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

References

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