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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.aga.org/natural-gas/delivery/how-does-the-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.

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

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.

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. At that point, the gas is processed and the pressures are reduced for safe delivery to residential users.

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

Delivery of natural gas to consumers. ... 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.quora.com/What-is-the-typical-residential-natural-gas-pressure-supply

Most fuel gas codes allow some variability in the choice of operating pressure. Traditionally, the use of 1/2 psigsystem pressure has dominated U.S. practice. There are several areas where 2 psig systems are used, in which the entire system is ess...

www.gastite.com/downloads/pdfs/gastite_sizing_tables_natural_gas.pdf

Section 7: Sizing Tables and Pressure Drop Charts Table 7-5 Maximum Capacity of Gastite®/FlashShield™ Flexible Gas Piping in Cubic Feet Per Hour of Natural Gas with a Gas Pressure of 0.5 psi or Less and a Pressure Drop of 3.0"WC Line Regulator Outlet (8 in.WC ) (based on a 0.60 specific gravity gas) Tubing Tubing Length (ft)

www.socalgas.com/for-your-business/builder-services/elevated-pressure

By delivering higher operating pressure, both the size and cost of the natural gas piping system can be reduced. As residential buildings get larger and more complex with additional natural gas appliances, the traditional method of providing the required natural gas volume is accomplished by increased pipe size.

www.cpsenergy.com/content/dam/corporate/en/Documents/Gas_Service_Standards_CPS...

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.nwnatural.com/Business/Services/CommercialDeliveryPressureStandards

Commercial Process Improvement Effective June 1, 2016 As of June 1, 2016, NW Natural will begin providing 2-psig gas delivery pressure as the standard delivery pressure for all services on commercial properties going forward.