Standard dimension ratio (SDR) is a method of rating a pipe's durability against
pressure
Pressure (symbol: ''p'' or ''P'') is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure (also spelled ''gage'' pressure)The preferred spelling varies by country and e ...
. 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.
Pipe
outside diameter
This page lists the standard US nomenclature used in the description of mechanical gear construction and function, together with definitions of the terms. The terminology was established by the American Gear Manufacturers Association (AGMA), unde ...
Pipe wall thickness
References
{{Reflist
Piping