Dimensions of SDR - 11 (Class 1) CPVC Pipes IS 15778 Nominal Size in Inch ½ 1 1 1 ½ 2 Wall thickness 27 C 15.9 22.2 28.6 34.9 41.3 54.0 1.7 2.0 2.6 3.2 3.8 4.9 2.2 2.5 3.1 3.7 4.3 5.5 27.6 27.6 27.6 27.6 27.6 27.6 Nominal OD 82 C 0 2 Working Pressure/Kg/cm 0 3 / 4 1 / 4 6.8 6.8 6.8 6.8 6.8 6.8 Dimensions of SDR - 13.5 (Class 2) CPVC Pipes IS 15778 Nominal Size in Inch ½ 1 1 1 ½ 2 Wall thickness 27 C 15.9 22.2 28.6 34.9 41.3 54.0 1.4 1.7 2.1 2.6 3.1 4.0 1.9 2.2 2.6 3.1 3.6 4.6 21.8 21.8 21.8 21.8 21.8 21.8 Nominal OD 82 C 0 2 Working Pressure/Kg/cm 0 3 / 4 1 / 4 5.5 5.5 5.5 5.5 5.5 5.5