HERSTELLUNG VON SCHWEISSBAREN ROHREN.

摘要

A process for producing breazeable pipes particularly for use in heat exchangers, the process comprising preparing a brazing sheet (30) which comprises a core sheet (30a) coated with a brazing substance (30b) at least on one surface, forming a bulged (36) portion of a semi-circular cross-section in the central section of the brazing sheet, providing apertures (13) in the bulged portion for securing tube ends therein, and rolling the brazing sheet into a cylinder with its opposite ends (38) being butt jointed to each other.