How should standpipes be tested for integrity?

Standpipes should be tested for integrity through hydraulic testing, which is crucial for ensuring that there are no leaks or weaknesses in the system. This method involves filling the standpipe with water and pressurizing it to a specified level, typically higher than the normal operating pressure. By maintaining this pressure for a designated period, any weaknesses or leaks in the piping can be identified through observations of pressure drops or visible leaks.

Hydraulic testing is effective because it simulates the conditions under which the standpipe will operate during an emergency. This testing helps confirm the structural integrity of the standpipe and ensures that it will perform as intended when needed.

Other methods such as visual inspections or pressure testing with air may not adequately guarantee the standpipe’s readiness for service. Visual inspections can miss hidden flaws, while air pressure testing might not detect water leaks effectively, making hydraulic testing the most comprehensive method for verifying integrity.