Generally flange materials will be subjected to additional heat treatment and special processes like forging etc.
To make sure qualification weld makes a sound joint between pipe and specially treated flange material, it is recommended to qualify welding procedure with pipe and flange when welding of flanges is involved.
Reputed flange manufacturers will also supply special puff pieces of same dimensions of pipe undergone same heat treatment and other processes of flanges on request and these can be straightly welded to pipe piece and easy to machine for welding tests.
Regards,
Ramakrishna
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of
Sent: Monday, February 08, 2010 12:05 PM
To: materials-welding@googlegroups.com
Subject: [MW:4241] WPS
Hi all,
Could one clarify the reason behind using pipe to flange for qualifcation of a welding procedure.
Why pipe to pipe is not used?
thanx
wi
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