Let me make a brief check.
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.
Dear ECHI
The sketch is very simple !!!,, its just line with two existing anchors (Pump house from side, and a valve from the other side)

I think you miss my point,, and want to re ask my question again !!

Suppose you have line with asphalt running into it, the route of line as above,,
other parameters I've mentioned them before

HOW YOU WILL DECIDE THAT THIS LINE WILL FAIL OR NOT AS THERE WILL BE 165 C BETWEEN INSTALLATION AND OPERATION ???
then we will go to the next step (SOLUTIONS)

REGARDS