1、 STD.BSI BS EN 12294-ENGL 2000 m 1bZ4669 0851350 T9T m BRITISH STANDARD Plastics piping systems - Systems for hot and cold water - Test method for leaktightness under vacuum The European Standard EN 122941999 has the status of a British Standard ICs 23.040.01 NO COPYING WITHOUT BSI PERMISSION EXCEPT
2、 AS PERMITED BY COPYRIGHT LAW BS EN 12294:ZOOO BS 2782-11:Method 1123Vi2000 STD.BSI BS EN 12294-ENGL 2000 1624bb9 085L35L 92b = BS EN 122942000 been prepared under the direction of the Sector Committee for Materials and Chemicals, was published under the authority of the Standards Committee and come
3、s into effect on 15 May 2000 Amd. No. 8 BSI 05-2000 ISBN O 580 34927 6 National foreword Date Comments This British Standarc is the official English language version of EN 122M1999. The UK participation in its preparation was entrusted to Technical Committee PRV61, Plastics piping systems and compon
4、ents, which has the responsibility to: - aid enquirers to undeIstand the text; - present to the responsible European commitke any enquiries on the - monitor related intemational and European developments and promulgate interpretation, or proposals for change, and keep the UK interests informed; them
5、 in the UK A list of organizations represented on this committee can be obtained on request to its secrem. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled
6、 “International Standads Correspondence Index“, or by using the “Find“ facility of the BSI Stan b) the test pressure (see 6.2); c) the duration of test (see 6.3); d) the pressure increase which indicates a failure (see 6.3). 3 Apparatus 3.1 Vacuum source (pump), capable of producing in the test piec
7、e the partial vacuum specified in the referring standard. 3.2 Vacuum pressure measurement device, capable of measuring the pressure in the test piece with an accuracy of 10,Ol bar”). 3.3 Shutoff valve, to isolate the test piece from the vacuum source (3.1). 3.4 Thermometer(s), capable of checking co
8、nformity to the specified test temperature (see 6.1 ). 3.5 End-sealing device, of appropriate size and sealing method, for sealing the non-jointed end of the test piece. The device shall be restrained in a manner that does not exert longitudinal forces on the joints. 3.6 A typical test arrangement i
9、s shown in Figure 1. #-A A Gauge B To vacuum pump C Endseal D Joint under test Figure 1 -Typical test arrangement ) 1 bar = lo5 Nh= 100 kPa O BSI 05-2000 STDiBSI BS EN 1229q-ENGL 2000 3b24hb9 0851355 571 Page 4 EN 12294: 1999 4 Test pieces 4.1 Preparation The test piece shall comprise an assembly of
10、 pipes and/or fittings joined in accordance with the manufacturers recommended practice. The test piece shall be connected to the vacuum source (pump) via a line with a shut-off valve. The vacuum pressure measurement device shall be connected between the shut-off valve and the test piece. 4.2 Number
11、 The number of test pieces shall be as specified in the referring standard. 5 Conditioning Condition the test piece at (23 I 5) “C for at least 2 h. 6 Procedure 6.1 Ensure that during this procedure the test temperature is maintained in the range (23 f 5) “C and that variations in the test temperatu
12、re do not exceed 12 OC. 6.2 Evacuate the test piece to the test pressure specified in the referring standard. Record the time when the test pressure is achieved and close the shut-off valve. 6.3 Record the increase of pressure, if any, in the test piece until either the test period specified in the
13、referring standard has elapsed or prior failure of the test piece as indicated be an increase of internal pressure see d) of the note to clause 21. 7 Testreport The test report shall include the following information: a) a reference to this standard and to the referring standard; b) the identificati
14、on and the number of the components under test including their operating pressure; c) the test temperature; d) the test duration; e) the test pressure and, if any, the pressure increase; 9 any factors which may have affected the results, such as any incidents or any operating details not specified i
15、n this standard; g) the date of test. O BSI 05-2000 BS EN 12294:2000 BS 2782-1 1:Method 1123l?2000 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 Eu
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