Nipple Application Air Natural Gas Non-Potable Water Propane Steam Fitting Compatibility Schedule 40 Inside Diameter 1 3/8 in Material Stainless Steel Material Grade 316 Maximum Operating Pressure 150 psi @ 72 Degrees F Maximum Steam Pressure 150 psi @ 360 Degrees F Metal Pipe Construction Welded Nominal Pipe Size 1 1/4 in Outside Diameter 1 21/32 in Overall Length 4 in Pipe Weld Type Electric Resistance Weld