Galvanized Pipe in Blowoff-Blowdown Systems

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Posted by MJ Cronin on May 30, 2001 at 07:24:22:

What is the reason that galvanized pipe is not permitted in Boiler Blowoff and Blowdown systems ?

(See ASME B31.1 "Power Piping Code" para. 122.1.4 )

Is the reason because the zinc coating will pose a health hazard as it degrades due to high temperature or is there another reason ?

Thanks in advance !!

MJC

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