Technical FAQs

Miscellaneous

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What is the difference between "DR" and "SDR"?

Dimension Ratio (DR) and Standard Dimension Ratio (SDR) both refer to the same ratio, (Outside
Diameter [OD] / Wall Thickness) – Refer to Figure 1 below.

 

For more information refer to the following link: Dimension Ratio (DR) Explained for PVC Pipe