(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
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 ≤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
Cr5Mo 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
钢管，无缝钢管，合金管 咨询电话：************