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

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

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