1、 CEN EN*ISO*L723 75 3404589 009bOLO 665 H BRITISH STANDARD Cellular plastics and rubbers - Determination of linear dimensions The European Standard EN IS0 1923 : 1995 has the status of a British Standard BS EN IS0 1923 : 1995 CEN EN*ISO*L923 95 I 3404589 009bOLL 5TL I 15 July 1995 Amd. No. Date O BS
2、I 1995 BS EN IS0 1923 : 1995 %xt affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee PRI/24, Test methods for cellular plastics and rubbers, upon which the following bodies were represented: British Plastics Federati
3、on British Railways Board British Rigid Urethane Foam Manufacturers Association British Rubber Manufacturers Association Ltd. Department of the Environment (Building Research Establishment) Furniture Industry Research Association Furniture, Timber and Allied Trades Union Ministry of Defence National
4、 Bed Federation Limited Phenolic Foam Manufacturers Association RAPRA Bchnology Ltd. Society of British Aerospace Companies Limited Society of Motor Manufacturers and Traders Limited The following BSI references relate to the work on this standard: Committee reference PRI24 Draft for comment 94/3006
5、09 DC ISBN O 580 23783 4 CEN EN*ISO*1923 95 I 304589 0076012 438 I BS EN IS0 1923 : 1995 Contents Committees responsible National foreword Page Inside front cover i Foreword 2 Specification 1 2 Definition Scope and field of application 3 3 3 Measuring equipment 3 4 Procedure 3 5 Report 4 Annex Examp
6、le of apparatus conforming to the applications in 3.1 5 CEN EN*IS0*1723 75 m 3404589 0076013 374 m BS EN IS0 1293 : 1995 National foreword This British Standard has been prepared by Technical Committee PRI24, and is the English language version of EN IS0 1923 : 1995 Celluhr plastics and rubbers - De
7、tmmination of linear dimensions published by the European Committee for Standardization (CEN) which is identical with IS0 1923 : 1981, published by the International Organization for Standardization (ISO). This British Standard supersedes method 1 of BS 4730 : part 1 : 1988 and method 1 of BS 4443 :
8、 Part 1 : 1988, which are deleted by amendment. Compliance with a British Standard does not of itself confer immunity from legal obligations. ii CEN EN*ISO*L923 95 3404589 0096014 200 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IS0 1923 May 1995 ICs 83.100 Descriptors: Cellular materials, d
9、imensional measurement English version Cellular plastics and rubbers - Determination of linear dimensions (IS0 1923 : 1981) Plastiques et caoutchoucs alvolaires - Dtermination des dimensions linaires (IS0 1923 : 1981) (IS0 1923 : 1981) Schaumstoffe und Schaumgummis - Bestimmung der linearen Abmessun
10、gen This European Standard was approved by CEN on 1995-05-11. CEN members are bound to comply with the CENXENELEC Internal 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 refer
11、ences 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, German). A version in any other language made by translation under the responsibility of a CEN member in
12、to 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, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, S
13、witzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B- 1050 Brussels O 1995 Copyright reserved to CEN memberc Ref. No. EN IS0 1923 : 1995 E CEN EN*ISO*L923 95 m 3404589 009601
14、5 147 m Page 2 EN IS0 1923 : 1995 Foreword The text of the international standard from ISO/TC 61, Plastics, of the International Organization for Standardization (ISO) has been taken over as a European Standard by the Tkchnical Committee CEN/TC 249, Plastics. The European Standard shall be given the
15、 status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 1995, and conflicting national standards shall be withdrawn at the latest by November 1995. In accordance with the CENKENELEC Internal Regulations, the following countries are boun
16、d to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom. This European Standard should not be used for cellular plastics and rubber materials for
17、 use as thermal insulation in building applications. Determination of dimensions of these products is covered by EN 822 Thermal insulating products for building applications - Determination of length and width, and by EN 823 Thermal insulating products for building applications - Determination of th
18、ickness. CEN EN*ISO*L923 95 3404589 009bOLb 083 Page 3 EN IS0 1923 : 1995 Cellular plastics and rubbers - Determination of linear dimensions 1 Scope and field of application This International Standard specifies the characteristics and the choice of the measuring equipment and procedure for deter- m
19、ination of the linear dimensions of sheets, blocks or test specimens of cellular material (flexible and rigid). 2 Definition For the purposes of this International Standard the following definition applies : linear dimension : The shortest distance, measured with an instrument according to clause 3,
20、 between two specific points, between two parallel lines or between two parallel planes, defined by corners, edges or surfaces of the cellular specimen. 3 Measuring equipment 3.1 Dial gauge with a measuring surface of about 10 cd. The gauging pressure shall be 100 k 10 Pall and the reading accuracy
21、shall be O, b) type and designation of the cellular material; c) measuring equipment used; d) dimensions in millimetres, rounded off to 0,l mrn for measurements made with dial gauge or micrometer, rounded off to 0.2 mm for measurements with sliding caliper, and rounded off to 1 mm for measurements w
22、ith metal rule or metal tape; e) any deviations from the specified test procedure. CEN EN*ISO*L923 95 3404589 009bOl18 956 Page 5 EN IS0 1923 : 1995 Annex Example of apparatus conforming to the specifications in 3.1 The apparatus consists of the following parts : a) base plate, with adjustable suppo
23、rt to accommodate the dimension to be measured; b) screw micrometer, reading 0.05 mm or better; c) aluminium plate of area 10 cmZ, to be placed on the test specimen and connected to an electric circuit, consisting of flexible wire, a battery and a lamp; the mass of the plate should be such that a pr
24、essure of 100 f 10 Pa is exerted on the test specimen; d) calibrated spacer gauge blocks, with a tolerance of 0,Ol mm, selected according to the dimension to be measured. The reading should be taken at the moment the lamp glow. -3-1 Screw micrometer, reading 0.05 mm or better Miltimetre scale II I I
25、 - IC Aluminium plate 1 L Test sliecimen * 1 Adjustable support CEN EN*ISO*L923 95 3404589 0096039 892 = BS EN IS0 1923 : 1995 BSI 389 Chiswick High Road London W4 4AL 9507- 5- 0.6k- FP BSI is the independent national body responsible for preparing British Standards. It presents the UK view on stand
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