Why are regulators used in natural gas distribution?
In this back to basics entry, I discuss why natural gas pressure regulators are used in a delivery system.
After natural gas makes its way out of the well, into gathering and transmission systems, and gate stations, it ultimately enters distribution lines (or “mains”).
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B31 residential regulator |
While gas is in the distribution system, regulators control the flow from higher pressure to lower pressure. Regulators sense if the pressure in a line drops below a specified set point and opens, allowing more gas to flow. On the other hand, if pressure rises above a set point the regulator will close so that the downstream pressure adjusts.
When natural gas leaves the main, it travels through a “service line” to reach homes or businesses. This service line is likely to be polyethylene, perhaps an inch or less in diameter and ranges from about 60 PSI to ¼ PSI. Once the gas reaches the home or business meter it passes through another regulator to reduced the pressure under ¼ PSI and is measured in water column.
Throughout the gas delivery system, from the well to the stove burner, regulators are used to adjust the pressure to ensure safety.
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