What is the characteristic of cartridge-operated fire extinguishers regarding hydrostatic testing?

Cartridge-operated fire extinguishers are designed with specific operational and maintenance guidelines that distinguish them from other types of extinguishers. One of the notable characteristics is that they do not require hydrostatic testing like other extinguishers. Hydrostatic testing is typically mandated for most fire extinguishers to ensure their structural integrity and safety under pressure. However, the design of cartridge-operated extinguishers allows for a different approach. Instead of hydrostatic testing, these extinguishers rely on the replacement of cartridges and regular inspections to maintain readiness and functionality. This distinction simplifies maintenance requirements and is tailored to the operational nature of cartridge-operated units, making them easier to manage in various settings.