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  • Standard dimension ratio

    Standard dimension ratio


    • Standard dimension ratio (SDR) is a method of rating a pipe's durability against pressure. The standard dimension ratio describes the correlation between the pipe dimension and the thickness of the pipe wall.

      Common nominations are SDR11, SDR17 and SDR35. Pipes with a lower SDR can withstand higher pressures.

      Pipe outside diameter

      Pipe wall thickness



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