Page 167 - Improving Machinery Reliability

Machinery Reliability Audits and Reviews 139

d. Thrust bearing
e. Seals
f. Thrust collar
g. Wheel reblading procedures
Section 4-Performance curves:
a. Steam flow versus horsepower
b. Steam flow versus first-stage pressure
c. Steam flow versus speed and efficiency
d. Steam flow versus thrust-bearing load
e. Extraction curves
f. Steam condition correction factors (prefer nomograph)

Section 5-Vibration data:
a. Vibration analysis data
b. Lateral critical speed analysis
Section 6--”As-built” data:
a. “As-built” API data sheets
b. “As-built’’ dimensions and/or data (refer to item 34)
c. Hydrostatic test logs
d. Mechanical run test logs
e. Rotor balance logs
f. Rotor mechanical and electrical run-out log
Section 7-Drawing and data requirements:
a. Certified dimensional outline drawing and list of connections
b. Cross-sectional drawing and bill of materials
c. Rotor drawing and bill of materials
d. Thrust-bearing assembly drawing and bill of materials
e. Journal-bearing assembly drawing and bill of materials
f. Seal component drawing and bill of materials
g. Lube oil schematic and bill of materials
h. Lube oil arrangement drawing and list of connections
i. Lube oil component drawings and data
j. Electrical and instrumentation schematics and bill of materials
k. Electrical and instrumentation arrangement drawing and list of connections
1. Control and trip system drawings and data
Note: Items 11, 12, 13, and 35, Section 7, g through i inclusive, required
only for turbine manufacturer’s scope of supply

Evaluating Major Reciprocating Compressors

Occasionally, reliability reviews extend into the field of reciprocating compres-
sors. Their inherent efficiency and ability to achieve high compression ratios have led
to the design of reciprocating compressors absorbing in excess of 20,000 HP
(-15,000 kw) and discharge pressures in excess of 50,000 psi (3,447 bar). Very often,
compressor nnanufacturers are asked to propose larger and larger machines. This