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.[1]

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

SDR=\frac{d_o}{s}

d_o Pipe outside diameter

s Pipe wall thickness

References

  1. ↑ http://www.engineeringtoolbox.com/sdr-standard-dimension-ratio-d_318.html
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