Characteristics and performance of Shandong PE conduit

Characteristics and performance of Shandong PE conduit

■ Electric welding: special electric welding machine is used to connect straight pipes with straight pipes and straight pipes with pipe fittings. Generally, it is used for pipes below 160mm.

■ Hot melt butt connection: special butt welding machine pipes are used for connection, generally used for pipes above 160mm.
■ Steel plastic connection: flange, thread thread and other methods can be used for connection.
■ Corresponding tools shall also be prepared to facilitate construction and ensure construction quality.
■ Good sanitary performance: PE pipes are processed without adding heavy metal salt stabilizer, with harmless materials, no scaling layer, and no bacteria, which solves the secondary pollution of urban drinking water.
■ Superior corrosion resistance: except for a few strong oxidants, it can resist the corrosion of various chemical media; No electrochemical corrosion.
■ Long service life: Under rated temperature and pressure conditions, PE pipes can be safely used for more than 50 years.
■ Good impact resistance: PE pipe has good toughness and high impact strength, and the heavy objects directly press the pipe, which will not cause the pipe to be broken.
■ Reliable connection performance: the strength of PE pipe hot-melt or electrofusion interface is higher than the pipe body, and the joint will not be disconnected due to soil movement or live load.
■ Good construction performance: the pipeline is light, the welding process is simple, the construction is convenient, and the comprehensive cost of the project is low.

(1) Reliable connection: polyethylene pipe systems are connected by electrothermal melting, and the strength of the joint is higher than the strength of the pipe body.
⑵ Good low-temperature impact resistance: the low-temperature embrittlement temperature of polyethylene is extremely low, and it can be safely used within the temperature range of - 60-60 ℃. During winter construction, due to the good impact resistance of the material, no pipe embrittlement will occur.
⑶ Good resistance to stress cracking: HDPE has low notch sensitivity, high shear strength, good scratch resistance, and outstanding resistance to environmental stress cracking.
⑷ Good chemical corrosion resistance: HDPE pipes can resist the corrosion of various chemical media, and the chemical substances in the soil will not cause any degradation to the pipes. Polyethylene is an electrical insulator, so it will not rot, rust or electrochemical corrosion; In addition, it will not promote the growth of algae, bacteria or fungi.
(5) Aging resistance and long service life: polyethylene pipes containing 2-2.5% evenly distributed carbon black can be stored outdoors or used for 50 years without being damaged by ultraviolet radiation.
(6) Good abrasion resistance: the abrasion resistance comparison test of HDPE pipe and steel pipe shows that the abrasion resistance of HDPE pipe is 4 times that of steel pipe. In the field of slurry transportation, compared with steel pipes, HDPE pipes have better wear resistance, which means that HDPE pipes have longer service life and better economy.
(7) Good flexibility: the flexibility of HDPE pipe makes it easy to bend. In engineering, it can bypass obstacles by changing the pipeline direction. In many cases, the flexibility of the pipe can reduce the amount of pipe fittings and reduce the installation cost.
(8) Low water flow resistance: HDPE pipes have smooth internal surfaces, and their Manning coefficient is 0.009. The smooth performance and non adhesion characteristics ensure that HDPE pipes have higher transmission capacity than traditional pipes, and also reduce the pressure loss and water transmission energy consumption of the pipeline.
(9) Convenient handling: HDPE pipes are lighter than concrete pipes, galvanized pipes and steel pipes, which are easy to handle and install. Lower labor and equipment requirements mean that the installation cost of the project is greatly reduced.
(10) A variety of new construction methods: HDPE pipeline has a variety of construction technologies. In addition to the traditional excavation method, it can also use a variety of new non excavation technologies, such as pipe jacking, directional drilling, lining, pipe splitting, etc. This is a good choice for some places where excavation is not allowed, so HDPE pipeline is more widely used.