Details

  • Contact

  • Telephone Number

  • Date of Service

  • Turboexpander Frame Size(s)

  • Cartridge #1 Serial Number

  • Cartridge #2 Serial Number

  • Spare Cartridge #1 Serial Number

  • Spare Cartridge #2 Serial Number

  • Comments / Notes

1. Seal Gas System

  • 1. Blow down piping & check installation of valving.

  • 2. Gas source at design pressure and temperature / customer connections installed.

  • 3. Differential pressure switch / transmitter installed correctly and set point checked.

  • 4. Low pressure switch / transmitter installed correctly and set point checked.

  • 5. Electrical connections correct and checked.

  • 6. Seal gas filter assembly clean, filter element new.

  • 7. Check that wing nut at bottom of filter is tight.

  • 8. Supply regulator and backpressure regulator checked and set correctly.

  • 9. Check Flow Meter for correct operation.

2. Lube System

  • 1. Charge accumulator to correct gas pressure shown on P&ID. (25 psig)

  • 2. Verify that accumulator isolation valve is open and bleed valve is closed.

  • 3. Check that correct lube oil is available and used per manual instructions.

  • 4. Rotation check on single or dual pumps. (Motor bump test.)

  • 5. Verify low lube oil pressure alarm set point and start of stand by pump.

  • 6. Verify low lube oil pressure shut down set point.

  • 7. Verify oil reservoir heater operation.

  • 8. Check that lube oil reservoir demister has the correct elements and relief valve.

  • 9. Check that mist eliminator drain line extends below the oil level near bottom of tank.

  • 10. Check that reservoir fill cap is correct for application (vented or non-vented).

  • 11. Check that mist eliminator is properly secured for outdoor application.

  • 12. Check lube oil filter assembly and clean prior to start of oil flush.

  • 13. Install flushing jumper around unit bearing case.

  • 14. Check water supply to shell and tube oil cooler including water inlet temperature.

  • 15. Reservoir filled to correct level. (Verify oil fill pump is clean prior to use.)

  • 16. Verify reservoir level gauge functions properly and is not leaking.

  • 17. Verify operation of reservoir liquid level switch.

  • 18. Circulate oil for a minimum of 6 hours and check screen or elements for cleanliness.

  • 19. Verify safety relief valve operation.

  • 20. TI’s and PI’s on lube system functioning correctly.

  • 21. Verify there are no oil leaks from piping, tubing, or components.

  • 22. Verify correct oil pressure supply to the machine(s) & check flow meter for correct operation.

  • 23. Accumulator run-down. Time in seconds.

  • 24. Insure accumulator cap threads are coated with anti-seize or other rust inhibitor.

3. Main Unit Piping & Valves

  • 1. Expander Inlet line blown down and clean.

  • 2. Suction screen correctly installed in expander inlet line (with sock installed when supplied).

  • 3. Inspect casing drain for expander and compressor casing. Drain valves are required.

  • 4. Verify fit of inlet pipe to expander inlet flange.

  • 5. Verify smooth action of quick close valve. Time to close in seconds.

  • 6. Verify fit of discharge line to expander discharge flange.

  • 7. Inspect expander inlet and discharge pipe supports.

  • 8. Compressor inlet line blown down and clean.

  • 9. Verify fit of compressor inlet line to compressor inlet flange.

  • 10. Suction screen correctly installed in compressor inlet line.

  • 11. Verify fit of compressor discharge pipe to compressor discharge flange.

  • 12. Inspect compressor inlet and discharge pipe supports.

  • 13. All check valves installed in correct direction.

  • 14. Compressor discharge check valve at correct location.

  • 15. Verify recycle valve (anti-surge) operation. Time to open in seconds.

  • 16. Verify location of bypass is downstream of aftercooler.

  • 17. PI’s, TI’s, and transmitters calibrated.

  • 18. Verify that quick closing inlet trip valve(s) fully close and seal for zero leakage.

  • 19. Verify 5 Diameters of straight pipe at compressor inlet and expander discharge as shown on P&ID.

  • 20. Trace all tubing lines to correct locations as shown on the P&ID.

  • 21. When screen socks are installed, cut felt end excess so that four one inch wide tabs extend between the screen flange and the gasket.

4. Main Unit

  • 1. Verify actuator stroke per machine assembly drawing and internal nozzle stops.

  • 2. Verify limit switch operation (if applicable).

  • 3. With inlet spool removed verify smooth rotation of rotor.

  • 4. Verify shaft and bearing thrust float.

  • 5. Verify compressor wheel to shroud axial and radial clearances.

  • 6. Check Gap voltage for all vibration probes.

  • 7. Set and verify speed probe distance from shaft.

  • 8. Speed indicator reading(s) verified with signal generator input.

  • 9. High speed alarm and trip set points verified.

  • 10. Verify continuity on RTD leads.

  • 11. Verify integrity of connector to cable. Repair if required.

  • 12. Verify that RTD’s read out correctly at ambient temperature.

  • 13. Shipping bolts in compressor casing feet loosened.

  • 14. Verify all set points per P&ID.

  • 15. Fill pressure gauges with glycerin or halocarbon oil.

  • 16. Verify that all contractual spares are at site and properly stored.

  • 17. Document with digital photographs.

  • 18. Confirm that customer has machine do-not-dwell zones in DCS.

  • 19. Verify that tachometer input settings agree with Electrical Schematic and P&ID.

  • 20. Inspect Control Panel enclosure for weather and water tightness. Check window gasket.

  • 21. Machine trip at full speed run-down time for rotor to stop (Determined by loss of vibration signal & speed):

  • Warm (in seconds)

  • Cold (in seconds)

  • 22. Verify all electrical connections are checked and terminal screws are tight.

  • 23. Check and verify the warm and cold expander location is correct on skid and correct cartridge installed.

  • 24. Ensure cartridge lifting points and jacking holes are plugged with anti-seize applied.

  • 25. Seal the centerline split in insulation panels and perimeter of cartridge insulator plate with silicon.

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