Socket Weld Flange Raised Face 8 in Nominal Pipe Size Flanged x Socket Weld 13 1/2 in Flange Outside Diameter 1 in Flange Thickness Steel Anodized Class Class 150 For Pipe Schedule 40 150 psi Maximum Operating Pressure -29 Degrees to 425 Degrees F Number of Bolt Holes 8 7/8 in Bolt Circle Diameter 3/4 in Bolt Hole Diameter