Pipe Deflection

Date 12-14-2009 21:05

The application is a 6" schedule 40 - 304 S.S. carrier pipe inside of a 10" schedule 10 (aprox .165 wall) carbon containment pipe xtra coated 30 mil, with bore spacers at about every 6.6'. The linear distance is 700' x 2 lines.

My question is what is the deflection of this double wall pipe is it driven by the 10" or the 6" or a combination of both most likely the latter? Any resources to help calculate this will be appreciated.

Thanks

P.I.

By G.S.Crisi (****)

Date 12-14-2009 23:39 Edited 12-15-2009 20:16

A simplified approach would be to calculate each pipe as a uniformely loaded beam simply supported. The beam span is the distance between pipe supports.
The 6 inches pipe weight per foot (or meter) is the pipe weight plus the fluid it contains. The 10 inches pipe weight is the pipe weight plus the 6 inches pipe weight.
Most engineering manuals will show you how to calculate this type of beam (uniformely loaded and simply suported) and its deflection.
Does the idea look too simplified?
Giovanni S. Crisi
Sao Paulo - Brazil

By PipeIt

Date 12-15-2009 15:00

Thanks Sao I will play around with that approach.