Pipe Nominal Diameter to MM and Inches Chart

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Pipe Nominal Diameter to MM and Inches Chart

Pipe Nominal Diameter to MM and Inches Chart

As per ASME, the word pipe is used, as distinguished from tube, to apply to tubular products of dimensions commonly used for pipeline andPipe Nominal Diameter to MM and Inches Chart piping systems.

Pipes NPS 12 (DN 300) and smaller have outside diameters numerically larger than their corresponding sizes. In contrast, the outside diameters of tubes are numerically identical to the size number for all sizes.

The manufacture of pipe NPS 1⁄8 (DN 6) to NPS 12 (DN 300), inclusive, is based on a standardised outside diameter (OD). The manufacture of pipe NPS 14 (DN 350) and larger proceeds on the basis of an OD corresponding to the nominal size.

Understand the basic

  • ASME B36.10 provide welded and seamless wrought steel pipe dimensions for high or low temperatures and pressures.
  • ASME B36.19 standardisation of welded and seamless wrought stainless steel pipe dimensions for high or low temperatures and pressures.
Dimensions of Welded and Seamless Wrought Steel Pipe (Pipe Nominal Bore to MM and Inches Chart)

 

NPS DN Inches Schedule  Millimeter
OD Wall Thickness OD Wall Thickness
1/8 6 0.405 0.049 10/10S 10.3 1.24
1/8 6 0.405 0.068 STD/40/40S 10.3 1.73
1/8 6 0.405 0.095 XS/80/80S 10.3 2.41
1/4 8 0.54 0.065 10/10S 13.7 1.65
1/4 8 0.54 0.088 STD/40/40S 13.7 2.24
1/4 8 0.54 0.119 XS/80/80S 13.7 3.02
3/8 10 0.675 0.065 10/10S 17.1 1.65
3/8 10 0.675 0.091 STD 40/40S 17.1 2.31
3/8 10 0.675 0.126 XS 80/80S 17.1 3.2
1/2 15 0.84 0.065 5/5S 21.3 1.65
1/2 15 0.84 0.083 10/10S 21.3 2.11
1/2 15 0.84 0.109 STD 40/40S 21.3 2.77
1/2 15 0.84 0.147 XS 80/80S 21.3 3.73
1/2 15 0.84 0.188 160 21.3 4.78
1/2 15 0.84 0.294 XX 21.3 7.47
3/4 20 1.05 0.065 5/5S 26.7 1.65
3/4 20 1.05 0.083 10/10S 26.7 2.11
3/4 20 1.05 0.113 STD/40/40S 26.7 2.87
3/4 20 1.05 0.154 XS/80/80S 26.7 3.91
3/4 20 1.05 0.219 160 26.7 5.56
3/4 20 1.05 0.308 XX 26.7 7.82
1 25 1.315 0.065 5/5S 33.4 1.65
1 25 1.315 0.109 10/10S 33.4 2.77
1 25 1.315 0.133 STD/40/40S 33.4 3.38
1 25 1.315 0.179 XS/80/80S 33.4 4.55
1 25 1.315 0.25 160 33.4 6.35
1 25 1.315 0.358 XX 33.4 9.09
1-1/4 32 1.66 0.065 5/5S 42.2 1.65
1-1/4 32 1.66 0.109 10/10S 42.2 2.77
1-1/4 32 1.66 0.14 STD/40/40S 42.2 3.56
1-1/4 32 1.66 0.191 XS/80/80S 42.2 4.85
1-1/4 32 1.66 0.25 160 42.2 6.35
1-1/4 32 1.66 0.382 XX 42.2 9.7
1-1/2 40 1.9 0.065 5/5S 48.3 1.65
