Blind Flange Flat 4 in Nominal Pipe Size 9 in Flange Outside Diameter 1 in Flange Thickness Schedule 80 Class Class 150 For Pipe Schedule 80 CPVC 150 psi Maximum Operating Pressure 210 Degrees F Number of Bolt Holes 8 7 1/2 in Bolt Circle Diameter 3/4 in Bolt Hole Diameter 1 in Overall Length Gray