Features Sometimes called a blanking flange; use to blank off pipelines, valves, and pumps, or as an inspection cover. Suitable for use with Schedule 40 or 80 stainless steel pipe, in applications with air, water, natural gas, and steam. Specific Fitting Shape / Blind Flange Connection Surface / Raised Face Nominal Pipe Size / 1 in Fitting Connection Type / Flanged x Blind Flange Outside Diameter / 4 7/8 in Flange Thickness / 11/16 in Overall Length / 11/16 in Pipe Fitting Material / 316/316L Stainless Steel, Stainless Steel Material Grade / 316/316L Class / Class 300 Maximum Operating Pressure / 720 psi Max. Steam Pressure / 300 psi Number of Bolt Holes / 4 Bolt Circle Diameter / 3 1/2 in Bolt Hole Diameter / 3/4 in Standards / ASME A182, ASME B16.5