WET GAS COMPRESSOR START UP

No. Action Action By Notes1 Ensure Mechanical, Electrical & Instrumentation Dpt. Clearance. FE

2 Ensure L.O. quality & adequate level in Lube Oil tank (LT 1804/LG-1801).

FO/PE

3 Lube oil temperature in the reservoir maintained at 40oC (TI-1822)

FO/PE

4 Maintain reservoir pressure at 50-100mmWC (PG-1844) through nitrogen PCV-1803.

FO

5 Check that the isolating valves of the oil pumps are open. FO6 Ensure that by-pass valve (LO-14) is closed for the pressure

control valve PCV-1801 and (LO-09 and LO-11) are open.FO/PE

7 Ensure that bypass valve LO-26 for PCV-1802 is closed and isolation valve LO-24 & LO-28 is open.

FO

8 Check that all drain valves of coolers, filters, level indicators and pipes are closed (Lube oil coolers).

FO

9 Check that the water inlet and outlet valves of oil cooler are closed (Lube oil coolers).

FO

10 Check all instrument are in line. FO11 Start permissive (IZ-34, 35 for lube oil pump) are taken from PT-

1884 Ensure that nitrogen supply to separation (barrier) seal is on before lube oil pump.

FO

12 Start the main lube oil pump according to vendor instruction. FO13 Open the bypass valves of oil cooler and filters. FO14 Open the vent valves of oil cooler and filters in service .bleed off

the air and close the valves again.FO

15 Cracks open the vents valves of oil cooler and oil filters not in service and close it again as soon as they are full.

FO

16 Check the oil pressure to the various points as follows:-a. Lube Oil Header: 2.0 to 2.5 Kg/cm2

b. Lube Oil pressure to thrust bearings: 0.3 to 1.3 Kg/cm2

c. Lube Oil pressure to radial bearings: 0.9 to 1.3 Kg/cm2

FO/PE

17 Check the normal flow of oil coming out from radial and thrust bearing by the flow sight glasses devices. Check the L.O pressure drop across the filters.

FO

18 Keep the stand-by oil pump driver ready to start on auto. FO19 Stop the main pump driver and check the stand-by pump

automatic start-up.FO

20 Then stop manually the stand-by pump and check the pressure point at which the trip switch (PALL 1835 with a 2-out-of-3 voting) installed in the lube oil header operates.

3 Ensure C.W. circulation and check healthiness of C.W. header FO

pressure.64 Start L.O. auxiliary pump in manual mode and check healthiness

of L.O. header pressure (PT 1834).FO

5 If the compressor is handed over by the M/M after doing M/M job, then do purging of compressor by N2, 2-3 times. Ensure no leakage with N2 at pressure 4.5-5.0 kg/cm2 and then isolate N2 line.

FO

6 Ensure N2 supply to seal gas system. FO7 Do compressor barring to ensure shaft freeness and after that

barring device must be disengaged from the compressor shaft.FO

8 Ensure first stage antis urge and 2nd stage anti surge valves full open.

FO/PE

9 Open fist stage and 2nd stage suction valves and discharge valve full open.

FO

10 Drain suction KOD. Ensure CBD isolation. FO11 Ensure Instrument air supply to antis urge, Level & control

valves.FO

12 Open stuffing box to vent to flare. FO13 Compressor ready to start from motor purge control unit and

VFD available. Check all the other permissive before start the compressor.

FO

14 Take clearance from panel officer/Shift in charge. FO/PE15 Press the trip reset from field (trip reset HS 1885) is available in

both LCP and HWC).FO

16 Push the compressor motor start button. FO17 Ensure no abnormality (vibration, sound, and leaks). FO18 Stop L.O. auxiliary pump after ensuring main oil pump pressure

& keep LOP in auto mode.FO