(2010年)最新公称压力（MPa)管道壁厚对照表   （一）无缝碳钢管壁厚                                m m 材料 PN vt. 设计；
计划；
构思MPa DN 10 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 450 500 600   20 12CrMo 15CrMo 12Cr1MoV ≤1.6 2.5 3 3 3 3 3.5 3.5 4 4 4 4 4.5 5 6 7 7 8 8 8 9   2.5 2.5 3 3 3 2 3.5 3.5 4 4 4 4 4.5 5 6 7 7 8 8 9 10   4.0 2.5 3 3 3 3 3.5 3.5 4 4 4.5 5 5.5 7 8 9 10 11 12 13 15   6.4 3 3 3 3.5 3.5 3.5 4 4.5 5 6 7 8 9 11 12 14 16 17 19 22   10.0 3 3.5 3.5 4 4.5 4.5 5 6 7 8 9 10 13 15 18 20 22         16.0 4 4.5 5 5 6 6 7 8 9 11 13 15 19 24 26 30 34         20.0 4 4.5 5 6 6 7 8 9 11 13 15 18 22 28 32 36           4.0T 3.5 4 4 4.5 5 5 5.5                             10 Cr5Mo ≤1.6 2.5 3 3 3 3 3.5 3.5 4 4.5 4 4 4.5 5.5 7 7 8 8 8 8 9   2.5 2.5 3 3 3 3 3.5 3.5 4 4.5 4 5 4.5 5.5 7 7 8 9 9 10 12   4.0 2.5 3 3 3 3 3.5 3.5 4 4.5 5 5.5 6 8 9 10 11 12 14 15 18   6.4 3 3 3 3.5 4 4 4.5 5 5.5 7 8 9 11 13 14 16 18 20 22 26   10.0 3 3.5 4 4 4.5 5 5.5 7 8 9 10 12 15 18 22 24 26         16.0 4 4.5 5 5 6 7 8 9 10 12 15 18 22 28 32 36 40         20.0 4 4.5 5 6 7 8 9 11 12 15 18 22 26 34 38             4.0T 3.5 4 4 4.5 5 5 5.5                             16Mn 15MnV ≤1.6 2.5 2.5 2.5 3 3 3 3 3.5 3.5 3.5 3.5 4 4.5 5 5.5 6 6 6 6 7   2.5 2.5 2.5 2.5 3 3 3 3 3.5 3.5 3.5 3.5 4 4.5 5 5.5 6 7 7 8 9   4.0 2.5 2.5 2.5 3 3 3 3 3.5 3.5 4 4.5 5 6 7 8 8 9 10 11 12   6.4 2.5 3 3 3 3.5 3.5 3.5 4 4.5 5 6 7 8 9 11 12 13 14 16 18   10.0 3 3 3.5 3.5 4 4 4.5 5 6 7 8 9 11 13 15 17 19         16.0 3.5 3.5 4 4.5 5 5 6 7 8 9 11 12 16 19 22 25 28         20.0 3.5 4 4.5 5 5.5 6 7 8 9 11 13 15 19 24 26 30             (二)无缝不锈钢管壁厚                           mm 材料 PN MPa DN 10 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 450 500 600 1Cr18Ni9Ti 含Mo不锈钢 ≤1.0 2 2 2 2.5 2.5 2.5 2.5 2.5 2.5 3 3 3.5 3.5 3.5 4 4 4.5       1.6 2 2.5 2.5 2.5 2.5 2.5 3 3 3 3 3 3.5 3.5 4 4.5 5 5       2.5 2 2.5 2.5 2.5 2.5 2.5 3 3 3 3.5 3.5 4 4.5 5 6 6 7       4.0 2 2.5 2.5 2.5 2.5 2.5 3 3 3.5 4 4.5 5 6 7 8 9 10       6.4 2.5 2.5 2.5 3 3 3 3.5 4 4.5 5 6 7 8 10 11 13 14       4.0T 3 3.5 3.5 4 4 4 4.5                           （三）焊接钢管壁厚                            mm 材料 PN MPa DN 200 250 300 350 400 450 500 600 700 800 900 1000 1100 1200 1400 1600 焊接碳钢管 （Q235A20） 0.25 5 5 5 5 5 5 5 6 6 6 6 6 6 7 7 7 0.6 5 5 6 6 6 6 6 7 7 7 7 8 8 8 9 10 1.0 5 5 6 6 6 7 7 8 8 9 9 10 11 11 12   1.6 6 6 7 7 8 8 9 10 11 12 13 14 15 16     2.5 7 8 9 9 10 11 12 13 15 16             焊接不锈钢管 0.25 3 3 3 3 3.5 3.5 3.5 4 4 4 4.5 4.5         0.6 3 3 3.5 3.5 3.5 4 4 4.5 5 5 6 6         1.0 3.5 3.5 4 4.5 4.5 5 5.5 6 7 7 8           1.6 4 4.5 5 6 6 7 7 8 9 10             2.5 5 6 7 8 9 9 10 12 13 15