Page 157 - Improving Machinery Reliability

Machinery Reliability Audits and Reviews 129

12. Lube oil assembly drawing and list of connections
These are required for contractor’s (purchaser’s) connecting design.
13. Lube oil component drawings and data, including:
a. Pumps and drivers:
1. Certified dimensional outline drawing
2. Cross section and bill of materials
3. Mechanical seal drawing and bill of materials
4. Performance curves for centrifugal pumps
5. Priced spare parts list and recommendations
6. Instruction and operating manuals
7. Completed data forms for pumps and drivers
b. Coolers, filters, and reservoir:
1. Fabrication drawings
2. Maximum, minimum, and normal liquid levels in reservoir
3. Completed data form for cooler(s)
4. Priced spare parts list and recommendations
c. Instrumentation:
1. Controllers
2. Switches
3. Control valves
4. Gauges
Refer back to item 10. The same reviews are necessary here. Note here that
performance curves are required whenever pumps are involved, regardless of
whether they are of the centrifugal or positive-displacement (screw) type. Pos-
itive-displacement pumps undergo “slippage” which varies with the viscosity
of pumpage.
Instruction and operating manuals are intended for future incorporation in
owner’s “Mechanical Procedures Manual” and conventional plant operating
manuals.
14. Electrical and instrumentation schematics and bill of materials
The machinery review engineer should be given responsibility for obtaining
these data and forwarding them to his electricalhnstrument engineering coun-
terparts for review and comment.
15. Electrical and instrumentation arrangement drawing and list of connections
Same as item 14. At the completion of reviews by electrical/instrument
engineering personnel, the final arrangement will be implemented by the con-
tractor.
16. Polytropic head and polytropic efficiency versus ICFM curves for each section
or casing on multiple section or casing units in addition to composite curves at
80%, 90%, loo%, and 105% of rated speed
Note; Request information on probable location of surge line for various
molecular weight gases, as required.
These are important data for future uprate and general performance verifica-
tion studies, and can be used for purchaser’s check on vendor’s predicted per-
formance.