Hotel hot springs can use directly buried prefabricated insulation pipe pe-rt ii, right? Where can I buy this kind of pipe? Which region has more pe-rt ii manufacturers?

pe-rt？ Ii prefabricated directly buried insulation pipe is named "high density polyethylene external protection pipe polyurethane foam prefabricated directly buried PE-RT? Type II thermal insulation composite plastic pipe (referred to as PE-RT? II insulated composite plastic pipe) ". pe-rt？ Ii has the characteristics of corrosion resistance, long service life of 50 years, good thermal insulation effect, safe and reliable molecular connection and convenient construction. pe-rt？ Ii tube manufacturers are concentrated in Jiangsu and Zhejiang, which can be found online.