What is the recommended frequency for hydrostatic testing of air cylinders?

The recommended frequency for hydrostatic testing of air cylinders is generally set at 3 to 5 years. This interval is based on industry standards and regulations that ensure the safety and integrity of the cylinders used in firefighting and other applications where high-pressure air is stored. Hydrostatic testing evaluates the strength and integrity of the cylinder by filling it with water and pressurizing it, which can expose any weaknesses or potential leaks that may have developed over time.

Testing too infrequently may pose risks, as the cylinder could fail under pressure due to undetected faults. Testing more frequently than necessary could lead to unnecessary costs and may not provide additional safety benefits. Therefore, the 3 to 5-year timeframe strikes a balance between ensuring safety and maintaining economical operations.