钢管壁厚换算表 |无缝钢管壁厚换算表 规格： 8-1240× 1-200mm 公称通径 Norminal Pipe Size DN 外径 Outside Diameter 公 称 壁 厚 T Norminal Wall Thickness A系列 Series A B系列 Series B sch5ssch10ssch20s LGsch20sch30STDsch40sch60 xs sch80 sch100 sch120 sch140 sch160 15 21.3 18 1.6 2.1 2.6 --- --- --- --- 2.9 --- --- 3.6 --- --- --- 4.5 20 26.9 25 1.6 2.1 2.6 --- --- --- --- 2.9 --- --- 4 --- --- --- 5.6 25 33.7 32 1.6 2.8 3.2