Pipe Diameter and Circumference

Pipe Diameter and Circumference

Use this helpful chart to correlate the pipe size, outside diameter, and circumference of a pipe in your industrial water projects.

Outside 
Pipe Type Pipe Size Diameter (O.D. -inches) Circumference (inches)
Sch 40 Galvanized 3/4 1.05 3.3
Sch 40 Galvanized 1 1.315 4.1
Sch 40 Galvanized 1 1/4 1.66 5.2
Sch 40 Galvanized 1 1/2 1.9 6.0
Sch 40 Galvanized 2 2.375 7.5
Sch 40 Galvanized 2 1/2 2.875 9.0
Sch 40 Galvanized 3 3.5 11.0
Sch 40 Galvanized 4 4.5 14.1
Sch 40 Galvanized 6 6.625 20.8
Sch 40 Galvanized 8 8.625 27.1
Sch 40 Galvanized 10 10.75 33.8
Sch 40 Galvanized 12 12.75 40.0

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