Re: Re: SOFTWARE FOR PIPE THICKNESS CALC

Elie,

Sorry I forgot to mention about the Code to adopt. What I only mentioned is the general formula to compute minimal thickness based on strength of materials. It is the designer to recommend the thickness based on the ASME code.

Thanks for the comment.

Joshua G. Rizaga
Engineering Manager
VWC, Philippines

• elie altawil <eliealtawil@yahoo.com> wrote:

> RIZAGA:
>
> Your advise is not correct Mr. Rizaga:
>
> It depends on the Code: For example, if your
> facility
> falls under B31.3, then you have to include:
>
> Corrosion Factor and pipe mill tolerance.
>
> If piping is 2" or smaller, even for MAOP of 100 psi
> or less, you should use sch. 80 piping as a
> minimum.
> For higher MAOP you may consider using sch 160 or
> higher.
>
> Cheers,
>
> --- JOSHUA RIZAGA <jgrizaga@yahoo.com> wrote:
>
> > Good idea.
> > Solving pipe thickness don't require complicated
> > software but only needs the following data:
> >
> > 1. What is the design pressure?
> > 2. What is the operating temperature?
> > 3. What is the ID of the pipe you intend to use?
> > 4. What fluid will pass through your pipe
> >
> > After all of this has been gathered, there are so
> > many
> > books with applicable graphs,tables with material
> > specifications.
> >
> > Solve the thickness, t = IDp/2S where: ID=pipe
> > inside
> > diameter, p=design pressure, S=allowable material
> > stress at a certain temperature.
> >
> > It is better to know the temperature specially for
> > steam piping to attain the right material and to
> > interpolate the material stress against
> temperature.
> >
> > "There are no simple solutions...only intelligent
> > choices"
> >
> >
> > Joshua G. Rizaga
> > Engineering Manager
> > VWC, Philippines
> >
> >
> >
> >
> >
> >
> >
> > --- elie altawil <eliealtawil@yahoo.com> wrote:
> >
> > > Ckeck GPSA Data Book (11th edition) for
> guidance:
> > > See Fig. 17.23 and 17.24 for formulas, Fig 17.25
> > for
> > > allowable stresses, Fig. 17.26 and 17.27 for
> > > examples.
> > >
> > > tomcruz55 <tomcruz55@yahoo.com> wrote: I still
> > dont
> > > get why you need a software to figure out the
> > req'd
> > > thickness?
> > >
> > > You dont need the nodes, the piping outlines to
> > calc
> > > the thickness
> > > of the pipe (min. req'd and nominal) and you
> dont
> > > even need to write
> > > a macro. Its a straight forward application of
> 304
> > > in B31.3 -2002.
> > > You can get the number in less than 5 minutes.
> > >
> > >
> > >
> > > --- In PipingDesign@yahoogroups.com, Narendra
> Roy
> > > <narendra_roy@y...> wrote:
> > > > Do you really need to purchase a software for
> > > > Thickness evaluation? I have the demo CD of
> > > AutoPIPE
> > > > which is fuctional upto 20 nodes and you can
> > > quickly
> > > > model in a minute the pipe run in X-Y plane
> and
> > > put
> > > > your design pressure and temp, materials and
> get
> > > the
> > > > qualified schedule of the pipe for the size.
> It
> > is
> > > > that simple. Just work on and then you will
> > forget
> > > the
> > > > $ outflow. And even for the time you put, will
> > > > behardly 5 minute in all. If you do otherwise
> > you
> > > need
> > > > to have the code volume. calculator, computer,
> > and
> > > > your engenuity to do fast evaluation without a
> > > > software help. And try it and you waste your
> min
> > > 30
> > > > minutes straight. you save your precious 20
> odd
> > > > minutes and you are more confident of your
> > result.
> > >
> > > > NK Roy
> > > >
> > > >
> > > > --- tomcruz55 <tomcruz55@y...> wrote:
> > > >
> > > > > actually im using the software purchase from
> > > Coade
> > > > > the likes of CII,
> > > > > CodeCalc and Tanks. For a quickie, i just
> used
> > > > > either the Casio
> > > > > programmable or the excel.
> > > > >
> > > > > But for dimensions or just figuring out the
> > max.
> > > > > vel, i just grab
> > > > > the slide rule from M.W. Kellog.
> > > > >
> > > > > For those lacking the resources, MS Excel is
> > an
> > > > > excellent tool.
> > > > >
> > > > >
> > > > >
> > > > > --- In PipingDesign@yahoogroups.com,
> virgilio
> > > > > balbuena
> > > > > <virgiliobalbuena@y...> wrote:
> > > > > > Friend,
> > > > > >
> > > > > > I am so amazed with this question ,
> by
> > > the
> > > > > way to make it
> > > > > short you may use mathcad software to create
> > > your
> > > > > formula in
> > > > > calculation of wall thickness base on ASME
> > 31.3
> > > > > ,31.4....etc...I
> > > > > have done this already and it is so easy....
> > > > > >
> > > > > > regards,
> > > > > >
> > > > > > friend.....
> > > > > >
> > > > > > tomcruz55 <tomcruz55@y...> wrote:
> > > > > > A lot of engineers/designers in INdia,
> > > Indonesia,
> > > > > Phil and other
> > > > > > places doesnt get paid $95/hour. And as
> ive
> > > said,
> > > > > if money is no
> > > > > > object sure go ahead and purchase the
> > > software.
> > > > > >
> > > > > > And if you work in an organization that
> pays
> > > > > $95/hour then
> > > > > resources
> > > > > > will be available. Meaning, the question
> > > shouldnt
> > > > > have been raised
> > > > > > in the first place.
> > > > > >
> > > > > >
> > > > > >
> > > > > > --- In PipingDesign@yahoogroups.com, elie
> > > altawil
> > > > > <eliealtawil@y...>
> > > > > > wrote:
> > > > > > > My billing time is $95/hour. I sure
> can't
> > > build
> > > > > the spreadsheets
> > > > > > available in http://www.pipingoffice.us/
> > > software
> > > > > with 3 hour time.
> > > > > > >
>

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Send instant messages to your online friends http://uk.messenger.yahoo.com Received on Thu Sep 15 10:49:00 2005