Page 558 - Subyek Teknik Mesin - Forsthoffers Best Practice Handbook for Rotating Machinery by William E Forsthoffer

Best Practice 1 0.3
The Post-Shipment Phase: Installation, Pre-Commissioning, Commissioning and Start-up Best Practices Best Practice 1 0.4

Best
Best Practice 10.3Practice 10.3
Ensure that site visits by vendor service representatives Following all the guidelines noted above will optimize visit effec-
are effective, by taking appropriate action at the time of the tiveness and establish a good working relationship with the vendor
vendor assistance request. representative.
Steps to ensure effective site visits are as follows:
Send detailed problem statements for each machinery item to be Lessons Learned
covered Vendor representative visits, particularly in remote areas,
Send detailed workscope for each machinery item to enable vendor are not totally effective unless detailed site problem in-
representatives to be totally prepared formation and requirements are sent well in advance.
Require vendors to submit two nominees (main and alternate) along I have witnessed and been told of many ineffective vendor repre-
with contact reference phone numbers for last two field visits made sentative visits, and I have discovered that none of the noted best
by the nominees practices above had been followed.
State in vendor visit document that weekly visit reports are required
while on site and a final visit report is to be submitted prior to leaving Benchmarks
site
This best practice has been used since 1984 during a large petro-
Include any specific training requirements for the representative to
chemical complex construction project and has since that time con-
present during the visit sistently produced effective vendor representative visits.

Best
Best Practice 10.4Practice 10.4
Follow these critical machinery foundation preparation vendor procedures will reduce the machinery train’s life
best practices to ensure optimum machinery life cycle cycle reliability.
reliability: I have been involved with project delays of over a month that have
Review the contractor’s machinery foundation procedure prior to resulted from not having a foundation preparation procedure for critical
the start of any equipment installation to confirm: compressor trains. In this case, the subject compressor foundation
Proper foundation preparation procedures bolt location was not coordinated with the location of the reinforcing
The contractor’s procedure, types of bolts and bolt arrangement, bars, which required complete excavation of the foundation to achieve
meet or exceed the equipment vendor’s requirements and bolt the proper location of the foundation bolts.
arrangements
The proper location of all foundation bolts to prevent baseplate bolt Benchmarks
hole machining This best practice has been used since the issue noted above was
Proper preparation of foundation bolts (stress relieving, etc.) experienced (1988), and requires that a critical machinery foundation
Proper leveling of machinery procedure be prepared and reviewed by all project critical machinery
vendors prior to the project construction phase. This best practice has
Having a critical machinery foundation preparation procedure that
resulted in critical machinery foundations that have not required rework
has been reviewed and accepted by the construction contractor prior
and have produced critical machinery trains of the highest reliability
to field construction will ensure a critical machinery foundation of the
(99.7%þ).
highest reliability, and optimize the overall machine train reliability.
Lessons Learned
Installing critical machinery without a foundation pro-
cedure that is based on proven installation experience and

B.P. 10.4. Supporting Material General considerations

After the proper civil work is done, and the foundation is designed
Foundations in accordance with specifications, there are certain general con-
siderations required. These are shown in Figure 10.4.1.
The installation of properly designed and constructed founda- Foundations must be rough enough to allow grout to adhere.
tions plays an important part in the long term availability of The elevation of the top surface should allow at least one inch of
equipment. This section will cover the major aspects of sound grout under the base plates or sole plates. When machinery is
foundations. mounted directly on the foundation, sole plates must be

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