[MW:2091] pressure class

----- Forwarded Message ----
From: Ali Asghari <asghariali@rocketmail.com>
To: materials-welding@googlegroups.com
Sent: Monday, May 4, 2009 7:42:06 AM
Subject: Fw: pressure class

hi

can  anybody explain .how is it possible that a product such as flange made from a given material can have different pressure classes?if the fabrication process is also same ,how?

regard advanc

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