What is an HDPE pipe?

HDPE is a polyethylene thermoplastic that is made from petroleum. It is the most widely used of the three polyethylene resins, with a density ranging from 0.93 to 0.97g/cm3 or 970kg/m3. Despite only having a slightly higher density than low-density polyethylene (LDPE), HDPE has a greater tensile strength. This is due to the fact that it has a low degree of branching, meaning that linear molecules pack better together and the difference in strength exceeds that of the difference in density.

Thus, when HDPE is melted and molded into a pipe, the end product is strong, durable, flexible and lightweight. When fused together, the different sections of piping offer a zero-leak rate and are more environmentally sustainable than other types of piping, due to being non-toxic, corrosion and chemical resistant, long lasting and suitable for trenchless installation methods.

A telling sign of its popularity is the number of industries making use of HDPE piping, including:

  • Civil engineering (for water mains, service pipes, sewer-reticulation systems and cables in electrical installations);
  • Building and construction (in cold-water reticulation systems and house connections, as well as ducting for air-conditioning and refrigeration);
  • Agriculture (irrigation in water-supply schemes and suction lines, plus for drainage and irrigation applications);
  • Industrial (for domestic sewage systems and sanitary systems, plus the safe conveyance of chemicals or potable water);
  • Mining (in both surface and underground operations and slurries); and lastly
  • Marine/aquaculture (for supply lines and floats, and to facilitate trenchless technology).

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