PIPE EXTERNALLY COATED WITH SELF-FLUXING ALLOY AND METHOD FOR MANUFACTURING THE SAME

PROBLEM TO BE SOLVED: To provide a method for efficiently manufacturing a pipe externally coated with a self-fluxing alloy where a favorable self-fluxing alloy coat with no breakage is formed on the external surface of a metallic pipe having straight parts and bent parts.SOLUTION: This method for manufacturing a pipe externally coated with a self-fluxing alloy where a self-fluxing alloy coat obtained by flame-spraying self-fluxing alloy onto the external surface of a metallic pipe having straight parts and bent parts and remelting by heating, comprises: a first process of forming the self-fluxing alloy coat on the external surface of a straight metallic pipe to be a straight part using an automatic self-fluxing alloy sprayer or the like; a second process of forming a bent part by cold bending work of the straight metallic pipe formed of the self-fluxing alloy coat in the first process; and a third process of forming a self-fluxing alloy coat on the external surface of the bent part of the metallic pipe bent in the second process by hand working or the like.