To soft gaskets, flange surface too smooth adverse instead, because right now happened resistance smaller.
对软质垫片，法兰面过于光滑反而不利，因为此时发生界面泄露阻力变小了。
2
Three methods to judge the electric leakage of flange are put forward, that is, current direction method, pipeline current method and earth resistance method.
就绝缘法兰是否漏电，提出了电流方向法、管道电流法及接地电阻法等判断方法。
3
Second, the flange should be supporting the sealing gasket should have good oil resistance and aging resistance, as well as good flexibility and mechanical strength.