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[MW:530] Re: Pressure Vessel failure during Hydrotest in China - Nov 07

By Materials & Welding
Yes, I beleive the same thing which every one of us would like to know.
I have forwarded to one technology person. Whenever I rec've the findings,
I will certailly send to all.

Best Regards,
Sudipto Banerjee
Man. no. B 4512
Equipment Engg. Department
Office no. 0044-(0)118-913 2295
Fax. 0044-(0)118-913 6680



"Bathula Raghuram (Mumbai
- PIPING)"
<R.Bathula@ticb.com> To
Sent by: materials-welding@googlegroups.com
materials-welding@googleg cc
roups.com PED2000@googlegroups.com
Subject
[MW:529] Pressure Vessel failure during Hydrotest in
25/01/2008 09:15 China - Nov 07


Please respond to
materials-welding@googleg
roups.com






Dear Members

Our curiosity does not end after just seeing the pictures, is n�t it? We
must find out the real reasons and failure causes, is it a designers,
material selection/supply, fabrication, PWHT�.. Where is the fault lie? The
lack of information provided with the impressive set of pictures begs a lot
questions concerning the failure.

Viz: What is the metallurgy? Thickness? Is it a Cr-Mo steel? Was it
properly preheated and PWHT'd? Was the vessel correctly designed per the
appropriate code? Were the welds acceptable and per code?

We can see a fractured thick shell around a reinforced opening. Looks
like internal lining. Is it clad or a camera flash?

Please if someone has more details of this failure, I would like to know.

The only conclusion I draw from this is that we should continue to be
critical of material sources and equipment suppliers and only buy from
reputable sources. Does this rule out Chinese sources? Not necessarily,
but we do need to be diligent in our qualification of new vendors.


Best regards
Raghuram Bathula

From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of Agrawal Sunil
(Mumbai -Stequ)
Sent: Tuesday, January 22, 2008 9:01 AM
To: materials-welding@googlegroups.com
Cc: PED2000@googlegroups.com
Subject: [MW:511] Pressure Vessel failure during Hydrotest in China - Nov
07

A forwarded mail but very important. The message "Be careful when reviewing
& approving materials / equipments from China".
Check the attachment


Best regards,

Sunil S. Agrawal





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