Guangdong D&G Technology Group Co., Ltd. is a famous plastic pipe manufacturer in Guangdong Province, specializing in the production of plastic pipes for 30 years, with high-quality plastic pipes and competitive plastic pipe prices, accounting for a certain market share of plastic pipes. Let us introduce the HDPE plastic pipe.

HDPE (high density Polyethylene) pipe is currently supplied to China's municipal pipe market. Plastic pipes are developing steadily. PE pipes, PP-R pipes and UPVC plastic pipes all have a place. The strong development momentum of PE pipes is the most impressive. PE pipes are used in a wide range of fields. Water supply pipes and gas pipes are the two largest application markets.

The PE pipe for water supply is a replacement for the traditional steel pipe and polychloroic acid ethylene drinking water pipe.

The water supply pipe must withstand a certain pressure, usually a PE resin with a large molecular weight and good mechanical properties, such as HDPE resin. A good pipe 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 and corrosion resistance. Compared with traditional pipe, HDPE pipe system has the following one. Series advantages:

(1) Reliable connection: The polyethylene pipe system is connected by electric hot melt method, and the strength of the joint is higher than the strength of the pipe body.

(2) Good low temperature impact resistance: The low temperature embrittlement temperature of polyethylene is extremely low, and it can be safely used in the temperature range of -60-60 °C. In winter construction, due to the good impact resistance of the material, the tube will not be brittle.

(3) Good resistance to stress cracking: HDPE has low notch sensitivity, high shear strength and excellent scratch resistance, and environmental stress cracking resistance is also outstanding.

(4) Good chemical resistance: HDPE pipelines can withstand the corrosion of a variety of chemical media, and the chemicals present in the soil will not cause any degradation to the pipeline. Polyethylene is an electrical insulator and therefore does not rot, rust or electrochemically corrode; it also does not promote the growth of algae, bacteria or fungi.

(5) Anti-aging, long service life: Polyethylene pipes containing 2-2.5% of uniformly distributed carbon black can be stored or used outdoors for 50 years without being damaged by ultraviolet radiation.

(6) Good wear resistance: The comparison of wear resistance 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 transport, HDPE pipes have better wear resistance than steel pipes, which means HDPE pipes have a longer service life and better economy.

(7) Good flexibility: The flexibility of the HDPE pipe makes it easy to bend. The engineering can bypass the obstacle by changing the direction of the pipe. In many cases, the flexibility of the pipe can reduce the pipe usage and reduce the installation cost.

(8) Small water flow resistance: The 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 conventional pipes, while also reducing the pressure loss and water consumption of the pipe.

(9) Convenient handling: HDPE pipes are lighter than concrete pipes, galvanized pipes and steel pipes. They are easy to handle and install. The lower manpower and equipment requirements mean that the installation cost of the project is greatly reduced.

(10) A variety of new construction methods: HDPE pipelines have a variety of construction techniques, in addition to the traditional excavation methods, a variety of new non-excavation techniques such as pipe jacking, directional drilling, liners, Construction in the form of split pipes, etc., is the only option for some places that are not allowed to be excavated, so the application of HDPE pipes is more extensive.

For the construction of HDPE pipe, in addition to paying attention to the performance of HDPE pipe in the construction process, it is necessary to fully grasp the specific operation methods of the construction technology, and the relevant construction personnel need to further strengthen the mastery of this construction process. Therefore, the quality of the drainage project is effectively improved. Below, the author combines years of work experience to analyze the main construction links.

1. Pipe prefabrication

The first is the prefabrication of the pipeline. In this process, we need to pay attention to the following construction steps. Prepare the HDPE pipe in advance, heat it at both ends, and use the hot melt machine to mill both ends. The special milling cutter is the main one. After completing this step, the construction tool is placed on the bracket, and the bracket can be moved freely, mainly for the convenience of further construction of the project. In the process of docking the pipe end and the pipe end, it is necessary to ensure that Reduce the misalignment between the two, control the error within the range of 1mm, and place the tube end 90° vertically. The processing of the closed tube end should meet the requirement of not exceeding 0.3mm gap. For the distance measurement, the precision instrument is needed. The main purpose of this is to ensure that the quality of the drainage works is not affected, so that the quality of the project can be further improved. Under the premise of meeting the above requirements, subsequent construction can be carried out.

Place the hot plate with the temperature to meet the requirements, move the two end of the tube to close the hot plate and maintain a certain pressure through the pressurizing handle until a coil of molten material is formed around the end of the tube. When half of the wall thickness, quickly remove the hot plate, and then close the two ends, the switching time should be as short as possible, no more than 5s. The pressure is slowly pressed by the pressurizing handle and the closed tube end and maintained at a certain pressure value P. The pressure is maintained for a period of time T, and when the initially melted crimp is bonded and cooled and hardened, it means that the hot melt is completed.

2. Interface mode of HDPE pipe and connection method of HDPE pipe and inspection well

The commonly used HDPE pipe connection methods include butt welding connection, electric welded pipe hoop connecting piece connection, socket type bushing connection with sealing ring, threaded connection method, linear expansion socket tube connection and flange connection method. These connection methods have their own performance characteristics, and their installation methods are different. HDPE pipes cannot be connected to pipe fittings with a soluble binder. The best way to connect them is by fusion bonding.

Due to the different shrinkage of the material, the joint between the HDPE pipe and the brick mixing inspection well is prone to leakage. It is recommended to use a waterproof wing ring. After the waterproof wing ring is connected with the HDPE short pipe of different pipe diameters, it is directly cast into a block with cement mortar. When the inspection well is built, it can be directly built according to the bottom of the flow water, which saves time and effort. The interposer method can be used for the connection of the HDPE double-walled winding pipe to the inspection well.

3, pipe installation

Excavation and grooving should strictly control the elevation of the foundation and prohibit over-excavation. Undisturbed soil with a base design elevation of 0.2-0.3 m should be manually cleaned to the design elevation. If local over-excavation or disturbance occurs, the natural grade sandstone or medium and coarse sand with a particle size of 10-15mm can be replaced and compacted. The pipe foundation shall be laid according to the design requirements. The thickness of the foundation wool pad shall be not less than the following: 100mm below the pipe diameter 315 and 150mm below the pipe diameter. The interface part of the pipe foundation shall be reserved for the interface operation. The groove width is about 0.4-0.6 m, the groove depth is about 0.05-0.10 m, and the groove length is about 1.1 times the pipe diameter. After the groove is completed, the groove is filled with sand. The pipe is rubber ring or hot melt connection. When the pipe adopts the rubber ring interface, first check whether the rubber ring is in good condition, confirm the placement position of the rubber ring, and then clean the working surface in the interface range with cotton yarn, and there must be no dirt or other debris.

Guangdong Desu Technology Group Co., Ltd. is a famous plastic pipe manufacturer in Guangdong Province, specializing in the production of plastic pipes for 30 years, with high-quality plastic pipes and competitive plastic pipe prices, accounting for a certain market share of plastic pipes.

Welcome to buy the famous plastic pipe manufacturer in Guangdong Province, plastic pipe and plastic pipe fittings, plastic pipe and HDPE plastic pipe of Guangdong Desu Technology Group Co., Ltd.