How To Measure The Diameter Of Galvanized Pipe

When you buy or order galvanized pipe, you must specify the pipe you need by its nominal size. Nominal size is closely related to the inside diameter of the pipe but is not precisely the size it actually measures. To find the nominal size, you can measure the inside diameter of your pipe directly, or you can estimate the inside diameter by measuring the pipe's outside diameter. When measuring from the outside, keep in mind that galvanized pipe comes in three weights with different wall thicknesses.