Pipe made with PVC-O material and methods for manufacturing a PVC-O pipe

Abstract

A pipe made of PVC-O material, wherein the pipe defines a longitudinal axis. The pipe has a first axially extending circumferential section with a first thickness, and a second axially extending circumferential section with a second thickness. The second thickness is greater than the first thickness. One method for manufacturing a PVC-O pipe comprises forming a tubular preform from PVC material, wherein the tubular preform has a first circumferential section and a second circumferential section; and forcing the tubular preform onto a mandrel to expand the tubular preform and form a PVC-O pipe with biaxially oriented PVC.The first circumferential section of the tubular preform forms a first circumferential section extending axially from the tube with a first thickness, and the second circumferential section of the tubular preform forms a second circumferential section extending axially with a second thickness. The second thickness is greater than the first thickness.