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Pipe Wall Thickness
Nominal Size | OD | Nominal Wall Thickness For Welded & Seamless Wrought Steel Pipe To ASME B36.10 (In Millimeters) | |||||||||||||||||
Nominal Wall Thickness For Welded & Seamless Wrought Stainless Steel Pipe To ASME B36.19 (In Millimeters) | |||||||||||||||||||
DN | NPS | mm | Schedule | ||||||||||||||||
5S | 10S | 10 | 20 | 30 | 40S | STD | 40 | 60 | 80S | XS | 80 | 100 | 120 | 140 | 160 | XXS | |||
6 | 1/8 | 10.3 | - | 1.24 | 1.24 | - | 1.45 | 1.73 | 1.73 | 1.73 | - | 2.41 | 2.41 | 2.41 | - | - | - | - | - |
8 | 1/4 | 13.7 | - | 1.65 | 1.65 | - | 1.85 | 2.24 | 2.24 | 2.24 | - | 3.02 | 3.02 | 3.02 | - | - | - | - | - |
10 | 3/8 | 17.1 | - | 1.65 | 1.65 | - | 1.85 | 2.31 | 2.31 | 2.31 | - | 3.20 | 3.20 | 3.20 | - | - | - | - | - |
15 | 1/2 | 21.3 | 1.65 | 2.11 | 2.11 | - | 2.41 | 2.77 | 2.77 | 2.77 | - | 3.73 | 3.73 | 3.73 | - | - | - | 4.78 | 7.47 |
20 | 3/4 | 26.7 | 1.65 | 2.11 | 2.11 | - | 2.41 | 2.87 | 2.87 | 2.87 | - | 3.91 | 3.91 | 3.91 | - | - | - | 5.56 | 7.82 |
25 | 1 | 33.4 | 1.65 | 2.77 | 2.77 | - | 2.90 | 3.38 | 3.38 | 3.38 | - | 4.55 | 4.55 | 4.55 | - | - | - | 6.35 | 9.09 |
32 | 11/4 | 42.2 | 1.65 | 2.77 | 2.77 | - | 2.97 | 3.56 | 3.56 | 3.56 | - | 4.85 | 4.85 | 4.85 | - | - | - | 6.35 | 9.70 |
40 | 11/2 | 48.3 | 1.65 | 2.77 | 2.77 | - | 3.18 | 3.68 | 3.68 | 3.68 | - | 5.08 | 5.08 | 5.08 | - | - | - | 7.14 | 10.15 |
50 | 2 | 60.3 | 1.65 | 2.77 | 2.77 | - | 3.18 | 3.91 | 3.91 | 3.91 | - | 5.54 | 5.54 | 5.54 | - | - | - | 8.74 | 11.07 |
65 | 21/2 | 73.0 | 2.11 | 3.05 | 3.05 | - | 4.78 | 5.16 | 5.16 | 5.16 | - | 7.01 | 7.01 | 7.01 | - | - | - | 9.53 | 14.02 |
80 | 3 | 88.9 | 2.11 | 3.05 | 3.05 | - | 4.78 | 5.49 | 5.49 | 5.49 | - | 7.62 | 7.62 | 7.62 | - | - | - | 11.13 | 15.24 |
90 | 31/2 | 101.6 | 2.11 | 3.05 | 3.05 | - | 4.78 | 5.74 | 5.74 | 5.74 | - | 8.08 | 8.08 | 8.08 | - | - | - | - | - |
100 | 4 | 114.3 | 2.11 | 3.05 | 3.05 | - | 4.78 | 6.02 | 6.02 | 6.02 | - | 8.56 | 8.56 | 8.56 | - | 11.13 | - | 13.49 | 17.12 |
125 | 5 | 141.3 | 2.77 | 3.40 | 3.40 | - | - | 6.55 | 6.55 | 6.55 | - | 9.53 | 9.53 | 9.53 | - | 12.70 | - | 15.88 | 19.05 |
150 | 6 | 168.3 | 2.77 | 3.40 | 3.40 | - | - | 7.11 | 7.11 | 7.11 | - | 10.97 | 10.97 | 10.97 | - | 14.27 | - | 18.26 | 21.95 |
200 | 8 | 219.1 | 2.77 | 3.76 | 3.76 | 6.35 | 7.04 | 8.18 | 8.18 | 8.18 | 10.31 | 12.70 | 12.70 | 12.70 | 15.09 | 18.26 | 20.62 | 23.01 | 22.23 |
250 | 10 | 273.1 | 3.40 | 4.19 | 4.19 | 6.35 | 7.80 | 9.27 | 9.27 | 9.27 | 12.70 | 12.70 | 12.70 | 15.09 | 18.26 | 21.44 | 25.40 | 28.58 | 25.40 |
300 | 12 | 323.9 | 3.96 | 4.57 | 4.57 | 6.35 | 8.38 | 9.53 | 9.53 | 10.31 | 14.27 | 12.70 | 12.70 | 17.48 | 21.44 | 25.40 | 28.58 | 33.32 | 25.40 |
