Pipe Coupling Dimensions - Socket Weld &
Schedule, often shortened as SCH, is a North American standard that refers to wall thickness of a pipe or pipe fitting. What is schedule 40, SCH80? Higher schedules mean thicker walls that can resist higher pressures. Pipe standards define these wall thicknesses: SCH 5, 5S, 10, 10S, 20, 30, 40, 40S, 60, 80, 80S, 100, 120, 140, 160, STD, XS and XXS.
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