Polyethylene piping’s performance in mining, dredging and similar applications proves it will outwear a lot more costly piping materials when conveying various abrasive slurries. HDPE has excellent corrosion resistance and it is virtually inert. It does not have expensive maintenance or cathodic protection. It gives you better overall potential to deal with corrosive acids, bases and salts than most piping materials. In addition, polyethylene is unaffected by bacteria, fungi and the most “aggressive” naturally occurring soils. They have good resistance to many organic substances, such as solvents and fuels.
Because polyethylene is smoother than steel, cast iron, ductile iron, or concrete, HDPE pipe can hold an equivalent volumetric flow rate with the same pressure. It has 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 made in straight lengths or maybe in coils. Made from materials about one-eighth the density of steel, it is actually lightweight and will not require using heavy lifting equipment for installation. It cuts down on 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 making use of an excessive number of fittings. Since HDPE is 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 proof against damage caused by external loads, vibrations, and from pressure surges including 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 can also be for sale in Iron Pipe Size (IPS), Ductile Pipe Size (DIPS) and also metric sizes. Plastic Pipe Institute members can provide pipe, fittings and also other appurtenances.
Polyethylene pipe is offered with color coding by application as developed by the utility location and coordination council of the American Public Works Association (APWA).
As an element of its sewer rehab project, the metropolis of Baytown, Texas, elected to use 36-inch HDPE pipe to change 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 butt fusion fittings rescues Colorado highway Whenever a part 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 sturdiness were perfect for the project’s high elevation and isolated location. The line pipe was inserted through the uphill side of the culvert and pulled into position, then a joints were
assembled. Filling the annular void space between the existing Corrugated Metal Pipe (CMP) along with 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 of water every day and threatening to shut down the town ’s water supply. Complicating factors included water temperature that changed 30 degrees in a nutshell 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, along with elevation problems, convinced city officials to pick HDPE pipe. Fourteen-inch Iron Pipe Size (IPS) DR-11 water pipe was installed over the 1,400-foot part of line extending within 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 the city’s main water supply for an extended period of time. The expense of constructing long lengths of distribution piping deprives many r ural residents of safe drinking water. Carlsbad Springs in Ontario, Canada studied a steady – flow water supply technology and chain trencher installations method, discovering they may save 66% over conventional water supply installations. Although high-density polyethylene pipe had not been within 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 which range 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 complete sewage system, the best solution was to install two new parallel polyethylene pipelines 15 feet below the bottom of the canal. Laying the pipe involved complicated directional drilling at a vertical curve using a 38dexspky of tight maneuvers, using a compound curve around private property, and without disturbing the nearby wetlands. The project utilized 16-inch SDR- 11 and 26-inch MLCP Pipe that met the criteria for pullback, capacity to bend as well as withstand the strain of horizontal directional drilling. Excavation and environmental impact were kept to a minimum, as well as the project was carried out in 30 days, one-third enough time required for the normal trench-digging operation, in a price tag of $2.4 million.
Since its founding in 1950, PPI is the voice for the members who take part in manufacturing and distributing polyethylene pipe systems. Members share a desire for educating industry about the key benefits of HDPEm pipe, and broadening market opportunities 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.