350 | 14 | 355.6 | 3.96 | 4.78 | 6.35 | 7.92 | 9.53 | 9.53 | 9.53 | 11.13 | 15.09 | 12.70 | 12.70 | 19.05 | 23.83 | 27.79 | 31.75 | 35.71 | - |
400 | 16 | 406.4 | 4.19 | 4.78 | 6.35 | 7.92 | 9.53 | 9.53 | 9.53 | 12.70 | 16.66 | 12.70 | 12.70 | 21.44 | 26.19 | 30.96 | 36.53 | 30.49 | - |
450 | 18 | 457 | 4.19 | 4.78 | 6.35 | 7.92 | 11.13 | 9.53 | 9.53 | 14.27 | 19.05 | 12.70 | 12.70 | 23.83 | 29.36 | 34.93 | 39.67 | 45.24 | - |
500 | 20 | 508 | 4.78 | 5.54 | 6.35 | 9.53 | 12.70 | 9.53 | 9.53 | 15.09 | 20.62 | 12.70 | 12.70 | 26.19 | 32.54 | 38.10 | 44.45 | 50.01 | - |
550 | 22 | 559 | 4.78 | 5.54 | 6.35 | 9.53 | 12.70 | - | 9.53 | - | 22.23 | - | 12.70 | 28.58 | 34.93 | 41.28 | 47.63 | 53.98 | - |
600 | 24 | 610 | 5.54 | 6.35 | 6.35 | 9.53 | 14.27 | 9.53 | 9.53 | 17.48 | 24.61 | 12.70 | 12.70 | 30.96 | 38.89 | 46.02 | 52.37 | 59.54 | - |
650 | 26 | 660 | - | - | 7.92 | 12.70 | - | - | 9.53 | - | - | - | 12.70 | - | - | - | - | - | - |
700 | 28 | 711 | - | - | 7.92 | 12.70 | 15.88 | - | 9.53 | - | - | - | 12.70 | - | - | - | - | - | - |
750 | 30 | 762 | 6.35 | 7.92 | 7.92 | 12.70 | 15.88 | - | 9.53 | - | - | - | 12.70 | - | - | - | - | - | - |
800 | 32 | 813 | - | - | 7.92 | 12.70 | 15.88 | - | 9.53 | 17.48 | - | - | 12.70 | - | - | - | - | - | - |
850 | 34 | 864 | - | - | 7.92 | 12.70 | 15.88 | - | 9.53 | 17.48 | - | - | 12.70 | - | - | - | - | - | - |
900 | 36 | 914 | - | - | 7.92 | 12.70 | 15.88 | - | 9.53 | 19.05 | - | - | 12.70 | - | - | - | - | - | - |
FAQ
What is the significance of pipe wall thickness?
Pipe wall thickness is the measurement of a pipe’s outer diameter minus its inner diameter, divided by two. It is usually expressed in inches or millimetres, and is an important characteristic of a pipe that affects its performance, durability, and structural integrity.
Pipe wall thickness relates to the ability of a pipe to withstand pressure from liquids or gases flowing through it. A thicker wall provides more resistance against pressure, which helps the pipes hold up against high-pressure applications and transport heavy loads. On the other hand, thinner walls are less rigid and provide less resistance against pressure, making them suitable for low-pressure applications.
The minimum allowable wall thickness is set by various national and international standards such as ASTM A999 and ASTM A999M-12. These standards specify the minimum values for different types of materials used in pipe construction, based on factors like material grade and operating conditions. Manufacturers must adhere to these standards when producing pipes to ensure that they meet the specified performance requirements.