HDPE Water Pipes

Meeting the challenges of the 21st century Piping made from polyethylene is a cost effective solution for a broad range of piping problems in municipal, industrial, marine ,mining, landfill, duct and agricultural applications. It has been tested and proven effective for above ground, surface, buried, sliplined, floating, and sub-surface marine applications.

High-density polyethylene pipe (HDPE) can carry potable water, wastewater, slurries, chemicals, hazardous wastes, and compressed gases.

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In fact, polyethylene pipe has a long and distinguished history of service to the gas, oil, mining and other industries. It has the lowest repair frequency per mile of pipe per year compared with all other pressure pipe materials used for urban gas distribution.

Polyethylene is strong, extremely tough and very durable. Whether you're looking for long service, trouble-free installation, flexibility, resistance to chemicals or a myriad of other features, high-density polyethylene pipe will meet all your requirements.

HIGH DENSITY POLYETHYLENE - HDPE - IS A VERY POPULAR MATERIAL FOR WATER PIPES. IT IS

  • RESISTANT TO CHEMICALS
  • EASY AND LIGHT WEIGHTED
  • LONG LIVING
  • LOW FRICTION
  • RELATIVELY CHEAP
  • FLEXIBLE
  • SUN RESISTANT
Polyethylene’s are divided into 3 groups
according to their densities as
(LDPE)
Low Density
(MDPE)
Medium Density
(HDPE)

High Density

PRESSURE NOMINAL -PN

PE pipes can be used in range of temperatures -40oC to 60oC considering the change of operating pressure. Typically the standard specification identify class of a HDPE pipe is by the nominal pressure class - PN - up to PN 20 or 20 bar. HDPE pipe can also be classified by the material used - PE 100, PE 80, PE63, PE 40 or PE 32.

The following table shows the operating conditions related to pressure and temperature as a basis for pipe and pipe connections. These figures refer to potable water installations based on a theoretical life of 50 years.

PN 2.5
max pressure 2.5 bar
PN 4
max pressure 4 bar
PN 6
max pressure 6 bar
PN 10
max pressure 10 bar
PN 16
max pressure 16 bar
1 bar = 105 Pa (N/m2) = 0.1 N/mm2 = 10.20 m H2O = 0.9869 atm = 14.50 psi (lb f/in2) = 106 dyn/cm2 = 750 mm Hg
Designation of material
PE 100
PE 80
PE 63
PE 40
PE 32
MRS at 50 year sand 20°C Mpa (bar)
10 (100)
8 (80)
6.3 (63)
4 (40)
3.2 (32)
The minimum Required Strength - MRS - according ISO 4427 for the different materials are:

 

CLASSED BY MATERIALS

Polythylene pipes are also classified by the type of material used:

PE 32
low pressure piping systems
PE 40
low pressure piping systems
PE 63
medium pressure piping systems irrigation system - drinking water connections
PE 80
gas pipe for natural gas distribution network with pressure rate up to 4 bars -drinking water pipe with pressure rate up to 16 bar - sewers, outfall pipes, industrial pipes
PE 100
high demands piping applications

 

KAWSAR WATER HDPE

STANDARDS

DIN 8074 & 8075

ISO 4427 & 4437
ASTM D2447 & F2160
ASTM D2239
ASTM D2737
ASTM D3035
ASTM D2513
PS 3580
 

 

ADVANTAGES REDUCED INSTALLATION COSTS

Lower life cycle costs

  • Corrosion resistance. Does not rust, rotor corrode.
  • Leak tight. Heat-fused joints create a homogenous, monolithic system. The fusion joint is stronger than the pipe.
  • Excellent water hammer characteristics. Designed to with stand surge events.
  • High strain allowance. Virtually eliminates breakage due to freezing pipes.
  • Additional cost savings are achieved by lower instance of repairs.
  • With no exfiltration or infiltration, potable water losses and groundwater nuisance treatment costs encountered in traditional piping systems are eliminated.
  • Material of choice for. Used in directional boring, plowing, river crossings, pipe bursting and slip lining.
  • Fewer fittings due to pipe flexibility. Allowable bending radius of 20 to 25 times outside diameter of pipe.
  • Lighter equipment required for handling and installation
    than with metallic materials.
  • Eliminates the need for thrust blocking. Heat fused joints are fully restrained.
  • Light weight and longer lengths allow for significant savings in labor and equipment.

