How is pipe thickness measured in accordance with ANSI standards?

Pipe thickness in accordance with ANSI standards is predominantly indicated by the Schedule number. The Schedule number defines the wall thickness of a pipe, and it is related to the nominal pipe size and the material used. As the Schedule number increases, the wall thickness of the pipe also increases. This is a critical aspect for determining the pressure rating of the pipe, as thicker walls can withstand higher pressures.

In practice, piping types such as carbon steel, stainless steel, and PVC can have their dimensions standardized based on these schedules. This system allows for easier specifications in projects and ensures consistency across different manufacturers.

Measurements in inches and millimeters refer to pipe diameter rather than thickness and thus do not accurately represent the thickness directly. While a caliper can be used to measure the wall thickness, it doesn't define the standardized method of expressing pipe thickness as established by ANSI. The weight of the pipe alone does not give a reliable measure of wall thickness either, as weight can vary based on alloy or material density. Therefore, the Schedule number remains the primary means of identifying pipe thickness according to ANSI standards.