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On Aug 9, 12:16 pm, hpi001 <pieper-...@kpnmail.nl> wrote:
> Dear Mr. Raghuram,
>
> This is a very interesting article you send about the use of cupro-
> nickel filler metal in 316 material but I have one question, do you
> have it available with pictures of higher quality as well?
> There are a lot of details lost by bringing documents properties down
> to minimize the documents size. If this is available could you send it
> to my personal e-mail address (only possible when the size is smaller
> than 20 MB)? I performed failure analyses in the past and always
> interested in reports with reference to such.
>
> Thank you in advance.
>
> Herman Pieper
>
> On 9 aug, 08:30, "Bathula Raghuram (Mumbai - PIPING)"
>
>
>
> <R.Bath...@ticb.com> wrote:
> > Welding of austenitic stainless steel with cupro-nickel wire resulted in cracking, which was not detected by radiography, but subsequently leaked during pressure testing
>
> > Newly installed austenitic stainless steel piping joints leaked at girth welds during a precommissioning hydrotest and low-pressure air leak test. The piping was ASTM A312 Grade TP316L seamless pipes and was part of a natural gas liquids
> > (NGL) recovery project. The failed joints were intended for hydrocarbon gas, diglycolamine (DGA) or instrument air service. Some of the failed joints were subjected to radiographic testing in the field and accepted prior to pressure testing as
> > part of the code and company standard requirement. Failure analysis of the welds and the subsequent inspection plan to inspect thousands of suspected welds in the project are discussed.
>
> > BY SANYASI RAO AND ALI Y. AL-KAWAIE
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