HDPE High-Density Polyethylene Pipe Systems Meeting the challenges of the 21st century 2 Meeting the challenges of the 21st century Piping made from polyethylene is a cost-effective solution for a broad range of piping problems in municipal, industrial, marine, mining, landfill, duct and agricultural applications. It has been tested and proven effective for above ground, surface, buried, sliplined, floating, and sub-surface marine applications. High-density polyethylene pipe (HDPE) can carry potable water, wastewater, slurries, chemicals, hazardous wastes, and compressed gases. In fact, polyethylene pipe has a long and distinguished history of service to the gas, oil, mining and other industries. It has the lowest repair frequency per mile of pipe per year compared with all other pressure pipe materials used for urban gas distribution. Polyethylene is strong, extremely tough and very durable. Whether you’re looking for long service, trouble-free installation, flexibility, resistance to chemicals or a myriad of other features, high-density polyethylene pipe will meet all your requirements. Smooth-wall High-Density Polyethylene pipe systems HDPE 3 Lower life-cycle costs
❍ Corrosion resistance. Does not rust, rot or corrode.
❍ Leak tight. Heat-fused joints create a homogenous, monolithic system. The fusion joint is stronger than the pipe.
❍ Maintains optimum flow rates. Does not tuberculate, has a high resistance to scale or biological build-up. ❍ Excellent water hammer characteristics. Designed to withstand surge events.
❍ High strain allowance. Virtually eliminates breakage due to freezing pipes.
❍ Additional cost savings are achieved by lower instance of repairs.
❍ With no exfiltration or infiltration, potable water losses and groundwater nuisance treatment costs encountered in traditional piping systems are eliminated. Reduced installation costs
❍ Material of choice for trenchless technology. Used in directional boring, plowing, river crossings, pipe bursting and slip lining.
❍ Fewer fittings due to pipe flexibility. Allowable bending radius of 20 to 25 times outside diameter of pipe. ❍ Lighter equipment required for handling and installation than with metallic materials.
❍ Eliminates the need for thrust blocking. Heat fused joints are fully restrained.
❍ Lightweight and longer lengths allow for significant savings in labor and equipment. HDPE PIPE SAVES BOTH TIME AND MONEY 4 ❍ LEAK FREE. Polyethylene pipe is normally joined by heat fusion. Butt, socket, sidewall fusion and electrofusion create a joint that is as strong as the pipe itself, and is virtually leak free. This unique joining method produces significant cost reductions compared to other materials.
❍ CORROSION, ABRASION, AND CHEMICAL RESISTANT. Polyethylene piping’s performance in mining, dredging and similar applications proves it will outwear many more costly piping materials when conveying a variety of abrasive slurries. HDPE has excellent corrosion resistance and is virtually inert. It does not need expensive maintenance or cathodic protection. It offers better overall resistance to corrosive acids, bases and salts than most piping materials. In addition, polyethylene is unaffected by bacteria, fungi and the most “aggressive” naturally occurring soils. It has good resistance to many organic substances, such as solvents and fuels.
❍ EXCELLENT FLOW CHARACTERISTICS. Because polyethylene is smoother than steel, cast iron, ductile iron, or concrete, a smaller PE pipe can carry an equivalent volumetric flow rate at the same pressure. It has less drag and a lower tendency for turbulence at high flow. Its superior chemical resistance and “non-stick” surface combine to almost eliminate scaling and pitting and preserve the excellent hydraulic characteristics throughout the pipe service life.
❍ LIGHTWEIGHT AND FLEXIBLE. Polyethylene pipe is produced in straight lengths or in coils. Made from materials about one-eighth the density of steel, it is lightweight and does not require the use of heavy lifting equipment for installation. It reduces the need for fittings, is excellent in shifting soils and performs well in earthquake-prone areas. HDPE resists the effects of freezing and allows bending without the need for an excessive number of fittings. Since HDPE is not a brittle material, it can be installed with bends over uneven terrain easily in continuous lengths without additional welds or couplings. Consider the following features of HDPE pipe: 5
❍ DUCTILITY AND TOUGHNESS. Polyethylene pipe and fittings are inherently tough, resilient and resistant to damage caused by external loads, vibrations, and from pressure surges such as water hammer. Even in cold weather polyethylene pipe is tolerant to handling and bending.
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