Dimensional detail of sdr-11 (class-1) and Sdr-13.5 (class-2)
CPVC PIPES CONFORMING TO IS:15778:2007

Size Outside Diameter (mm) Tolerance Min. Wall Thickness (mm)
mm (inch) Min. Max. SDR-11 SDR-13.5
15 (1/2″) 15.80 16.00 ± 0.08 1.70 1.40
20 (3/4″) 22.20 22.40 ± 0.08 2.00 1.70
25 (1″) 28.40 28.80 ± 0.08 3.20 2.60
32 (1-1/4″) 34.70 35.10 ± 0.08 3.20 2.60
40 (1-1/2″) 41.10 41.50 ± 0.10 3.80 3.10
50 (2″) 54.70 54.30 ± 0.10 4.90 4.00