Installation of services

Installation of ServicesInstallation of Services

Service/service line: connects the customer’sService/service line: connects the customer’s

piping to the gas distribution mainpiping to the gas distribution main

Stub: portion of the service from the main inStub: portion of the service from the main in

the street to the property line.the street to the property line.


Common operating pressure for Common operating pressure for services is 60 PSIG or less.services is 60 PSIG or less.

Common service materials:Common service materials: Plastic (PE) ½” & 1”Plastic (PE) ½” & 1” Steel ¾” & 11/4”Steel ¾” & 11/4” Copper ½” (not used currently)Copper ½” (not used currently)


Components of typical gas service:Components of typical gas service:

Service (tapping) teeService (tapping) tee Plastic (PE) or steel service materialPlastic (PE) or steel service material RiserRiser Riser valve (meter stop)Riser valve (meter stop) Meter set supportMeter set support Meter setMeter set


Components of Meter SetComponents of Meter Set

Riser valveRiser valve RegulatorRegulator Meter barMeter bar Meter swivels/connectionsMeter swivels/connections Gas meterGas meter Customer piping connectionCustomer piping connection



Riser valve – provides a means to Riser valve – provides a means to turn on or shut off gas to the turn on or shut off gas to the customer. Usually the top portioncustomer. Usually the top portion of the valve contains an insulator of the valve contains an insulator which isolates all the undergroundwhich isolates all the underground facilities from the customer pipingfacilities from the customer piping system.system.



Regulator– reduces distributionRegulator– reduces distribution pressure, usually 60 PSIG, to thepressure, usually 60 PSIG, to the proper delivery pressure, usually proper delivery pressure, usually 7” W.C. Function of regulator is to7” W.C. Function of regulator is to reduce pressure and maintainreduce pressure and maintain constant downstream pressureconstant downstream pressure under various load conditions.under various load conditions.


Common Customer Delivery PressuresCommon Customer Delivery Pressures

7” W.C. (1/4 PSIG)7” W.C. (1/4 PSIG) 14” W.C. (1/2 PSIG) >used by WPS only14” W.C. (1/2 PSIG) >used by WPS only *2 PSIG (56” W.C.)*2 PSIG (56” W.C.) *5 PSIG Commercial Customer*5 PSIG Commercial Customer *Requires additional regulator *Requires additional regulator installed on customer piping installed on customer piping system to reduce pressure to system to reduce pressure to safe level.safe level.



Meter Bar – provide means to Meter Bar – provide means to connect and support various sizesconnect and support various sizes of gas metersof gas meters



Meter Swivels/Connectors – providesMeter Swivels/Connectors – provides connections for various sizes of gasconnections for various sizes of gas meters. Can also provide a meansmeters. Can also provide a means of electrical insulator at meter set.of electrical insulator at meter set. Must use a rubber meter gasket to Must use a rubber meter gasket to provide a leak tight meterprovide a leak tight meter connection.connection.



Gas Meter – meter is cash register for Gas Meter – meter is cash register for company to accurately measure the company to accurately measure the amount of gas used during the amount of gas used during the monthly billing cycling. The meter monthly billing cycling. The meter measures in cubic feet which is measures in cubic feet which is converted to therms for billing converted to therms for billing purposes. Meter is sized by the CFH.purposes. Meter is sized by the CFH.



Customer Piping Connection – outlet Customer Piping Connection – outlet of meter set is usually designed forof meter set is usually designed for 1” black pipe connection for1” black pipe connection for residential customers. Outlet canresidential customers. Outlet can be adapted for copper tubing and be adapted for copper tubing and corrugated stainless steel tubing corrugated stainless steel tubing (CSST).(CSST).



Customer Valve– some utilities install Customer Valve– some utilities install an additional shut off valve on the an additional shut off valve on the outlet of the meter set. This provides outlet of the meter set. This provides a means of shutting off the gas to a means of shutting off the gas to the customer without closing the the customer without closing the utility owned riser valve. Operating utility owned riser valve. Operating the riser valve is an OQ covered task the riser valve is an OQ covered task and you must be qualified. and you must be qualified.


