Why have a plan?
- Safety of operation, general
- Safe use of high pressure filling equipment, in particular
- Customer service
- Uptime and efficient operation
- Protect capital investment
What does the plan do?
- Manages activity
- Monitors station performance
- Provides emergency fueling support
- Improves equipment reliability
- Delivers clean fuel to vehicles
When do you perform maintenance?
How do you do maintenance?
- Documented on operation and maintenance forms.
- Detailed – date, time, weather conditions, temperature, list of items to be checked, recorded, drained, or added.
Commonly overlooked items
- Removal of hazardous materials – dryer desiccant, liquid from dryer regeneration, filter cartridges, compressor lubricants. OSHA fines.
- Improper compressor readings (suction, interstage, discharge) pressures & temperatures
- Not draining coalescing filters and ASME cylinders: compare oil added to compressor to oil drained from filters and cylinders. The difference is oil carryover into vehicles.
- Not re-certifying safety relief valves at dryer, compressor, cylinders, and dispenser to NFPA 52 (3 yrs; CA: 1 yr)
- Testing the methane detector inside the compressor enclosure
See also: National Fire Protection Association (NFPA) http://www.nfpa.org/index.asp
NGVi’s Oil Carryover Technical Paper: The Achilles Heel of Natural Gas Vehicles: The Symptoms, Diagnosis and Prevention of Oil Carryover