Flange, Raised, 6 in Nominal Pipe Size, Flanged x Weld Neck, 12 1/2 in Flange Outside Diameter, 1 3/8 in Flange Thickness, 12 1/2 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 12, 10 5/8 in Bolt Circle Diameter, 3/4 in Bolt Hole Diameter