Pressure Testing & Purging
Leak testing methods, pressure test requirements, purging procedures, pressure drop testing, and safe commissioning practices.
- Perform pressure tests per CSA B149.1 requirements
- Apply approved leak testing methods
- Execute safe purging and commissioning procedures
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Pressure Test Procedures & Requirements
Why Pressure Testing Matters
Every new gas piping installation and every modification to existing piping must be pressure tested before being placed in service. The pressure test verifies that all joints are gas-tight and that the piping system has no leaks.
Test Procedure
Never Use Gas for Pressure Testing
Always use air or inert gas (nitrogen) for pressure testing. Never use the gas supply to pressurize piping for testing - a leak during testing with combustible gas creates an explosion hazard.
Pressure test all new and modified gas piping at 15 psig (typical) for a minimum of 10 minutes using air or nitrogen. Never use combustible gas for pressure testing. Any pressure drop indicates a leak that must be found and repaired.