PE-RT/AL/PE-RT piping is produced in various sizing schemes for a variety of applications including air conditioning line sets and refrigeration piping. Certain PE-RT/AL/PE-RT pipes are also intended for hydronic applications such as radiant heating and snow & ice melting as well as select gases (e.g., nitrogen, compressed air) which are compatible with the specific piping material. PE-RT/AL/PE-RT piping is a flexible piping material that is typically sold in coils.
PE-RT/AL/PE-RT piping is a coextruded composite pressure pipe with a welded aluminum tube reinforcement between the inner and outer layers. The inner and outer polymer layers are bonded to the aluminum tube by a melt adhesive. PE-RT is a polyethylene (PE) resin in which the molecular architecture has been designed such that a sufficient number of tie chains are incorporated to allow operation at elevated or raised temperatures (RT). Tie chains "tie" together the crystalline structures in the polymer, resulting in improved properties such as elevated temperature strength and performance, chemical resistance, and resistance to slow crack growth.