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 6001.62.5 3 3 3 3 3.5 3.5 4 4 4 4 4.5 5 6 7 7 8 8 8 92.52.5 3 3 3 2 3.5 3.5 4 4 4 4 4.5 5 6 7 7 8 8 9 104.02.5 3 3 3 3 3.5 3.5 4 4 4.5 5 5.5 7 8 9 10 11 12 13 156.43 3 3 3.5 3.5 3.5 4
2、4.5 5 6 7 8 9 11 12 14 16 17 19 2210.03 3.5 3.5 4 4.5 4.5 5 6 7 8 9 10 13 15 18 20 2216.04 4.5 5 5 6 6 7 8 9 11 13 15 19 24 26 30 3420.04 4.5 5 6 6 7 8 9 11 13 15 18 22 28 32 362012CrMo15CrMo12Cr1MoV4.0T3.5 4 4 4.5 5 5 5.51.62.5 3 3 3 3 3.5 3.5 4 4.5 4 4 4.5 5.5 7 7 8 8 8 8 92.52.5 3 3 3 3 3.5 3.5 4
3、 4.5 4 5 4.5 5.5 7 7 8 9 9 10 124.02.5 3 3 3 3 3.5 3.5 4 4.5 5 5.5 6 8 9 10 11 12 14 15 186.43 3 3 3.5 4 4 4.5 5 5.5 7 8 9 11 13 14 16 18 20 22 2610.03 3.5 4 4 4.5 5 5.5 7 8 9 10 12 15 18 22 24 2616.04 4.5 5 5 6 7 8 9 10 12 15 18 22 28 32 36 4020.04 4.5 5 6 7 8 9 11 12 15 18 22 26 34 3810Cr5Mo4.0T3.
4、5 4 4 4.5 5 5 5.51.62.5 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 72.52.5 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 94.02.5 2.5 2.5 3 3 3 3 3.5 3.5 4 4.5 5 6 7 8 8 9 10 11 126.42.5 3 3 3 3.5 3.5 3.5 4 4.5 5 6 7 8 9 11 12 13 14 16 1816Mn15MnV10.03 3 3.5 3.5 4 4 4.5 5 6 7 8 9 11 13
5、 15 17 1916.03.5 3.5 4 4.5 5 5 6 7 8 9 11 12 16 19 22 25 2820.03.5 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 6001.02 2 2 2.5 2.5 2.52.5 2.5 2.5 3 3 3.5 3.5 3.5 4 4 4.51.62 2.5 2.5 2.5 2.5 2.53 3 3 3 3 3.5 3.5 4
6、4.5 5 52.52 2.5 2.5 2.5 2.5 2.53 3 3 3.5 3.5 4 4.5 5 6 6 74.02 2.5 2.5 2.5 2.5 2.53 3 3.5 4 4.5 5 6 7 8 9 106.42.5 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4.0T3 3.5 3.5 4 4 4 4.5（三）焊接钢管壁厚 mmDN材料PNMPa 200 250 300 350 400 450 500 600 700 800 900 1000 1100 1200 1400 16000.25 5 5 5 5
7、 5 5 5 6 6 6 6 6 6 7 7 70.65 5 6 6 6 6 6 7 7 7 7 8 8 8 9 101.05 5 6 6 6 7 7 8 8 9 9 10 11 11 121.66 6 7 7 8 8 9 10 11 12 13 14 15 16焊接碳钢管（Q235A20）2.57 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 4.50.63 3 3.5 3.5 3.5 4 4 4.5 5 5 6 61.03.5 3.5 4 4.5 4.5 5 5.5 6 7 7 81.64 4.5 5 6 6 7 7 8 9 10焊接不锈钢管2.55 6 7 8 9 9 10 12 13 15
