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www.aga.org/how-does-natural-gas-delivery-system-work

Gas flowing from higher to lower pressure is the fundamental principle of the natural gas delivery system. The amount of pressure in a pipeline is measured in pounds per square inch. From the well, the natural gas goes into "gathering" lines, which are like branches on a tree, getting larger as they get closer to the central collection point.

inspectapedia.com/plumbing/Gas_Pressures.php

Natural gas in the natural gas service line pressure in the gas main in the street will be found at pressures from 60 psi down to as low as 0.25 psi or about 7 inches of water column. Natural gas pressure at the gas meter: Depending on the application gas meters may operate at 7" w.c., 0.5 to 2.0 psig, or at pressures over 2.0 psig.

www.eia.gov/.../index.php?page=natural_gas_delivery

Gas-oil-water separators: Pressure relief in a single-stage separator causes a natural separation of the liquids from the gases in the natural gas. In some cases, a multi-stage separation process is required to separate the different fluid streams.

www.hunker.com/12578103/natural-gas-pressure-in-a-house

The pressure of natural gas delivered to the home is typically 1/4 lb. per square inch. The natural gas must first be transported at higher pressures through large pipelines that connect the well field to the local supplier.

hvac-talk.com/vbb/showthread.php?1587361-What-is-typical...

What is typical natural gas pressure supply to a residential regulator? I have an intermittent problem with a water heater shutting off. I hooked up my water manometer to the inlet of the gas valve and it blew the water out of my manometer. I refilled it and hooked it back up and it read a steady 4.8 inches of water column.

naturalgas.org/naturalgas/distribution

The delivery point where the natural gas is transferred from a transmission pipeline to the local gas utility is often termed the ‘citygate’, and is an important market center for the pricing of natural gas in large urban areas.

www.socalgas.com/.../builder-services/elevated-pressure

Natural gas piping systems in residential single-family and multi-family buildings typically operate at standard delivery pressure, 1/3 pound-per-square inch gauge.

www.cpsenergy.com/.../Gas_Service_Standards_CPSEnergy.pdf

monitor regulator at 150% of the Customer’s delivery pressure for delivery pressures less than one (1.0) psig and 125% for delivery pressures over one (1.0) psig. Example: if the Customer is receives gas through an industrial meter set at 3-psig, they must be capable of handling a 3 ¾-psig maximum delivery pressure.

www.peco.com/WaysToSave/ForYourHome/Pages/ForYourHome.aspx

Economical. Natural gas is the lowest cost fuel option for heating when compared to heating oil and propane. For instance, you would have to pay $1.45 per gallon for heating oil and $.96 per gallon for propane to equal the price of natural gas.

forum.heatinghelp.com/discussion/78767/what-gas-pressure...

What gas pressure does your utility supply. tim smith_2 Member Posts: 184. ... The Gas Company changes the spring on the regulator at the meter and you have 2PSI gas delivery. You the contractor will have to set up the appliances with step down regulators and make sure your piping is tight and true. ... able to get a special regulator/meter set ...