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the horizontal pressure vessel arrangement around the pipe rack

the horizontal pressure vessel arrangement around the pipe rack

the horizontal pressure vessel arrangement around the pipe rack

(OP)
a typical horizontal pressure vessel has 2 saddles , fixed & sliding . i dont know how to arrange the vessel around the pipe rack , which saddle should be near the pipe rack ?
if the vessel has  an underground pipe joint on middle of it ,what is my consideration ?
 

RE: the horizontal pressure vessel arrangement around the pipe rack

Based on just the specifics of your question, I recommend the following.
The fixed saddle should always be the closest to the pipe rack.
There should always be proper flexibility built into any line going underground from a vessel, exchanger or other type of equipment.  

RE: the horizontal pressure vessel arrangement around the pipe rack

(OP)
yes i recommanded it before to my coleagues ,
but they said it's dependent on the inlet and outlet nozzles
 pressure so beacuse the upper pressure nozzle is inlet nozzle and it should be on the sliding side , and beacuse the inlet is close to pipe rack , the sliding saddle is near the pipe rack

RE: the horizontal pressure vessel arrangement around the pipe rack

That's not correct.

Temperature growth of the HV should be directed in the same direction of thermal expansion of the lines and it should be exactly as Penpiper said, away from the rack.  Why try to push the rack piping in & knock the rack down when you can easily and freely expand the HV and inlet outlet lines out and away from the rack?  The more you expand outwards, the more you have freedom to expand the same amount inward.

 

**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic  (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/

RE: the horizontal pressure vessel arrangement around the pipe rack

Stesses and forces can change by reversing the short and long line from hotter to cooler.  This is because of the different amounts of thermal growth between the hot line and the cooler line and the amount of those growths that go toward the rack and the amount that would be counteracted by the vessel expansion outward.  

With the fixed vessel end near the rack, the net load to the rack is minimum when the longest line is the hottest, as a larger proportion of the greater thermal growth of that hotter line is allowed to freely expand outwards with the vessel.  The shorter cooler line, trapped between the vessel fixed point and an assumed fixed point on the rack, then would develope a smaller compressive force than the hotter line would if it was in that place.  If the cooler line was the longest, less relative thermal growth would be counteracted by the vessel expansion outward.

**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic  (Note: Make that 99.99% for pipeline companies) http://virtualpipeline.spaces.live.com/

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