George's question refers to how long it will take a PVC pipe to adjust to the ambient air temperature when coming out of another environment.
I doubt you could drive very far with it in a pipe rack on the roof of the truck before it was brought down to air temperature. The problem would arise when it was stored on site and inside a heated building.
I can’t seem to find any official data on the subject, but based on how fast something like Schedule 40 seems to cool off on a cold winter day after I have heated it in a blanket to bend it, I can’t imagine it would take too long for PVC stored indoors at a warmer temp to acclimate to a colder outdoor ambient.
