|
|
谁做过IEC 60950-22 Equipment to be installed outdoors中的附录D Gasket tests？* ~7 A* G( q( A0 E: }( M& I
+ G+ c0 G# n' j$ L其中的
2 f6 q5 R$ |: B4 w2 ^7 {+ rD.2 Tensile strength and elongation tests0 i0 B- F. b* X
This test is applicable to gaskets, which can stretch (such as O-rings). Gasket material, shall
- [" W# |. _8 E$ d) Dbe of such quality that samples subjected to a temperature of 69 °C to 70 °C in circulating air" A" N* V' p2 j% u- `
for 168 h have a tensile strength of not less than 75 % and an elongation of not less than
# k* }$ g( |. w0 a* [60 % of values determined for unaged samples. At the conclusion of the tests, there shall be
) B$ i8 o* m! s* X1 ]5 r$ Dno visible deterioration, deformation, melting, or cracking of the material and the material
; }9 X [# {$ X3 m' i) A: y, kshall not harden as determined by normal hand flexing.
) g/ K% T$ |& j# n4 s) |! A7 u- S) C* C
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。 |
|
/1 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
发表于 2009-2-17 14:54
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡
楼主