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ASSET CONDITIONMONITORING
+ ASSET RELATED EXAMPLES
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PERFORMANCEMONITORING:WHAT DOES IT TELL US?
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NETWORKPERFORMANCE
Optimisation
process
Winter
Leakage
Winter
Leakage
Consistent
Flow / NL
profile
Consistent
CP profile
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WHAT ELSE?
Optimisation
process
Winter
Leakage
Winter
Leakage
Consistent
Flow / NL
profile
Consistent
CP profile
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CLOSER INSPECTION:SEPTEMBER - APRIL
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CLOSER INSPECTION:WITHOUT FLOW
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IF YOU ENABLE ADVANCEDMONITORING:WHAT DOES THIS TELL US NOW?
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SO WHAT WAS GOINGON?
PRV sticking
Increased
Unexpected
P2/P3 pressures
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SEQUENCE OF EVENTS
Phase 1
Event 1
Event 2
Event 3 Event 4
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APV ACTIVITY LOG
PRV
Serviced
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THE OUTCOME
+ Root cause was PRV asset condition
+ Initially perceived to be zone integrity issue
+ Increase in NL –
presumed leakage
+ Assumed control equipment failure
+ Advanced monitoring confirmed root cause
+ 3 major service visits required to PRV before finally
resolving
problem
+ Is your PRV monitoring and maintenance programme
delivering the quality and results you expect?
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PRV STABILITY ANDHIGH SPEED LOGGING
Long term optimised performance – with flow CP
pressure reduced from 40m to 24m
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UNDERSTANDING THEROOT CAUSE
Rectified remotely by flow modulating during day and operating
in
fixed outlet mode at night
Before After
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HIGH SPEED LOGGING:1 MINUTE
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HIGH SPEED LOGGING:1 SECOND
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