Where can I find the SDR (Standard Dimension Ratio) for my piping?

The SDR is the ratio of the pipe’s Outside Diameter (OD) to its Wall Thickness. It is calculated using the following formula:

SDR = D/s

Where:

  • D = Outside Diameter

  • s = Minimum Wall Thickness

You can find the comprehensive industry-standard tables for various materials (PVC, PE, HDPE) at the Engineering Toolbox.