Please clarify whether the backing strip was left in place or removed after welding. If the backing strip is left in place, there could be slag entrapment between the base metal and backing strip which will interfere with the interpretation of RT film. The alternative in such case is to have a tight fit joint and weld the root pass with GTAW.
Good luck
Gopu
--- On Mon, 6/8/12, syed moinul hasan <mhsyed1@gmail.com> wrote:
From: syed moinul hasan <mhsyed1@gmail.com>
Subject: Re: [MW:15030] carbon steel back strip
To: materials-welding@googlegroups.com
Date: Monday, 6 August, 2012, 9:42 AM
Back strip is nothing to do with any defects for RT interpretation, as long as welder is skilled & experienced. On 5 August 2012 15:09, chiluka venkatramulu <ramuluchiluka@gmail.com> wrote: Back strip will not be considered for RT interpretation.
CVR On Wed, Jun 20, 2012 at 11:54 PM, eng ahmed <eng_ahmed450@yahoo.com> wrote: Dear All I had problem to weld pipe A53GrB using carbon steel back strip techniqe in RT interpretation,May i know the defects of welding the pipes using carbon steel back strip A109 type by GTAW process. Best Regards --
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