Maximum cover of 50 ft, with or without traffic, rail, or surcharge loading; minimum cover of at least one diameter or 18-in. Earth pressure applied to the pipe is determined using the prism load (geostatic soil stress). For the purpose of calculation, buried installations of PE pipe can be separated into four categories depending on the depth of cover, surface loading, ground water level, and pipe diameter, as follows: Standard Installation-Trench or Embankment. Some cables are designed specifically to be buried and have their own extra protection, such as steel. Underground cables are pulled in conduit that is buried underground, usually 1-1. What are the regulations and how to track the buried PE pipes? As the compressive strength of polyethylene pipe is lower than that of metal pipe, and it is more sensitive to temperature change, it must be deeply buried, avoid heating pipe, and minimize the. Eupen Pipe is producing PE and PVC pipes for the protection of cables and wires. They can be used in all areas of general construction and civil engineering, in road construction and also in the construction of tunnels and tracks. Our cable protection solutions offer excellent mechanical resistance. This guide explains the common cable constructions, when to choose direct-burial, a practical installation workflow, and the best practices that minimize downtime and future repair costs.