Standard dimension ratio

Method of rating a pipe's durability against pressure

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.

S D R = d o s {\displaystyle SDR={\frac {d_{o}}{s}}}

d o {\displaystyle d_{o}} Pipe outside diameter

s {\displaystyle s} Pipe wall thickness

References

  1. ^ "SDR - Standard Dimension Ratio and S - Pipe Series".