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What is the SDR (SODR, SIDR)?

April 26, 2017SDR

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What is the SDR (SODR, SIDR)?

1 Answer

0

10 Posted

• SDR is the Size to Diameter Ratio (or Standard Dimension Ratio), that is, the ratio of the inside diameter (SIDR) or outside diameter (SODR) of the duct or innerduct to the wall thickness of the duct or innerduct. The smaller the SDR number the thicker the wall of the duct. Smaller SDR numbers also mean that the duct or innerduct has higher tensile strength and greater crush resistance than a comparable product with a higher number.