Plastic pipe

摘要

Plastic pipe comprises a inner layer (1) and a thinner outer layer (2) that inhibits vapor and gas permeation and is made of a polyurea produced by reacting an isocyanate with a primary or secondary amine. An Independent claim is also included for a thermally insulated transport pipe comprising an inner pipe as above surrounded by an outer pipe, with an annular gap filled with polymer foam between the two pipes.