Malleable Iron Union, Class 150, 3/4 in x 3/4 Fitting Pipe Size, Female NPT x Male NPT, 1 PackMfr # 5P592 Pipe Fitting Material Malleable Iron Specific Fitting Shape Union Fitting Schedule Class Class 150 Basic Pipe Fitting Material Metal Basic Pipe Fitting Shape Union Fitting Connection Type FNPT Item Union Standards ASME B16. 39, ASTM A197 Pipe Fitting Schedule Class Class 150 Pipe Fitting Connection Type FNPT Specific Pipe Fitting Shape Union Saturated Steam Pressure 150 PSI Temp. Range 20 Degrees to 366 Degrees F Max. Pressure 300 psi@150