1. <tbody id="qadtb"></tbody>
    <th id="qadtb"></th>

    1. <th id="qadtb"></th>

      Introduction of HDPE (high density polyethylene) water pipe

      2022-08-03 14:02:49

      Introduction of HDPE (high density polyethylene) water pipe

      Summary :

      HDPE pipe is a type of flexible plastic pipe used for fluid and gas transfer and is often used to replace ageing concrete or steel mains pipelines. Made from the thermoplastic HDPE (high-density polyethylene), its high level of impermeability and strong molecular bond make it suitable for high pressure pipelines. HDPE pipe is used across the globe for applications such as water mains, gas mains, sewer mains, slurry transfer lines, rural irrigation, fire system supply lines, electrical and communications conduit, and stormwater and drainage pipes.
      Plastic pipes are developing steadily, and PE pipes, PP-R pipes, and UPVC pipes all occupy a place. Among them, the strong development momentum of PE pipes is the most eye-catching. PE pipes are used in a wide range of fields. Among them, water supply pipes and gas pipes are its two largest application markets.

      PE resin is polymerized from the monomer ethylene. Due to the different polymerization reaction conditions such as pressure and temperature during polymerization, resins of different densities can be obtained, so there are high-density polyethylene, medium-density polyethylene and low-density polyethylene. points. When processing different types of PE pipes, according to their application conditions, different resin grades are selected, and the requirements for extruders and molds are also different.

      Internationally, the materials of polyethylene pipes are divided into five grades: PE32, PE40, PE63, PE80, and PE100, while the materials used for gas pipes and water supply pipes are mainly PE80 and PE100. There is no classification of special materials for polyethylene pipes in my country, which makes it difficult for domestic polyethylene gas pipe and water supply pipe manufacturers to choose raw materials, and also brings a lot of hidden dangers to the use of polyethylene pipes.

      Therefore, the National Bureau of Standards has made a lot of revisions in the new standard GB/T13663-2018, which stipulates that different grades of PE80 and PE100 for water supply pipes correspond to different pressure strengths, and removes the tensile strength performance in the old standard, and increases the fracture. Elongation (greater than 350%), which emphasizes basic toughness.

      Selection of water supply pipes

      The water supply pipe must bear a certain pressure, and usually PE resin with large molecular weight and good mechanical properties, such as HDPE resin, should be selected. LDPE resin has low tensile strength, resistance to pressure difference, poor rigidity, poor dimensional stability during molding and difficult connection, and is not suitable as a material for water supply pressure pipes. However, due to its high hygienic index, LDPE, especially LLDPE resin, has become a common material for the production of drinking water pipes. LDPE and LLDPE resins have low melt viscosity, good fluidity and easy processing, so the selection range of their melt index is also wide, usually MI is between 0.3-3g/10min.

      A good pipeline should not only have good economy, but also have a series of advantages such as stable and reliable interface, material impact resistance, crack resistance, aging resistance, corrosion resistance, etc. Compared with traditional pipes, HDPE pipe has the following advantages:

      Reliable connection

      The polyethylene piping systems are connected by electrothermal fusion, and the strength of the joint is higher than that of the pipe body.

      Good low temperature impact resistance

      The low temperature embrittlement temperature of polyethylene is extremely low, and it can be used safely in the temperature range of -60-60 °C. During construction in winter, due to the good impact resistance of the material, the pipe will not be brittle.

      good resistance to stress cracking

      HDPE has low notch sensitivity, high shear strength and excellent scratch resistance, and its resistance to environmental stress cracking is also outstanding.

      Good chemical corrosion resistance

      HDPE pipes are resistant to corrosion by various chemical media, and the chemicals present in the soil will not cause any degradation to the pipes. Polyethylene is an electrical insulator, so it does not rot, rust or electrochemically corrode; it also does not promote algae, bacterial or fungal growth.

      Aging resistance, long service life

      Polyethylene pipes containing 2-2.5% evenly distributed carbon black can be stored or used outdoors for 50 years without being damaged by UV radiation.

      Good wear resistance

      The wear resistance comparison test of HDPE pipe and steel pipe shows that the wear resistance of HDPE pipe is 4 times that of steel pipe. In the field of mud transportation, compared with steel pipes, HDPE pipes have better wear resistance, which means that HDPE pipes have longer service life and better economy.

      Good flexibility

      The flexibility of the HDPE pipe makes it easy to bend, and the engineering can bypass obstacles by changing the direction of the pipe. In many cases, the flexibility of the pipe can reduce the amount of pipe fittings and installation costs.

      Water flow resistance is small

      HDPE pipe has a smooth inner surface with a Manning coefficient of 0.009. The smooth performance and non-adhesive properties ensure that the HDPE pipe has a higher conveying capacity than traditional pipes, and also reduces the pressure loss of the pipeline and the energy consumption of water conveying.

      Easy to carry

      HDPE pipes are lighter than concrete pipes, galvanized pipes and steel pipes, it is easy to handle and install, and the lower manpower and equipment requirements mean that the installation cost of the project is greatly reduced.

      Various new construction methods

      HDPE pipelines have a variety of construction techniques. In addition to traditional excavation methods, various new trenchless techniques such as pipe jacking, directional drilling, lining pipes, and split pipes can be used for construction. For some places where excavation is not allowed, it is the only choice, so the application field of HDPE pipes is more extensive.

