Kalpana Kalpana (Editor)

Standard dimension ratio

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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.

S D R = d o s

d o Pipe outside diameter

s Pipe wall thickness

References

Standard dimension ratio Wikipedia