Polyethylene piping’s performance in mining, dredging and similar applications proves it would outwear a lot more costly piping materials when conveying many different abrasive slurries. HDPE has excellent corrosion resistance and it is virtually inert. It can do not need expensive maintenance or cathodic protection. It offers better overall resistance to corrosive acids, bases and salts than most piping materials. Furthermore, polyethylene is unaffected by bacteria, fungi as well as the most “aggressive” naturally sourced soils. They have good resistance to many organic substances, like solvents and fuels.
Because polyethylene is smoother than steel, cast iron, ductile iron, or concrete, HDPE pipe fittings can hold an equivalent volumetric flow rate at the same pressure. It provides 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 during the entire pipe service life.
Polyethylene pipe is created in straight lengths or perhaps in coils. Made out of materials about one-eighth the density of steel, it really is lightweight and will not require the usage of 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 results of freezing and allows bending without making use of an excessive amount of fittings. Since HDPE is not really a brittle material, it may 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 due to external loads, vibrations, and from pressure surges like water hammer. In cold temperatures polyethylene pipe is tolerant to handling and bending.
Polyethylene pipe is available 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 likewise obtainable in Iron Pipe Size (IPS), Ductile Pipe Size (DIPS) and also metric sizes. Plastic Pipe Institute members are able to provide pipe, fittings along with other appurtenances.
Polyethylene pipe can be obtained with color coding by application as produced by the utility location and coordination council of your American Public Works Association (APWA).
As part of its sewer rehab project, the area of Baytown, Texas, elected to utilize 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 to protect yourself from the major impact of bypass pumping and reduced flow capacity involved. Sliplining HDPE butt fusion fittings rescues Colorado highway When a portion of corrugated metal pipe culvert rusted and washed out, a busy Colorado highway was partially closed right down to traffic.
The Colorado Department of Transportation acted quickly to line the culvert with polyethylene pipe. Its light weight and durability were perfect 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 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 off the town ’s water supply. Complicating factors included temperature of water that changed 30 degrees to put it briefly periods of time and steep slopes in the position of the leak. Reducing the quantity of pipe joints down the slope and accommodating the temperature differential, together with elevation problems, convinced city officials to select HDPE pipe. Fourteen-inch Iron Pipe Size (IPS) DR-11 water pipe was installed over the 1,400-foot portion of line extending across the steep slope for 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 on an extended length 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 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 had not been within the standards for watermain materials, an assessment of your material and appropriate jointing methods determined HDPE pipe was flexible, immune 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 plenty 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 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, ability to bend and also to withstand the worries of horizontal directional drilling. Excavation and environmental impact were kept as low as possible, and also the project was carried out in 4 weeks, one-third some time necessary for the typical trench-digging operation, at the price tag 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 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.