Schedule 40 Socket Weld Flange Raised Face 3/4 in Nominal Pipe Size Flanged x Socket Weld 4 5/8 in Flange Outside Diameter 9/16 in Flange Thickness 1 in Overall Length Stainless Steel 316/316L Class Class 300 720 psi Maximum Operating Pressure 300 psi Max Steam Pressure Number of Bolt Holes 4 3 1/4 in Bolt Circle Diameter 3/4 in Bolt Hole Diameter