FLAT PERFORATED PIPE AND HEAT EXCHANGER

摘要

A flat perforated pipe, comprising a flat outer pipe and a plurality of partition walls partitioning the inside of the outer pipe into a plurality of flow passages. The partition walls of the flat perforated pipe are formed in a cross sectional shape with a thickness of (ti) in a chevron form comprising two of a side with a length of (a), and disposed so that face-to-face distances between the partition walls on the inner surface of the outer pipe are (Li). The thickness (to) of the outer pipe meets the following requirement. By properly selecting a pressure to expand the flat perforated pipe, the outer surface of the pipe can be prevented from being deformed in a waveform shape or an irregular shape.