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Flange face finish defect acceptance

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mariolucas75

mariolucas75

Civil/Environmental
Sep 21, 2010
76
Dear forum,

Please help me with the understanding of Flange face finish defect acceptance.
In general in service flange face finish defect acceptance criteria is given in ASME PCC-1 Appendix D.
But i have a following question - when pitting / gouges are close to each other on sealing face - we can sum their radial projection and and evaluate afterwards...
But if pitting / gouges are far away from each other (still being on the same radius) what happens then - do we have the same approach and sum their individual radial projections?
Please find attached picture for reference...

Thank you so much...
Flanges_Questions_swkr6g.png
 
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Is this flange inservice or is a new one?
Depth of pitting?
Flange diameter, Class and material?

Regards
 
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If they're far way from each other, just evaluate each defect on its own. PCC-1 gives proximity requirements.
 
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