Features Designed to blank off pipelines, valves, and pumps, or as an inspection cover, this GRAINGER APPROVED blind flange features 304 stainless steel construction for very good corrosion resistance. Model is sometimes referred to as blanking flange and is ideal for use with air, water, oil, natural gas, and steam. Specific Fitting Shape / Blind Flange Fitting Connection Type / Welded Pipe Fitting Material / 304 Stainless Steel Class / 150 Temp. Range / -60 Degrees to 450 Degrees F Standards / ANSI B16.5, ASTM A182