Efficient Plant February 2018 - 18

feature | reliability strategies

Don't
Ignore

Small
Failures

While a power plant's fractured oil plug seemed
like a small failure, the root cause suggested
larger, more costly incidents could follow.

Randall Noon, P.E.

THE FOLLOWING CASE study
involves a fractured oil plug in a power
plant. In itself, a fractured oil plug isn't
a significant failure in a large industrial
facility. However, even back-of-theenvelope analyses of seemingly small
failure incidents can reveal larger
patterns that should be addressed.

INITIAL FAILURE STORY
The oil plug shown in the above
photograph had been removed from
a 300-hp vertically mounted electric
motor. That motor drives a mixed-flow,
single-stage vertical pump in a power

plant. The pump feeds cooling water
from a river to various heat exchangers.
The plug is from the lower oil reservoir
that services the lower motor bearing.
An upper reservoir services the motor's
upper bearing.
The fracture was discovered when
the plug was removed to collect a
lubricant sample for periodic analysis. Leakage from this plug had been
occasionally reported in the past. Each
time a leak was noted, a mechanic was
dispatched to fix it.
No other information was supplied
at the time the photograph was pro-

Following maintenance recommendations for inexpensive components, such as the oil plug in
the inset (above), can prevent damage to much larger, more expensive equipment.

18

| EFFICIENTPLANTMAG.COM

FEBRUARY 2018


http://www.EFFICIENTPLANTMAG.COM

Table of Contents for the Digital Edition of Efficient Plant February 2018

Maximize CMMS, EAM Use
Tribology Program Fills Skills Gap
Caring For Bearings In Extreme Environments
Press-Brake Safeguarding Matters
Oil Systems Need To Breathe
SAP: Kicking Bad Habits
Advice For Automated Substations
Good BOMs Boost Maintenance Efficiency
Smarten Up About Rotor Analysis
Heed These Signs of Inefficiency
Implementations
IIoT
Efficiency Insight
Editorial
On The Floor
Solution Focus
Products
Showcase
Efficient Plant February 2018 - Cover1
Efficient Plant February 2018 - Cover2
Efficient Plant February 2018 - 1
Efficient Plant February 2018 - 2
Efficient Plant February 2018 - 3
Efficient Plant February 2018 - 4
Efficient Plant February 2018 - 5
Efficient Plant February 2018 - Editorial
Efficient Plant February 2018 - 7
Efficient Plant February 2018 - Implementations
Efficient Plant February 2018 - 9
Efficient Plant February 2018 - Maximize CMMS, EAM Use
Efficient Plant February 2018 - 11
Efficient Plant February 2018 - 12
Efficient Plant February 2018 - 13
Efficient Plant February 2018 - Tribology Program Fills Skills Gap
Efficient Plant February 2018 - 15
Efficient Plant February 2018 - 16
Efficient Plant February 2018 - 19
Efficient Plant February 2018 - 20
Efficient Plant February 2018 - Caring For Bearings In Extreme Environments
Efficient Plant February 2018 - 22
Efficient Plant February 2018 - 17
Efficient Plant February 2018 - 18
Efficient Plant February 2018 - 19
Efficient Plant February 2018 - 20
Efficient Plant February 2018 - Caring For Bearings In Extreme Environments
Efficient Plant February 2018 - 22
Efficient Plant February 2018 - 23
Efficient Plant February 2018 - Press-Brake Safeguarding Matters
Efficient Plant February 2018 - 25
Efficient Plant February 2018 - 26
Efficient Plant February 2018 - 27
Efficient Plant February 2018 - Oil Systems Need To Breathe
Efficient Plant February 2018 - 29
Efficient Plant February 2018 - 30
Efficient Plant February 2018 - SAP: Kicking Bad Habits
Efficient Plant February 2018 - Advice For Automated Substations
Efficient Plant February 2018 - Good BOMs Boost Maintenance Efficiency
Efficient Plant February 2018 - Smarten Up About Rotor Analysis
Efficient Plant February 2018 - Heed These Signs of Inefficiency
Efficient Plant February 2018 - On The Floor
Efficient Plant February 2018 - 37
Efficient Plant February 2018 - IIoT
Efficient Plant February 2018 - Solution Focus
Efficient Plant February 2018 - 40
Efficient Plant February 2018 - Products
Efficient Plant February 2018 - 42
Efficient Plant February 2018 - 43
Efficient Plant February 2018 - 44
Efficient Plant February 2018 - Showcase
Efficient Plant February 2018 - 46
Efficient Plant February 2018 - 47
Efficient Plant February 2018 - Efficiency Insight
Efficient Plant February 2018 - Cover3
Efficient Plant February 2018 - Cover4
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