Polyethylene piping’s performance in mining, dredging and other applications proves it will outwear a lot more costly piping materials when conveying many different abrasive slurries. HDPE has excellent corrosion resistance which is virtually inert. It will not need expensive maintenance or cathodic protection. It provides better overall potential to deal with corrosive acids, bases and salts than most piping materials. In addition, polyethylene is unaffected by bacteria, fungi as well as the most “aggressive” naturally occurring soils. It has good potential to deal with many organic substances, like solvents and fuels.
Because polyethylene is smoother than steel, cast iron, ductile iron, or concrete, HDPE pipe fittings can hold an equivalent volumetric flow rate in the same pressure. It offers less drag plus 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 outstanding hydraulic characteristics throughout the pipe service life.
Polyethylene pipe is made in straight lengths or in coils. Produced from materials about one-eighth the density of steel, it really is lightweight and will not require the usage of heavy lifting equipment for installation. It reduces the need 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 just not a brittle material, it could 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 brought on by external loads, vibrations, and from pressure surges for example water hammer. Even just in cold temperatures polyethylene pipe is tolerant to handling and bending.
Polyethylene pipe can be purchased in a wide range of diameters and wall thickness, with flanges, elbows, tees, wyes, and valves, providing a total system solution. HDPE pipe is likewise offered in Iron Pipe Size (IPS), Ductile Pipe Size (DIPS) in addition to metric sizes. Plastic Pipe Institute members are able to provide pipe, fittings and also other appurtenances.
Polyethylene pipe is accessible with color coding by application as designed by the utility location and coordination council of the American Public Works Association (APWA).
Included in its sewer rehab project, the area of Baytown, Texas, elected to work with 36-inch HDPE pipe to exchange 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 major impact of bypass pumping and reduced flow capacity involved. Sliplining HDPE pipe fittings rescues Colorado highway Every time a part of corrugated metal pipe culvert rusted and washed out, a busy Colorado highway was partially closed right down to traffic.
The Colorado Department of Transportation acted quickly to line the culvert with polyethylene pipe. Its lightweight and durability were ideal for the project’s high elevation and isolated location. The line pipe was inserted through the uphill side in the culvert and pulled into position, then a joints were
assembled. Filling the annular void space between the 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 of water every day and threatening to shut down the metropolis ’s water supply. Complicating factors included temperature of water 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 along 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 down 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 off of the city’s main water supply on an extended time frame. 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 had not been inside 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 including 75mm to 200mm (3 inch to 8 inch) diameter. Using HDPE and chain trenching excavation, watermain installation costs were as low as $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 tons of raw sewage from dumping into San Francisco Bay. A pipeline constructed within the 40s to transfer sewage and groundwater was rusting and corroding, along with 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, 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, capability to bend and to withstand the anxiety of horizontal directional drilling. Excavation and environmental impact were kept to a minimum, and also the project was finished in a month, one-third some time essential for the standard trench-digging operation, in a price tag 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 a desire for educating industry about the key 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.