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Pipeline Condition and Asset Management
Chesapeake AWWA – When it Breaks, it Pours January 16, 2014
Ian Mead P.E., BCEEProvidence, RI
Agenda
• Why is This Important?• Asset Management Framework and Risk• The Condition Assessment Toolbox• Case Studies• Wrap Up
Why is This Important?
When it Breaks, it Pours
• Los Angeles Sept. 2009
When it Breaks, it Pours
• Atlanta GASept. 2009
When it Breaks, it Pours
• Washington D.C. 2008
• Providence, RI 1996
A Wake-Up Call To Utilities
Approach: Condition Assessment and Asset Management Programs
Defensible & Sustainable
CapitalPlanning
• Review existing information• Determine remaining service life and renewal needs for pipes
• Desktop probability of pipe failure/condition analysis• Review pipe assessment tools and approaches
• Location of buried facilities• Verification of high points• Preparatory field work
(excavations, pipe access, soils, and water)• Procurement of appropriate technology vendors• Implementation of pipe assessment tools
New Prioritization Approach is a Continuous Process
Capital Plans
GIS Data
Hydraulic Model
O&M DataField Samples
Anecdotal Data
Innovyze CapPlan®
Riva DS
Defensible & Sustainable
CapitalPlanning
Casses/LEYP
ManagementStrategies
KANEW
ASSET CONDITION RANKING
SERVICE LIFE ANALYSISDATA GAP REVIEW
0
1
2
3
4
5
6
2011
2023
2035
2047
2059
2071
2083
2095
2107
2119
Lined DI – 1976 ‐Present
Lined DI 1968 –1975
Lined Cent CI ‐1957 ‐ 1975
Lined Cent CI ‐1936 ‐ 1956
• Service Life Analysis ‐ KANEW– How much is required over time?– Budget impacts shown over time
• Statistical Failure Analysis– What do past breaks/condition say about existing pipe condition?– How strong are correlations and which factors have greater affect on pipes?
• Micro Modeling –Innovyze CapPlan©, Riva DA or Others– Weigh the various parameters that impact renewal– Produces a list of pipe segments for renewal
or inspection
Using Advanced Tools for Inspection Prioritization
Condition Assessment Toolbox
• Visible Structural Defects‐ CCTV video of all pipe types‐ Valve location and operation
• Finding Pipe Locations & Voids‐ GPR, Potholing, PPR
• AC Pipe Issues• Leaks
‐ All pressure pipe types
• Wall Thickness Degradation‐ Corrosion of Metallic Pipes
• Loss of Wire Prestress‐ PCCP
Leak Detection Tools
• Pure Technologies– Free Swimming with SmartBall– Tethered with Sahara (Pipe Wall Assessment and CCTV)
• Wachs– Acoustics and CCTV from valve, hydrant, or tap– Assessment and exercising of valves
• Echologics– Acoustic leak detection– Acoustic condition assessment
• Other– Correlators, ground microphones
Wall Thickness Tools
‐ External vs. Internal?‐ Destructive vs. NDT?
• Ultrasonic/Impact Echo (NDT Corp)• Electromagnetics/BEM/Magnetic Flux Leakage (PICA,
InfraMetrix)• Coupons/Coating Tests• Corrosion Assessments/Sampling
PCCP Wire/Pipe Assessment Tools
• Electromagnetics (EM – Pure Technologies)• Resistance Testing• Coupons/Wire Tests• Corrosion Assessments/Sampling• Fiber Optic/Acoustic Monitoring of Wire Breaks
Free Swimming Inline Leak and Gas Pocket Location: SmartBall™
Investigator™
Wachs Leak Detection
LDS1000™ by Wachs Water ServicesCondition Assessment of Large Diameter Transmission Mains
Acoustic Condition Assessment
• Acoustic signals induced in pipe by flowing water or acoustic exciters
• Velocity of acoustic wave is measured, wall thickness is calculated from propagation delay
• Calculated wall thickness is average value for pipe section along which velocity is measured, typically 300 – 400 foot long sections
Noise Source
Measure soundvelocity
Ultrasonic Investigations
Ultrasonic (Echo Impact) Investigations of PCCP
Sonic/ Ultrasonic / Impact Echo Measurements
Full ThicknessPipe Resonance No Resonance Coating Thickness
Resonance
Impact
Sensors
Micro-crackedArea Delamination
SONIC/ULTRASONIC DATA ANALYSIS
Determines Condition of each pipe section
•Concrete Strength parameters•Core Cracking•Pipe thickness
Coating delamination Erosion
Inner core delamination•Location and severity of deterioration
PICA Sea Snake for Ferrous Wall Thickness and Pitting
• Ferrous pipe sizes from 4” diameter to 78” diameter.
• Under pressure or in a drained pipeline.
• Measures changes in wall thickness.
• Detect localized pitting and general corrosion
• Can see corrosion on both the interior and the exterior of the pipe.
PICA reports the location and the severity of each defect.
6” tool
20‐28” SeeSnake tool
PCCP Wire Break Assessment and Monitoring
Robotic EM Assessment
Manned EM Inspections
Free Swimming EM Tool
Wire Resistance Testing
Electric Resistance Measurements Between Adjacent Wires
Pipe Penetrating Radar
Condition Assessment Programs
• Assessment Report– “Real Time” Pipe Condition at Test Locations– Modification of Criticality Analysis (LoF, CoF)– Optimization of System (ARV, Blowoffs, etc.)
• Recommendations for CIP Projects • Develop Emergency Response Plan
– Catastrophic and Critical Pipe Failures– Mitigation of Environmental Impacts– Remediation of Property Damage
• Define or Modify Preventative Maintenance Program
• Large Water Utility• Impact Echo• Visual Inspection• Hammer Sounding• Soil and Groundwater Testing
• Electromagnetics
• Large Diameter PCCP• Failure Risk curves• Fiber Optic Monitoring • Rehabilitation• 5‐year Cycle• $1M CA Program
Case Study ‐ RI
• Large Water Utility• Impact Echo• Visual Inspection• Hammer Sounding• Electromagnetics for PCCP
• Acoustic Leak Detection
• Large Diameter Water Transmission Mains
• Tethered Leak Detection• CFRP Repair• Joint Seals• Follow Up Inspections• $500k
Case Study ‐MA
• Large Sewer Utility• Pump Station Upgrades• Surge Analysis• Soil and Groundwater Testing
• $800k
• Various Diameter PCCP• Failure Risk curves• Acoustic Leak Detection• Acoustic Pipe Integrity Testing
Case Study ‐ NY
• Large Water Company• Risk Prioritization• Various Diameter PCCP• Evaluate CA Tools• Phased Implementation
• Water Authority• Multiple Types and Diameters
• Pilot Technologies• Risk Prioritization• Evaluate All Assets• Master Plan
Case Study ‐ NJ Case Study ‐ HI
Wrap Up
• Be Prepared• Evaluate Asset Management Framework• Know Your Toolbox• Be Proactive
Questions?