Page 432 - Subyek Teknik Mesin - Forsthoffers Best Practice Handbook for Rotating Machinery by William E Forsthoffer

Lube, Seal and Control Oil System Best Practices Best Practice 7 .16
components as they will operate in the field. In order to ensure testing both together. Additional costs of such a test should be
a valid factory test, a test agenda should be prepared approxi- evaluated against the potential reduction of reliability and loss of
mately two months before test date and reviewed by the operation time in the field if any malfunctions exist that were
equipment purchaser. A typical test agenda outline is included not determined by test of the console alone.
at the end of this section. In addition, a typical auxiliary system
test agenda is included courtesy of G.J. Oliver, Inc. The test Functional lube/seal system test
agenda should endeavor to confirm the functional operation of
every component in the system. Specific areas of concern are procedure outline
discussed below.
Objective: To confirm proper functional operation of the entire
system prior to equipment start-up
Flushing
Procedure Detail each test requirement. Specifically note
Component system flushing is required as an inspection point format: required functions/set points of each component.
and should be accepted prior to the initiation of the test. Record actual functions/set points and all
Additionally, all test agendas should be structured such that modifications made.
Note: All testing to be performed without the unit in
a limit for each item to be tested is specifically defined. The operation.
flushing acceptance criteria must be mutually agreed upon
and be adhered to during the review of flushing the
operation. Refer to a typical field flushing procedure in B.P.
7.18. I. Preparation
A. Confirm proper oil type and reservoir level.
Confirm arrangement details B. Confirm system flush is approved and all flushing screens are
Prior to the commencement of the test, make sure that the removed.
arrangement of all components, controls and instruments agrees C. Confirm all system utilities are operational (air, water,
with the design requirements. Any discrepancies should be steam, electrical).
corrected prior to functional test. D. Any required temporary nitrogen supplies should be
Confirm proper test fluid and capacity are present to prior to connected.
initiation of the test. E. All instrumentation must be calibrated and control valves
properly set.
Temporary test setup F. Entire system must be properly vented.
If it is necessary to import utilities or switches for the test that II. Test procedure
are not normally present, as in the case of steam turbine steam
generator and control switches, these items must be confirmed A. Oil reservoir
prior to test initiation. In addition, a means of confirming proper 1. Confirm proper heater operation.
flow rates, temperature and pressure during the test must be 2. Check reservoir level switch and any other components
provided. Supply lines to the unit must be provided with (TIs, vent, blowers, etc.).
properly size orifices to duplicate unit flow requirements. B. Main pump unit
1. Acceptable pump and driver vibration
Functional testing 2. Absence of cavitation
3. Pump and driver acceptable bearing temperature
Having confirmed proper test setup, calibration of all in-
strumentation, proper fluid and test instrumentation, the 4. Driver governor and safety checks (uncoupled) if driver is
a steam turbine
functional test is now ready to be performed. As a minimum the
following tests should be performed on any auxiliary system C. Auxiliary lube pump unit: same procedure as item B
above.
console:
D. Relief valve set point and non-chatter check.
- Relief valve test (if supplied) E. Operate main pump unit and confirm all pressures,
- Transfer valve test differential pressures, temperatures and flows are as
- Auto start test of auxiliary pump with the following specified on the system schematic and/or bill of material.
conditions: F. Confirm proper accumulator pre-charge (if applicable).
- Main pump tripped G. Confirm proper set point annunciation and/or action of all
- Two pump operation (main pump in operation, standby pressure, differential pressure and temperature switches.
pump started) H. Switch transfer valves from bank ‘A’ to bank ‘B’ and confirm
pressure fluctuation does not actuate any switches.
During all functional testing, any system pulsations or pres- I. Trip main pump and confirm auxiliary pump starts without
sure drops above specified values are reason for non-acceptance actuation of any trip valves or valve instability.
of test. All components not meeting requirements must be
Note: Pressure spike should be a minimum of 30% above any
corrected and units must be completely retested. trip settings
The value of testing the auxiliary console with the unit should
be seriously considered. Since the console and the unit piping J. Repeat Step I above but slowly reduce main pump speed (if
from the specific auxiliary system, there is a significant benefitto steam turbine) and confirm proper operation.

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