in most large industry applications to prevent stress at the coupling ends you would need to put a coil in the line . This allows the line to flex/ vibrate/ expand/retract at different rates in relation to temp changes and material differences. When is the last time you saw a vehicle with all rubber hoses on the brakes or fuel lines?? The coil will take care of the problem..

Xnavylfr(CHUCK)

BEER,BIKES and BABES since '69Thumbsup