Pre-insulated pipes are used in a variety of applications, such as district heating and cooling, oil and gas pipelines, and water and wastewater transmission. These pipes consist of a core pipe, which is the pipe through which the fluid being transported flows, and a layer of insulation, which is covered by a protective outer layer or cladding. The purpose of the insulation is to maintain the temperature of the fluid being transported, while the outer layer or cladding provides protection for the insulation and helps to maintain the integrity of the pipe system.

Pre-insulated pipes with metal cladding are typically made from carbon steel, stainless steel, or aluminum. The metal cladding is applied over the insulation layer using a process called roll bonding, in which the metal and insulation layers are bonded together under pressure and heat. The metal cladding serves to protect the insulation layer from mechanical damage, moisture, and other environmental factors, and helps to extend the service life of the pipe system.