Black-Coated Steel Pipe Nipple Application Air Natural Gas Oil Potable Water Steam Finish/Coating Black Coated Fitting Compatibility Schedule 40 Gravity Flow No Inside Diameter 1 3/8 in Manufacture Location Globally Sourced Material Steel Material Grade Not Applicable Maximum Operating Pressure 125 psi Maximum Operating Temperature 225 Degrees F Maximum Steam Pressure 300 psi Metal Pipe Construction Welded Minimum Operating Temperature -20 Degrees F Nominal Pipe Size 1 1/4 in