Double Random Length pipe has any random size in the middle 11-13 meters. While pipes above 2 inches in diameter are possible in DRL size. Custom sizes are used to save welding price at the installation site.
The standard 300 mm safety distance used to place natural gas pipe away from sewage pipeline facilities needs to be abstracted to consider accidental damage and provide a safety buffer to the natural gas pipe.
Generally, Oedometer tests are performed by applying various loads to a soil sample and grading the deformation response. The results from these tests are used to predict how the soil in the field will deform in response to an advance in effective stress.
