Polyethylene piping’s performance in mining, dredging and other applications proves it can outwear many more costly piping materials when conveying various abrasive slurries. HDPE has excellent corrosion resistance which is virtually inert. It will not have expensive maintenance or cathodic protection. It provides better overall resistance to corrosive acids, bases and salts than most piping materials. Furthermore, polyethylene is unaffected by bacteria, fungi and the most “aggressive” naturally occurring soils. It has good potential to deal with many organic substances, for example solvents and fuels.
Because polyethylene is smoother than steel, cast iron, ductile iron, or concrete, HDPE pipe fittings can have an equivalent volumetric flow rate with the same pressure. They have 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 superb hydraulic characteristics during the entire pipe service life.
Polyethylene pipe is made in straight lengths or perhaps in coils. Produced from materials about one-eighth the density of steel, it really is lightweight and fails to require using heavy lifting equipment for installation. It cuts down on the demand for fittings, is e xcellent in shifting soils and performs well in earthquake-prone areas. HDPE resists the consequences of freezing and allows bending without the need for an excessive number of fittings. Since HDPE is not really a brittle material, it might be installed with bends over uneven terrain easily in continuous lengths without additional welds or couplings.
Polyethylene pipe and fittings are inherently tough, resilient and resistant to damage caused by external loads, vibrations, and from pressure surges including water hammer. Even during cold weather polyethylene pipe is tolerant to handling and bending.
Polyethylene pipe comes in a variety of diameters and wall thickness, with flanges, elbows, tees, wyes, and valves, providing a total system solution. HDPE pipe is additionally available in Iron Pipe Size (IPS), Ductile Pipe Size (DIPS) as well as metric sizes. Plastic Pipe Institute members are able to provide pipe, fittings and other appurtenances.
Polyethylene pipe is offered with color coding by application as produced by the utility location and coordination council of the American Public Works Association (APWA).
As an element of its sewer rehab project, the area of Baytown, Texas, elected to work with 36-inch HDPE pipe to switch 36-inch Reinforced Concrete Pipe (RCP) sewer lines. To burst a lot more than 3700 feet of pipe in residential areas, the contractor used both static and pneumatic bursting systems. The pipe bursting method was recommended over three other procedures to prevent the main impact of bypass pumping and reduced flow capacity involved. Sliplining HDPE pipe fittings rescues Colorado highway Every time a area of corrugated metal pipe culvert rusted and washed out, an active Colorado highway was partially closed right down to traffic.
The Colorado Department of Transportation acted quickly to line the culvert with polyethylene pipe. Its very light and durability were perfect for the project’s high elevation and isolated location. The fishing line pipe was inserted from your uphill side of the culvert and pulled into position, then this joints were
assembled. Filling the annular void space between your existing Corrugated Metal Pipe (CMP) as well as the liner pipe with grout was challenging, but successful. The liner and direct bury portions happen to be in place, with flow restored and traffic running normally on the highway above it.
A deteriorating cast iron water main in Henryetta, Oklahoma was leaking 300,000 gallons water daily and threatening to turn off the metropolis ’s water supply. Complicating factors included water temperature that changed 30 degrees to put it briefly time periods and steep slopes in the location of the leak. Reducing the quantity of pipe joints over the slope and accommodating the temperature differential, along with elevation problems, convinced city officials to pick HDPE pipe. Fourteen-inch Iron Pipe Size (IPS) DR-11 water pipe was installed across the 1,400-foot portion of line extending across the steep slope on the flatland below.
The HDPE pipe solved the elevation and water temperature problems, and allowed for rapid installation that avoided shutting away from the city’s main water supply for an extended time frame. The expense of constructing long lengths of distribution piping deprives many r ural residents of safe water to drink. Carlsbad Springs in Ontario, Canada studied a reliable – flow water supply technology and chain trencher installations method, discovering they can save 66% over conventional water supply installations. Although high-density polyethylene pipe had not been from the standards for watermain materials, an assessment of the material and appropriate jointing methods determined HDPE pipe was flexible, proof against corrosion and smooth-walled. Carlsbad Springs installed approximately 33.5km (20.8mi.) of HDPE watermain ranging from 75mm to 200mm (3 inch to 8 inch) diameter. Using HDPE and chain trenching excavation, watermain installation costs were only $15 per foot for 6-inch diameter pipe.
A nightmare situation faced the San Rafael, California Sanitation District.Few challenging environmental demands can compare with preventing plenty of raw sewage from dumping into San Francisco Bay. A pipeline constructed inside the 40s to transfer sewage and groundwater was rusting and corroding, and had inside sedimentary buildup that decreased its capacity significantly. Without replacing the full sewage system, the best solution would be to install two new parallel polyethylene pipelines 15 feet below the bottom of the canal. Laying the pipe involved complicated directional drilling with a vertical curve with a 38dexspky of tight maneuvers, by using a compound curve around private property, and without disturbing the nearby wetlands. The project utilized 16-inch SDR- 11 and 26-inch MLCP Pipe that met the criteria for pullback, capability to bend and to withstand the anxiety of horizontal directional drilling. Excavation and environmental impact were kept as low as possible, and also the project was finished in 30 days, one-third some time necessary for the normal trench-digging operation, with a total cost of $2.4 million.
Since its founding in 1950, PPI has been the voice because of its members who take part in manufacturing and distributing polyethylene pipe systems. Members share an interest in educating industry about the benefits of HDPEm pipe, and broadening market possibilities to use polyethylene piping systems for water and gas distribution, sewer and wastewater, oil and gas production, industrial and mining uses, power and communication duct, and ir rigation.