North Applying ECDA Methodology for Local Distribution ... · DCVG Direct Current Voltage Gradient...
Transcript of North Applying ECDA Methodology for Local Distribution ... · DCVG Direct Current Voltage Gradient...
North
Applying ECDA Methodology
for Local Distribution
Companies
Josh Brewer
What’s Covered
Regulations
What is ECDA
Tools Used
Data Presentation
TRIMP vs DIMP
Applying ECDA to Distribution
TRIMP Transmission Integrity Management
DIMP Distribution Integrity Management
TRIMP
CFR 49, Part 192, Subpart O
• Have a plan
• ECDA, ICDA, SCCDA, CDA
• 4 Steps
• Pre, II, DE, Post
• High Consequence Area
• Reference
• NACE SP0502
• ASME/ANSI B31-8S
TRIMP
NEW
• BILL 112HR2845
• Evaluate need outside HCAs
• 76 FR 53086
• Advanced Notice of
Proposed Rulemaking
• RIN 2137-AE72
DIMP
CFR 49, Part 192, Subpart P
• Have a plan
• 7 Elements 1. Know the system
2. Identify threats
3. Evaluate and rank groups
4. Identify and implement measures to
manage the risk
5. Measure and monitor the results
6. Evaluate and improve the program
7. Reports to government agencies
ECDA
• Preassessment
– Gather info
– Make plan
• Indirect Inspection
– Survey
• Direct Examination
– Excavate
• Post Assessment
– Evaluate process
Surveys
CIS
Close Interval Survey
Close Interval Potential Survey
CIS
CIS
CIS
Surveys
DCVG
Direct Current Voltage Gradient
DCVG
DCVG
DCVG
Surveys
ACVG
Alternating Current Voltage Gradient
ACVG
ACVG
ACVG
ACVG
Surveys
ACA
Alternating Current Attenuation
PCM
Pipeline Current Mapper
(RadioDetection)
PCM or ACA
PCM or ACA
Surveys
Location
Depth of Cover
Location
conductive
Pipe
Transmitter Receiver
Location
inductive
Pipe
Transmitter Receiver
Location
Surveys
Soil Resistivity
Wenner Four-Pin
Soil Resistivity
a
r = 2 p a R
a a
P1 P2 C1 C2
Resistivity
Test
Instrument
Soil Resistivity
Surveys
GPS
Global Position System
Global Positioning Satellites
GPS
GPS
GPS
GPS
GPS
CIS
ON/OFF
CIS
ON/OFF/Static
CIS
ON/OFF/Static
CIS
Sawtooth
CIS
Exceptions
CIS
Waveprint
PCM
DCVG / ACVG Calculations and Classification
GPS
Post-Process
GPS
Maps
GPS
Maps
GPS
Maps
GPS
Alignment
GPS
Soil Res / Depth / DCVG / PCM
Recommendations
Dig Here
TRIMP vs DIMP
TRIMP
• Follow rules
• Defining regions
• As system exists
– Shorted
– Passivation/immunity
• Required digs
– Several categorized immediate
• Deadlines (12/17, replacement)
• Changing tools – changing regions
DIMP vs TRIMP
DIMP
• Regions or considerations
• Shorted system
• Redefining Immediate
• Changing tools
• Deadlines
• Selecting digs
Where to Dig?
DIMP
PURPOSE?
Bad areas on your pipe
• Deficient CP
• Stray current
– Foreign operators
– Transit system
• 3rd party damage
• Specific other
• Unknown
• GPS, GIS, Maps
DIMP
CONSIDERATIONS
• Paved areas
– Small skips
– Offsets
• Hybrid systems
– Focus on trends
– Incorporate IR considerations
• Interference testing
• What data do you want/need
The End
Questions?