Re: Trunnion on an Elbow

give me a few weeks to prepare the material. ditto to the precommsisioing of the piping system. The equation and graph are sourced from books (some no longer printed), specs prepared by EPC. Format will be etiher in jpg scan or pdf and ms word with some tables in excell.

Im not really hoping anyone to notice my posting much more show interest in the design of trunnion.

• In PipingDesign@yahoogroups.com, Suresh Kumar <edapal@y...> wrote:
  >
  > Hi Friends,
  > I also agree with this suggestion to make the calc available for
  all members.
  > Regards,
  > Suresh
  > Ashok T Dani <ashokdani@t...> wrote:Hi Tom,
  > Everyone are interested in Calc. Better you post the material on
  personal ID
  > of Paul (Moderator) and he will just Up-load the material on
  Group. I think
  > it will be convenient for you and all of also.
  > Regards,
  >
  > -----Original Message-----
  > From: tomcruz55 [SMTP:tomcruz55@y...]
  > Sent: Thursday, March 27, 2003 12:10 AM
  > To: <a href="/group/PipingDesign/post?postID=ulTY-pRXwXsDceipE9T3SSoVCmGwOoTkOGVpa8r2JjNLKZQG1FpM-WQmSs-x1JC8ANcQnBoF2i9uNQKRWSU88Birag">PipingDesign@yahoogroups.com</a>
  > Subject: [PipingDesign] Re: Trunnion on an Elbow
  >
  > 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
  >
  > with it are
  > > confidential and intended only for the use of the
  individual or
  > entity to whom
  > > they are addressed. If you have received this message in
  error,
  > please
  > > immediately notify the sender and delete the mail. The
  views or
  > opinions
  > > presented in this email are those of the author and do not
  > necessarily represent
  > > those of the company. The recipient should check this
  email and
  > any
  > attachments
  > > for the presence of viruses. Foster Wheeler Eastern Pte Ltd
  > accepts
  > no liability
  > > for any damage caused by any virus transmitted by this
  email.'
  > >
  > >
  > >
  > > ____________________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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