Template.ppt 04/06/12 Kurt…. 1 minute WACHS & Tampa - Pilot Program Results (08-22-07)
Template.ppt 04/06/12 Kurt…. 1 minute WACHS & Tampa - Pilot Program Results (08-22-07)
Wachs Water Full Service
Review of Condition Assessment Technologies in Pipelines Cliff Jones February 23, 2012 LOOK BEFORE YOU DIG!!
Condition Assessment All pipes/ pipe materials leak All pipes can break 1 in 10 leaks will result in a break Industry figures show you can expect to find one leak a mile in DI or CI transmission mains (>16”) Condition assessment helps you proactively manage pipelines Control helps you reduce the cost of main breaks
Control Asset Usability 60% is National Average Usability2 of 5 valves on average are not usable
What our experience has taught us 40% of all water valves are unusable 12% of all hydrants are unusable; including inadequate flow 11% of all valves are paved over 9% of all distribution valves are found in the wrong position: shut & open Spatial offsets > 30 feet
Control Asset Usability“As-Designed”… three valves to control a main“As-Is”… five ++ valves to control a main Find the (right) valve Access the right valve Shut/open the right valve
So What? You can only replace or repair a certain percentage of pipe each year. You still need to manage the system What happens to the other 95%? Condition Assessment and Repair of a pipeline is typically 10-12% of the replacement cost. If the technology or the repair is such that this number grows to >25% - you should replace the line
Investigator™Condition Assessment of In-Service Distribution Mains via Fire Hydrants
Investigator™ Technology Simplified pipeline condition assessment technology Designed for distribution mains Non destructive inspection No disruption to service Single pass acoustic, CCTV video and sonde mapping In-line system increases accuracy
Quebec Ski Village – Saint Sauveur Investigator™ inspection of low pressure issues 6” and 12” metallic mains Identified significant tuberculation build-up on 6” line Validated that 12” line was in good condition 9 insertions completed with average distance of 150 feet Provided utility with information to target CIP investments on problem areas
Buffalo Grove, IL 8” and 20” metallic mains Over 20 insertions Waterous hydrants Launch tube flange option allows for: Correction of as-built drawings - Longer distance inspections Pre-construction valve asset - Larger diameter main inspections identification (road paving) Wachs Water Services can conduct hydrant Pipeline diameter confirmation maintenance in parallel with water main inspections Visual, in-line valve exercising
Montreal Suburb – Dollard des Ormeaux Investigator™ inspection of main prior to road re-paving 6”, 8”, 12” metallic lines installed in 1960’s 5 insertions on lined and unlined pipe One line had substantial sediment and we validated Tuberculation at T-joint need for flushing program Lined main in good condition but tuberculation identified on unlined T-joints Cable insertions averaged 15 to 180 feet depending on internal pipe conditions Liner in good condition
Texas Client was concerned about low flow conditions in pipe and wondered about tuberculation Photo taken of inspection screen – Showing magnesium mineral deposits
Operator Control Simultaneous Video and AcousticClear PeakOver Leak Site
Client Issue PVC pipe, up to 12 ft deep Correlators and leak sounding did not work Turned to Investigator™ Acoustic/CCTV in-line technology 31 insertions through fire hydrants (top insertion) Each insertion inspected up to 600ft of main Pressure in pipe ranged from 75 to 180 PSI
Example 1 Concern about leak under culvert Two leaks discovered on either side of a T-joint at a depth of 18ft leading to 18ft the culvert. Investigator™ was able to clearly distinguish individual leak sounds prior to challengingInvestigator™ confirmed that there was excavation/repair.no leak under culvert…but…
Example 2 Water main installation issues identifiedVisible gasket with a tear at a Significant debris in pipe despitemisaligned pipe joint. Leak identified at flushing and cleaning resulted in waterhigher pressures. quality issues.
Example 3 Acoustic and video confirmation of leaks at two pipe joints. Accurate leak locating with Sonde. Sonde Mark Leak
Value of video Visual identification of installation defects at the Point of InterestKink in pipe wall and poor joint connection. Joint gaskets exposed over 3 consecutiveNo current leak. pipe sections. No current leak.
