Production of brazeable pipes

B - Operations – Transporting – 21 – D

Patent

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B21D 53/02 (2006.01) B21C 37/06 (2006.01) B21C 37/09 (2006.01) B23K 1/00 (2006.01) B23K 35/02 (2006.01) F28F 9/02 (2006.01) F28F 21/08 (2006.01)

Patent

CA 1319565

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

601107

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