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Dear Engs,
First thanks to this forum that let us get really an excellent experience.
I want to involve you in my problem, I have a pipeline with following parameters:
- 10 " X 0.365 "
- Temp. Difference (165 C) /between installation and operation/
- Pumped material (Asphalt)
- Line aboveground (920m in length)
If this line restrained from two ends, and i want to analyse it, to sure that its flexible or not, its safe or not<<<<< what should I Do ?
I've used the failure theory (Maximum shear stress) (Tresca) with the following equations:
Sc=2 τmax=√{(Sh-SL )^2+ 4τ^2}
SL = -E×α×∆t + υ ×Sh
Sh = Pxd/4t
OK, Now after doing some calculations and compare Sc with S.M.Y.S its result that line will fail because of the thermal expansion.
Conclusion we must add solution which in my case will be expansion loops,,,,
after adding them,, calculate everything related...
I want to check again the flexibility of the line after the adding of loops,,,,
so if I go back to theory (Tresca)
the result which i'll get is same as before adding loops ???
as all factors in equations above doesn't change !!!!
SO IS IT WRONG TO CHECK THE FLEXIBILITY OF PIPELINE BY THEORY (Tresca) ???
Please Help
REGARDS
Eng. Hady
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