1、STDlBSI BS EN -L2077-ENGL 2777 M lb24bb Obb457L 348 m BRITISH STANDARD Plastics piping systems - Polyethylene piping materials and components - Determination of volatile content BS EN 12099 : 1997 BS 2782 : Part 11 : Method 1103E : 1997 * * rn The European Standard EN 12099 : 1997 has the status of
2、a British Standard ICs 23.040.20; 23.040.45; NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 12099 : 1997 direction of the Sector Board for Materiais and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 December 1997 Amd No.
3、 O BSI 1997 National foreword D Calculate the volatile materiai content, m, of the test portion using the foliowing equation: b) number of test pieces (see 4.2). 3 Apparatus where: 3.1 Dying oven equivaient position for the cup(s) (see 3.2 and 6.4). is the mass in grams of the empty weighmg 3.2 A cy
4、lindreal glass weighing cup, with a diameter cup and its lid; mg m1 is the mass in grams of the weighing cup and its lid plus the test portion; of 35 mm capable of containing a test piece (see 4.1), a minimum volume of 50 ml and a corresponding lid. 3.3 A desiccator. 3.4 An analytical balance or equ
5、ivalent, capable of weighing to the nearest 0,l mg. m.2 is the mass in grams of the weighmg cup and its lid plus the residual material after 1 h at (105 f 2) “C. 4 Bst piece 4.1 Each test piece shail comprise an approximately 25 g portion of a sample representative of the materiai before moulding or
6、 extrusion, as applicable, or cut in accordance with the referring standard from a cross section of a pipe or fitting. NOTE. If test samples utilize different sampling weights or are taken from different sources, e.g. raw material granulate or finished product, then there may be a difference in test
7、 results obtained. This may depend on e.g. the surface aredmass ratio or the maximum thickness of material. To demonstrate correlation with results for granulate samples determined in accordance with this standard, the preparation of samples from finished product may have to be modified. 4.2 The num
8、ber of test pieces shall be as specified in the referring standard. 7 Test report The test report shail include the following information: a) the reference to this standard and to the referring b) the complete identification of the test piece; c) the source and form of the material; d) the test temp
9、erature; e) the number of test portions tested; f) the calculated volatile material content, in milligrams per kilogram (mgkg) for each test portion; g) any factors which may have affected the results, such as any incidents or any operating details not specified in this standare standard; h) the dat
10、e of the test. 5 Procedure 6.1 Clean and dry a weighmg cup and its lid (3.2) until constant weight is achieved and store them in the desiccator (3.3) for at least 0,5 h at room temperature. 6.2 We the weighmg cup and its lid out of the desiccator and determine their combined mass, mo, to the nearest
11、 0,l mg. Replace the lid in the desiccator. O BSI 1997 STD-BSI BS EN L2099-ENGL 1997 lbZqbb9 Obb1157b 92T BS EN 12099 : 1997 BS 2782 : Part 11 : Method 1103E : 1997 BSI 389 ChiswickHigh Road London w4 4AL BSI - British Standards Institution BSI is the independent national body responsible for prepar
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