Flange, Raised, 1 1/2 in Nominal Pipe Size, Flanged x Socket Weld, 6 1/8 in Flange Outside Diameter, 3/4 in Flange Thickness, 6 1/8 in Overall Length, Steel, Not Applicable, Class Class 300, For Pipe Schedule Schedule 80, 725 psi @ 72 Degrees F Maximum Operating Pressure, 725 psi Max. Steam Pressure, 80 Degrees to 780 Degrees F, Number of Bolt Holes 4, 4 1/2 in Bolt Circle Diameter, 3/4 in Bolt Hole Diameter