Page 388 - Subyek Teknik Mesin - Forsthoffers Best Practice Handbook for Rotating Machinery by William E Forsthoffer
P. 388
Lube, Seal and Control Oil System Best Practices Be st Practice 7.5
objectives, then, of this phase are to confirm the proper During all functional testing, any system pulsations or pres-
arrangement details and functional operation of the sure drops above specified values are reason for the non-
equipment. acceptance of the test. All components which do not meet re-
quirements must be corrected and units must be completely
Test agenda retested.
The value of testing the auxiliary console with the unit
To meet the objectives of this phase the equipment must be
should be seriously considered. Since the console and the unit
thoroughly tested prior to field installation. The test should piping form the specific auxiliary system, there is a significant
confirm the functional operation of all components as they will benefit to testing both together. The additional costs of such
operate in the field. In order to ensure a valid factory test, a test a test should be evaluated against the potential reduction of
agenda should be prepared approximately two months before reliability and loss of operation time in the field if any
the test date, and be reviewed by the equipment purchaser. malfunctions exist that were not determined by test of the
Specific areas of concern are:
console alone.
Testing the console without the unit assumes that a model of
Flushing the actual equivalent critical equipment orifices has been
Component system flushing is required as an inspection point properly installed during the test. There is no assurance that the
and should be accepted prior to the initiation of the test. Ad- actual manufacturer of the equipment has not incorporated
ditionally, all test agendas should always be structured such
changes in equivalent orifices sizes. This would result in differ-
that a limit for each item to be tested is specifically defined in ent flows to the unit and different console responses for various
the test agenda. The flushing acceptance criteria must be mu-
transient operational modes. Daily revenue should be consid-
tually agreed upon and be adhered to during the review of ered in evaluating the extra cost involved for a full console unit
flushing the operation. A typical field flushing procedure is test in a manufacturer’s works. If a full unit test is to be
given in B.P. 7.18.
performed, it is still recommended that the console be tested at
the point of manufacture prior to the unit test in the critical
Confirm arrangement details equipment vendors shop. This action will reveal console design
Prior to commencement of test, it should be confirmed that the problems prior to shipment to the vendor’s plant.
arrangement of all components, controls and instruments agree
with design requirements. Any discrepancies should be I. System requirements e see chart (previous page) for
corrected prior to functional test. input data
Confirm proper test fluid in sufficient capacity is present to
prior to the initiation of test.
1. Total pump flow ¼ ______ equipment
(Positive displacement pump) flow (l a )
Temporary test setup Total pump flow ¼ ______
If it is necessary to import utilities or switches for the test that (Centrifugal pump) ¼ ______ (total flow in l a )
are not normally present, as in the case of steam turbine steam 2. Bypass flow ¼ (1) e l a total flow
generator and control switches, these items must be con- (Positive displacement pump) ¼ ______e_____
firmed prior to test initiation. In addition, a means of ¼ ____________
confirming proper flow rates, temperature and pressure during 3. Total heat load (from la) ¼ ______ BTU/HR or kW
the test must be provided. Supply lines to the unit must be
4. Pump discharge pressure ______60 _____1000
provided with properly size orifices to duplicate unit flow
requirements. Viscosity (SSU) or centistokes ________ ________
A. Lube oil pressure ________ ________
(at equipment) ________ ________
B. Elevation DP ________ ________
Functional testing
C. Pipe DP ________ ________
Having confirmed proper test setup, calibration of all in- D. Valve DP ________ ________
strumentation, proper fluid and test instrumentation, the E. Cooler DP ________ ________
functional test is now ready to be performed. As a minimum the F. Filter (clean) DP ________ ________
following tests should be performed on any auxiliary system G. Miscellaneous DP ________ ________
Pressures in kPa or PSI
console: Pump discharge press
(Add A through G)
- Relief valve test (if supplied)
- Transfer valve test Note: If system is combined with seal and/or control oil, add highest
- Auto start test of auxiliary pump with the following value to determine pump discharge pressure.
conditions:
- Main pump tripped II. Component requirements
- Two pump operation (main pump in operation, standby Confirm sizing as stated below and check data sheet and specific
pump started) requirements for each component.
359