Gas And Piping Flashcards
What is the gas distribution piping system
Gas well-
Production piping-
Gas plan
Gas transmission line-
Utility metering station
Gas main-
Service piping
Building supply
Finish piping
(5 psi drop per)
What is the Pressure testing meters min and max range
15%min
300%max
Service meter must be at least
3”
How long do you pressure test pipe that is rated for 2 working psi 200 meters or less
15 min on 15 psi
How long do you pressure test pipe that is rated for up to 2 psi and more than 200 feet long
15 psi for 60 mins
How long do you pressure test pipe that is rated for over 2 psi and less then 200 feet
50 psi for 60 mins
How long do you pressure test pipe that is rated for over 2 psi and over 200 ft long
50 psi for 180 minutes
How long do you pressure test pipe that is rated for over 33 psi and any length
1.5 times maximum operating pressure for 180 minutes
What instrument do you use to test finished pressure
Manometer
Test the valve
Train
Water has a density of
62.4 lbs/cubft
Gas main line has a pressure of
12-80psig
Building supply piping has a wc
7-14” WC
Finish piping has a wc
3-4WC
Standing pressure is
Taken between the meter and the appliance with none of the appliances firing
Operating pressure is
Taken between the meter and the appliance with all appliances firing
Pressure differential is
Difference between standing pressure and operating pressure
Manifold pressure is
Taken between the appliance control valve and the burner while the appliance is firing
For a propane tank the outside line must be what psig
5-10
A propane tank stored outside of your house is at what psig
0-150 psig
The inside pipe in your house for a propane tank stored outside is what WC
11-14”
28” of water column is equal to
1 psiA
Who is only allowed to work on gas meters
Atco employee