Re: Stress Temperature and pressure

From: <Ashish>
Date: Tue Jul 24 2007 - 02:08:00 EDT

If your Process people says the line is going to experience 190 DEg C ....then how can you do the analysis in operating condition only ?

Think....What happen if you design a sysytem which is   not capable to withstand the design parameters.

Regards

Ashish

• Manoj Verma <manoj.varma@rolta.com> wrote:

> thanx shailendra,
>
> i have checked with my process dept. they say 190 c
> is the design temp.
>
> but is it ok that i take operating temp and design
> press. for analysis ?
>
> Regards,
> Manoj
>
>
> Kulkarni, Shailendra wrote:
> >
> > Manoj,
> >
> > first of all check with your process dept. why
> there is such a huge
> > variation in operating and design condition?
> >
> > generally in such a cases ,it depends upon company
> standards but as
> > per thumb rule u just add 10% in your operating
> temp. to get your
> > flexibility temp.
> >
> > but note one thing -- if your process says 190
> will b design temp.
> > at worst condition ,then you dont have any other
> options and you have to
> > change your layout
> > or use bellows if it is within the
> > pressure range
> >
> >
> > with regards
> >
> > shailendra kulkarni
> >
> > Black & Veatch India
> >
> > ________________________________
> >
> > From: PipingDesign@yahoogroups.com
> > <mailto:PipingDesign%40yahoogroups.com>
> > [mailto:PipingDesign@yahoogroups.com
> > <mailto:PipingDesign%40yahoogroups.com>]
> > On Behalf Of Manoj Verma
> > Sent: Monday, July 23, 2007 9:48 AM
> > To: PipingDesign@yahoogroups.com
> <mailto:PipingDesign%40yahoogroups.com>
> > Subject: [PipingDesign] Stress Temperature and
> pressure
> >
> > hi every body,
> >
> > i am having a problem for stress analysis of line
> which has operating
> > max temp of 90 C and Design Max of 190 C, 12 bar
> and 26 bar pressure
> > respectively. If i check the line using operating
> max temp and press
> > then line passes but if i take design condition
> then line fails in
> > operating condition, it means that i have to add
> flexibility to pass the
> >
> > line but there is no space to add loop. can any
> body clear my doubt
> > which temp should be taken for stress "Operating
> or Design ?"
> >
> > Thanx and Regards,
> > Manoj
> >
> > [Non-text portions of this message have been
> removed]
> >
> >
>
>
>
> [Non-text portions of this message have been
> removed]
>
>
      

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