ASME B31.8 Compliant | Pressure Drop, Flow Capacity, or Pipe Sizing
Typical Values:
• Gas Gravity: 0.55-0.65 (natural gas)
• Roughness: 0.0007" (new), 0.002" (aged)
• Efficiency: 0.95 (new), 0.92 (good), 0.85 (fair)
• Elevation: + uphill, - downhill
Understand pipeline hydraulics principles, calculations, and industry applications
Use when designing a new pipeline or verifying an existing system. Input the desired flow rate and inlet pressure to find the resulting outlet pressure and pressure drop. Most common calculation for pipeline design.
Application: Pipeline sizing, capacity verification, operational planning
Given: Flow rate (Q), Inlet pressure (P₁), Diameter (D)
Calculate: Outlet pressure (P₂), Pressure drop (ΔP)
This calculator implements ASME B31.8 gas pipeline equations to calculate pressure drop, flow capacity, or required pipe size. It accounts for gas compressibility (Z-factor), temperature, specific gravity, and pipeline efficiency.
The three modes are: calculate pressure drop given flow rate and pipe diameter, calculate flow capacity given inlet and outlet pressures, or calculate required pipe diameter given flow rate and pressure constraints.
Gas compressibility factor (Z) reduces gas density from ideal conditions. Higher Z-factors mean less gas mass per unit volume, affecting pressure drop calculations. The calculator uses the average pressure and temperature to determine Z at pipeline conditions.