Features Fitting is interchangeable with black cast-iron or steel. For low-pressure plumbing applications including air, water, natural gas, and steam. Nominal Pipe Size / 2 in Fitting Connection Type / Flanged x FNPT Overall Length / 1 in Pipe Fitting Material / Malleable Iron Class / Class 150 Temp. Range / -20 Degrees to 366 Degrees F Standards / ASTM A197