OD in mm ID in mm Size in Inch
48 40 1.5"
60 50 2"
88 80 3"
113 100 4"
140 125 5"
165 150 6"
180 163 7"
200 175 7.5"
225 200 8"

Nominal Diameter Outer Diameter of pipe Wall Thickness
CM Casing Pipes CS Casing Pipes
  Min Max Min Max Min Max
40mm 48.0 48.2 3.5 4.0 - -
50mm 60.0 60.2 4.0 4.6 - -
80mm 88.0 88.3 4.0 4.6 - -
100mm 113.0 113.3 5.0 5.7 - -
125mm 140.0 140.4 6.5 7.3 - -
150mm 165.0 165.4 7.5 8.5 5.7 6.5
175mm 200.0 200.5 8.8 9.8 7.0 7.8
200mm 225.0 225.5 10.0 11.2 7.6 8.8
250mm 280.0 280.5 12.5 14 9.6 11.0