Schedule 40 carbon steel pipe size chart and dimensions

Date:2024-10-18Tags:carbon steel pipe, Schedule 40 , API 5L
Pipeline specifications (Schedule, abbreviated as SCH) are important units used in the pipeline industry to measure the nominal wall thickness of steel pipes. With the continuous change of industrial needs, pipe manufacturers used to use only three specifications in the past - standard, extra strong and double extra strong, which were not precisely defined and could not meet the actual engineering needs. Therefore, up to 14 different specifications have been introduced in modern steel pipe production, among which Schedule 40 is the most common and widely used one.

Basics of Pipeline Specifications

Each pipe specification (SCH) corresponds to a specific wall thickness. The larger the number, the thicker the wall thickness of the pipe. For example, Schedule 40 represents medium-thick pipes, which are commonly used in a variety of engineering and industrial fields. Steel pipes are classified according to their wall thickness and the outer and inner diameters of their materials. Pipes of different specifications have different pressure bearing capacities.

For schedule 40 Carbon Steel Pipe , the wall thickness is moderate, which can ensure high pressure resistance without adding unnecessary weight, so it is widely used in many fields such as construction, engineering, and pipeline transportation. There are two main anti-corrosion coating processes for schedule 40 carbon steel pipe in practical applications: online galvanizing and hot-dip galvanizing. Hot-dip galvanized pipes are immersed in a hot-melt zinc pool to make the zinc and steel surface more effectively bonded, thereby enhancing the corrosion resistance of the pipe.

Common uses of schedule 40 carbon steel pipes

Schedule 40 steel pipe is a widely used pipe material that is widely used in water and gas pipelines, building support, mechanical structures and other fields. This pipe is known for its stable performance and strong durability, and can withstand medium pressure, making it an ideal choice for many industrial and commercial projects.

In addition, No. 40 carbon steel pipe can be used not only for liquid transportation, but also for structural support, such as building frames, mechanical supports, etc. Due to the excellent mechanical properties and medium pressure bearing capacity of this pipe, it can effectively reduce risks and extend the service life of the project during construction.

Pressure rating and wall thickness of schedule 40 carbon steel pipes

The pressure rating and wall thickness of the pipe are determined according to its specification number. For No. 40 carbon steel pipes, the pressure rating is generally medium, suitable for most ordinary industrial and civil projects. Typically, Schedule 40 pipes are available in diameters up to 24 inches and wall thicknesses up to 46 mm.

It is worth noting that the wall thickness of Schedule 40 steel pipes not only affects the pressure-bearing capacity of the pipe, but also determines the weight of the pipe. An increase in carbon content generally makes the pipe lighter, but an increase in wall thickness and outer diameter increases the weight. Therefore, the weight of Schedule 40 carbon steel pipe is a combination of wall thickness, diameter, and carbon content.


Schedule 40 Carbon Steel Pipe Pressure Rating

Maximum Allowable Pressure (psi) (kPa)
NPS Outside Diameter (OD) Schedule
(in) (in) (mm) 40
1/4 0.54 13.7 7985 55057
3/8 0.675 17.1 6606 45548
1/2 0.84 21.3 6358 43838
3/4 1.05 26.7 5273 36357
1 1.315 33.4 4956 34172
1 1/4 1.66 42.2 4133 28497
1 1/2 1.9 48.3 3739 25780
2 2.375 60.3 3177 21905
2 1/2 2.875 73 3460 23857
3 3.5 88.9 3024 20850
3 1/2 4 102 2769 19092
4 4.5 114 2581 17796
5 5.563 141 2273 15672
6 6.625 168 2071 14280
8 8.625 219 1829 12611
10 10.75 273 1664 11473
12 12.75 324 1560 10756
14 14 356 1533 10570
16 16 406 1531 10556
18 18 457 1530 10549
20 20 508 1455 10032
22 22 559
24 24 610 1405 9687
30 30 762
32 32 813 1054 7267
34 34 864 992 6840
36 36 914 1021 7040
42 42 1067 875 6033


