 1778 Lb29bbS Ob89700 202 AmdNo. BS EN 12118 : 1998 Date Text affected National foreword This British Standard is the English language version of EN 12118 : 1997, published by the European Committ

3、ee for Standaraon (CEN). This standard has the secondary idenaer BS 2782 : Part 11 : Method 1103C, 90 that it is crossreferenced within the existing series of British Standards which cover related test methods for plastics materials and plastics piping components. The UK participation in its prepara

4、ton was entrusted to Technical Committee PRV61, Plastics piping systems and components, which has the responsibility to: - aid enquirem to understand the te*, - present to the responsible European committee any enquiries on the inteqwetation, or proposais for change, and keep the UK interests inform

5、ed; - monitor related internationaJ and European developments and promuigak them in the UK. A list of organizaons represented on this committee can be obtained on request to its secretary. The test method supports other standards that axe in preparation by CEN for the specification of plastics pipin

6、g and ducting systems and components. It may be used for the revision or amendment of other nationai standards, but it should not be presumed to apply to any existang standard or specification which contains or makes reference to a different test method until that sta,ndard/specifidon has been amend

7、ed or revised to make reference to this method. Cross-references The British Standards which implement intedonal or European publidos referred to in this document may be found in the BSI standards Catalogue under the section entitled Internationai Standards Correspondence Index, or by using the Find

8、 facfity of the BSI Standards Electronic Catalogue. WARNING. This British Standard, which is identical with EN 12118 : 1997, does not necessarily detaii all the precautions necessary to meet the requirements of the Health and Safety at Work etc. Act 1974. Attention should be paid to any appropriate

9、safety precautions and the method should be operated only by trained personnel Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a hnt cover, an inside front cover, the EN tide page, pages 2 to 4, an inside back cov

10、er and a back cover. This British Standard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 16 March 1998 O BSI 1998 ISBN O 580 29106 7 STD.BS1 BS EN LZLLB-ENGL 1798 D 1bZLibbS

11、 Ob87701 147 = EUROPEAN sTANDAEI;D NOFiME EUROPXNNE EUROPATSCHE NORM EN 12118 August 1997 ICs 83.080.20; 83.140.30 Descriptors: Plastic tubes, plastics, chemical analysis, determination of content, water, coulometric methods English version Plastics piping systems- Detemon of moisture content in the

12、rmoplastics by coulometry Kunststoff-Rohrleiitungssysteme - EWimmung des Feuchtegehaites in “hermoplasten mittels Systmes de canalisati om en plastiques - Dtermhation par coulomtne de la teneur en eau dans les matires thermoplastiques Coulometne This European Standard was approved by CEN on 1997-052

13、8. CEN members are bound to comply with the CENICENELEC Intemal 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

14、 application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, bench, German). A version in any other language made by hnslation under the responsibility of a CEN member into its own language and notified to the Central Secretariat ha

15、s the same status as the officiai versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Gennany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugai, Spain, Sweden, Switzerland and United Kingdom. CEN European Co

16、mmittee for Standardization Comitk Europen de Normahsation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1060 Brussels O 1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12118 : 1997 E STDDBSI BS EN

17、LZItL8-ENGL 1778 D Lb29bb7 Ob87702 085 M Page 2 EN 12118 : 1997 Foreword This European Standard has been prepared by Technid committee CENITC 155, Plastics piping systems and ducting systems, the secretariat of which is held by NNI. The materiaidependent parametem and/or performance requirements are

18、 incorporated in the system standard) concerned This standard is one of a series of sandards on test methods which support system standards for plastics piping systems and ducting systems. This European Standard shall be given the status of a nationai standard, either by publication of an identical

19、text or by endorsement, at the latest by Febniary 1998, and confiictjng nationai standards shall be withdrawn at the latest by February 1998. According to the CENKENELEC Internal Regulations, the national standards organizations of the foilowing countries are bound to implement this European Standar

