吹氧管管体由三层无缝钢管即中心管、中层管及外层管套装而成。中心管头部有一段R425mm半圆形紫铜管(管径ψ110mm)。紫铜管的圆弧部分要求内外管径和管壁厚度不变,内外壁光滑平整,不许有任何压痕、变形或皱痕。因为只要稍有变形或皱痕,在高压氧气过流时摩擦发热产生火花都会引起爆炸,其后果不堪设想。为此,我们经过论证和反复试验,研制出一套紫铜管冷弯 Oxygen pipe body by the three-tier seamless steel pipe that is the center tube, middle tube and outer tube set made. Center tube head has a section of R425mm semi-circular copper tube (diameter ψ110mm). The arc part of the copper pipe requires both the inner and outer pipe diameters and the thickness of the pipe wall to be constant, the inner and outer walls are smooth and flat, and no indentations, deformation or wrinkles are allowed. Because as long as a little deformation or wrinkles, high pressure oxygen over friction heat generated spark will cause an explosion, the consequences could be disastrous. To this end, we demonstrated and trial and error, we developed a set of copper tube cold bend