b= insulation layer
polyurethane foam system
c= carrier pip
medium pipe – thermal insulation foam – outer jacket.
The characteristic of Polyurethane insulation foam (PUR) fits perfectly into the concept of pre-insulated pipes:
PUR has a very high adhesive power to bond surfaces together.
A bonded pipe system is created. The system performance is superior to conventionally insulated pipes, because the carrier pipe encased by the insulation foam in a metal jacket acts as one strong unit better able to resist external forces. So sliding supports can be mounted on the outside jacket which is not possible if traditional insulation is specified