Wednesday, November 26, 2014

RE: [MW:22359] Incoloy tube to tube joint welding

Ranjit,

It is highly recommend to send your QC Inspectors for the training

However, due to time constraints, maybe it is more appropriate to seek a certified welding inspector for the VT instead of asking the NDT company

 

Thank you

Best Regards

 

David Chan

 

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Ranjit Debnath
Sent: Tuesday, November 25, 2014 9:06 PM
To: materials-welding@googlegroups.com
Subject: [MW:22353] Incoloy tube to tube joint welding

 


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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