How to determine pipeline failure ?

[hady511]

Use a proprietary software such as Caesar II, Autopipe,Simflex,Algor, pipepak or even ansys. As you do not fully understand pipe stress analysis then I would employ a reputable Company to do the analysis for you. Also asphalt is erosive I beleive so adding bends for loops should be considered from an erosion point of view. You may need to substantially thicken up the bends.

Thanks for your reply, I'll indeed check my calculations on paper by ANSYS and STAAD as other softwares aren't available here in market !!

BUT......
Can't we check the flexibility of this line by calculations without software ????
As the code B31.3 use Tresca theory in determining the failure ???,, also referring to B31.4 and other references books lead me to use above equations to compare the stress with SMYS ??

Any clarifications from your side will be useful for me.

AS for the erosion thanks for this information and i'll take note.

REGARDS

[ECH1]

Have you a simple sketch of the line?
Mark it with expansions and points where the calcs fails for the line.
Maybe you put some arrangements for expansión but they are not enough or the points you choose are not the best.
Rgds.