Thanks, I can take solace in that. I would definitely like to go through the
calcs.
If its an attachment, please send it to my personal email ID.
Shreedhar.
> I have to disagree with comments made by Zope and Sachin. Trunnion is
> pretty much an industry accepted pipe support. As pointed out, even
> the guys at Kellogs ( avery long time ago) have done quite a detailed
> study on this very subject and recommend its use. The last book that
> ive read published by CASTI even has a an equation that deals
> specifically with its proper design. There are over a thousand of
> this type of pipe support installed in power plant, refinery and
> petrochem that to date is still around.
>
> And forget about the effect of the SIF, it rarely affect the result
> of your flexibility analysis. Instead focus on the details - welding,
> inspection and fitup if your designing one. If anyone is interested,
> i could post the equation for its design.
>
>
>
> --- In PipingDesign@yahoogroups.com, "Tushar, Zope"
> <zope_tushar@f...> wrote:
> > Hello Friends,
> >
> > Use of trunion on elbow is generally accepted practice. Some
> companies do not allow at all and some companies do allow on
> conditional basis.
> >
> > You can use it for temp. below 150 deg C (No problem at all.)
> > But it's not good to use it above 150 deg C. The reason is simple
> that we can take advantage of flexibility associated with the elbow
> in stress analysis.
> > Also I would suggest to avoid it above 60 deg C for Stainless Steel
> and Alloy Steel lines.
> >
> > Better go for a support at the pipe (horizontal or vertical as
> well).
> >
> > Thanks and regards.
> >
> > Tushar Zope
> > Piping Engineer
> > Foster Wheeler Eastern Pte. Ltd, Singapore
> > Ph: 6890 0837 Fax: 6223 2989
> >
> > Disclaimer
> > 'The information contained in this email and the files transmitted
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> >
> >
> >
> > ____________________Reply Separator____________________
> > Subject: Re: [PipingDesign] Trunnion on an Elbow
> > Author: Sachin_Bapat@r...
> > Date: 9/7/02 8:46 AM
> >
> >
> >
> >
> > If you go through piping design books you will find that
> > trunnion on elbow
> > reduces the flexiblity of trunnion & also it modifies the
> value
> > of sif &
> > flexibility factor . piping design book (M W kellogg)
> chapter 4
> > -local
> > components expilicitly derives relation for the same, thats
> > why most of
> > design companies dont prefer trunnion on elbows & use of pads
> > for trunnion
> > on elbow is highly discarded as all these reduce flexibility
> of
> > trunnion ,
> > which may be of concern in rigid layouts
> > hope this answers your query.
> > regards
> > sachin
> >
> >
> >
> >
> >
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> > Texas Flange - a good source for information on industrial
> > flanges, all they ask is for referrals for designs they help
> > with.
> > 877-610-8924.
> > www.texasflange.com
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Received on Thu Mar 27 01:53:00 2003
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