Re: [PipingDesign] ANSI B16.5 Flange - Gasket Face Machining Allowance

From: <John>
Date: Wed Aug 08 2007 - 07:29:00 EDT

Why not repair weld overlay the gouge and then machine off???

Best Regards,
John C. Luf
Cleveland Ohio U.S.A when I'm not in Austria

Member B31.3, Piping Engineer - Stress Analysis, Pipe Supports, Component Design, and Surge Analysis... according to my daughters master of unimportant trivia

             Gents

Just had a gasket blow on a piping joint, bugger. The gasket is between

a branch stub flange and a blind flange. The vent stream has cut a

groove in the raised face portion of the blind flange. Its 40NB Class

900 with 32mm "hub" thickness plus 7mm raised face; 39mm overall.

As far as I recall, it is permissible, by code, to machine damage off

the raised face portion provided the finished overall thickness is not

less than the minimum hub thickness (32mm).

Anyone recall what the rule actually is, and where I can locate it?

Thanks

Steve

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[Non-text portions of this message have been removed] Received on Wed Aug 08 07:29:00 2007

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