A PROCESS FOR CONTINUOUS WELDING A COMPOSITE PIPE WITH OUTER STAINLESS CLADDING LAYER

摘要

A process for continuous welding a composite pipe with outer stainless cladding layer comprises steps as follows, (1) determining width dimension of a metal strip coil based on the pipe diameter of the composite pipe (S1), (2) unwinding (S2), (3) cold rolling formation in a pipe making machine set (S3), (4) welding to form pipe (S4), (5) cutting after finishing (S5), wherein a composite bimetal coil of stainless steel and carbon steel is used as the metal coil in step (1), and a stainless welding rod is used for welding in step (4). The process is easy to carry out and may be apply to a conventional pipe making machine set for producing the composite pipe.