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Method of rating a pipe's durability against pressure From Wikipedia, the free encyclopedia
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.[1]
Common nominations are SDR11, SDR17, SDR26 and SDR35. Pipes with a lower SDR can withstand higher pressures.
Pipe outside diameter
Pipe wall thickness
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