Little knowledge about PE pipes - Knowledge Energy Technology Co., Ltd

Teach you how to distinguish PE water supply pipe, PE gas pipe, PE oil pipeline

PE water supply pipes, PE gas pipes, and PE oil pipes are all types ofPE pipes. They are mainly processed from high-density polyethylene materials. The connection methods are also hot-melt connections. They are not only different in use, but also very different. Let's talk about the difference between them.

1. The color of the pipeline lines is different

Although these three kinds of PE pipes are mainly black, the line color of the outer wall of the pipe is different. PE water supply pipes are blue lines, PE gas pipes are yellow lines, and PE oil pipes are green lines.

2. The number of pipeline lines is different

The number of PE water supply pipes and PE gas pipes is four, while the oil pipelines are divided into single-layer pipes and casings. The single-layer pipes have two clusters of 4 green strips each; the casing has 6 Green strip.

3. The pipeline structure is different

PE water supply pipes and PE gas pipes are single-layer pipes, while PE oil pipes are divided into five layers and three layers, and there are three different structures, namely:

A. The inner layer of the double-layer oil pipeline in the gas station is EVOH oxygen barrier layer, the outer layer is PE or PEX layer, and the EVOH pipe with hot melt adhesive layer is between the two layers;

B. The inner layer is PE or PEX layer, the outer layer is EVOH oxygen barrier layer, and the EVOH tube with hot melt adhesive layer between the two layers;

C. The inner layer of the double-layer oil pipeline in the gas station is PE or PEX layer, the middle layer is EVOH oxygen barrier layer, the outer layer is covered with another layer of PE or PEX layer, and there is a layer of EVOH pipe with hot melt adhesive layer between the inner and outer layers.

4. Different calibers

There are more diameters of PE water supply pipes, 32mm, 40mm, 50mm, 63mm, 75mm, 90mm, 110mm, 125mm, 140mm, 160mm, 180mm, 200mm, 225mm, 280mm, 315mm, 355mm, 400mm, 500mm, 560mm, 630mm, 710mm , 800mm, 900mm, 1000mm, 1200mm.

The diameters of PE gas pipes are 20mm, 25mm, 32mm, 40mm, 50mm, 63mm, 75mm, 90mm, 110mm, 125mm, 140mm, 160mm, 180mm, 200mm, 225mm, 315mm, 355mm, 400mm, 500mm, 560mm, 630mm.

The sizes of PE oil pipelines are relatively small, such as 63mm, 75mm, 90mm and 110mm.

The general method of distinction is based on these basic conditions, which can be distinguished by color. If it is not possible, you can contact the manufacturers of PE water supply pipes, PE gas pipes, and PE oil pipelines, and they will help you choose from a professional perspective. You need tubing.

Welding method of PE pipe

PE pipe is a kind of polyethylene material processed and made. It not only has a special processing method, but also its welding method is more complicated, and there are many things to pay attention to.

But it can be seen that the amount of PE pipe used around us is relatively large, and it has indeed played a great role in many fields, so we have to master the welding technology of PE pipes. Today, I will share with you the welding method of PE pipes.

The basic method of PE pipe welding:

The common method of PE pipe welding is the method of hot-melt butt joint.

In this method, the two identical connection interfaces are first subjected to a certain thermal pretreatment, and then heated with a heating plate. Heating the interface and connecting the interface to a state of viscous flow is considered successful.

When the heating is successful, the heating plate is removed, and a certain pressure is quickly applied to the interface, so that the connected interface can be cooled and solidified well, so as to achieve the purpose of firm connection, and when the interface is completely solidified together, loosen it. The pressure plate is done.

Characteristics and application fields of PE pipes

PE polyethylene PE is a polyethylene plastic, which is a series of varieties of resins produced by a variety of processes, with a variety of structures and properties and a variety of uses. PE pipes include medium density polyethylene pipes and high density polyethylene pipes, which are divided into SDR11 and SDR17.6 series according to the wall thickness. The former is suitable for conveying gaseous artificial gas, natural gas and liquefied petroleum gas, while the latter is mainly used for conveying natural gas. Compared with steel pipes, the construction process is simple, and it has certain flexibility. More importantly, it is not used for anti-corrosion treatment, which will save a lot of processes. The disadvantage is that the equipment is not as good as the steel pipe. During the construction, special attention is paid to the safety distance of the thermal heating, and it cannot be exposed to the sun in the air, and it is sensitive to chemicals to prevent the leakage of the sewage pipe from causing damage.

Characteristics of PE pipes

1. Environmental protection and hygiene: no scaling, no bacteria breeding, which solves the secondary pollution of drinking water.

2. Good flexibility: good flexibility, high impact strength, high elongation at break, very strong adaptability to uneven settlement of the pipe base, and excellent seismic performance.

3. Simple construction: The construction process is simple, the system cost is low, the maintenance cost is low, and the project cost is greatly reduced.

4. Long service life: The service life is up to 50 years under normal conditions.

5. Convenient transportation: light weight, convenient transportation and installation.

6. Good flow rate: excellent wear resistance, extremely low friction coefficient of the pipe wall, and improved medium passing capacity.

7. Strong corrosion resistance: inert material, resistant to various chemical media erosion, no electrochemical corrosion.

8. Reliable interface: hot-melt butt and hot-melt plug technology make the interface strength higher than the pipe body, and the interface is safe and reliable.