Polyethylene piping’s performance in mining, dredging and similar applications proves it would outwear more costly piping materials when conveying a number of abrasive slurries. HDPE has excellent corrosion resistance which is virtually inert. It does not need expensive maintenance or cathodic protection. It gives you better overall effectiveness against corrosive acids, bases and salts than most piping materials. Additionally, polyethylene is unaffected by bacteria, fungi and the most “aggressive” naturally sourced soils. It provides good effectiveness against many organic substances, like solvents and fuels.
Because polyethylene is smoother than steel, cast iron, ductile iron, or concrete, HDPE pipe can carry an equivalent volumetric flow rate in the same pressure. It offers less drag along with a lower tendency for turbulence at high flow. Its superior chemical resistance and “non-stick” surface combine to just about eliminate scaling and pitting and preserve outstanding hydraulic characteristics through the pipe service life.
Polyethylene pipe is produced in straight lengths or even in coils. Made from materials about one-eighth the density of steel, it really is lightweight and is not going to require the use of heavy lifting equipment for installation. It reduces the necessity 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 resorting to an excessive number of fittings. Since HDPE is not really a brittle material, it can 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 due to external loads, vibrations, and from pressure surges such as water hammer. Even just in freezing 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 also obtainable in Iron Pipe Size (IPS), Ductile Pipe Size (DIPS) in addition to metric sizes. Plastic Pipe Institute members can provide pipe, fittings and also other appurtenances.
Polyethylene pipe is offered with color coding by application as designed by the utility location and coordination council in the American Public Works Association (APWA).
Within its sewer rehab project, the town of Baytown, Texas, elected to utilize 36-inch HDPE pipe to change 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 avoid the main impact of bypass pumping and reduced flow capacity involved. Sliplining HDPE butt fusion fittings rescues Colorado highway Each time a portion of corrugated metal pipe culvert rusted and washed out, a hectic Colorado highway was partially closed down to traffic.
The Colorado Department of Transportation acted quickly to line the culvert with polyethylene pipe. Its very light and sturdiness were great for the project’s high elevation and isolated location. The fishing line pipe was inserted in the uphill side from the culvert and pulled into position, then the joints were
assembled. Filling the annular void space involving the existing Corrugated Metal Pipe (CMP) along with the liner pipe with grout was challenging, but successful. The liner and direct bury portions have been 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 each day and threatening to turn off the town ’s water supply. Complicating factors included temperature of water that changed 30 degrees to put it briefly time periods and steep slopes in the position of the leak. Reducing the number of pipe joints down the slope and accommodating the temperature differential, as well as elevation problems, convinced city officials to decide on HDPE pipe. Fourteen-inch Iron Pipe Size (IPS) DR-11 water pipe was installed across the 1,400-foot portion of line extending over the steep slope for the flatland below.
The HDPE pipe solved the elevation and temperature of water problems, and allowed for rapid installation that avoided shutting off of the city’s main water supply to have an extended period of time. The cost of constructing long lengths of distribution piping deprives many r ural residents of safe drinking water. Carlsbad Springs in Ontario, Canada studied a reliable – flow water supply technology and chain trencher installations method, discovering they could save 66% over conventional water supply installations. Although high-density polyethylene pipe was not in the standards for watermain materials, an assessment from the material and appropriate jointing methods determined HDPE pipe was flexible, immune to corrosion and smooth-walled. Carlsbad Springs installed approximately 33.5km (20.8mi.) of HDPE watermain including 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 a great deal 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 whole sewage system, the best solution ended up being to install two new parallel polyethylene pipelines 15 feet below the bottom of the canal. Laying the pipe involved complicated directional drilling at a vertical curve by using a 38dexspky of tight maneuvers, with a compound curve around private property, and without disturbing the nearby wetlands. The project utilized 16-inch SDR- 11 and 26-inch PEX-AL-PEX pipe that met the criteria for pullback, ability to bend as well as to withstand the stress of horizontal directional drilling. Excavation and environmental impact were kept to a minimum, and the project was completed in four weeks, one-third the time necessary for the normal trench-digging operation, at a sum total of $2.4 million.
Since its founding in 1950, PPI is the voice due to its members who take part in manufacturing and distributing polyethylene pipe systems. Members share a desire for educating industry about the benefits of HDPEm pipe, and broadening market opportunities 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.