High Density Polyethylene Pipe (HDPE) Characteristics

HDPE - High Density Polyethylene pipe has a long service life. It has been used since the early 1950's. Life expectancy is approximately 50 years when transporting water. HDPE is used for a variety of industrial applications such as corrosive gases, fuel gases, water, and sewage. HDPE is very tough, ductile, leakproof, and is extremely difficult to puncture.

LIGHTWEIGHT - Polyethylene pipe is much lighter than concrete, cast iron, or steel pipe and it is easier to handle and install. The reduced manpower and equipment requirements of HDPE can result in significant installation savings. HDPE pipe will float even when full of water.

THERMAL CHARACTERISTICS - Polyethylene is a thermoplastic material. The characteristics of polyethylene pipe are established at ambient temperature (23°C, 73.4°F). The pipe will expand and contract as it is heated or cooled.

TEMPERATURE RANGE - As the temperature decreases HDPE pipe gains strength. The pipe maintains its flexibility and integrity to -180° F. HDPE pipe does not become brittle. Seasonal freeze/thaw conditions have little effect on HDPE.

ULTRAVIOLET PROTECTION - Black HDPE pipe, contains 2+% of carbon black. Carbon black is the most effective single additive to enhance the UV characteristics of plastic. HDPE can be safely located outside in most climates for many years without damage from UV exposure. Other UV stabilizers are not required when carbon black is used.

FUSION - HDPE pressure pipe is fusion/extrusion welded together and the weld is as strong as the original pipe. This makes HDPE structures monolithic or a one-piece, leakproof system. During the heat fusion process, temperatures of 375° - 500° F are used. Whitewater Docks pressure tests each dock for weld integrity prior to shipping.

OTHER CHARACTERISTICS - HDPE is non-toxic making it environmentally safe for sensitive marine environments. The smooth surface of the pipe limits biological growth. HDPE will not rot or rust.