Features Commonly used to blank off pipelines, valves, and pumps, or as an inspection cover, this GRAINGER APPROVED blind flange allows you to bolt 2 flanges together with a كوق to form a tight seal that still eases access to the piping system. This model is sometimes referred to as “blanking flange” and is for use with air, water, oil, natural gas, or steam Specific Fitting Shape / Blind Flange Pipe Fitting Material / Black Steel Class / 150 Standards / ASTM A-197, ASTM A47, ASME B16.3 and B16.4, UL Listed, FM Approved