In most areas and in industrial settings hydraulic accumulators must undergo periodic recertification due to the fact that they're pressure vessels, which are regulated in the same manner as receivers, boilers, and other storage-energy equipment. Recertification is usually an inspection of the visual as well as a non-destructive or hydrostatic test as well as a verification of the gas precharge generally on a timetable that is set in national codes for pressure vessels (such as ASME Section VIII, PED in Europe, as well as local safety rules) as well as by the manufacturer of the accumulator generally every 1-10 years, depending on the vessel's classification or service intensity, as well as the local laws.
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