Table of inner and outer diameter sizes, wall thickness, and wall thickness grade standards for seamless steel tubes commonly used in the petrochemical industry

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This post was last edited by MountainMan_qUs52 on 2022-4-11 at 20:33. Common seamless steel pipe series: inner and outer diameters, wall thickness, and wall thickness grades. Pipe diameter grades corresponding to metric DN (mm); outer diameter size (mm); pipe wall thickness (mm); inner diameter size (mm); wall thickness grade.
1/2" – 15.7 SCH40; 13.9 SCH80; 11.7 SCH160
3/4" – 20.9 SCH40; 18.9 SCH80; 15.6 SCH160
1" – 26.5 SCH40; 24.4 SCH80; 20.7 SCH160
1-1/4" – 35.0 SCH40; 32.5 SCH80; 29.5 SCH160
1-1/2" – 40.9 SCH40; 38.1 SCH80; 34.0 SCH160
2" – 54.6 SCH10; 52.5 SCH40; 49.3 SCH80; 42.8 SCH160
2-1/2" – 66.6 SCH10; 62.6 SCH40; 59 SCH80; 53.9 SCH160
3" – 82.5 SCH10; 77.9 SCH40; 73.7 SCH80; 66.6 SCH160
3-1/2" – 95.2 SCH10; 90.2 SCH40; 73.7 SCH80
4" – 107.9 SCH10; 104.7 SCH30; 102.3 SCH40; 97.1 SCH80; 92.1 SCH120; 87.3 SCH160
5" – 128.1 SCH40; 122.3 SCH80; 115.9 SCH120; 109.5 SCH160
6" – 154.1 SCH40; 146.3 SCH80; 139.7 SCH120; 131.7 SCH160
8" – 206.3 SCH20; 202.7 SCH40; 193.7 SCH80; 182.5 SCH100; 177.9 SCH120; 174.7 SCH140; 172.7 SCH160
10" – 260.3 SCH20; 250.9 SCH40; 247.7 SCH60; 241.3 SCH80; 236.5 SCH100; 228.7 SCH120; 222.3 SCH140; 215.8 SCH160
12" – 311.1 SCH20; 303.3 SCH40; 295.3 SCH60; 288.9 SCH80; 273.1 SCH100; 266.7 SCH120; 260.3 SCH140; 260.3 SCH160