大口径管道公称直径壁厚及压力对照表

公称直径英制国内外径国外外径DN （mm ）

NPS （吋）

mm mm 5S

10S 40S 80S 10

20

30

STD 4060

XS 80100

120

140

160

XXS

161/81010.3 1.24 1.73 2.41 1.73 1.73 2.41 2.41281/41513.7 1.65 2.24 3.02 2.24 2.24 3.02 3.023103/81817.1 1.65 2.31 3.20 2.31 2.31 3.20 3.204151/222、2521.3 1.65 2.11 2.77 3.73 2.11 2.41 2.77 2.77 3.73 3.73 4.787.475203/427、3226.7 1.65 2.11 2.87 3.91 2.11 2.41 2.87 2.87 3.91 3.91 5.567.82625134、3833.4 1.65 2.77 3.38 4.55 2.77

2.90

3.38 3.38

4.55 4.55 6.359.09732 1 1/44242.2 1.65 2.77 3.56 4.85 3.56 3.56 4.85 4.85 6.359.70840 1 1/245、4848.3 1.65 2.77 3.68

5.08 2.77 3.18 3.68 3.68 5.08 5.087.1410.15950257、6060.3 1.65 2.77 3.91 5.54 2.77

3.18

3.91 3.91 5.54 5.548.7411.071065 2 1/27673 2.11 3.05 5.167.01 5.49 5.497.017.0111.131

4.021180389

88.9 2.11 3.05 5.497.62 3.05

4.78

5.49 5.497.627.6211.13

15.24

1290 3 1/2101.6 2.11 3.05 5.748.08 5.74 5.748.088.0813*******、114114.3 2.11 3.05 6.028.56 3.05

4.78

6.02 6.028.568.5611.1313.491

7.12141255133141.3 2.77 3.40 6.559.53 6.55 6.559.539.5312.7015.8819.0515*******、16816

8.3 2.77 3.407.1110.97 3.407.117.1110.9710.9714.2718.2621.9516200821921

9.1 2.77 3.768.1812.70 3.76 6.357.048.188.1810.3112.7012.7015.0918.2620.6223.0122.231725010273273 3.40 4.199.2712.70 4.19 6.357.809.279.2712.7012.7015.0918.2621.4425.4028.5825.401830012325323.8 3.96 4.579.53

12.70

4.57 6.358.389.5310.3114.2712.7017.4821.442

5.4028.5833.3225.40

1935014377355.6 3.96 4.78 6.357.929.539.5311.1315.0912.7019.0523.8327.7931.7535.712040016426406.4 4.19 4.78 6.357.929.539.5312.7016.6612.7021.4426.1930.9636.5340.492145018480457 4.19 4.78 6.357.9211.139.5314.2719.0512.7023.8329.3634.9339..6745.242250020530508 4.78 5.54 6.359.5312.709.5315.09

20.6212.7026.1932.5438.1044.4550.012355022559 4.78 5.54 6.359.5312.709.5322.2312.7028.5834.9341.2847.6353.982460024630610 5.54 6.35

6.359.5314.27

9.5317.4824.6112.7030.96

38.89

46.02

52.37

59.54

25650266607.9212.709.5312.7026700287207117.9212.7015.889.5312.702775030762 6.35

7.92

7.9212.7015.889.5312.7028800328208137.9212.7015.889.5317.4812.7029850348647.9212.7015.889.5317.4812.7030900369209147.92

12.70

15.889.5319.0512.7031950389659.5312.7032100040102010169.5312.703310504210679.5312.7034110044112011189.5312.703511504611689.5312.7036120048122012199.5312.7037130052132013219.5310.3111.1311.9112.7014.2715.8830.1817.4819.0531.7520.6222.2323.8325.4026.9728.5838140056142014229.5310.3111.1311.9112.7014.2715.8830.1817.4819.0531.7520.6222.2323.8325.4026.9728.5839150060152015249.5310.3111.1311.9112.7014.2715.8830.1817.4819.0531.7520.6222.2323.8325.4026.9728.584016*************.53

10.31

11.13

11.9112.7014.2715.8830.1817.4819.0531.7520.6222.2323.8325.4026.9728.58411700681720172711.91

12.7014.2715.8830.1817.4819.0531.7520.6222.2323.8325.4026.9728.58421800721820182912.7014.2715.8830.1817.4819.0531.7520.6222.2323.8325.4026.9728.58431900761920193012.70

14.2715.8830.1817.4819.0531.7520.6222.2323.8325.4026.9728.5844

2000

80

20202032

14.27

15.88

30.18

17.48

19.05

31.75

20.62

22.23

23.83

25.40

26.97

28.58

0.10.160.250.40.61 1.62 2.545 6.4 6.810151625404264100

75

150

300

400

600

900

1500

2500

M8M10M12M14M16M18M20M22M24M27M30M33M36M39M42

M45

M48M52M56M64M72M76

U 1/4"

U 3/8"

U 1/2"

U 5/8"

U 3/4"U 7/8"U 1"

U 1-1/8"

U 1-1/4"

U 1-3/8"U 1-1/2"U 1-5/8"U 1-3/4"U 1-7/8"

U 2"

U 2-1/8"

U 2-1/4"

U 2-1/2"

U 3"

管道公称直径一览表（美国ASME 标准）B36.10、B36.19M

不锈钢管道壁厚系列焊接和无缝钢管壁厚系列

注：STD 指标准壁厚管 XS 加厚壁厚管 XXS 特别加厚壁厚管

S指不锈钢系列，不带S 指其他钢种焊接和无缝钢管壁厚系列 数据中系列加上Sch 与没有Sch 的意义相同 例如Sch5S 与5S 意义相同，Sch30与30意义相同

中国公称压力PN（MPa）壁厚t=（DP/(2σt+P)）+2.54，其中D为外径，P为设计压力，σt为不同温度条件下的许用应力，为了保证机械零件或构件安全耐久地工作，在进行设计计算时，必须使它具有一定的强度储备，因此常将实验测得的材料极限应力除以一个大于1的系数n，这样得到的值作为零件安全工作时所许可的应力值，称为许用应力（σ）。

六角头螺栓螺纹规格英制六角头螺栓规格

美国压力级别CL（Psi）（lb）序号