Re: Re: SR criteria

The same standard is applicable to Carbon Steel only it is different for Alloy Steel and IBR grade.

n dave

prashant480977 wrote:

> Dear Rakesh,
>
> SR criteria will vary as per the standard used by the professional &
> nature / type of piping. Basically SR will be done as per -
>
> As per 31.3 SR reqd if PWT is equal or greater than 19.1 mm.
> As per 31.4 & 31.8 SR reqd if PWT is equal or greater than 32 mm.
> As per DNV standard SR reqd if PWT is equal or greater than 44 mm.
>
> Regards,
> Prashant.
>
> --- In PipingDesign@yahoogroups.com, Rakesh Patil <rpa@l...> wrote:
> >
> > dear all,
> >
> > I need criteria for doing SR (stress releiving) in piping. Pls
> confirm
> > whether my understanding is correct. If not, pls correct and
> revert.
> >
> > a. In offshore piping, all topside piping designed as per B31.3
> calls NDT
> > for Pipe joint having wall thk 19mm and more.
> >
> > b. For Piggable lines for Water injection / Lift Gas / Well fluid
> which are
> > designed as per B 31.4 and B 31.8, SR is required if wall thk is
> 32mm and
> > more.
> >
> > Pls revert.
> >
> > regards,
> > rakesh
> >
> >
>
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[Non-text portions of this message have been removed] Received on Fri Sep 23 05:51:00 2005