SCH is the code for pipe wall thickness, and SCH is the abbreviation of schedule, which is the word used for the wall thickness grade of American standard steel pipes. The SCH regulation is the ratio of the design pressure of the pipe to the allowable stress of the material at the design temperature multiplied by 1000, and after rounding value. That is: Sch=P/[σ]t×1000. SCH wall thickness comparison table (sch series pipe size and thickness comparison table) is as shown below:
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