20、a Austria, Belgium, Czech Republic, Denmark, Fjnand, France, Ge-, Greece, Iceland, Ireland, Ita b) the number of test pieces (see 6.2). 3 Materials 3.1 Phosphorus pentoxide (analytical grade). 3.2 Dry nitrogen, containing less than 5 ppm) water content. 4 Apparatus 4.1 Equipment for reference purpos

21、es 4.1.1 Moisture analyser, with oven temperature capable of being controlled at (165 5) OC and capable of measuring quantities of water by mass to an accuracy of within 0,l mg, typically by use of a counter to measure energy consumption related to the mass of water involved. 4.1.2 Nitrogen supply r

22、egulator, capable of providing a flow rate of (70 f 10) mlhnin. 4.1.3 Weighing cup, of corrosion-resistant material, e.g. nickel. 4.1.4 Weighing scale, with accuracy of 0,Ol mg. 4.1.6 CapiUarg glass tube, of 2 cr,l capacity, with connections to suit the moisture analyser. 4.2 Alternative equipment A

23、lternative equipment to that described in 4.1 may be used, provided that a correlation can be demonstsated with the results obtained using equipment conforming to 4.1. Page 3 EN 12118 : 1997 5 Tbst pieces 6.1 Preparation The test piece shall comprise a portion of 0,6 g to 0,7 g from a sample of gran

24、ular material or cut from an end-product. The source and form of the sample shali be as specified in the referring standard. 6.2 Number The number of test pieces shaii be as specified in the referring standard. 6 Procedure 6.1 General This procedure assumes the use of a counter as described in 4.1.

25、For other forms of read-out (see 4.2), it is necessary to mod the procedure or calculations accordingly to suit readings obtained in place of Qs is the test portion piece count number, in micrograms (la); mg is the actual mass of the test portion piece, in grams (g); m, is the total moisture content

26、, in ( b) full identifcation of the test piece; c) the calibration factor, fc; d) the total moisture content, % in milligrams per kiiogram (mgkg) (see 6.3.6) or in percent mass; e) any factors which may have affected the results, such as any incidents or any operating details not specified in this s

27、tank f) the date of test. O BSI 1998 BS EN 12118 : 1998 BS 2782 : Part 11 : Method 1103C : 1998 BSI 389 Chiswick High Road London w4 4AL BSI - British Standards Institution BSI is the independent national body responsible for preparing British standards. It presents the UK view on standards in Europ

28、e and at the international level. It is incorporated by Royal Charter. Contract requirements 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. Revisions British Standards are updated by

29、amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. 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 Standa

30、rd would inform the Secrelay of the responsible technical committee, the identity of which can be found on the inside front cover. Tel 0181 996 9000; Fax: 0181 996 7400. BSI offers members an individual updating service ded PLUS which ensures that subscribers automatically receive the latest edition

31、s of standads. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services, Sales Department at Chiswick Tel 0181 996 7000; Fax: 0181 996 7001. In response to orders for international standards, it is BSI policy to supply the BSI imp

32、lementation of those that have been published as British Standards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Libmy, the Stanhme Database, the BSI Information Technology Service (BITS) a

33、nd its Technical Help to Exporters Service. Contact the Information Department at Chiswick Tel: 0181 996 7111; Fax 0181 996 7048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounls on the purchase price of standads. For details of these and o

34、ther benefits contact Customer Services, Membership at Chiswick Tel 0181 996 7002; Fax: 0181 996 7001. Copyright Copyright subsists in all BSI publications. BSI also holds the copyIight, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyrig

35、ht, Designs and Patents Act 1988 no extract may be reproduced, stored in a retried system or transmitted in any form or by any means - electronic, photocopying, recordmg or otherwise - without prior written permission from BSI. This does not preclude the free use, in the come of implementing the sta

36、ndard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtain& If permission is granted, the tem may include royalty payments or a licensing agreement. DeW and advice can be obtained from the Copyright Manager, BSI, 389 Chiswick High Road, London W4 4AL.

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