Transport pipe for transporting solid materials with wear indicator

摘要

The tube (1) has a double walled pipe body comprising a metallic inner pipe and an outer pipe, and a wear display (3) provided on an outer jacket surface (2) in the pipe body. A recess is provided in the outer pipe and partially extended into a wall of the inner pipe. A closure stopper is arranged in the recess, and formed as a closure case that is partially is formed in a hollow-form. The closure stopper is formed from a metallic alloy i.e. light metal alloy. The recess is formed as a hole i.e. blind hole. A cavity is formed at a tip of the hole with the attached closure stopper.