RE: [MW:6372] Hydrotesting of pipeline

As per your piping design code, you must follow the minimum examination
criteria specified. Over and above code minimum requirements, piping
designer specifies NDT examination type and extent for different fluid
service types and conditions. Those requirements differ from one fluid
service type to other but all the piping as per ASME B31.3 process piping
code has to be hydrostatically tested whether RT / UT has been carried out
5% or 100%.

If you specify the fluid type which has to be handled by the piping under
discussion and the material of piping, I can better provide you the inputs
as per code and other practical experiences.

Regards,
Ashfaq

On Sat, 7 Aug 2010 14:22:37 -0500, César Alexis Viteri Pérez
<alexis_viteri@hotmail.com> wrote:
> Dear Sumit
>
> Some clients especify what kind of NDT and the percentaje that has to be
> aplied for headers , here in Ecuador many accidents have happened in
> hidrostatic tests therefore a common practice is RT/UT for girth welds
and
> DPT weld-thread o'lets, and no one header can be used more than three
> times, of couse the header has to be tested before the pipeline, in
every
> test
>
> BR
>
> Date: Sat, 7 Aug 2010 15:19:14 +0530
> Subject: Re: [MW:6358] Hydrotesting of pipeline
> From: rajeevarora007@gmail.com
> To: materials-welding@googlegroups.com
>
> for safety point of view and for the confirmation of the weld quality
you
> can adopet the any NDT method according to the requirement like RT
having
> the record and UT no record ( RT and UT can check the quality of
complete
> weld ) and DPT is only for the surface defect.
>
>
> it will be advicable to have the RT and DPT test for the weld of header
> rest depand on the procedure or specification.
>
>
> On 7 August 2010 12:42, sumit jaura <sumit.jaura@gmail.com> wrote:
>
> Dear all,
>
> Can anyone suggest that whether it is must to have radiography of all
> flanges and nipples on test header for hydrotesting?
>
>
> or we can only allow by ut or dpt only.
>
> Sumit ,
>
> P. engineer,
>
> Worleyparsons
>
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>
> Rajeev Arora
>
>
>
>
> "DON'T LET SOMEONE BECOME A PRIORITY IN YOUR LIFE...
> WHEN YOU ARE JUST AN OPTION FOR THEM....."
>
> SO , Always keep in mind that......
>
>
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>
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