Schedule 40 Carbon Steel Pipe size chart, dimensions, wall thickness and weight

Nominal size [inches] Outside diameter [inches] Outside diameter [mm] Wall thickness [inches] Wall thickness [mm] Weight [lb/ft] Weight [kg/m]
1/8 inches 0.405 inches 10.3 MM 0.068 inches 1.73 MM 0.24 lb/ft 0.37 kg/m
1/4 inches 0.540 inches 13.7 MM 0.088 inches 2.24 MM 0.42 lb/ft 0.84 kg/m
1/2 inches 0.840 inches 21.3 MM 0.109 inches 2.77 MM 0.85 lb/ft 1.27 kg/m
3/4 inches 1.050 inches 26.7 MM 0.113 inches 2.87 MM 1.13 lb/ft 1.69 kg/m
1 inches 1.315 inches 33.4 MM 0.133 inches 3.38 MM 1.68 lb/ft 2.50 kg/m
1 1/4 inches 1.660 inches 42.2 MM 0.140 inches 3.56 MM 2.27 lb/ft 3.39 kg/m
1 1/2 inches 1.900 inches 48.3 MM 0.145 inches 3.68 MM 2.72 lb/ft 4.05 kg/m
2 inches 2.375 inches 60.3 MM 0.154 inches 3.91 MM 3.65 lb/ft 5.44 kg/m
2 1/2 inches 2.875 inches 73.0 MM 0.203 inches 5.16 MM 5.79 lb/ft 8.63 kg/m
3 inches 3.500 inches 88.9 MM 0.216 inches 5.49 MM 7.58 lb/ft 11.29 kg/m
3 1/2 inches 4.000 inches 101.6 MM 0.226 inches 5.74 MM 9.11 lb/ft 13.57 kg/m
4 inches 4.500 inches 114.3 MM 0.237 inches 6.02 MM 10.79 lb/ft 16.07 kg/m
5 inches 5.563 inches 141.3 MM 0.258 inches 6.55 MM 14.62 lb/ft 21.77 kg/m
6 inches 6.625 inches 168.3 MM 0.280 inches 7.11 MM 18.97 lb/ft 28.26 kg/m
8 inches 8.625 inches 219.1 MM 0.322 inches 8.18 MM 28.55 lb/ft 42.55 kg/m
10 inches 10.750 inches 273.0 MM 0.365 inches 9.27 MM 40.48 lb/ft 60.31 kg/m
12 inches 12.750 inches 323.8 MM 0.406 inches 10.31 MM 53.52 lb/ft 79.73 kg/m
14 inches 14 inches 355.6 MM 0.375 inches 11.13 MM 54.57 lb/ft 94.55 kg/m
16 inches 16 inches 406.4 MM 0.500 inches 12.70 MM 82.77 lb/ft 123.30 kg/m
18 inches 18 inches 457.0 MM 0.562 inches 14.27 MM 104.67 lb/ft 155.80 kg/m
20 inches 20 inches 508.0 MM 0.594 inches 15.09 MM 123.11 lb/ft 183.42 kg/m
24 inches 24 inches 610.0 MM 0.688 inches 17.48 MM 171.29 lb/ft 255.41 kg/m
32 inches 32 inches 813.0 MM 0.688 inches 17.48 MM 230.08 lb/ft 342.91 kg/m


Multiple material options for Schedule 40 carbon steel pipes
Schedule 40 carbon steel pipes are not only available in carbon steel versions, but can also be made of stainless steel, aluminum, alloy steel, and other materials. Common carbon steel pipe materials include ASTM A106 Grade B, A53 Gr.B, A333 Grade 6, etc. These carbon steel pipes can be used in low temperature environments, oil and gas transportation, steam pipelines and other fields. Manufacturers can provide customized material selection according to different engineering requirements to ensure that the pipe has excellent performance under specific environmental conditions.

In addition, API 5L Gr. B carbon steel and galvanized iron materials are also commonly used in the production of No. 40 pipes. These materials have good corrosion resistance and wear resistance, allowing No. 40 carbon steel pipes to maintain stable performance under harsh environmental conditions.


Summary

Schedule 40 carbon steel pipes is a widely used pipe specification with moderate wall thickness, strong pressure bearing capacity, and can be treated with corrosion protection through a variety of processes. Whether it is used for building frames, industrial pipelines, or for conveying liquids or gases, No. 40 carbon steel pipes can become an indispensable and important pipe material in engineering with its stable performance and wide range of material options.
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