Pipe Application Air Natural Gas Non-Potable Water Propane Steam Finish/Coating Galvanized Fitting Compatibility Class 150 Gravity Flow No Inside Diameter 4 in Material Stainless Steel Material Grade 304 Maximum Operating Pressure 1160 psi @ 650 Degrees F Maximum Operating Temperature 600 Degrees F Maximum Steam Pressure 856 psi @ 300 Degrees F Metal Pipe Construction Welded Minimum Operating Temperature -20 Degrees F Nominal Pipe Size 4 in Outside Diameter 4 1/2 in