Maintenance & Reliability

[Anonymous]

~ Valve
 
    – 50/50 preference ball vs. plug
    – Good pm program increases life
 
~ Decoking Valves
 
    – Check Water Quality
    – Rebuild Options
 
~ Drill water Piping/Bypass valves
 
    – Erosion/Corrosion Issues
    – Bypass valve reliability
    – Instrument air quality
 
~ Drum Cracking
 
    – Quench procedure
    – Good operation and design are key
    – Plan for inspection and repair
    – Effected by cycle time
    – Reduced quench times
    – Safety issues (Fires, etc.)
 
~ Hot Drums
 
    – Quenching time/rates
    – Blowouts – Causes
    – Caution with using closed type drill guides
 
~ Drill stem
 
    – Put odd section on the top
    – Life limited by cave ins
 
~ Drill Stem Issues
 
    – Failure Mechanisms
          – Corrosion
          – Overtorquing
    – Outside Contractors
          – Trained
          – Right Equipment
          – Increased Safety
 
~ Heater Tube
 
    – Failure mechanisms (many)
    – Becht has method for checking carburization of the tube
 
~ Maze Issues
 
    – Water quality
    – Fines management
    – Pump reliability
    – Type of pump – submerged vs. vertical
 
~ Maze Pumps
 
    – Submersible vs. vertical
    – Water handling needs to be properly designed & operated
 
~ Furnace Changed Pumps
 
    – Need a good warm up procedure
    – Be careful cleaning strainers
 
~ Coke Handling
 
    – Want to avoid cutting rates
    – FELS vs Bridge Crane
    – Cranes need proper design
 
~ Elevators
 
    – Freight vs. Passenger
    – One facility has no issues
 
~ PM of emergency equipment
 
    – Fall arrestors
    – EBV values

[Author]

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