Re: [MW:24349] RE: 24334] Failure Analysis

If possible, you can also take a radiography in the same line of failure (seam or seamless) 

to check for any defects in that pipe material. 

 

C Sridhar.
Technical Adviser - Welding,
for Alsta Pristine Engineering Private Limited,. Bangalore
( SS, AL fabricators & A venture of Advance Eng. Training & Inspection Services). Chennai,

Mobile nos: 0 94449 71097, 0 7406 326326, .

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From: 'Shashank Vagal' via Materials & Welding <materials-welding@googlegroups.com>
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>; Nachiket Vagal <nachi.vagal@gmail.com>
Sent: Monday, 22 February 2016 10:10 AM
Subject: Re: [MW:24345] RE: 24334] Failure Analysis

Thanks, Alan. I have asked for more details as it is of a great general interest to all students of failure analysis. I shall make them available on this forum when received.

 

BR,

Shashank C Vagal 

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From: Alan Denney <alan@denney1.freeserve.co.uk>
To: materials-welding@googlegroups.com
Sent: Monday, 22 February 2016 3:08 AM
Subject: [MW:24341] RE: 24334] Failure Analysis

I guess it has failed during hydrotest. Really it needs more detailed pictures of the fracture and the pipe local to the fracture to give sensible opinions. The failure appears to have initiated in the parent material, which is most unusual. That central bit of the failure looks very straight, was there any type of weld there? What is the type of pipe, seamless, resistance or induction welded, submerged arc welded? It will have failed from some type of stress raiser or metallurgical discontinuity; a weld, a score in the pipe, a repair of some sort. You need to get some sections into a metallurgical laboratory for examination.

 

Alan Denney

AKD Materials Consulting Ltd

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com]
Sent: 21 February 2016 08:51
To: Bathula Raghuram (Mumbai - PIPING) <r.bathula@ticb.com>; Materials & Welding <materials-welding@googlegroups.com>
Subject: [MW:24334] Failure Analysis

 

Dear all,

Please suggest what could have caused this pipe failure after Hydrotesting..... Consider all general conditions as all details are not known yet

 

BR,

Shashank C Vagal 

 

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