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Shallowly Buried. Gas lines can be as shallow as 12 inches below the surface. Plastic lines need to be at least 18 inches in some areas and require a metal wire to be wrapped around them. This allows a pipe finder to locate the pipe if necessary. The gas lines run to a meter that is normally located on the side of the house.
Normal depth requirements are 2 to 4 feet to top of pipe. Many transmission pipeline companies transport gas to metropolitan markets. Figure 1.2-1. shows the installation of a typical transmission pipe in a remote location. It should be noted that the average diameter of a natural gas transmission pipeline in the. western states is around 20 inches with an average length of around 11 miles per segment.