Definition - What does Direct Burial mean?
Direct burial refers to a standard approach to laying pipelines after construction prior to commissioning underground. The piping is properly installed according to ASTMD 2774 “Standard Practice for Underground Installation of Thermoplastic Pressure Piping” in order to ensure pipeline longevity and reduce the rates of corrosion and degradation.
Corrosionpedia explains Direct Burial
Direct burial pipeline installation approaches must be done to ensure suitable embedment is obtained around the pipe. These earth/ground materials must be placed so that the pipe is perfectly supported in the event of high vibrations, displacement or wildlife disturbance. In general, coarse and angular sands are ideal for this purpose.
Generally, a wide range of anticipated environmental conditions must be evaluated and planned for in relation to the soil topography of the area where the pipeline is to be installed. Physical constraints such as maximum external loads and minimum internal pressure must also be evaluated. The soil/pipe system must offer sufficient stability to resist all of these factors, deformation, or even collapse.