Nipple Application Air Natural Gas Non-Potable Water Propane Steam Fitting Compatibility Schedule 40 Gravity Flow No Inside Diameter 4 in Material Stainless Steel Material Grade 316 Maximum Operating Pressure 678 psi Maximum Operating Temperature 650 Degrees F Metal Pipe Construction Welded Minimum Operating Temperature -20 Degrees F Nominal Pipe Size 4 in Outside Diameter 4 1/2 in Overall Length 6 in Pipe Weld Type Continuous Weld Schedule Schedule 40