Polyethylene piping’s performance in mining, dredging and other applications proves it would outwear much 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 provides better overall potential to deal with corrosive acids, bases and salts than most piping materials. Moreover, polyethylene is unaffected by bacteria, fungi along with 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 hold an equivalent volumetric flow rate in 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 wonderful hydraulic characteristics through the pipe service life.
Polyethylene pipe is created in straight lengths or maybe in coils. Produced from materials about one-eighth the density of steel, it is actually lightweight and fails to require the use of heavy lifting equipment for installation. It cuts down on the requirement 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 quantity of fittings. Since HDPE is not 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 against 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 found in a variety of diameters and wall thickness, with flanges, elbows, tees, wyes, and valves, providing an overall system solution. HDPE pipe is additionally offered in Iron Pipe Size (IPS), Ductile Pipe Size (DIPS) in addition to metric sizes. Plastic Pipe Institute members can provide pipe, fittings and other appurtenances.
Polyethylene pipe can be obtained with color coding by application as created by the utility location and coordination council of the American Public Works Association (APWA).
Within its sewer rehab project, the city of Baytown, Texas, elected to utilize 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 avoid the main impact of bypass pumping and reduced flow capacity involved. Sliplining HDPE butt fusion fittings rescues Colorado highway Whenever a area of corrugated metal pipe culvert rusted and washed out, a lively Colorado highway was partially closed down to traffic.
The Colorado Department of Transportation acted quickly to line the culvert with polyethylene pipe. Its light weight and durability were ideal for the project’s high elevation and isolated location. The fishing line pipe was inserted in the uphill side in the culvert and pulled into position, then a joints were
assembled. Filling the annular void space involving the existing Corrugated Metal Pipe (CMP) as well as 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 of water per day and threatening to shut down the metropolis ’s water supply. Complicating factors included water temperature that changed 30 degrees simply speaking periods of time and steep slopes in the positioning of the leak. Reducing the volume of pipe joints down 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 over the 1,400-foot section of line extending within the steep slope to 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 for an extended time frame. The expense of constructing long lengths of distribution piping deprives many r ural residents of safe h2o. 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 was not inside the standards for watermain materials, an assessment from 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 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 in the 40s to transfer sewage and groundwater was rusting and corroding, along with inside sedimentary buildup that decreased its capacity significantly. Without replacing the complete sewage system, the most effective solution was 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, 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 as well as to withstand the anxiety of horizontal directional drilling. Excavation and environmental impact were kept to a minimum, and the project was finished in four weeks, one-third time essential for the typical trench-digging operation, in a sum total of $2.4 million.
Since its founding in 1950, PPI is 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 key 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.