1、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 mDN材料 PNMPa 10 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 450 500 6001.6 2.5 3 3 3 3 3.5 3.5 4 4 4 4 4.5 5 6 7 7 8 8 8 92.5 2.5 3 3 3 2 3.5 3.5 4 4 4 4 4.5 5 6 7 7 8 8 9 104.0 2.5 3 3 3 3 3.5 3.5 4 4 4.5 5 5.5 7 8 9 10 11 12 13 156.4 3 3 3 3.5 3.5
2、 3.5 4 4.5 5 6 7 8 9 11 12 14 16 17 19 2210.0 3 3.5 3.5 4 4.5 4.5 5 6 7 8 9 10 13 15 18 20 2216.0 4 4.5 5 5 6 6 7 8 9 11 13 15 19 24 26 30 3420.0 4 4.5 5 6 6 7 8 9 11 13 15 18 22 28 32 362012CrMo15CrMo12Cr1MoV4.0T 3.5 4 4 4.5 5 5 5.51.6 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 92.5 2.5 3 3
3、3 3 3.5 3.5 4 4.5 4 5 4.5 5.5 7 7 8 9 9 10 124.0 2.5 3 3 3 3 3.5 3.5 4 4.5 5 5.5 6 8 9 10 11 12 14 15 186.4 3 3 3 3.5 4 4 4.5 5 5.5 7 8 9 11 13 14 16 18 20 22 2610.0 3 3.5 4 4 4.5 5 5.5 7 8 9 10 12 15 18 22 24 2616.0 4 4.5 5 5 6 7 8 9 10 12 15 18 22 28 32 36 4020.0 4 4.5 5 6 7 8 9 11 12 15 18 22 26
4、34 3810Cr5Mo4.0T 3.5 4 4 4.5 5 5 5.51.6 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 72.5 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 94.0 2.5 2.5 2.5 3 3 3 3 3.5 3.5 4 4.5 5 6 7 8 8 9 10 11 126.4 2.5 3 3 3 3.5 3.5 3.5 4 4.5 5 6 7 8 9 11 12 13 14 16 1810.0 3 3 3.5 3.5 4 4 4.5
5、5 6 7 8 9 11 13 15 17 1916.0 3.5 3.5 4 4.5 5 5 6 7 8 9 11 12 16 19 22 25 2816Mn15MnV20.0 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 mmDN材料 PNMPa 10 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 450 500 6001.0 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 4.51.6 2 2.5 2.5
6、2.5 2.5 2.5 3 3 3 3 3 3.5 3.5 4 4.5 5 52.5 2 2.5 2.5 2.5 2.5 2.5 3 3 3 3.5 3.5 4 4.5 5 6 6 74.0 2 2.5 2.5 2.5 2.5 2.5 3 3 3.5 4 4.5 5 6 7 8 9 106.4 2.5 2.5 2.5 3 3 3 3.5 4 4.5 5 6 7 8 10 11 13 141Cr18Ni9Ti含 Mo 不锈钢4.0T 3 3.5 3.5 4 4 4 4.5（三）焊接钢管壁厚 mmDN材料 PNMPa 200 250 300 350 400 450 500 600 700 800
7、900 1000 1100 1200 1400 16000.25 5 5 5 5 5 5 5 6 6 6 6 6 6 7 7 70.6 5 5 6 6 6 6 6 7 7 7 7 8 8 8 9 101.0 5 5 6 6 6 7 7 8 8 9 9 10 11 11 121.6 6 6 7 7 8 8 9 10 11 12 13 14 15 16焊接碳钢管（Q235A20 ）2.5 7 8 9 9 10 11 12 13 15 160.25 3 3 3 3 3.5 3.5 3.5 4 4 4 4.5 4.50.6 3 3 3.5 3.5 3.5 4 4 4.5 5 5 6 61.0 3.5 3.5 4 4.5 4.5 5 5.5 6 7 7 81.6 4 4.5 5 6 6 7 7 8 9 10焊接不锈钢管2.5 5 6 7 8 9 9 10 12 13 15
