一低压流体输送用焊接钢管及热浸镀锌焊接钢管(GB30913092-93)公称口径外径普通钢管加厚钢管(mm)(in)公称尺寸(mm)壁厚(mm)理论重量(kgm)壁厚(mm)理论重量(kgm)61810.02.000.392.500.4681413.52.250.622.750.73103817.02.250.822.750.97151221.32.751.263.251.45203426.