Facilitators – Les Osborne, Curtiss Wright & Jeff Szcinski, ProGuard-Mahle Ind. Filtration
FLANGE LOC/ FAILURE
Multiple LOC with RF flanges (charge lines)
- All spiral wound gaskets
- NO ‘thermal recovery’
- Existing torqueing protocol
- Drum-specific failures
Potential Causes
- Vibration
- Torsional stress
- Gasket type/design
- Bolting ‘relaxing’ (torque loss)
- Over-torqueing &/ or ‘flange roll’
Delta Valves – Retorque
- Excess ‘torqueing’ detrimental
- ‘tensioning’ option
- Bolting MOC influences
JET PUMP WEAR (THRUST)
Existing procedures to minimize jet water particulate (150 ppm spec)
- Tank blowdown
- Clear well cleaning
– Erosion confirmed
– Maze/well sparging
– Jet pump monitoring
- Discharge flow & pressure
- Drill times
- Suction screen maintenance
- Vibrations
GENERAL PM/ VALVE RELIABILITY
‘Dry’ steam critical – purges
- Avoid dead heads
- Stm trap maintance lacking
Steam pressure critical
- Regulation (20-25 psig increase line pressure)
– Temp gun leakage detection
– Pitfalls of SPR HT Steam
– Consider AMP-monitoring of MOVs
– Don’t underestimate effect of GREASE
MAZE/WELL PUMPSHEATER MAINTENANCE ISSUES
– Dampers
– Burners
– Firebox air leakage
– Explosion door PM
– Frequency of trip-testing
– Pigging management/ awareness
PROCESS HOSE PM
PM or replace plan? (frequency = TA or 5 yr)
- If existing, type ‘visual’
Though infrequent, hose failures have caused outages
Consider post-mortem inspections
DRUM SKIRT/ HANGER PM
Drum anchoring
- ?Consider adding to PM
- Support grout/concrete integrity
- Alternative washer/shims
Spring Cans/Hangers
- Consider ANNUAL ‘mark’ program
- Consider 5 yr tensioning program
- Remember hot vs cold conditions
CUTTING EQUIPMENT RELIABILITY
– Cutting deck walk-thrus
– Derrick hardware sitings!
ELBOW STEAM
– Specifically, on dual inlet
