Tips for preservation of rotating equipment installed but idling in field for longer duration

Long Term Perspective : ( Idle  from 6 months  to 2 years and above)

 PUMPS (CENTRIFUGAL, ROTARY & RECIPROCATING )

1. Pump casing should be flushed & drained.
2. If service is acidic or alkali, the same should be neutralized.
3. All cooling jackets should be flushed by fresh water followed by air drying.
4. Pump casing should be filled with mineral oil containing 5 percent rust preventive 
   concentrate.
5. Cooling water jackets, bearing housing and stuffing box should be plugged; low point drain
    valve should be cracked open slightly.
6. Approved preservative coating should be applied on parts which protrude through bearing or
   stuffing box housings like shaft end and cover with tape.
7. All exposed machined surfaces and coupling parts except elastomers should be coated with
    preservative.
8. Bearing housing should be completely filled with mineral oil containing 5 percent rust
   preventive concentrate.
9. Pump suction and discharge valves should be kept closed.
10.The equipment should be given few hand rotations (4 to 6) every 6 months (or during P.M).

 LARGE FANS
1. Approved preservative coating should be applied on coupling and all external machined
   surfaces.
2. Rust preventive spray should be applied on fan wheel.
3. Casing low point drain valve should be crack opened. The equipment should be given few
hand rotations once in 6 Months (or during P.M).
 GEARBOXES
1. Gearbox and piping should be completely filled with oil containing 5 percent rust preventive
concentrate. Some space should be left for thermal expansion.
2. All vents should be plugged.
3. The equipment should be given few hand rotations every 6 Months (or during P.M).

RECIPROCATING COMPRESSORS
1. Compressor casing should be made free of hydrocarbons and purged.
2. Compressor suction and discharge valves should be removed and separately preserved in 
    store .Valve ports should be closed with valve covers after spraying with anti rust 
    preservative inside the cylinders.
3.Start auxilliary lube oil pump and give barring to compressor for 4 to 6 rotation periodically 
    every 4 months
4. All exposed machined parts should be coated with approved preservative.
5. After flushing & drying of cooling jacket, oil can be filled.
6. If the equipment is not in operation for more than one year, all soft packings, elastomers
   should be inspected & replaced (if required).

CENTRIFUGAL PROCESS COMPRESSORS
1. Compressor casing should be made free of hydrocarbons and purged.
2. Machine internals should be flushed with solvent to remove heavy polymers.
3. Casing should be pressurized with nitrogen or bone dry air (25 mm water column gauge just
     positive pressure above atm.)
4. After mixing 5 percent rust preventive concentrate to existing lube and seal oil, it should be
    circulated through the entire system for one hour through auxilliary oil pump and should be
   given hand rotation few turns periodically every 4 months.
5. Upon the above exercise, oil return header should be closed. Shaft openings should be
   sealed with silicone rubber caulking and tape.
6. Oil console should be filled with mineral oil containing 5 percent rust preventive concentrate.
7. Filling should be done when compressor is at ambient temperature. All heat tracers should
   be turned off.
8. All exposed machined parts; including couplings (except elastomer) should be coated with
    approved preservative.