How deep should a gas pipe be underground?
A gas main should normally be laid with a minimum depth of cover of 750 mm in a road or verge and 600 mm in a footpath. A gas service pipe should normally be laid with a minimum depth of cover of 375 mm in private ground and 450 mm in footpaths and highways.
Biogas contains less methane than natural gas, but can be refined and used as an energy source. Deep natural gas is an unconventional gas. While most conventional gas can be found just a few thousand meters deep, deep natural gas is located in deposits at least 4,500 meters (15,000 feet) below the surface of the Earth.
- Gas: No standard depth; 24 inches average, 36 preferred. Sewage: 24 to 36 inches in most parts of the country. Water: 36 inches is national standard; can be any depth if not subject to freeze. Telephone: If line is in conduit, can safely be at any depth; without conduit, should be at least 24 inches.
- The average well is up to 8,000 feet deep. The depth of drinking water aquifers is about 1,000 feet. The problems typically stem from poor cement well casings that leak natural gas as well as fracking fluid into water wells.
- Over the last six decades, it's only gotten deeper. In 1949, the earliest year with data available, the average depth of oil wells drilled was 3,635 feet. By 2008, the most recent data available, we were drilling an average of 5,964 feet, a slight decrease from the 2007 at 6,064 feet.
In the Triad (as in most of North Carolina), water and sewer lines only need to be buried 12 inches deep. This is to accommodate the frost depth of the region, which rarely goes below nine inches. In the mountains, careful plumbers will install pipes closer to 18 to 24 inches, even though code only calls for 12.
- This measurement is from the top of the pipe to the surface of the soil, which means your trenches must be slightly deeper to accommodate the pipes. For example, if you're using a pipe with a 2-inch diameter and you want it buried 10 inches below the surface, your trench must be 12 inches deep.
- The coldest temperature at 20 inches was 35° in 1996, and the coldest 40-inch temperature was 42° in 1978. The coldest 8-inch temperature was 28° in 1982 and 1996. Soil temperature records in southern sections of the state indicate the frost line has never reached the 20-inch depth at Mount Vernon.
- Your local frost line depth is a good example of this. In Atlanta, our frost line is 12", meaning that nothing deeper than 12" below the surface of the ground should ever freeze. I've heard that the frost line in Pennsylvania is 42"that's almost four times deeper than what I'm used to in Peachtree City, GA.
Updated: 2nd October 2019