Value of Investigator™ Video Despite “blue wash” created by LED light reflection within PVC pipe, in-line video clearly identified: Pipe joints Valves (A) B T-joints A Repairs Gaskets Wall kinks (B) Air pockets Debris - mud and rocks (C) Grease at joint connections Cloudy and clear water conditions C
Austin: Does a 36” BF Valve work properly? Watching the valve operate from inside the pipe
Additional Access PointsService Fittings Ball Valves Flow Meter Entry Points and any Direct TapingAir Valves
In-Line Asset LocatingClosed gate valve Identification and location (GPS) of undocumented valve
Tuberculation and Flow RestrictionsEarly stage of tuberculation build- Early stage of tuberculation build-up at pipe joints and lips up at pipe joints
Tuberculation and Flow RestrictionsSevere flow restrictions due to late stages of tuberculation build up. Leads to pressure loss.
Joint InspectionCorrosion at cast iron pipe joint Clean joint verification
Liner InspectionPost liner quality inspection and verification. Prioritization of pipelines to rehabilitate.
Validating Leaks with InvestigatorTap located and confirmed not to be a leak Change of material confirmed not to be a leak as identified by correlation
Visual Inspection for Signs of Pipe Failure Pipe wall cracks and failures
General InvestigationsContaminant in water main identified Records indicated that pipe segment was(construction debris) after water lined, investigation proved otherwise.quality complaints.
System Mapping Critical for accurate uni- directional flushing plans and hydraulic modeling Confirmation of as-built drawings Pre-construction planning Emergency shut-down planning Asset mapping of PVC pipe can only be done from inside of pipe
Condition Assessment Information Full data report on inspection process, location and findings Still photos, Video and audio provided on CD/ DVD Coming soon - Tuberculation accumulation grading
GIS Integration Clickable GIS pipeline attributes GPS coordinates of insertion points Electronic and acoustic MPEG links Confirmation of distance inspected from location points
LDS1000™Condition Assessment of Large Diameter Transmission Mains
LDS1000™ Technology Designed for transmission mains No disruption to service Single pass acoustic, CCTV video and sonde mapping/tracking In-line system increases accuracy Builds on in-line leak detection system developed by WRC over 15 years Global projects completed in US, Canada, England, Philippines and Australia
Access to Pipelines 2 inch (ID) tap Existing Sahara chambers Air valves Service fittings Gate valves Pressure taps
Pipeline Inspection Operator is in control at all times Operator has “eyes and ears” in the pipe Operator has ability to stop to look at features Inspection typically occurs during implementation & pull back Increases inspection accuracy and minimize false/positives
Advanced Sensor Head Sensor head allows for simultaneous acoustic, CCTV and mapping/tracking Greater locating accuracy as system does not rely on stationed pinging Patented Agitator™ deployment system uses flow of water to push sensor in less turbulent zone around pipe wall Turbulent Result is increased inspection Zone efficiencies which reduces cost
Superior CCTV Image Quality High quality CCTV image quality Stable image due to patented Agitator™ deployment system No need for post processing – see immediate results Lighting optimized for large diameter mains CCTV signal quality does not degrade due to cable limitations
No-Flow Process OverviewLow flow conditions or pipe crawlers can also be used to carry the LDS1000™ cable/sensor down the pipeline.
Key Specifications Investigator Pipe Material Any Typical Pipe Diameter* 16” + Tap Requirement 2” (ID) Minimum Flow 0.75 ft/sec* Maximum Flow 10 ft/sec Maximum Pressure 240 PSI Inspection Distance 3,200 ft Degrees of bends >180 * LDS1000™ can operate in a wide variety of flow conditions. Operation can beachieved in even lower flow conditions but distance and bends capabilities will change.
Distribution System Confidence to Make the Right Investments Eliminates needs for excavations Eliminates replacement/lining of pipes that are still in good condition Allows for comparison of pipeline degradation over time Provides understanding of actual pipe condition Maximize aging infrastructure investments
Summary Inspection of all water distribution lines 2” to 102”+ Identify issues internally Low cost first pass evaluation Lines remain in service Look Before You Dig!!