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The City of Mesa EFV Program. Anthony Cadorin Gas Planning Engineer City of Mesa Natural Gas Division Mesa, Arizona. CNG Truck Driver. Program. Began installing EFVs January 1, 2008 7/17/2008 – Over 1200 installed. Where EFVs are Installed. All New Single Family Residential Homes

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the city of mesa efv program

The City of Mesa EFV Program

Anthony Cadorin

Gas Planning Engineer

City of Mesa Natural Gas Division

Mesa, Arizona

program
Program
  • Began installing EFVs January 1, 2008
  • 7/17/2008 – Over 1200 installed
where efvs are installed
Where EFVs are Installed
  • All New Single Family Residential Homes
  • At the tap wherever possible
    • Stubs installed before January 1, 2008 use a mechanical coupling at the property line
  • Any maintenance/renewal work at the property line or at the tap
why at the tap
Why at the tap?

70 Total damages to service lines in 2006

52 Resulted in blowing gas

13 Damages in the street

11 Damages to new construction

2 Damages to lines with existing houses

25% of service line damages would not be protected by the EFV with it at the property line/back of curb

where efvs are not installed
Where EFVs are NOT Installed
  • Branch services
  • Multi-meter services
  • Non-residential customers
  • Maintenance or renewals that don’t expose the service at the property line or tap (I.e. riser replacement)
  • Pre-determined areas with high contaminant levels
  • Connections to stubs that already have an EFV at the tap
how efvs are installed
How EFVs are Installed
  • Majority are ½” PE fusion tapping tees with 800 series EFVs
  • No additional cost incurred from the contractors
    • Same amount of joints as before installing EFVs
  • Move away from “side saddle” aka “service saddle” or “branch saddle”
    • Shavings
sizing

250 Class Service Meters

400 Class Service Meters

800 Class and 1000 Class Service Meters

½” CTS

600 Series

75 feet max. length

800 Series

45 feet max. length

Not an option

½” IPS

800 Series

300 feet max. length

800 Series

300 feet max. length

1800 Series

70 feet max. length

1” IPS

1800 Series

750 feet max. length

1800 Series

750 feet max. length

1800 Series

750 feet max. length

Sizing
purging and testing
Purging and Testing
  • City of Mesa does not test the EFVs
  • Purging – “purge at a slow flow to avoid tripping the EFV”
    • Hands on training module to practice this
  • When the EFVs do trip, they are very quick to reset!
trivia
Trivia

How many gas guys does it take to replace a light bulb?

2! One to remove the electrical outlet and one to pipe in the gas lamp

training
Training

“All truth passes through three stages: First, it is ridiculed; Second, it is violently opposed; and Third, it is accepted as self-evident.”

- Arthur Schopenhauer

dirt debris
Dirt & Debris
  • Clear out the mains whenever possible
  • Seal off the end of the pipes when installing the service line
  • Extra care to remove shavings
cleaning up dirty line hits
Cleaning Up “Dirty” Line Hits

Test services to find the low point of the stretch of pipe

Dig up and purge all of it out of main

Visual inspection with camera truck

Flush it out with water

Dry with compressed air

~1 Day

sleeving standards
Sleeving Standards

Previously used 1-1/4” sleeving

If the appliance load or service length dictates a 1” service line, sleeving must be excavated

Now using 2” sleeving

mixed size services
Mixed Size Services

½” Stub

1800 Series EFV

1” Service Line Completion

11C Gas Meter

false dead services
“False-dead” Services
  • 3rd Party Digs into a service stub no blowing gas
  • Assumes dead line
    • Maintaining level of 3rd party awareness efforts
    • Leak survey sites before homes are installed
questions
Questions?

Anthony.Cadorin@cityofmesa.org

(480) 644-4851