Re: [MW:24345] RE: 24334] Failure Analysis

May be the hydro test pressure exceeding the 90% of SMYS... 

Krishnasamy Masanam

QA/QC Mechanical/Welding Inspector (GIS-TUV)

Saudi Aramco Project Inspection Division,

Saudi Aramco Pipeline Inspection Unit,

TUV-NORD KSA

krishnasamy.masanam@aramco.com

+966 564 74 3358

Sent from my iPhone

On Feb 22, 2016, at 9:23 AM, Alan Denney <alan@denney1.freeserve.co.uk> wrote:

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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