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Support design in piping system

Support design in piping system

Support design in piping system

(OP)
Dear Experts,

Is any difference in piping support design for a piping system having slug flow. Can any body suggest study material for the same.

Thanks and regards     

RE: Support design in piping system

The only website I've seen with any information on this is http://www.win.tue.nl/fsi/
 

**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/

RE: Support design in piping system

Slug flow can develop enormous forces, usually at an elbow or a reducer. Pipe restraints are needed to control these forces and may have to be much stronger than conventional stops and guides. Check out the structure strength and local stresses in pipe support components and pipe attachments.  

RE: Support design in piping system

Quite frankly, your best best is to design the system to not have slug flow.  Tell your process engineers and controls guys to get back to work.

Edward L. Klein
Pipe Stress Engineer
Houston, Texas

"All the world is a Spring"

All opinions expressed here are my own and not my company's.

RE: Support design in piping system

Could be, but if its a gas/oil well a long way offshore, separation and flowing each phase in separate oil and gas lines can get awfully expensive.  It can be much cheaper to design a 2 phase and handle the slugs onshore.

**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/

RE: Support design in piping system

I agree with you BigInch. A word of caution though, I have seen a pig trap at an onshore receiving station ripped off its mounting bolts by a slug impact. Ironically, the slug catcher was immediately downstream, where of course, it has to be.  

RE: Support design in piping system

Yup.  As gas ahead of a slug is compressible and gas behind is high pressure and can decompress rapidly, very high slug velocities and big impacts are often the result.  Its not to say that 2 phase flow is impossible, just more complicated than single phase, so it requires extra caution in designing for the wide range of flow regimes that you can have and means of maintaining positive control in all situations... and smart pipeline operators.   

**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/

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