Polyethylene piping’s performance in mining, dredging and other applications proves it is going to outwear many more costly piping materials when conveying a variety of abrasive slurries. HDPE has excellent corrosion resistance which is virtually inert. It can not require expensive maintenance or cathodic protection. It provides better overall resistance to corrosive acids, bases and salts than most piping materials. Furthermore, polyethylene is unaffected by bacteria, fungi and also the most “aggressive” naturally sourced soils. It offers good potential to deal with many organic substances, for example solvents and fuels.
Because polyethylene is smoother than steel, cast iron, ductile iron, or concrete, HDPE pipe can carry an equivalent volumetric flow rate on the same pressure. It has less drag as well as 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 throughout the pipe service life.
Polyethylene pipe is made in straight lengths or even in coils. Created from materials about one-eighth the density of steel, it is lightweight and is not going to require the use of heavy lifting equipment for installation. It cuts down on the demand for fittings, is e xcellent in shifting soils and performs well in earthquake-prone areas. HDPE resists the effects of freezing and allows bending without making use of an excessive quantity 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 to damage a result of external loads, vibrations, and from pressure surges such as water hammer. Even just in cold weather polyethylene pipe is tolerant to handling and bending.
Polyethylene pipe can be found in an array of diameters and wall thickness, with flanges, elbows, tees, wyes, and valves, providing an overall total system solution. HDPE pipe is also for sale in Iron Pipe Size (IPS), Ductile Pipe Size (DIPS) as well as metric sizes. Plastic Pipe Institute members can provide pipe, fittings as well as other appurtenances.
Polyethylene pipe is available with color coding by application as produced by the utility location and coordination council of your American Public Works Association (APWA).
Within its sewer rehab project, the area of Baytown, Texas, elected to work with 36-inch HDPE pipe to switch 36-inch Reinforced Concrete Pipe (RCP) sewer lines. To burst greater 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 protect yourself from the key 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, an active 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 sturdiness were ideal for the project’s high elevation and isolated location. The 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 in 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 road above it.
A deteriorating cast iron water main in Henryetta, Oklahoma was leaking 300,000 gallons water every day and threatening to shut down the area ’s water supply. Complicating factors included water temperature that changed 30 degrees in short time periods and steep slopes in the location of the leak. Reducing the number of pipe joints along 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 down the 1,400-foot part of line extending across the steep slope towards 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 for the extended time frame. The fee for 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 may save 66% over conventional water supply installations. Although high-density polyethylene pipe was not in the standards for watermain materials, an assessment of your 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 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 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 complete sewage system, the very best solution would be to install two new parallel polyethylene pipelines 15 feet below the foot of the canal. Laying the pipe involved complicated directional drilling in a vertical curve by using 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 Multilayer pipe that met the criteria for pullback, capacity to bend as well as withstand the worries of horizontal directional drilling. Excavation and environmental impact were kept to a minimum, as well as the project was carried out a month, one-third some time required for the typical trench-digging operation, in a price tag of $2.4 million.
Since its founding in 1950, PPI has become the voice for its members who take part in manufacturing and distributing polyethylene pipe systems. Members share a desire for educating industry about the advantages 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.