Meter Set Locations:Meter Set Locations:

Outside at building wall – preferred Outside at building wall – preferred

Inside building - usually in basementInside building - usually in basement regulator inside but vented outsideregulator inside but vented outside curb valve installed near property curb valve installed near property

lineline


Long Side Service:Long Side Service: Gas service that extends from aGas service that extends from a main located on the opposite side main located on the opposite side of the road from the affectedof the road from the affected building/requires road borebuilding/requires road boreShort Side Service:Short Side Service: Gas service that extends from a mainGas service that extends from a main located on the same side of the road aslocated on the same side of the road as the affected buildingthe affected building


PlanningPlanning

Route – Location & type of main, locationRoute – Location & type of main, location of meter set at customer buildingof meter set at customer building

Locates –What other utilities are in your Locates –What other utilities are in your path & where are they locatedpath & where are they located

Specifications – Company codes & Specifications – Company codes & standardsstandards


PlanningPlanning

Determine customer loadDetermine customer load

1.1. Load in btu/hr converted to cfhLoad in btu/hr converted to cfh2.2. Determines meter sizeDetermines meter size3.3. Determines regulator sizeDetermines regulator size4.4. Determines size of service lineDetermines size of service line


Proper InstallationProper Installation

Service tee connection to mainService tee connection to main

Location & depth of service lineLocation & depth of service line

Meter/meter set locationMeter/meter set locationInstallation must comply with company Installation must comply with company standards & codesstandards & codes


Methods for Installing Service PipeMethods for Installing Service Pipe

BackhoeingBackhoeing TrenchingTrenching PlowingPlowing BoringBoring Insertion into old service pipeInsertion into old service pipe


Attachment Methods to the MainAttachment Methods to the Main

Plastic (saddle heat fusion or Plastic (saddle heat fusion or

electrofusion)electrofusion) Steel (fillet weld)Steel (fillet weld) Cast Iron (mechanical connections)Cast Iron (mechanical connections) PVC & Fiberglass (mechanical PVC & Fiberglass (mechanical

connections)connections)


Consideration of Delivery PressuresConsideration of Delivery Pressures

Low pressure - < 1 psigLow pressure - < 1 psig Medium pressure - 1–60 psigMedium pressure - 1–60 psig High pressure - > 60 psig (requires High pressure - > 60 psig (requires

additional regulator(s) to lower the additional regulator(s) to lower the

delivery pressure) commonly called adelivery pressure) commonly called a

“ “farm tap”farm tap”


Joint TrenchesJoint Trenches

Gas service line in the same trench with:Gas service line in the same trench with: ElectricElectric WaterWater TelephoneTelephone Cable TVCable TV


Installation StepsInstallation Steps1.1. ExcavationExcavation2.2. Install service from main to meter setInstall service from main to meter set3.3. Pressure testPressure test4.4. Tap out service tee (hot tap)Tap out service tee (hot tap)5.5. Purge air out at riser valvePurge air out at riser valve6.6. Connect tracer wireConnect tracer wire7.7. Complete service record & mappingComplete service record & mapping8.8. Backfill & restorationBackfill & restoration


Excess Flow Valves (EFV)Excess Flow Valves (EFV)

A mechanical device installed at the service A mechanical device installed at the service tee that closes when flow in a service line tee that closes when flow in a service line exceeds the design limits of the EFV. Excess exceeds the design limits of the EFV. Excess gas flow can be caused by a break in the gas flow can be caused by a break in the service line from ground movement, natural service line from ground movement, natural disasters or third party damage.disasters or third party damage.



Protected service lines will have a tag Protected service lines will have a tag attached to the gas meter assembly attached to the gas meter assembly between the riser valve and the regulator to between the riser valve and the regulator to identify an EFV is installed on the service identify an EFV is installed on the service lineline



Designed to allow a small amount of gas toDesigned to allow a small amount of gas to bleed by after the valve(EFV) has tripped.bleed by after the valve(EFV) has tripped.If the EFV is tripped during purging, close If the EFV is tripped during purging, close the riser valve and wait 5 to 10 minutes for the riser valve and wait 5 to 10 minutes for the service line to repack. Pressures will the service line to repack. Pressures will equalize on both sides of the valve and resetequalize on both sides of the valve and reset it.it.

Education

Installation of services