SDR meaning in Measurement Unit ?

Answer:

What is Standard Dimension Ratio mean?

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 {\displaystyle SDR={\frac {d_{o}}{s}}}

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

s {\displaystyle s} Pipe wall thickness

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