Page 557 - Subyek Teknik Mesin - Forsthoffers Best Practice Handbook for Rotating Machinery by William E Forsthoffer

Be st Practice 1 0.2 The Post-Shipment Phase: Installation, Pre-Commissioning, Commissioning and Start-up Best Practices
shipped with the unit. Almost every such review has un- all rotor preservation will be maintained from initial receipt date
covered incorrect information and/or general information on site. There have been many cases where the rotor containers
that is not specific to the particular project that would have have never been inspected prior to the intended use date and
resulted in confusion during disassembly/assembly of the could not be used and had to be returned to the vendor for
equipment, which in turn may have lead to possible equip- rework.
ment reliability problems.
On site storage
Spare parts
Prior to the arrival of any equipment on site the contractor
The end user must require the contractor to be responsible for should review the manufacturer’s requirements and provide
the proper storage of spare parts on site and most importantly, extended on site storage facilities that meet or exceed those
the receipt of all required start-up spares, operating spares and requirements. In addition, the contractor shall order and have
capital spare parts well in advance of the start of construction available the required preservation compounds.
activity. Often, spare parts are required prior to the initial op- When selecting the preservative compounds, special care
eration of equipment, since components are broken during should be given to the selection of compounds for the specific
shipment. site environment and should be based on local experience. In
It has been our experience that many of the spare rotors for humid, seacoast and offshore environments, special care should
major, unspared equipment are not properly inspected and be given to ensure the preservative compounds can resist high
maintained upon receipt from the vendor. A specific rotor moisture/salt environments. In addition, components should be
container inspection procedure should be written by the con- checked frequently to confirm that the compounds are pro-
tractor, and approved by the vendor and end user, to ensure that viding the required protection.

Best
Best Practice 10.2Practice 10.2
Ensure that the all preservation materials are on site and Involvement with plant construction activities has revealed the fol-
that the agreed site machinery preservation program is lowing issues with plant preservation programs:
fully implemented. Insufficient preservation material ordered thus extending the actual
An important initial site activity is to review the previously approved intervals between preservation activity
machinery preservation procedure (see B.P. 10.1) with the construction False reporting of preservation checks (marking off checks without
contractor to confirm: performing them)
All preservation materials are on site Insufficient manpower for the preservation program leading to
Preservation materials are correct for the site environment extended or missed preservation activities
Schedule of preservation activities and checks for each machinery
item Benchmarks
Method of record keeping to ensure the activity is performed on
This best practice has been used since the mid-1980s in all pro-
time
jects to ensure sufficient machinery preservation during construc-
Personnel assigned to the preservation activity are sufficient in
tion and on time plant start-ups. Implementation of these best
number
practices has resulted in high bearing and seal MTBFs (in excess of
Day and time for monthly preservation status meetings
100 months).
Lessons Learned
Delayed machinery start-ups are often caused by insuf-
ficient preservation programs

B.P. 10.2. Supporting Material
See B.P: 10.1 for supporting material.

528