Polyethylene piping’s performance in mining, dredging and other applications proves it is going to outwear much more costly piping materials when conveying various abrasive slurries. HDPE has excellent corrosion resistance which is virtually inert. It can do not require expensive maintenance or cathodic protection. It provides better overall resistance to corrosive acids, bases and salts than most piping materials. Moreover, polyethylene is unaffected by bacteria, fungi and also the most “aggressive” naturally occurring soils. It offers good potential to deal with many organic substances, such as solvents and fuels.
Because polyethylene is smoother than steel, cast iron, ductile iron, or concrete, Multilayer pipe can transport 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 the wonderful hydraulic characteristics through the entire pipe service life.
Polyethylene pipe is created in straight lengths or maybe in coils. Created from materials about one-eighth the density of steel, it really is lightweight and fails to require the use 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 impact of freezing and allows bending without making use of an excessive variety of fittings. Since HDPE will not be 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 against damage caused by external loads, vibrations, and from pressure surges such as water hammer. In freezing weather polyethylene pipe is tolerant to handling and bending.
Polyethylene pipe can be purchased in an array of diameters and wall thickness, with flanges, elbows, tees, wyes, and valves, providing an overall total system solution. HDPE pipe can also be for sale in Iron Pipe Size (IPS), Ductile Pipe Size (DIPS) along with metric sizes. Plastic Pipe Institute members are able to provide pipe, fittings as well as other appurtenances.
Polyethylene pipe is offered with color coding by application as produced by the utility location and coordination council in the American Public Works Association (APWA).
Included in its sewer rehab project, the town of Baytown, Texas, elected to use 36-inch HDPE pipe to switch 36-inch Reinforced Concrete Pipe (RCP) sewer lines. To burst over 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 in order to avoid the major impact of bypass pumping and reduced flow capacity involved. Sliplining HDPE butt fusion fittings rescues Colorado highway When a area of corrugated metal pipe culvert rusted and washed out, a busy Colorado highway was partially closed to traffic.
The Colorado Department of Transportation acted quickly to line the culvert with polyethylene pipe. Its lightweight and sturdiness were perfect for the project’s high elevation and isolated location. The line pipe was inserted from your uphill side of the culvert and pulled into position, then your joints were
assembled. Filling the annular void space between the existing Corrugated Metal Pipe (CMP) and also the liner pipe with grout was challenging, but successful. The liner and direct bury portions will be 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 water each day and threatening to turn off the metropolis ’s water supply. Complicating factors included temperature of water that changed 30 degrees simply speaking time periods and steep slopes in the positioning 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 decide on HDPE pipe. Fourteen-inch Iron Pipe Size (IPS) DR-11 water pipe was installed over the 1,400-foot area of line extending on the steep slope on the flatland below.
The HDPE pipe solved the elevation and temperature of water problems, and allowed for rapid installation that avoided shutting off the city’s main water supply on an extended length of time. The fee for constructing long lengths of distribution piping deprives many r ural residents of safe 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 in 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 starting 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, along with 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 in 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 PEX-AL-PEX pipe that met the criteria for pullback, capacity to bend and to withstand the anxiety of horizontal directional drilling. Excavation and environmental impact were kept to a minimum, and the project was completed in a month, one-third some time necessary for the standard trench-digging operation, at the total cost of $2.4 million.
Since its founding in 1950, PPI has become the voice for the 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 the opportunity 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.