How often are the cylinders hydrotested to ensure their capability?

Cylinders used for storing compressed gases, including those for fire services, are required to undergo hydrostatic testing every five years to ensure their structural integrity and safety in operation. This testing involves filling the cylinder with water and subjecting it to high pressure, which checks for leaks and material strength. This five-year interval is critical to prevent failures that could result from corrosion, fatigue, or other factors that can compromise the cylinder's ability to safely contain gases under pressure. Hydrotesting is a regulatory requirement and is strictly enforced to ensure the safety of emergency responders and the general public. The establishment of this standard recognizes the need for regular assessments to maintain safety in high-risk environments like firefighting.