Commercial Gas Pressure & Pipe Sizing
Working pressure, pressure loss, regulators, governors, boosters, pipe sizing and diversity for commercial gas installations.
Most commercial gas faults that look like appliance problems are really pressure problems. A burner that lights on a cold morning and locks out at full fire, a kitchen where the ranges go soft when the fryers are on, a boiler cascade that will not reach output — all usually trace back to supply pressure, pressure loss or regulation.
These guides cover how pressure behaves from the meter to the burner, how to diagnose low pressure, and how to size pipework and boosters so the problem never appears in the first place.
Guides in this section
- Commercial Gas Working Pressure Explained
What working pressure and standing pressure mean on a commercial natural gas installation, normal values and how to measure them.
- Gas Inlet Pressure vs Burner Pressure
The difference between appliance inlet pressure and burner (manifold) pressure, why both matter and how they are set.
- Causes of Low Gas Pressure on Commercial Installations
The common causes of low gas pressure in commercial buildings and a structured method for finding which one you have.
- Commercial Gas Pressure Drop: How Much Is Acceptable?
How pressure drop across commercial gas pipework is measured, what drives it, and how much loss designers normally allow.
- Maximum Permissible Pressure Loss in Gas Pipework
The pressure loss limits used when designing commercial gas installations, and how they relate to meter outlet pressure and appliance requirements.
- Commercial Gas Pipe Sizing Calculations
How commercial gas pipework is sized: load, diversity, length, equivalent length for fittings, Pole's formula and worked examples.
- Diversity Calculations for Commercial Gas
What diversity means in commercial gas design, when it can be applied, and when it must not be — with kitchen and boiler examples.
- How to Calculate Gas Consumption from kW
Convert appliance kW ratings into gas flow in m³/h, including gross vs net input, calorific value and meter timing checks.
- Gas Meter Pressure Problems
How to diagnose pressure problems at commercial gas meters: regulator faults, undersized meters, filters and who is responsible for the fix.
- Gas Governor Faults: Symptoms and Diagnosis
Common faults on commercial gas governors and appliance regulators, how each shows up, and how to test a governor.
- How Commercial Gas Regulators Work
The working principle of commercial gas pressure regulators: spring, diaphragm, valve, lock-up, relief and slam-shut protection.
- How a Commercial Gas Booster Works
Commercial gas booster operation: when a booster is needed, controls, low-pressure cut-off, bypass, non-return valve and gas transporter approval.