MANUFACTURE OF COMPOSITE PIPE

摘要

PURPOSE:To prevent the tensile cracking of a rotating mother pipe when a thermit reaction is caused in the pipe to form produced layers in the pipe, by previously forming a layer of a heat resistant material on the inside of the pipe. CONSTITUTION:A layer 5 of a heat resistant material is formed on the inside of a metallic mother pipe 1, and a thermit agent 2 consisting of a metallic oxide and a metallic reducing agent is put in the pipe 1 to form a layer of the thermit agent 2 on the layer 5. The thermit agent 2 is then ignited in the field of centrifugal force to cause a thermit reaction. A metallic layer and a ceramic layer produced by the thermit reaction are formed on the inside of the mother pipe 1.