Seamless steel pipe size chart

Date:2024-07-16

Seamless steel pipes are produced in various sizes to meet different industrial requirements. The size chart below includes the outer diameter (OD), wall thickness, and corresponding weight per unit length. Note that the actual availability may vary depending on the manufacturer.

Nominal Pipe Size (NPS)	Outer Diameter (OD)	Schedule	Wall Thickness	Weight (kg/m)
1/8	10.3 mm	40	1.73 mm	0.24
1/4	13.7 mm	40	2.24 mm	0.43
3/8	17.1 mm	40	2.31 mm	0.56
1/2	21.3 mm	40	2.77 mm	0.85
3/4	26.7 mm	40	2.87 mm	1.13
1	33.4 mm	40	3.38 mm	1.68
1 1/4	42.2 mm	40	3.56 mm	2.40
1 1/2	48.3 mm	40	3.68 mm	2.90
2	60.3 mm	40	3.91 mm	3.84
2 1/2	73.0 mm	40	5.16 mm	5.87
3	88.9 mm	40	5.49 mm	7.58
4	114.3 mm	40	6.02 mm	10.84
5	141.3 mm	40	6.55 mm	14.72
6	168.3 mm	40	7.11 mm	18.99
8	219.1 mm	40	8.18 mm	28.57
10	273.1 mm	40	9.27 mm	40.48
12	323.9 mm	40	10.31 mm	52.65
14	355.6 mm	40	11.13 mm	63.49
16	406.4 mm	40	12.70 mm	83.07
18	457.0 mm	40	14.27 mm	103.48
20	508.0 mm	40	15.09 mm	122.79
24	609.6 mm	40	17.48 mm	164.57

Notes:

Nominal Pipe Size (NPS): The approximate size of the pipe.

Outer Diameter (OD): The actual outside diameter of the pipe.

Schedule: The wall thickness designation of the pipe.

Wall Thickness: The actual thickness of the pipe wall.

Weight: The weight per meter length of the pipe.

This chart provides a general overview of common sizes for seamless steel pipes. For specific requirements, including different schedules or grades, it is advisable to refer to detailed specifications from pipe manufacturers or industry standards.