1-1/2 40 1.9 0.109 10/10S 48.3 2.77
1-1/2 40 1.9 0.145 STD/40/40S 48.3 3.68
1-1/2 40 1.9 0.2 XS/80/80S 48.3 5.08
1-1/2 40 1.9 0.281 160 48.3 7.14
1-1/2 40 1.9 0.4 XX 48.3 10.16
2 50 2.375 0.065 5/5S 60.3 1.65
2 50 2.375 0.109 10/10S 60.3 2.77
2 50 2.375 0.154 STD/40/40S 60.3 3.91
2 50 2.375 0.218 XS/80/80S 60.3 5.54
2 50 2.375 0.344 160 60.3 8.74
2 50 2.375 0.436 XX 60.3 11.07
2-1/2 65 2.875 0.083 5/5S 73 2.11
2-1/2 65 2.875 0.12 10/10S 73 3.05
2-1/2 65 2.875 0.203 STD/40/40S 73 5.16
2-1/2 65 2.875 0.276 XS/80/80S 73 7.01
2-1/2 65 2.875 0.375 160 73 9.53
2-1/2 65 2.875 0.552 XX 73 14.02
3 80 3.5 0.083 5/5S 88.9 2.11
3 80 3.5 0.12 10/10S 88.9 3.05
3 80 3.5 0.216 STD/40/40S 88.9 5.49
3 80 3.5 0.3 XS/80/80S 88.9 7.62
3 80 3.5 0.438 160 88.9 11.13
3 80 3.5 0.6 XX 88.9 15.24
3-1/2 90 4 0.083 5/5S 101.6 2.11
3-1/2 90 4 0.12 10/10S 101.6 3.05
3-1/2 90 4 0.226 STD 40/40S 101.6 5.74
3-1/2 90 4 0.318 XS 80/80S 101.6 8.08
3-1/2 90 4 0.636 XX 101.6 16.15
4 100 4.5 0.083 5/5S 114.3 2.11
4 100 4.5 0.12 10/10S 114.3 3.05
4 100 4.5 0.237 STD 40/40S 114.3 6.02
4 100 4.5 0.337 XS 80/80S 114.3 8.56
4 100 4.5 0.438 120 114.3 11.13
4 100 4.5 0.531 160 114.3 13.49
4 100 4.5 0.674 XX 114.3 17.12
5 125 5.563 0.109 5/5S 141.3 2.77
5 125 5.563 0.134 10/10S 141.3 3.4
5 125 5.563 0.258 STD 40/40S 141.3 6.55
5 125 5.563 0.375 XS 80/80S 141.3 9.53
5 125 5.563 0.5 120 141.3 12.7
5 125 5.563 0.625 160 141.3 15.88
5 125 5.563 0.75 XX 141.3 19.05
6 150 6.625 0.109 5/5S 168.3 2.77
6 150 6.625 0.134 10/10S 168.3 3.4
6 150 6.625 0.28 STD 40/40S 168.3 7.11
6 150 6.625 0.432 XS 80/80S 168.3 10.97
6 150 6.625 0.562 120 168.3 14.27
6 150 6.625 0.719 160 168.3 18.26
6 150 6.625 0.864 XX 168.3 21.95
8 200 8.625 0.109 5S 219.1 2.77
8 200 8.625 0.148 10/10S 219.1 3.76
8 200 8.625 0.25 20 219.1 6.35
8 200 8.625 0.277 30 219.1 7.04
8 200 8.625 0.322 STD/40/40S 219.1 8.18
8 200 8.625 0.406 60 219.1 10.31
8 200 8.625 0.5 XS/80/80S 219.1 12.7
8 200 8.625 0.594 100 219.1 15.09
8 200 8.625 0.719 120 219.1 18.26
8 200 8.625 0.812 140 219.1 20.62
8 200 8.625 0.875 XX 219.1 22.23
8 200 8.625 0.906 160 219.1 23.01
10 250 10.75 0.134 5S 273.1 3.4
10 250 10.75 0.165 10S 273.1 4.19
10 250 10.75 0.25 20 273.1 6.35
10 250 10.75 0.307 30 273.1 7.8
10 250 10.75 0.365 STD/40/40S 273.1 9.27
10 250 10.75 0.5 XS/60/80S 273.1 12.7
10 250 10.75 0.594 80 273.1 15.09
10 250 10.75 0.719 100 273.1 18.26
10 250 10.75 0.844 120 273.1 21.44
10 250 10.75 1 140/XX 273.1 25.4
10 250 10.75 1.125 160 273.1 28.58
12 300 12.75 0.156 5S 323.9 3.96
