Page 294 - Improving Machinery Reliability

Life Cycle Cost Studies 265

Table 5-3
Life Spans of Selected Machinery Components and Equipment

10-3 io-* 10-1 100 101 102 103
I
Static Equipment
Boilers. condensers
Pressure vessels
Filters, strainers
Check valves
Relief valves

Service Liquids
Coolants
Lubricoolants. screw comp.
Lube oils, mineral
Greases

10-3 10-2 IO-* 100 101 1 02 103
Failure Rate (failures per 10' hours)
L
I I ,
Corresponding mean-lime-between-failure. months. years 99Y 16Y 3Y 1Y 1M

Table 5-4
Component Life Expectancies Further Subdivided to Reflect the Experience
of Your Facility (Example)
-
H
COUPLINGS, Gear

Couplings, H.S. Gear, H
OIL LUBEO, CROWNED

Couplings, L.S., NON-CROWNED H

Failure Rate (failures per lo6 hours)
I I I I I
I I
Corresponding mean-time-between-failure. month, year 99Y 16Y 3Y 1Y 1M