When should a cylinder be condemned based on its condition?

A cylinder should be condemned when there is corrosion causing pitting because such damage compromises the structural integrity of the cylinder. Pitting is an indication of severe corrosion that can lead to leaks or failure under pressure, posing serious safety risks during operation. The integrity of pressurized vessels like fire extinguisher cylinders is critical, as any weakness can lead to catastrophic failure, especially when subjected to high pressures during discharge.

While the presence of a non-approved chemical agent in a cylinder is a concern, it may not necessarily indicate that the cylinder itself is physically compromised. Similarly, having a dent less than 1/10 of its greatest dimension might not meet the condemnation criteria unless further evaluations deem it unsafe. Lastly, a cylinder filled with water does not inherently indicate a problem that would necessitate condemnation, as this may be part of a maintenance procedure in certain contexts, rather than a sign of structural failure. Therefore, corrosion causing pitting is a definitive indicator for condemning a cylinder due to its direct impact on safety and functionality.