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(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 DN MPa 10 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 450 500 600 ≤1.6 2.5 3 3 3 3 3.5 3.5 4 4 4 2.5 2.5 3 3 3 2 3.5 3.5 4 4 4 4 4 4.5 5 4.5 5 5.5 7 8 9 6 6 8 7 7 9 7 7 8 8 8 8 8 9 9 10 20 12CrMo 15CrMo 4.0 2.5 3 3 3 3 3.5 3.5 4 4 4.5 5 6.4 3 3 3 3.5 3.5 3.5 4 4.5 5 6 10.0 3 3.5 3.5 4 4.5 4.5 5 6 7 8 7 9 10 11 12 13 15 11 12 14 16 17 19 22 8 9 10 13 15 18 20 22 12Cr1MoV 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 4 5 7 7 8 8 8 9 8 9 ≤1.6 2.5 3 3 3 3 3.5 3.5 4 4.5 4 2.5 2.5 3 3 3 3 3.5 3.5 4 4.5 4 4.0 2.5 3 3 3 3 3.5 3.5 4 4.5 5 10 Cr5Mo 6.4 3 3 3 3.5 4 4 4.5 5 5.5 7 10.0 3 3.5 4 4 4.5 5 5.5 7 8 9 4.5 5.5 7 4.5 5.5 7 8 9 10 12 5.5 6 8 9 10 11 12 14 15 18 11 13 14 16 18 20 22 26 6 8 7 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 6 7 9 6 7 ≤1.6 2.5 2.5 2.5 3 3 3 3 3.5 3.5 3.5 3.5 4 2.5 2.5 2.5 2.5 3 3 3 3 3.5 3.5 3.5 3.5 4 4.0 2.5 2.5 2.5 3 3 3 3 3.5 3.5 4 16Mn 15MnV 6.4 2.5 3 3 3 3.5 3.5 3.5 4 4.5 5 10.0 3 3 3.5 3.5 4 4 4.5 5 6 7 16.0 3.5 3.5 4 4.5 5 5 6 7 8 9 4.5 5 6 8 7 9 4.5 5 4.5 5 6 8 7 9 5.5 6 5.5 6 8 8 10 11 12 11 12 13 14 16 18 11 13 15 17 19 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 DN MPa 10 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 450 500 600 3 3 3.5 3.5 3.5 4 3.5 3.5 4 4.5 5 4 4.5 5 7 1Cr18Ni9Ti ≤1.0 2 2 2 2.5 2.5 2.5 2.5 2.5 2.5 3 含Mo不锈钢 1.6 2 2.5 2.5 2.5 2.5 2.5 3 3 3 3 4.5 5 6 6 2.5 2 2.5 2.5 2.5 2.5 2.5 3 3 3 3.5 3.5 4 4.0 2 2.5 2.5 2.5 2.5 2.5 3 3 3.5 4 6.4 2.5 2.5 2.5 3 3 3 3.5 4 4.5 5 4.0T 3 3.5 3.5 4 4 4 4.5 4.5 5 6 7 6 8 7 8 9 10 10 11 13 14 （三）焊接钢管壁厚 mm 材料 PN DN MPa 200 250 300 350 400 450 500 600 700 800 900 1000 1100 1200 1400 1600 0.25 5 0.6 5 5 5 5 6 8 3 3 5 6 6 7 9 3 5 6 6 7 9 3 5 6 6 8 5 6 7 8 5 6 7 9 6 7 8 6 7 8 6 7 9 6 7 9 6 8 10 6 8 11 15 7 8 11 16 7 9 12 7 10 焊接碳钢管 （Q235A20） 1.0 5 1.6 6 2.5 7 10 11 12 13 14 10 11 12 13 15 16 3.5 3.5 3.5 4 4 4 4 5 7 0.25 3 0.6 3 焊接不锈钢管 4.5 4.5 6 8 6 3.5 3.5 3.5 4 4.5 4.5 5 6 8 6 9 7 9 4.5 5 7 9 1.0 3.5 3.5 4 1.6 4 2.5 5 4.5 5 6 7 5.5 6 7 8 10 10 12 13 15