What pressure capability should a hydrostatic test pump have in relation to the manufacturer recommended pressure?

The correct pressure capability for a hydrostatic test pump is set at 150% of the manufacturer-recommended pressure. This standard is based on safety and assurance that the fire extinguisher can withstand conditions beyond normal operational limits. Implementing a hydrostatic test at this higher pressure ensures that any potential weak points in the extinguisher are identified, enhancing the overall safety of the unit.

Testing at 150% serves as a precaution, accommodating possible variations in manufacturing and ensuring that the extinguisher will not fail under pressure during actual use. This rigorous testing helps to maintain compliance with industry standards and assures users that the equipment will perform effectively in an emergency.

While pressures lower than this may offer some level of testing, they do not adequately challenge the integrity of the extinguisher and may lead to undetected failures. Thus, choosing 150% is both a preventive measure and a requirement for thorough safety evaluations in fire safety protocols.