PIPE WITH RIB, AND METHOD FOR MANUFACTURING PIPE WITH RIB

摘要

PROBLEM TO BE SOLVED: To provide a pipe with rib which has ribs inside itself and is non-linearly shaped.SOLUTION: A pipe with rib M3 comprises: a pipe portion M31; and a rib portion M32 formed inside the pipe portion M31. The rib portion M32 includes a plurality of bent portions 21 to 25 in accordance with bending of the pipe portion M31. The pipe with rib is not well manufactured by extrusion molding, press molding, welding, cutting, metal mold casting, and other conventional methods.