Polyethylene piping’s performance in mining, dredging and similar applications proves it can outwear many more costly piping materials when conveying a variety of abrasive slurries. HDPE has excellent corrosion resistance and it is virtually inert. It can do not want expensive maintenance or cathodic protection. It provides better overall resistance to corrosive acids, bases and salts than most piping materials. In addition, polyethylene is unaffected by bacteria, fungi and the most “aggressive” natural soils. It offers good effectiveness against many organic substances, such as solvents and fuels.
Because polyethylene is smoother than steel, cast iron, ductile iron, or concrete, HDPE pipe fittings can carry an equivalent volumetric flow rate at the same pressure. It provides 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 the superb hydraulic characteristics during the entire pipe service life.
Polyethylene pipe is manufactured in straight lengths or even in coils. Produced from materials about one-eighth the density of steel, it can be lightweight and fails to require the usage 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 results of freezing and allows bending without making use of an excessive amount of fittings. Since HDPE is not really 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 immune to damage brought on by external loads, vibrations, and from pressure surges including water hammer. Even 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 an overall total system solution. HDPE pipe is also for sale 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 is available with color coding by application as developed by the utility location and coordination council of your American Public Works Association (APWA).
Included in its sewer rehab project, the area of Baytown, Texas, elected to make use of 36-inch HDPE pipe to change 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 most important impact of bypass pumping and reduced flow capacity involved. Sliplining HDPE butt fusion fittings rescues Colorado highway Each time a area of corrugated metal pipe culvert rusted and washed out, a hectic Colorado highway was partially closed down to traffic.
The Colorado Department of Transportation acted quickly to line the culvert with polyethylene pipe. Its lightweight and durability were excellent for the project’s high elevation and isolated location. The fishing line pipe was inserted from the uphill side of the culvert and pulled into position, then the 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 are 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 daily and threatening to shut off the metropolis ’s water supply. Complicating factors included temperature of water that changed 30 degrees in a nutshell periods of time and steep slopes in the positioning of the leak. Reducing the number of pipe joints over the slope and accommodating the temperature differential, as well as 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 section of line extending within 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 of the city’s main water supply to have an extended length of time. The cost of constructing long lengths of distribution piping deprives many r ural residents of safe water. Carlsbad Springs in Ontario, Canada studied a stable – 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 from the standards for watermain materials, an assessment of your 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 lot of raw sewage from dumping into San Francisco Bay. A pipeline constructed from the 40s to transfer sewage and groundwater was rusting and corroding, and had inside sedimentary buildup that decreased its capacity significantly. Without replacing the full sewage system, the most effective solution would be 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 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 PEX-AL-PEX pipe that met the criteria for pullback, ability to bend and also to withstand the stress of horizontal directional drilling. Excavation and environmental impact were kept to a minimum, as well as the project was carried out four weeks, one-third the time required for the typical trench-digging operation, at a total cost of $2.4 million.
Since its founding in 1950, PPI continues to be the voice for the members who take part in manufacturing and distributing polyethylene pipe systems. Members share an interest in educating industry about the advantages 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.