Polyethylene piping’s performance in mining, dredging and other applications proves it will outwear a lot more costly piping materials when conveying a number of abrasive slurries. HDPE has excellent corrosion resistance and is also virtually inert. It can do not require expensive maintenance or cathodic protection. It provides better overall effectiveness against corrosive acids, bases and salts than most piping materials. Moreover, polyethylene is unaffected by bacteria, fungi and the most “aggressive” naturally occurring soils. They have good resistance to many organic substances, including solvents and fuels.
Because polyethylene is smoother than steel, cast iron, ductile iron, or concrete, Multilayer pipe can transport an equivalent volumetric flow rate at the same pressure. It offers less drag and 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 the wonderful hydraulic characteristics through the entire pipe service life.
Polyethylene pipe is produced in straight lengths or perhaps in coils. Created from materials about one-eighth the density of steel, it is actually lightweight and does not require using heavy lifting equipment for installation. It reduces the demand for fittings, is e xcellent in shifting soils and performs well in earthquake-prone areas. HDPE resists the impact of freezing and allows bending without the need for an excessive number of fittings. Since HDPE is not a brittle material, it may 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 against damage caused by external loads, vibrations, and from pressure surges for example water hammer. In cold weather polyethylene pipe is tolerant to handling and bending.
Polyethylene pipe can be found in a wide array of diameters and wall thickness, with flanges, elbows, tees, wyes, and valves, providing an overall total system solution. HDPE pipe can also be available in Iron Pipe Size (IPS), Ductile Pipe Size (DIPS) and also metric sizes. Plastic Pipe Institute members can provide pipe, fittings and other appurtenances.
Polyethylene pipe is available with color coding by application as developed by the utility location and coordination council of your American Public Works Association (APWA).
Within its sewer rehab project, the metropolis of Baytown, Texas, elected to work with 36-inch HDPE pipe to change 36-inch Reinforced Concrete Pipe (RCP) sewer lines. To burst 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 key impact of bypass pumping and reduced flow capacity involved. Sliplining HDPE butt fusion fittings rescues Colorado highway Every time a area of corrugated metal pipe culvert rusted and washed out, an active Colorado highway was partially closed to traffic.
The Colorado Department of Transportation acted quickly to line the culvert with polyethylene pipe. Its very light and sturdiness were excellent for the project’s high elevation and isolated location. The line pipe was inserted from the uphill side of the culvert and pulled into position, then the joints were
assembled. Filling the annular void space between your existing Corrugated Metal Pipe (CMP) and 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 road above it.
A deteriorating cast iron water main in Henryetta, Oklahoma was leaking 300,000 gallons of water per day and threatening to shut down the town ’s water supply. Complicating factors included water temperature that changed 30 degrees simply speaking time periods and steep slopes in the position of the leak. Reducing the quantity of pipe joints across the slope and accommodating the temperature differential, as well as elevation problems, convinced city officials to choose HDPE pipe. Fourteen-inch Iron Pipe Size (IPS) DR-11 water pipe was installed down the 1,400-foot section of line extending across the steep slope towards the flatland below.
The HDPE pipe solved the elevation and temperature of water problems, and allowed for rapid installation that avoided shutting from the city’s main water supply on 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 could save 66% over conventional water supply installations. Although high-density polyethylene pipe was not from the standards for watermain materials, an assessment of the material and appropriate jointing methods determined HDPE pipe was flexible, resistant to 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 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 full sewage system, the ideal solution ended up being to install two new parallel polyethylene pipelines 15 feet below the base of the canal. Laying the pipe involved complicated directional drilling in a vertical curve by using a 38dexspky of tight maneuvers, having 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, capacity to bend as well as to withstand the worries of horizontal directional drilling. Excavation and environmental impact were kept to a minimum, along with the project was carried out a month, 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 are involved in manufacturing and distributing polyethylene pipe systems. Members share an interest in educating industry about the benefits of HDPEm pipe, and broadening market chances 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.