How Are Double-Wall Bellows Made? Double-wall corrugated pipe or bellows have been of immense importance, especially in the conveyance of water and other liquid materials from one point to another. Their high heat resistance, lightweight and durability have made double wall bellows to be one of the favourite pipes used by many companies in the transport of liquid materials. Well, the manufacturing process of double-wall bellows goes through various processes such as the double-wall corrugated pipe extrusion , and most of these processes like you would rightly guess are carried out using specially designed double-wall corrugated pipe machines . Without much ado, let's take a quick look at some of the process and stages involved in the manufacture of double-wall bellows. 1. Bellows Design In this stage, a piece of a metal bellows together with bellows expansion joints are fixed to a piping system which helps it to thermal growth of the pipe. D...