无缝钢管承压能力和壁厚对照表

（一）无缝碳钢管壁厚

材PN DN 质 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 2.5 2.5 3 3 3 2 3.5 3.5 4 4 4 4 4 4.5 5 4 4.5 5 6 6 8 7 7 7 7 8 8 8 8 8 9 9 10 4.0 2.5 3 3 3 3 3.5 3.5 4 4 4.5 5 5.5 7 20 6.4 3 3 3 3.5 3.5 3.5 4 4.5 5 10.0 3 3.5 3.5 4 4.5 4.5 5 6 7 6 8 7 8 9 10 11 12 13 15 9 11 12 14 16 17 19 22 8 8 9 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 7 7 8 8 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 4.5 5.5 7 5 4.5 5.5 7 8 9 10 12 4.0 2.5 3 3 3 3 3.5 3.5 4 4.5 5 5.5 6 10 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 8 9 10 11 12 14 15 18 9 11 13 14 16 18 20 22 26 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 ≤1.6 2.5 2.5 2.5 3 2.5 2.5 2.5 2.5 3 16Mn 16Mn 4.0 2.5 2.5 2.5 3 6.4 2.5 3 10.0 3 3 3 3 3 3 3 3 3 3.5 3.5 3.5 3.5 4 4.5 5 5.5 6 6 6 6 7 3 3.5 3.5 3.5 3.5 4 4.5 5 5.5 6 7 7 8 9 3 3.5 3.5 4 4.5 5 6 7 8 8 9 10 11 12 6 7 8 9 11 12 13 14 16 18 8 9 11 13 15 17 19 3 3.5 3.5 3.5 4 4.5 5 4 4.5 5 5 6 7 7 8 6 8 7 3 3.5 3.5 4 16.0 3.5 3.5 4 4.5 5 9 11 12 16 19 22 25 28 20.0 3.5 4 4.5 5 5.5 6 9 11 13 15 19 24 26 30 直缝钢管壁厚对照表 PN MPa 0.20 5 0 5 0 5 0 5 0 5 0 5 0 5 0 6 DN 20253035404550607080901001101201401600 6 0 6 0 6 0 6 0 6 0 7 0 7 0 7 材料 焊接碳钢管 （Q235A20） 5 0.6 5 1.0 5 1.6 6 2.5 7 0.25 3 5 5 6 8 3 6 6 7 9 3 6 6 7 6 6 8 6 7 8 6 7 7 8 7 8 7 9 7 9 8 10 8 11 15 8 11 16 9 12 10 9 10 11 12 13 14 9 10 11 12 13 15 16 3 3.5 3.5 3.5 4 4 4 4.5 4.5 5 7 6 8 6 0.6 3 焊接不锈钢管 3 3.5 3.5 3.5 4 4 4.5 5 7 1.0 3.5 3.5 4 4.5 4.5 5 5.5 6 1.6 4 4.5 5 2.5 5 6 7 6 8 6 9 7 7 8 9 10 9 10 12 13 15

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