精心整理焊接钢管公称口径理论重量外径（mm）壁厚（mm）规格型号（kg/m）毫米英寸DN661/810.002.000.39DN881/413.502.250.62DN10103/817.002.250.82DN15151/221.252.751.25DN20203/426.752.751.63DN2525133.503.252.42DN32325/442.253.253.13DN40403/248.003.503.84DN5050260.003.504.88DN70705/275.503.756.64DN8080388.504.008.34DN1001004114.004.0010.85DN1251255140.004.5015.04精心整理DN1501506165.004.5017.81