Grainger Approved, Solutions That Make a Difference Stainless Steel Blind 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. Pipe Fitting Material / Forged 304 Stainless Steel Fitting Schedule/Class / Class 300 Pipe Size - Pipe Fitting / 4 in Fitting Connection Type / Bolted Max. Pressure / 720 psi Max. Steam Pressure / 300 psi Outside Dia. / 10 in Number of Holes / 8 Standards / ANSI B16.5, ASTM-SA182