butterfly valve

From: <mehdi>
Date: Thu Oct 07 2004 - 15:10:00 EDT

Hi Dear friends,
Do you any standard or code that it has referred to using of butterfly valve in natural gas piping?
Best regards,
Mehdi orojlu



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[Non-text portions of this message have been removed] Received on Thu Oct 07 15:10:00 2004

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