The growing necessity for the careful of the natural resources and cost reductions in piping engineering of the oil and gas industry makes it inevitable for the steel and pipe industry to seek and develop new materials and system solutions.

One of the solutions to meet this requirement is the mechanically bonded pipe, where a pipe in corrosion resistant steels or nickel alloys is telescopically aligned inside a pipe, mainly in seamless construction, made of unalloyed steel.

The production process and the essential mechanical and physical properties of such bi-metal pipes are being compared with full thickness solid pipes. Questions about the suitability for circumferential welding and further processing are being discussed. Economic considerations on the saving potential regarding the use of mechanically bonded pipes complete the report.