12 300 12.75 0.18 10S 323.9 4.57
12 300 12.75 0.25 20 323.9 6.35
12 300 12.75 0.33 30 323.9 8.38
12 300 12.75 0.375 STD/40S 323.9 9.53
12 300 12.75 0.406 40 323.9 10.31
12 300 12.75 0.5 XS/80S 323.9 12.7
12 300 12.75 0.562 60 323.9 14.27
12 300 12.75 0.688 80 323.9 17.48
12 300 12.75 0.844 100 323.9 21.44
12 300 12.75 1 120/XX 323.9 25.4
12 300 12.75 1.125 140 323.9 28.58
12 300 12.75 1.312 160 323.9 33.32
14 350 14 0.188 10S 355.6 4.78
14 350 14 0.25 10 355.6 6.35
14 350 14 0.312 20 355.6 7.92
14 350 14 0.375 STD/30/40S 355.6 9.53
14 350 14 0.438 40 355.6 11.13
14 350 14 0.5 XS/80S 355.6 12.7
14 350 14 0.594 60 355.6 15.09
14 350 14 0.75 80 355.6 19.05
14 350 14 0.938 100 355.6 23.83
14 350 14 1.094 120 355.6 27.79
14 350 14 1.25 140 355.6 31.75
14 350 14 1.406 160 355.6 35.71
16 400 16 0.188 10S 406.4 4.78
16 400 16 0.25 10 406.4 6.35
16 400 16 0.312 20 406.4 7.92
16 400 16 0.375 STD/30/40S 406.4 9.53
16 400 16 0.5 XS/40/80S 406.4 12.7
16 400 16 0.656 60 406.4 16.66
16 400 16 0.844 80 406.4 21.44
16 400 16 1.031 100 406.4 26.2
16 400 16 1.219 120 406.4 30.96
16 400 16 1.438 140 406.4 36.53
16 400 16 1.594 160 406.4 40.49
18 450 18 0.188 10S 457.2 4.78
18 450 18 0.25 10 457.2 6.35
18 450 18 0.312 20 457.2 7.92
18 450 18 0.375 STD/40S 457.2 9.53
18 450 18 0.438 30 457.2 11.13
18 450 18 0.5 XS/80S 457.2 12.7
18 450 18 0.562 40 457.2 14.27
18 450 18 0.75 60 457.2 19.05
18 450 18 0.938 80 457.2 23.83
18 450 18 1.156 100 457.2 29.36
18 450 18 1.375 120 457.2 34.93
18 450 18 1.562 140 457.2 39.67
18 450 18 1.781 160 457.2 45.24
20 500 20 0.218 10S 508 5.54
20 500 20 0.25 10 508 6.35
20 500 20 0.375 STD/20/40S 508 9.53
20 500 20 0.5 XS/30/80S 508 12.7
20 500 20 0.594 40 508 15.09
20 500 20 0.812 60 508 20.62
20 500 20 1.031 80 508 26.19
20 500 20 1.281 100 508 32.54
20 500 20 1.5 120 508 38.1
20 500 20 1.75 140 508 44.45
20 500 20 1.969 160 508 50.01
24 600 24 0.25 10/10S 609.6 6.35
24 600 24 0.375 STD/20/40S 609.6 9.53
24 600 24 0.5 XS/80S 609.6 12.7
24 600 24 0.562 30 609.6 14.27
24 600 24 0.688 40 609.6 17.48
24 600 24 0.969 60 609.6 24.61
24 600 24 1.219 80 609.6 30.96
24 600 24 1.531 100 609.6 38.89
24 600 24 1.812 120 609.6 46.02
24 600 24 2.062 140 609.6 52.37
24 600 24 2.344 160 609.6 59.54
30 750 30 0.312 10 762 7.92
30 750 30 0.375 STD/40S 762 9.53
30 750 30 0.5 XS/20/80S 762 12.7
30 750 30 0.625 30 762 15.88
36 900 36 0.312 10 914.4 7.92
36 900 36 0.375 STD/40S 914.4 9.53
36 900 36 0.5 XS/80S 914.4 12.7

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