RE: Re:RE: (PipingDesign) Information About flexia ble connectors

let us say that the piping has been succesfully modeled using caesar II. You now have a new piping that complies with B31. Modified piping is now fab and connected to shell flanged. Tanks still continue to experienced settlement. Settlement now becomes excessive. Stresses on the shell opening becomes excessive without noticeable damage to the pipe. Shell nozzle now show signs of leaks. Few weeks later, Bottom plate finally failed and you now have an uncontrolled spills.

         We normally played such scenarios before tackling the job. i good reading on this subject is API 579 fitness-for-service evaluation What im saying is. Maybe if the risk is acceptable, you may not have to do anything at all (except maybe monitor its condition).
> ----------
> From: virgilio balbuena[SMTP:virgiliobalbuena@yahoo.com]
> Reply To: <a href="/group/PipingDesign/post?postID=yiKZ7b0dnguMlIltGkesF8gJM3oDAVt-dkR0g-iQ6JkBqoULP3VfbUZiK-uSGj_Cfz-IOlyM-t9pR9ftSfdELu_CdQ">PipingDesign@yahoogroups.com</a>
> Sent: 31 October, 2001 1:02 PM
> To: <a href="/group/PipingDesign/post?postID=yiKZ7b0dnguMlIltGkesF8gJM3oDAVt-dkR0g-iQ6JkBqoULP3VfbUZiK-uSGj_Cfz-IOlyM-t9pR9ftSfdELu_CdQ">PipingDesign@yahoogroups.com</a>
> Subject: Re: [PipingDesign] Re:RE: (PipingDesign) Information About
> flexiable connectors
>
> dear friend,
> a program which is call ceasar stress analysis
> by coade is good for analysis, well you will know it
> when your stress result exceed the allowable stress at
> certain temperature.and depends to what code you are
> using.
>
> hope it ans your quetion.
>
> regards'
>
> gil
>
> --- "Tushar, Zope " <zope_tushar@fwc.com> wrote:
> > Derek,
> >
> > I agree with you. But how will you come to know,
> > when the pipe is
> > overstressed?
> > During heavy rains, the rate of settlement may be
> > more.
> >
> > Regards.
> > Tushar
> >
> > ____________________Reply
> > Separator____________________
> > Subject: RE: (PipingDesign) Information About
> > flexiable connectors
> > Author: "Dereb derebi" <SMTP:dereb1@yahoo.com>
> > Date: 10/31/01 3:34 AM
> >
> > Satish, I agree with Ralph, but would add, depending
> > on the configuration of the pipework .... I am
> > assumming the pipework is above grade. A vertical
> > flanged sacrificial spool piece could be
> > incorporated
> > into the piping system. When/if the pipework is over
> > stressed due to the settlement a new length of
> > flanged
> > spool piece can be inserted to account for the
> > settlement.
> > regards.
> > Derek Littleford
> > --- "SARE, RALPH H." <SARERH@YANPET.SABIC.com>
> > wrote:
> > > Satish
> > > The problem is not the piping but rather the AST.
> > > The settlement of the tank
> > > is more serious than the routing of the piping.
> > Fix
> > > the settlement (using
> > > API 653 Tank Inspection Code), then maybe u dont
> > > have to modify the
> > > piping..Currenlty we're doing bottom plate
> > > replacement, shell repair and
> > > correction of settlement in about 4 process tanks
> > -
> > > the whole works such
> > > NDE, geotechnical survey, CUI, CP upgrade,
> > > fitness-for-purpose assessment,
> > > etc.
> > >
> > > My recommendation is check first the mech'l
> > > entigrity (suitability for
> > > service) of the AST then focus on the piping.
> > >
> > > > ----------
> > > > From: Satish
> > N[SMTP:n.satish@pg.siemens.co.in]
> > > > Iam doing pipe routing around a water
> > storage
> > > tank area, in which we
> > > > have a settlement of tanks as 150mm,so in order
> > to
> > > over come
> > > > that settlement i may have to do some flexiable
> > > routing of pipe,so please
> > > > provide some information about the flexiable
> > > connenctions which
> > > > have to be used for this purpose.this is a cold
> > > water service lines.
> > > >
> > > > regards,
> > > > Satish.N
> > > >
> > > >
> > >
> >
> >
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Received on Wed Oct 31 06:36:00 2001