Black-Coated Steel Pipe Flange Flat Face 2 1/2 in Nominal Pipe Size Flanged x Lap-Joint 7 1/2 in Flange Outside Diameter 15/16 in Flange Thickness 7 1/2 in Overall Length Steel Black Coated Class Class 300 For Pipe Schedule 80 725 psi Maximum Operating Pressure 725 psi Max Steam Pressure 80 Degrees to 780 Degrees F Number of Bolt Holes 8 3/4 in Bolt Hole Diameter