PE is called Polyethylene. It is the simplest polymer organic compound. It is the most widely used polymer material in the world. It is made of ethylene. It is divided into high density polyethylene, medium density polyethylene and low density poly according to density. Ethylene. Low-density polyethylene is soft and high-pressure polymerization is used; high-density polyethylene has the characteristics of rigidity, hardness and mechanical strength, and low-pressure polymerization is often used. High-density polyethylene can be used as a container, a pipe, or as a high-frequency electrical insulating material for radar and television.
Standard: Implement GB/T13663-2000 "Polyethylene (PE) pipe for water supply"; the sanitary performance of drinking water pipe meets the requirements of GB/T17219; it is produced with PE100 grade raw materials, generally used for pressure water transportation.
First, PE pipe features
1. Good hygienic performance: PE pipe processing does not add heavy metal salt stabilizer, the material is non-toxic, no fouling layer, no bacteria, and it solves the secondary pollution of urban drinking water.
2, excellent corrosion resistance: in addition to a few strong oxidants, can withstand the erosion of a variety of chemical media; no electrochemical corrosion.
3. Long service life: PE pipes can be safely used for more than 50 years under rated temperature and pressure conditions.
4, better impact resistance: PE pipe has good toughness, high impact strength, heavy weight directly pressed through the pipe, will not lead to pipe rupture.
5. Reliable connection performance: The strength of the PE tube hot melt or electrofusion interface is higher than that of the pipe body, and the joint will not be broken due to soil movement or live load.
6. Good construction performance: The pipeline is light in weight, the welding process is simple, the construction is convenient, and the comprehensive construction cost is low.
Second, the main purpose of PE pipe:
1. Town water supply:
PE pipe has the comprehensive advantages of safety, sanitation, convenient construction and long service life, and has become an ideal pipe for urban water supply.
2. Natural gas and gas transportation:
Due to the reliable connection, stable performance, easy construction and corrosion resistance of PE pipes, it is the best choice for medium and low pressure gas transmission pipelines.
3. Food and chemical industry:
PE pipes have unique corrosion resistance and can be used for the transport or discharge of various acid salt salts, resulting in long life, low cost and low maintenance costs.
4. Mineral sand and mud transportation:
PE pipes have a unique wear resistance of four times that of steel pipes, and can be widely used to transport ore, fly ash from power plants, mud dredging in rivers, etc.
5. Replace cement pipes, cast iron pipes and steel pipes:
For the old pipe re-election of cement pipes and cast iron pipes in the city, the PE pipe can be directly inserted into the old pipe for replacement without large-area excavation. The project cost is low and the construction time is short, which is especially suitable for the old city. Pipeline re-election.
6, landscaping pipe network:
Landscaping requires a large number of water pipelines, and PE pipelines are low in cost and worthy of promotion.
7. Municipal non-excavation works:
At present, with the development of the city, non-excavation technology is widely used in various constructions, and the pipe jacking (pulling pipe, traction pipe) commonly used in non-excavation factories is currently popular with PE pipe for its toughness and price. Advantages will be further developed in the field of non-excavation.
8. Sewage treatment:
At present, many sewage treatment plants use PE pipes in addition to cement pipes and HDPE double-wall corrugated pipes. In actual construction, PE pipes have the same caliber flow rate as other pipes, and in complex environments such as turning, crossing, etc. Among them, its convenience is more prominent.
9, power threading:
Due to the superior resistance and insulation performance of the PE pipe, and its own high pressure resistance and pulling force, it is often used in many power threading constructions.
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