Is it necessary for manhole covers with gaskets to be airtight?

2017-06-14View Original

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I would like to ask fellow sailors: do manhole covers or flange covers with gasket rings require a gas-tightness test? Are there any specific size requirements?

Reply #22017-06-14

For details, see HG/T 21594–21604-2014, Manholes and Handholes with Stainless Steel Linings, Page P16, Clause 4.3

Reply #32017-06-14

Thank you; it was your reminder that made me look at it carefully

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Is it necessary for manhole covers with gaskets to be airtight?

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