The influence of the flange surface roughness.
表面粗糙度的影响。
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。
Interface leak So, gaskets are different, the requirements of the flange surface roughness is not the same.
所以，垫片不同，所要求的法兰表面粗糙度也不相同。
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