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What is a Pipe Schedule?
A pipe schedule (SCH) is a measure of a steel pipe’s nominal wall thickness.
In the past, metal fabricators used three pipe dimensions — standard, extra strong, and double extra strong. Just having these three undetermined dimensions wasn’t helpful, though. So today, steel pipes come in 14 different schedules.
The most commonly used one is schedule 40.
Schedule 40 Carbon Steel Pipe is one of the medium schedule pipes. There are different schedules in all pipes. The schedule indicates the dimensions and the pressure capacities of the pipes. Hunan Standard Steel Co., Ltd is a leading supplier and manufacturer of the Sch 40 Carbon Pipe products. There are various grades of carbon with various chemical compositions. But the pressure containment capacities are measured and classified. The Carbon Steel Pipe Schedule 40 is a medium range pressure capacity pipe with diameters ranging up to 24 inches and the wall thicknesses ranging up to 46mm.
The diameter to wall thickness ration in addition to the strength of the material decides if it is a Pipe Sch 40 or some other schedule. The schedule is determined in relation to the outer diameter, wall thickness and the pressure capacity of the material. The Schedule 40 Carbon Steel Pipe Weight varies depending on the material it is made. The more carbon is added onto the steel, the less the weight of the pipe is. But the wall thickness and the diameter also play a role. Since schedule 40 is a medium pressure class, the pipes are of medium size wall Schedule 40 Pipe Thickness and the weight is also in the medium range. Please contact us for more information.
| Nominal size [inches] | Outside diameter [inches] | Outside diameter [mm] | Wall thickness [inches] | Wall thickness [mm] | Weight [lb/ft] | Weight [kg/m] |
|---|---|---|---|---|---|---|
| 1/8 | 0.405 | 10.3 | 0.068 | 1.73 | 0.24 | 0.37 |
| 1/4 | 0.540 | 13.7 | 0.088 | 2.24 | 0.42 | 0.84 |
| 1/2 | 0.840 | 21.3 | 0.109 | 2.77 | 0.85 | 1.27 |
| 3/4 | 1.050 | 26.7 | 0.113 | 2.87 | 1.13 | 1.69 |
| 1 | 1.315 | 33.4 | 0.133 | 3.38 | 1.68 | 2.50 |
| 1 1/4 | 1.660 | 42.2 | 0.140 | 3.56 | 2.27 | 3.39 |
| 1 1/2 | 1.900 | 48.3 | 0.145 | 3.68 | 2.72 | 4.05 |
| 2 | 2.375 | 60.3 | 0.154 | 3.91 | 3.65 | 5.44 |
| 2 1/2 | 2.875 | 73.0 | 0.203 | 5.16 | 5.79 | 8.63 |
| 3 | 3.500 | 88.9 | 0.216 | 5.49 | 7.58 | 11.29 |
| 3 1/2 | 4.000 | 101.6 | 0.226 | 5.74 | 9.11 | 13.57 |
| 4 | 4.500 | 114.3 | 0.237 | 6.02 | 10.79 | 16.07 |
| 5 | 5.563 | 141.3 | 0.258 | 6.55 | 14.62 | 21.77 |
| 6 | 6.625 | 168.3 | 0.280 | 7.11 | 18.97 | 28.26 |
| 8 | 8.625 | 219.1 | 0.322 | 8.18 | 28.55 | 42.55 |
| 10 | 10.750 | 273.0 | 0.365 | 9.27 | 40.48 | 60.31 |
| 12 | 12.750 | 323.8 | 0.406 | 10.31 | 53.52 | 79.73 |
| 14 | 14 | 355.6 | 0.375 | 11.13 | 54.57 | 94.55 |
| 16 | 16 | 406.4 | 0.500 | 12.70 | 82.77 | 123.30 |
| 18 | 18 | 457.0 | 0.562 | 14.27 | 104.67 | 155.80 |
| 20 | 20 | 508.0 | 0.594 | 15.09 | 123.11 | 183.42 |
| 24 | 24 | 610.0 | 0.688 | 17.48 | 171.29 | 255.41 |
| 32 | 32 | 813.0 | 0.688 | 17.48 | 230.08 | 342.91 |
Chemical Composition of Schedule 40 Carbon Steel Pipe
Schedule 40 pipe refers to the nominal wall thickness, not the grade. Therefore, the chemical composition of a pipe schedule is not necessarily uniform.
However, schedule 40 pipe is made from low-carbon steel, usually grade A53 steel pipe. Its chemical composition also varies across types and welds, but as a point of reference, type S seamless weld A53 steel looks something like this:
Carbon – 0.25% (max)
Manganese – 0.95% (max)
Phosphorous – 0.05% (max)
Sulfur – 0.045% (max)
Copper – 0.4% (max)
Nickel – 0.4% (max)
Chromium – 0.4% (max)
Molybdenum – 0.15% (max)
Vanadium – 0.08% (max)
Go here for more about " Schedule 80 Carbon Steel Pipe Thickness"
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