Wednesday, November 26, 2014

Re: [MW:22368] Incoloy tube to tube joint welding

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Principally RT. What is your thickness?

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    Dr. Georgios Dilintas

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Ranjit Debnath ---25/11/2014 16:14:42---We are welding incoloy tube to tube joint using incoloy filler wire. PQR as per ASME is qualified. P

From: Ranjit Debnath <ranjit.deb87@gmail.com>
To: materials-welding@googlegroups.com
Date: 25/11/2014 16:14
Subject: [MW:22353] Incoloy tube to tube joint welding
Sent by: materials-welding@googlegroups.com





We are welding incoloy tube to tube joint using incoloy filler wire. PQR as per ASME is qualified. PT, RT, hydrotest of joint is acceptable. After bending this tube, when we conducted PT on the weld joint, one surface indication was noticed. This indication disappeared after filing. We cut this joint circumferentially and did micro and macro test. In macro, we found some crack like indication in weld joint.

Can anyone help to analyse and give root cause for this? Which other NDT method we can employ to ensure that all other welded joints do not have these cracks?

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REGARDS,
RANJIT
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