Polyethylene water supply pipe

Also known as pe water supply pipe, pe plastic pipe and Dongguan pe pipe.

Origin: Dongguan, Guangdong

Raw material: HDPE (high density polyethylene)

Manufacturer: Guangdong Haicheng Pipe Industry Technology Co., Ltd.

Product introduction:

? PE pipe is extruded from HDPE, which is widely used in the field of water supply pipeline manufacturing because of its high strength, corrosion resistance and non-toxicity. PE pipe will not rust, and it is an ideal pipe to replace ordinary iron water supply pipes. The plastic pipes in China have developed rapidly and their quality has been continuously improved. Among them, PE pipe is widely used in building water supply, building drainage, buried drainage pipeline, building heating, gas transmission pipeline, electrical and telecommunications protection sleeve, industrial pipeline, agricultural pipeline and so on because of its unique advantages. Mainly used for urban water supply, urban gas supply and farmland irrigation.

Polyethylene water supply pipes shall meet the national product standards: GB/T13663.1-2017, GB/T 13663.2-20 18 "Polyethylene Piping System for Water Supply Part 2: Pipes".

Product features:

? Performance characteristics of polyethylene water supply pipe;

1, excellent physical properties: good flexibility, torsion resistance, excellent impact resistance, strong earthquake resistance, wear resistance and impact strength better than that of metal pipe, and can be used in the range of -20℃-+40℃.

2. Simple installation and reliable connection: the strength of the interface is higher than that of the pipe body, and there is no leakage, so it is called integrated pipeline.

3. Convenient construction performance: light weight, the density is only one eighth of that of steel, the welding process is simple, the construction speed is fast, and the excavation amount is small. Compared with metal pipes, the project cost is reduced by one third.

? 4. Wear resistance and corrosion resistance: the inner wall is smooth, the friction coefficient is small, the wear resistance is four times that of steel pipe, and it is resistant to various chemical media.

? 5. Large conveying flow: Smooth pipe wall can improve the medium flow rate and increase the flow rate. Compared with the same metal tube, it can deliver more flow and save power consumption.

? 6. Good sanitary performance: sanitary, non-toxic, scale-free and aseptic. It is the best pipeline for drinking water.

Product specifications:

Comparative analysis of water supply engineering pipelines

The water conveyance channel of water conservancy project has a large flow, and the head of the channel crossing the ditch (pass) is mostly below 80m, which belongs to medium and low pressure head. Inverted siphon is often used to transport water when the water head permits. In the design of pipeline materials, steel pipes and prestressed reinforced concrete pipes are mainly selected. Prestressed reinforced concrete pipes can't meet the water-saving requirements because of their high friction, high transportation cost, heavy weight and inconvenient installation and maintenance, especially the large water leakage at the joints, and will be gradually eliminated. At present, small-diameter PE pipes are widely used in water conservancy projects, and the use of high-density large-diameter PE pipes in water conservancy projects is also growing rapidly. According to the practical experience of pipe selection and operation in China's long-distance water transmission project, steel pipe (SP) and high-density polyethylene water supply pipe (pe) are selected for preliminary analysis and comparison.

1 steel pipe (SP)

The biggest advantages of steel pipe are high strength, high working pressure resistance, convenient construction and laying, flexible interface form and less pipeline leakage. It is very suitable for sections with good geological conditions, complex terrain conditions, high working pressure resistance and crossing various obstacles. However, its disadvantage is that the price is relatively high, and the inner and outer walls of the pipeline need anti-corrosion treatment, which will be used for urban domestic water supply, and there are unfavorable factors for secondary pollution of water quality.

2 High density polyethylene water supply pipe (pe)

High density polyethylene (HDPE)PE water supply pipe is a new type of water supply pipe developed in China in recent years, and it has been widely used as an urban water supply pipe. Its advantages are good air tightness, long service life, corrosion resistance, light weight, smooth inner wall of the pipeline, small water head and water loss, non-toxic materials, safety and hygiene; It has good strength, rigidity, elasticity and toughness, can effectively bear the required internal pressure and external load, has high strength of pipeline joints, is safe and reliable in water supply, and is convenient to maintain; Used for urban domestic water supply, no secondary water pollution; It can also be laid and used in corrosive soil, earthquake-prone areas, often frozen areas and mountainous and swamp areas. At present, the pipeline selected from the commonly used pipe diameters is relatively low in cost, adaptable to the change of in-situ stress, convenient in construction and short in construction period. Its disadvantage is that the ability of the pipeline to withstand internal pressure is slightly smaller. According to "Polyethylene (PE) Pipe for Water Supply" (GB/T 13663 -20 18), the pipe diameters of PE 100 grade pipes are all less than dn630, and the selected working internal pressure is not more than 1.6MPa. When the pipe diameters are between DN 630 and DN, When the pipe diameter is greater than dn800, the selected internal pressure shall not exceed 1.0MPa.

Application of PE water supply pipe in adverse geological conditions

Based on the performance advantages of pe pipe, this paper introduces the selection and application of PE pipe under adverse geological conditions (such as debris flow ditch, corrosive soil, frozen area, landslide, etc.). ).

Excellent physical properties of 1

PE water supply pipe has good strength, flexibility and creep resistance, its elongation at break exceeds 500%, and its bending radius can be as small as 1/20 ~ 1/25 of the pipe diameter, so it is easy to move, bend and insert when laying. Large-diameter PE pipeline adopts hot-melt butt joint, and the joint strength is higher than that of the pipeline itself, which is beneficial to pipeline installation, and the axial load of welded joint does not leak or detach. Therefore, when laying a pipeline, it does not need to be "anchored" at the joints and bends, nor does it need the supporting structure of the pipe body, so it can be directly buried in a uniform soil layer. The most important advantage is that the pipeline will not break due to soil movement or live load. Therefore, it has irreplaceable advantages when used in adverse geological conditions such as mudslides and landslides.

2 Corrosion resistance and long service life.

Except for a few strong oxidants, PE pipe can resist the corrosion of many chemical media; No electrochemical corrosion. In southern China, the groundwater level is high and the land humidity is high. When using steel pipes, it is necessary to carry out anti-corrosion and external tempering treatment, and the service life is only 30 years. PE pipe can resist the corrosion of various chemical media and does not need anti-corrosion treatment. In addition, it will not promote the growth of algae, bacteria or fungi, and its service life is as long as 50 years. Therefore, PE pipe is very suitable for use in corrosive soil and bad geology.

3. Good earthquake resistance and impact resistance.

PE water supply pipe has low notch sensitivity, high shear strength, uneven scratch resistance, outstanding environmental stress resistance and extremely low low temperature and low brittleness temperature. Heavy objects directly press through the pipeline, which will not cause the pipeline to break; In the process of use, it has strong adaptability to the pipeline foundation, and the pipeline foundation is not easy to be damaged when it is uneven and misplaced. It can be seen that PE pipe has low requirements for foundation bearing capacity. Compared with steel pipes and concrete pipes, it can save a lot of expenses for fixing pipes, and the pipe body only needs to be buried to a certain depth.

4? Good construction performance

PE water supply pipe is light, easy to carry, easy to weld and few welded joints. When the pipeline is long, the coiled pipe can be used for laying, and the requirements of the pipe trench are much lower than those of the steel pipe trench. Moreover, when the construction conditions are limited, it can be welded by electrofusion. In addition, the immersed tube method can greatly reduce the construction difficulty and engineering cost. Therefore, the application of PE pipe in water conservancy projects with inconvenient transportation in mountainous areas is also superior to other pipes.