How deep should a gas pipe be buried in Texas?

Depending which country you live in will depend on depth. Consulte your local municipality for the laws applying to you. In South Africa, depending on the size, Diameter of pipe, less than 75mm, not less than 650mm below the surface of the ground. More than 75mm but less than 110mm, not less than 1500 below the surface of the ground. More than 110mm, not less than 2000mm below the surface of the ground.