SCH is the abbreviation of Schedule

We often see the SCH appearing on the page describing the steel pipe, pipe fittings and flanges. Then what is meaning of SCH? In fact, SCH is the abbreviation of Schedule, which is the wall thickness symbol of American standard pipe fittings and steel pipes.

SCH5, SCH10, SCH20, SCH40, SCH80 and so on represent different wall thicknesses.

Specific wall thickness values can be found in ANSI B36.10, ANSI B36.19 American Standard Steel Pipe Standard.