Quote Cart
Gas Pressure Drop Calculator
Calculate the pressure drop in a gas pipe from the flow rate, pipe diameter, and length. Verify the pressure drop stays within the allowable 1 mbar limit for low-pressure systems.
Gas Pressure Drop in Pipes
As gas flows through a pipe, friction between the gas and pipe walls causes a pressure drop. For low-pressure natural gas (21 mbar), the total pressure drop from the meter to the appliance must not exceed 1 mbar.
If the calculated pressure drop exceeds 1 mbar, increase the pipe diameter or reduce the number of fittings to bring it within limits.
Frequently Asked Questions
What is the maximum pressure drop for domestic gas?
For low-pressure natural gas (21 mbar at meter), the maximum total pressure drop to the appliance is 1 mbar, ensuring 20 mbar at the appliance inlet.
How do I reduce gas pressure drop?
Increase the pipe diameter, reduce the number of elbows and fittings, or shorten the pipe run. Each fitting adds equivalent length that contributes to pressure loss.
Gas Pressure Drop Calculator
Related Gas Tools
Gas Rate Calculator
Calculate gas input rate (kW) from gas flow rate and calorific value.
Gas Pipe Size Calculator
Determine the correct gas pipe diameter from flow rate and pipe length.
m³/h to kW Calculator
Convert gas flow rate (m³/h) to heat input (kW) using calorific value.
kW to m³/h Calculator
Convert heat input (kW) to gas flow rate (m³/h) using calorific value.
Need Professional Help?
Post a request and get competing quotes from rated HVAC engineers nationwide.