The acronym "HDPE" stands for "high density polyethylene." The substance is used in bags, bottles and other household products, as well as in piping systems. HDPE is known for its tensile strength and ability to withstand high temperatures.
According to BusinessDictionary.com, HDPE is a dense and economical hydrocarbon-plastic that offers a moisture barrier and chemical resistance. These properties make it useful in bags and containers. HDPE is formed from ethylene and petroleum using a catalytic process. According to the India Times, HDPE's chemical resistance properties, plus its ability to be easily molded and welded together, make it valuable for use in India's piping systems. HDPE-based piping systems can carry and transport safe-to-drink water and hazardous waste.