The interface bonding mechanism of bimetallic clad pipes was reviewed

and main preparation processes of bimetallic clad pipes at home and abroad were described systematically.According to the difference in the physical state of the substrate and cladding metal at the initial stage

the existing preparation processes are divided into four categories:solid-solid bonding method

solid-liquid bonding method

liquid-liquid bonding method and other bonding method.The forming principles and main characteristics of various preparation processes were analyzed comparatively.Finally

the prospects for the major issues that would be faced in the industrialization of bimetallic clad pipes were forecasted combined with the development status and future industrial application requirements.