 

LEAK FREE

Polyethylene pipe is normally joined by heat fusion. Butt, socket, sidewall fusion and Electro fusion create a joint that is as strong as he pipe itself, and is virtually leak free. This unique joining method produces significant cost reductions compared to other materials.

CORROSION, ABRASION , AND CHEMICAL RESISTANT

Polyethylene piping's performance in mining, dredging and similar applications proves it will outwear many more costly piping materials when conveying a variety of abrasive slurries. HDPE has excellent corrosion resistance and is virtually inert.

It does not need expensive maintenance or cathodic protection. It offers 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” naturally occurring soils. It has good resistance to many organic substances, such as solvents and fuels.

EXCELLENT FLOW CHARACTERISTICS

Because polyethylene is smoother than steel, cast iron, ductile iron, or concrete, a smaller PE pipe can carry an equivalent volumetric flow rate at the same pressure.

It has 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 excellent hydraulic characteristics throughout the pipe service life.

LIGHTWEIGHT AND FLEXIBLE

Polyethylene pipe is produced in straight lengths or in coils. Made from materials about one-eighth the density of steel, it is lightweight and does not require the use of heavy lifting equipment for installation. It reduces the need for fittings, is excellent in shifting soils and performs well in earthquake-prone areas. HDPE resists the effects of freezing and allows bending without the need for an excessive number of fittings. Since HDPE is not a brittle material, it can be installed with bends over uneven terrain easily in continuous lengths without additional welds or couplings

DUCTILITY AND TOUGHNESS

Polyethylene pipe and fittings are inherently tough, resilient and resistant to damage caused by external loads, vibrations, and from pressure surges such as water hammer. Even in cold weather polyethylene pipe is tolerant to handling and bending.

MINERAL BUILD-UP RESISTANCE

KAWSAR HDPE resists scaling and internal deposits. Chlorine Resistance HDPE exceeds the requirements of ASTM F876 for chlorine resistance, when tested in accordance with ASTM F2023.

FREEZE RESISTANCE

Unlike HDPE and copper pipes, Kawsar HDPE PIPES will not split when frozen, if allowed to expand along its entire length. It will return to its original shape when thawed. In addition HDPE will freeze at a slower rate than copper due to its significantly lower (four orders of magnitude) coefficient of thermal conductivity.

1. Thawing can be performed by using available hot water injection equipment. After thawing, HDPE can immediately be put back into service.

2. Thawing can also be performed by applying hot air to the pipe. When using a hot air gun to heat frozen areas, ensure that the temperature of the pipe does not exceed 210°F (93.3°C). Do not use an open flame to thaw Kawsar HDPE pipes.

HIGH IMPACT RESISTANCE

Kawsar HDPE is more flexible than other piping materials, and will not crush, kink or collapse when proper backfill techniques are used. Kawsar also has high resistance to gouges or scratches and outstanding resistance to slow crack growth.

HDPE PIPE– EARTHQUAKE SIMULATION TESTED

In addition to being tested during actual earthquakes throughout the US, Canada and the globe, Cornell University researchers simulated, on April 6, 2006, an earthquake's effects on gas and water polyethylene (PE) pipes by exerting a 120,000-pound force on a 16-inch diameter, 35-foot-long pipe - the largest test of ground rupture effects that has ever been performed in a lab.

The PE pipe, buried three feet below the surface, did not break during the test, but the sand shifted, bulged and cracked and created webbed lines on the surface as the pipe bent. During real life catastrophes PE pipe can be expected to perform well, while other pipe materials will be far more susceptible to breakage and lapse of service

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