Method of manufacture of a multiple finned tube

摘要

A metallic finned tube, in particular for heat exchangers, which includes multiple integral fins helically extending on the outside, with the n fin run starts starting at the start of the tube and are evenly distributed around the tube periphery. The finned tube has a number of fin run starts n>/=4 with at least one group having at least two side-by-side oriented fin run starts (A1, A2 or rather A3, A4 . . . ).