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谁做过IEC 60950-22 Equipment to be installed outdoors中的附录D Gasket tests?- K0 b3 t3 Q V3 R4 _
8 W% I) x! A* [( B其中的
' p x; F* M6 o5 y. FD.2 Tensile strength and elongation tests
1 d- F/ I' t0 @, x' l! T0 GThis test is applicable to gaskets, which can stretch (such as O-rings). Gasket material, shall n! n {# N) l& J3 q* Z
be of such quality that samples subjected to a temperature of 69 °C to 70 °C in circulating air0 n5 ^( q* d: Y
for 168 h have a tensile strength of not less than 75 % and an elongation of not less than
8 @. w* P3 z, Q, e60 % of values determined for unaged samples. At the conclusion of the tests, there shall be
9 ~7 V* s+ z: q2 S9 c- R9 lno visible deterioration, deformation, melting, or cracking of the material and the material
/ R: B+ V2 [# v# g' \1 V2 Mshall not harden as determined by normal hand flexing.8 O- j" F! I! a, \3 u
0 n8 j- P1 i7 A5 K7 y( h( B q这里抗拉强度和伸长率怎么测定?试验方法如何?有参考标准吗?950-22这部分讲的太含糊了。 |
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