      How to distinguish between HDPE water supply pipe and HDPE drainage pipe?

      HDPE-Double-Wall-Corrugated-Pipe.jpg

      We know that PE water supply pipe and PE drainage pipe are difficult to distinguish which is water supply pipe and which is drainage pipe, so how to distinguish PE water supply pipe and PE drainage pipe in our daily procurement?

      First of all, from the price point of view, PE water supply pipe uses a new high-density polyethylene material, and the production cost is relatively higher than that of PE drainage pipe. Therefore, the price of PE water supply pipe is higher than that of PE drainage pipe of the same specification.

      Secondly, from the point of view of materials, PE water supply pipes transport tap water for people's daily life, so PE water supply pipes must meet the highest hygiene standards, and the production raw materials of PE water supply pipes must also use new high-quality products that meet national standards. Density polyethylene material, only in this way can ensure the safety and hygiene of water quality during transportation. PE drainage pipe is mainly used to discharge sewage, so the requirements will be lower. If the pipe material is allowed by the customer, a certain proportion of return material can be appropriately added to the PE drainage pipe for production, which does not affect the use.

      In addition, PE water supply pipes and PE drainage pipes can be distinguished from the pressure level;

      PE water supply pipes are used to transport tap water. Due to the needs of safe transportation, the pressure level of the pipes is relatively strict. The pressure levels of PE water supply pipes can generally be divided into 0.6Mpa, 0.8Mpa, 1.0Mpa, 1.25Mpa, 1.6Mpa, five Different grades can withstand 6kg pressure, 8kg pressure, 10kg pressure, 12.5kg pressure and 16kg pressure. The PE drainage pipe is mainly used to discharge sewage, and the pressure to be endured during the discharge process of the pipe is lower, so the sewage pipe generally chooses a lower pressure level, which will not affect the use effect of the pipe.

      Therefore, PE water supply pipes are higher than PE drainage pipes in terms of price, material and pressure level. When choosing, they can be selected according to different needs and different uses.


      Send a Message

      If you want to ask anything just fill in the form below and send us.

      // News //

      Our News

      HDPE water supply pipe or PPR water supply pipe?
      HDPE water supply pipe or PPR water supply pipe?

      09/06/2022

      With the development of the times, in the field of water supply and drainage, plastic pipes have gra...

      Why do we say that PPR pipe is the best choice for hot water pipe application?
      Why do we say that PPR pipe is the best choice for hot water pipe application?

      08/31/2022

      As one of the most commonly used pipes in modern home decoration, PPR water pipes are used by most p...

      How to choose the correct water supply pipe and drainage pipe
      How to choose the correct water supply pipe and drainage pipe

      08/24/2022

      With the continuous development and progress of science and technology, the replacement of pipes in ...

      The reason why the PE water supply pipe will burst
      The reason why the PE water supply pipe will burst

      08/19/2022

      Everyone knows that PE water supply pipes can be used for water delivery projects. Although the PE w...

      Preparation before construction of PE pipe trench
      Preparation before construction of PE pipe trench

      08/18/2022

      Before excavation, firstly grasp the condition of the underground pipeline along the pipeline surfac...

      6 Important Points about HDPE Gas Pipe
      6 Important Points about HDPE Gas Pipe

      08/17/2022

      HDPE gas pipe is a very common and widely used gas pipe. What important points do we need to pay att...

      // Our Products //

      New Products

      Plumber butt fusion welding tools 2in' to 4in' machine price list
      Plumber butt fusion welding tools 2in' to 4in' machine price list

      The manual butt fusion welding machine is used to weld the inner and outer ends of galvanized pipes....

      Plastic pipe hot melt welding equipment 63-160mm for India
      Plastic pipe hot melt welding equipment 63-160mm for India

      The manual butt fusion welding machine is used to fuse two pieces of plastic pipes. It can weld seam...

      Manual butt fusion welding machine for sale 2-4inch
      Manual butt fusion welding machine for sale 2-4inch

      The PE Butt Fusion Machine is an advanced electric butt welding machine with manually driven head wh...

      Automatic butt fusion hot melt machine for Arabia
      Automatic butt fusion hot melt machine for Arabia

      The butt fusion machine 630-800mm is a powerful welding equipment designed to weld and braze pipes, ...

      Plastic pipe butt fusion machine China for sale
      Plastic pipe butt fusion machine China for sale

      This butt fusion machine is equipped with continuous pressure circulation, pressure control and temp...

      Large Diameter Butt Fusion Welding Machine 630-800mm
      Large Diameter Butt Fusion Welding Machine 630-800mm

      The Butt Fusion machine 630-800mm has been designed with the perfect solution for butt fusion. The p...

      PPR welder socket fusion head price list
      PPR welder socket fusion head price list

      Plastic pipe welder with thermostat heating plate is used for socket butt fusion welding pipes and f...

      Socket fusion machine welding head Teflon material for sale
      Socket fusion machine welding head Teflon material for sale

      Socket fusion machine welding head is the ideal choice for your home and work. It's easy to use and ...

      A级毛片免费观看在线网站,A级毛片免费全部播放,免费A级毛片无码免费视频120S
      1. <tbody id="qadtb"></tbody>
        <th id="qadtb"></th>

        1. <th id="qadtb"></th>

          <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <蜘蛛词>| <文本链> <文本链> <文本链> <文本链> <文本链> <文本链>