Page 309 - Subyek Teknik Mesin - Forsthoffers Best Practice Handbook for Rotating Machinery by William E Forsthoffer

Be st Practice 5 .10 Steam Turbine Best Practices
B.P. 5.10. Supporting Material The success of the shop test depends on a good test plan that
is reviewed by the end user and contractor and modified as
requested well in advance of the test. Figure 5.10.3 presents
Testing phase these facts.

The testing phase is the last phase in terms of vendor and sub-
supplier design and manufacturing involvement in the project e
and so it is the last chance to ensure the optimum availability of
The agenda is issued for review two months prior to test
the finished product. It incorporates agreed VCM scope
Remember that all of the equipment addressed in this section Compressor performance test conditions are per ASME PTC–
is most likely custom designed, and no matter how much ac- 10 requirements
crued design and manufacturing experience is present, the A sample of test calculations and report format is included
possibility of some abnormality, hopefully minor, is high. Vendor concurs with all end user and contractor comments
prior to test
Therefore, it is imperative that this phase be carefully observed
and witnessed by the end user team. Figure 5.10.1 lists impor-
tant facts surrounding this phase of the project. Fig 5.10.3 Shop test agenda review – key facts

I actually began my career in rotating equipment on the test
floor. And I can still remember how we would see the witnesses
The shop test is an opportunity to: come in with an intent to completely participate in the entire
Con fi rm vendor proper design and manufacture test, only to leave for a long ‘test lunch’ an hour or so later. Why
Match field conditions did this occur? Usually because the concerned end user and
Witness assembly and disassembly using job special tools contractor witnesses did not have the opportunity to review the
Have plant personnel observe test, assembly, etc. and take
test set-up and the procedure prior to the test. As a result, I have
pictures for purposes of emergency fi eld maintenance
excellence always been a proponent of a pre-test meeting.
Is it always required? I think it is but the detail and timing of
Review the instruction book
Have the assigned vendor service engineer observe the the meeting depends on certain factors. These factors are noted
equipment he will install in Figure 5.10.4.
Review all vendor fi eld procedures

Fig 5.10.1 The shop test
If the equipment is prototype
If the equipment is complex
If a full load test is required
A shop test checklist is included at the end of this best If the test facility is new
practice that will be valuable in planning and executing the shop
test phase. Yes e there certainly are many opportunities to
ensure equipment reliability during shop test, but there are also Fig 5.10.4 When is a pre-test meeting required?
a lot of potential lost opportunities if they are not justified to the
project team early, during the pre-FEED phase, of the project. If it is decided to conduct a pre-test meeting, the key facts are
The potential lost shop test phase opportunities are noted in noted in Figure 5.10.5.
Figure 5.10.2.

Conduct the meeting prior to the test day
Send the agenda to the vendor well in advance
The following opportunities will be lost if they are not justified at A typical agenda outline:
project inception: Confirm test agenda requirements
Possible full load test Confirm all test parameter acceptance limits
Unproven component tests Confirm instrument calibration
Attendance at test by plant personnel Review test set up or concept drawing
Use of special tools Review data reduction methods
Vendor permission for pictures Confirm all test program agreements
Agreement that assigned vendor fi eld service specialists will be
present for tests
Agreement that the instruction book is reviewed Fig 5.10.5 Pre-test meeting e key facts
Agreement for formal fi eld construction meeting to clearly
de fi ne all vendor procedures from receipt of equipment on site
to initial run in of equipment
Figures 5.10.6 to 5.10.8 define recommended test activity for
the mechanical, auxiliary equipment and performance shop
Fig 5.10.2 Potential lost test opportunities tests respectively.

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