Socket Weld Flange Raised Face 4 in Nominal Pipe Size Flanged x Socket Weld 12 1/4 in Flange Outside Diameter 2 1/16 in Flange Thickness 12 1/4 in Overall Length Steel Black Coated Class Class 1500 For Pipe Schedule XXH 3 600 psi Maximum Operating Pressure 3 600 psi Max Steam Pressure 80 Degrees to 780 Degrees F Number of Bolt Holes 8 1 3/8 in Bolt Hole Diameter