Equipment Classification and Risk Assessment
Based on the degree of impact on production and safety, equipment is divided into three categories, with differentiated management priorities allocated:
- Category A: Critical Equipment (e.g., reactors, main process compressors): Failures will directly lead to shutdowns and safety accidents, requiring precise and meticulous cycle management, with priority given to monitoring resources;
- Category B: Important Equipment: Failures affect localized production; standard fixed-cycle maintenance is sufficient;
- Category C: General Equipment: Cycles can be appropriately extended; repairs after failure will not affect overall production.
Collect Basic Reference Data
For each piece of equipment, collect three types of baseline cycle information:
- Equipment Manufacturer's Standard Recommendations: Maintenance items and cycles specified in the instruction manual (e.g., changing lubricating oil every 500 hours, annual calibration, etc.), these are baseline values under standard operating conditions;
- Regulatory and Industry Requirements: Special equipment such as pressure vessels and lifting equipment must meet national mandatory inspection cycle requirements; metering equipment needs to meet third-party calibration requirements;
- Historical Failure Data: Analyze past maintenance records of the equipment to identify high-incidence time points for adjusting cycles.
Adjust the Baseline Maintenance Cycle Based on Operating Conditions
The baseline maintenance cycle provided by the manufacturer is based on standard operating conditions and must be adjusted according to actual usage:
- If the equipment is used frequently or operates in high-temperature/high-pressure/corrosive environments, the maintenance cycle should be shortened appropriately.
- If the equipment is idle at low frequency and operates under mild conditions, the maintenance cycle can be extended appropriately. Older equipment ages and wears out quickly, requiring shorter cycles; new equipment can follow the baseline.
- If the goal is to keep the failure rate below 5% within the maintenance cycle, the cycle should be set before the point where the failure rate significantly increases.