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Assessing Water Loss in Plastic Pipes In Water
Distribution & Transmission Systems
Tuesday, December 5, 2017 at 7:35AM PDT
Carissa Boudwin, Dir. Marketing, Electro Scan Inc., carissa@electroscan.com
BOOTH #502
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Agenda
1. Plastic Pipes & Acoustic Sensors
2. What is Low Voltage Conductivity?
3. Manuals & Standards
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Low Voltage Conductivity
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Leaks In Plastic Pipes
1. PVC & HDPE
2. Acoustic Sensors in Plastic Pipes
1
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
PVC
PVC
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HDPE
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Good Fusion Joint – Fully Acceptable
Melt Out Unacceptable – Possible Causes: Pipe Ovality, Flat Spots,
Undersized Pipe and Binding
HDPE
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
“Tried-and-True” Method
External AcousticSounding
Listeners
Correlators
Leak Loggers
Permanent Leak Detection
Non-AcousticGas Tracer
GPR
Themography
Satellite
Low-Voltage Conductivity
Typical Frequency Ranges
• Human male voice 125 – 2000 Hz
• Human female voice 250 – 5000 Hz
• Fran Drescher’s Voice 5000 - 7000Hz
• Typical 6” cast iron pipe 200 – 800 Hz
• Typical 6” PVC pipe 5 – 30 Hz
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Sound Velocity Travels at Different Rates When Water is Under Pressure, Depending on Pipe Material and Size
How Far Can General Distance Sounds
Travel? 2 GPM Leak at 60 PSI
PVC and HDPE
Acoustic Inspection
• Takes Much Longer to Complete.
• Multiple trials at different filter settings to
dial in the most accurate setting.
• Plastic pipe frequencies are extremely
low and in a narrow band.
• Cost can be higher with plastic than iron
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Low Voltage Conductivity
1. How Does Low Voltage
Conductivity Work?
2. Results
2
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Low Voltage Conductivity
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
WRONG DISTANCE
RIG
HT
DIS
TAN
CE
RIGHT DISTANCE
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
“If a Pipe Leaks Electricity,It Leaks Water.”
- Elementary Geophysics
E
I R
Ohm's LawE = IR ; I = E/R ; R = E/I
Where:“E” volts“I” amps“R” ohms
Torricelli’s Law
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Electro Scan’s Tri-Electrode Array in a Water Main.
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Low Voltage Conductivity
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Low VoltageByPipeMaterial
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Low Voltage Conductivity
Standards & Manuals
1. AWWA M77
2. ASTM
3. O&M Manual
3
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
AWWA M77
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
c. Low Voltage Conductivity method
AWWA M77
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
Electro Scan Inc. | Copyright © 2017. All Rights Reserved.
1745 Markston Road Sacramento, California 95825-4026 USAinfo@electroscan.com | Tel: +1 916-779-0660 | www.electroscan.com
The Black Church, St Mary’s Place, Dublin 7, IRELAND info@electroscan.comTel: +35 3 (0) 1 687 4514 VAT: IE 3237750VH
71-75, Shelton StreetCovent Garden, London, WC2H 9JQ, ENGLANDinfo@electroscan.co.uk,Tel: +44 (0) 20 7692 8729, Company Nr: 9211607
CORPORATE HEADQUARTERS
Lyoner Straße 14,Frankfurt, D-60528GERMANYTel: +49 69 6655 4132
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I N T E R N A T I O N A L O F F I C E S
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