The 'over-design' is an interesting issue. I am interested in bounding this
flexibility problem from another side. Isn't there some thing as too-much
flexibility?. Example for a 3000 ft pipe one can theoretically put either
one anchor or 3 anchors and keep the pipe stresses lower than the allowable
. Of course the stresses in 3-anchor, with same number of elbows and
offsets, would be higher than the 1-anchor system. Besides costs is there
some consideration that should be a constrained - like maximum thermal
movement between anchors ?. Most of the literature deals with the issue of
minimum flexibility or maximum allowable stress and does not address
'maximum flexibility' allowed. Any opinions ?
Hi Amarendra,
I think, if the stress analysis already performed and the result is safe.
Everything is OK, right?
Be careful when putting the anchor and expansion loop. Consider to minimize
the force acting at anchor or expansion loop.
Beside of that the objective why you put anchor and expansion loop can be
achieved. I mean sometimes although we didn't put any anchor or expansion
loop, the system is still safe so why we need to put them (Over design). For
example, when expansion loop location near bends or slopes, the displacement
is transferred to bends or slopes so the expansion loop doesn't have to
work.
Correct me if I'm wrong.
Regards
Arief
--Original Message-----
From: <a href="/group/PipingDesign/post?postID=b87VLssqHpgzCvafhO9mhjukVf1Drh2HcXmeCyC9KBq6eM5T6OFEoXYQncu4uUVNXG3owHTqwnvnYLpKaWcV-eIA33c">PipingDesign@yahoogroups.com</a> [mailto:<a href="/group/PipingDesign/post?postID=b87VLssqHpgzCvafhO9mhjukVf1Drh2HcXmeCyC9KBq6eM5T6OFEoXYQncu4uUVNXG3owHTqwnvnYLpKaWcV-eIA33c">PipingDesign@yahoogroups.com</a>] On
Behalf Of amarendra kumar
Sent: July 8, 2005 10:29 AM
To: <a href="/group/PipingDesign/post?postID=b87VLssqHpgzCvafhO9mhjukVf1Drh2HcXmeCyC9KBq6eM5T6OFEoXYQncu4uUVNXG3owHTqwnvnYLpKaWcV-eIA33c">PipingDesign@yahoogroups.com</a>
Subject: Re: RE: [PipingDesign] cross country pipe line routing
Hello Arief,
I have already done the stress analysis of the system on CAESAR-II and the
system is safe . But due to change of profile of the land you are never able
to feed the exect system giving the exect elevation changes and direction
changes. I have put expansion loops al 500 m span.
Just I want to know practically what problems may arise if the location of
some of the loops and anchors are near bends and slopes.
Amarendra kumar
On Tue, 05 Jul 2005 Arief Agung wrote :
>
>May be, you can do some stress analysis using finite element software and
>by trial and error putting some expansion loop or and anchor at some
>location to find the best arrangement.
>
>Arief
>
>-----Original Message-----
> From: <a href="/group/PipingDesign/post?postID=b87VLssqHpgzCvafhO9mhjukVf1Drh2HcXmeCyC9KBq6eM5T6OFEoXYQncu4uUVNXG3owHTqwnvnYLpKaWcV-eIA33c">PipingDesign@yahoogroups.com</a> [mailto:<a href="/group/PipingDesign/post?postID=b87VLssqHpgzCvafhO9mhjukVf1Drh2HcXmeCyC9KBq6eM5T6OFEoXYQncu4uUVNXG3owHTqwnvnYLpKaWcV-eIA33c">PipingDesign@yahoogroups.com</a>]
> On Behalf Of kuralenthi
>Sent: July 4, 2005 6:00 PM
>To: <a href="/group/PipingDesign/post?postID=b87VLssqHpgzCvafhO9mhjukVf1Drh2HcXmeCyC9KBq6eM5T6OFEoXYQncu4uUVNXG3owHTqwnvnYLpKaWcV-eIA33c">PipingDesign@yahoogroups.com</a>
>Subject: Re: [PipingDesign] cross country pipe line routing
>
>IS it not a buried pipeline
>
>kural
>--- amarendra kumar <amarkr_2302@rediffmail.com>
>wrote:
>
>
>---------------------------------
> Hello all,
>
>I want to know what problems will arise if for a cross
>country pipe line ( approx 6 km length op. temp -33
>deg c -- size 20 inch )one expansion loop is
>installed just near slope or bend. also what is the
>ideal locaton of anchors with respect to bends other
>than that of expansion loop.
>
>thanks
>
>Amarendra Kumar
>
>
>Regards,
>Amarendra Kumar,
><a href="/group/PipingDesign/post?postID=6dd82NbrkShDrwv4rjWYNDyJvWj_ZTkza1ReNqXeMTxiV2_islwy9gXg7Sqv79LzcWprkrGDfSJIJXlJ-3_XtA">amarkr_2302@rediffmail.com</a>
>
>
>
>[Non-text portions of this message have been removed]
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Regards,
Amarendra Kumar,
<a href="/group/PipingDesign/post?postID=6dd82NbrkShDrwv4rjWYNDyJvWj_ZTkza1ReNqXeMTxiV2_islwy9gXg7Sqv79LzcWprkrGDfSJIJXlJ-3_XtA">amarkr_2302@rediffmail.com</a>
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