초록 ▼

A multilayer composite pipe structure is described. The multilayer composite pipe comprises a hollow inner conduit, a first layer of adhesive, a metallic intermediate layer, a second layer of adhesive, as well as, the outer thermoplastic layer, respectively. The hollow inner conduit is made from any

A multilayer composite pipe structure is described. The multilayer composite pipe comprises a hollow inner conduit, a first layer of adhesive, a metallic intermediate layer, a second layer of adhesive, as well as, the outer thermoplastic layer, respectively. The hollow inner conduit is made from any rigid thermoplastic material. The outer thermoplastic layer is made from a rigid, amorphous thermoplastic polymer. This multilayer composite pipe is pressure bearing. In one embodiment, the multilayer composite pipe is solvent cementable; whereas in another embodiment, the multilayer composite pipe is heat fusible. In still yet another embodiment of the invention, the multilayer composite pipe is bendable. Furthermore, the multilayer composite pipe can be used in a fluid conduit system with fittings with an optional insert.

대표청구항 ▼

[ What is claimed is:] [1.]1. A fluid conduit system comprising:(a) multilayer composite pipes corriprising an inner layer of an amorphous, solvent cementable thermoplastic material having a completely closed, tubular outer surface; a metallic intermediate layer and an adhesive layer between the inn

[ What is claimed is:] [1.]1. A fluid conduit system comprising:(a) multilayer composite pipes corriprising an inner layer of an amorphous, solvent cementable thermoplastic material having a completely closed, tubular outer surface; a metallic intermediate layer and an adhesive layer between the inner layer and the metallic intermediate layer; an outer layer of in amorphous, solvent cementable thermoplastic essentially surrounding the metallic intermediate layer, and an adhesive layer between the metallic intermediate layar and the outer layer;(b) a fitting; and(c) optionally, an insert having an open ended hollow cylindrical body with an extending flange which radiates outwardly from the end of the open ended hollow cylindrical body, having an outer diameter less than the inner diameter of the multilayer composite pipe, such that said insert fits inside said composite pipe.