HAIRPIN CONFIGURED TUBES AND METHOD OF MANUFACTURE

摘要

An integrally formed hairpin configured metallic tube, comprising two parallel leg portions (2, 2') of oblong cross-section connected together by an U-shaped bend portion (3) of substantially circular cross-section. A method of manufacturing hairpin tubes includes the steps of providing a tubular member with a substantially circular cross-section, bending said tubular member to an U-shaped hairpin tube with two parallel leg portions, and subsequent radial deformation of the leg portions to an oblong cross-section.