Nipple Application Air Natural Gas Oil Potable Water Steam Fitting Compatibility Class 150 Gravity Flow No Inside Diameter 3 in Material Red Brass Material Grade ASTM B43 Maximum Operating Pressure 144 psi @ 450 Degrees F Maximum Operating Temperature 400 Degrees F Maximum Steam Pressure 576 psi @ 300 Degrees F Metal Pipe Construction Seamless Minimum Operating Temperature -20 Degrees F Nominal Pipe Size 3 in Outside Diameter 3 1/2 in Overall Length 8 in