Conversion Factors


Pipe weight for Austenitic Stainless steel


NPS InchesOD Inches5104080160
1/8 0.405 0.189 @ 0.049" *0.249 @ 0.068" *0.319 @ 0.095"
1/4 0.540 0.334 @ 0.065" *0.430 @ 0.088" *0.542 @ 0.119"
3/8 0.645 0.429 @ 0.065" *0.575 @ 0.091" *0.748 @ 0.126"
1/2 0.840 0.545 @ 0.065" 0.680 @ 0.083" *0.862 @ 0.109" *1.10 @ 0.147" *1.32 @ 0.187"
3/4 1.050 0.693 @ 0.065" 0.868 @ 0.083" 1.15 @ 0.113" *1.52 @ 0.157" *1.96 @ 0.218"
1 1.315 0.879 @ 0.065" 1.42 @ 0.109" 1.70 @ 0.133" *2.20 @ 0179" *2.88 @ 0.250"
1-1/4 1.660 1.12 @ 0.065" 1.83 @ 0.109" 2.30 @ 0.140" 3.04 @ 0.191"
1-1/2 1.900 1.29 @ 0.065" 2.11 @ 0.109" 2.57 @ 0.145" 3.68 @ 0.200"
2 2.375 1.63 @ 0.065" 2.67 @ 0.109" 3.7 @ 0.154" 5.09 @ 0.218"
2-1/2 2.875 1.98 @ 0.083" 3.58 @ 0.120" 5.87 @ 0.203"
3 3.500 3.07 @ 0.083" 4.39 @ 0.120" 8.01 @ 0.226"
3-1/2 4.000 3.52 @ 0.083" 5.04 @ 0.120" 9.23 @ 0.226"

Stock Lengths: 20 or 21 feet depending on alloys. Other lengths available.
Weight (lbs/ft) = 10.78 (D-t) t
Where: D = Outside diameter, inch
t = Minimum Wall Thickness, inch
* Welded & Drawn or Seamless only size.