Nitrogen Pressure Test Calculator
Calculates nitrogen cylinder/pack requirements for pneumatic pressure testing of pipelines and vessels per ASME B31.8 and 49 CFR Part 192. Includes real gas compressibility, temperature corrections, and recommended hold times.
Calculation Mode
Pipe Specifications
feet
inches
Pipe Sections
Length (ft)
Diameter (in)
Test Parameters
psig
°F
°F
Engineering Notes:
Calculations use real gas law with N₂ compressibility factor (Z)
10% safety factor applied for operational losses and leakage
Minimum 100 psig residual pressure assumed in bottles
Recommended hold times based on pipe diameter (49 CFR 192 min: 1 hr)
For volumes >50,000 SCF, consider tube trailer delivery
Learn the Theory
Comprehensive coverage of nitrogen pressure testing per ASME B31.8, test pressures, temperature corrections, and leak detection.