Fusion steps of PE water supply pipe

Fusion steps of PE water supply pipe

PE water supply pipe is made of special polyethylene as raw material and extruded by a plastic extruder at one time. It is used in urban water supply pipe network, irrigation and water diversion projects and agricultural drip irrigation projects, especially for plastic pipes with  anti-corrosion environment. Because the PE pipe is connected by butt fusion and electrofusion, the integration of the socket and the pipe is completed, and it can reasonably resist the hoop stress and axial impact stress caused by the working pressure, and the PE pipe does not add heavy metal salt stabilizer. The material is non-toxic, does not scale, and does not grow germs, preventing secondary pollution of drinking water. The electric welding of PE water supply pipe can be divided into the following two steps. These two steps are very important and everyone must pay attention to it.

1. When the PE water supply pipe is welded by electric welding, center the center line of the two pipes, and fix the ends of the two pipes by spot welding.

2. To weld the PE water supply pipe and the flange sheet by electric welding, first insert the water supply pipe into the flange sheet. After spot welding, use a square ruler to align it. After leveling, the flange should be welded by electric welding on both sides. Highlight the closed face of the flange.

3. When the wall thickness of the PE water supply pipe is above 5mm, the groove should be laser cut to ensure sufficient penetration. The groove forming can be processed by gas welding laser cutting or beveling machine, but the slag and iron oxide should be eliminated, and it should be ground and polished with a file until the metal light is exposed.

4. When cutting the steel pipe, the saw section should be perpendicular to the center line of the pipe to ensure the concentricity of the end of the electric welding of the pipe.

5. The flange should bisect the center line of the PE pipe vertically, the surface layers should be parallel to each other, the flange gasket should not protrude into the pipe, the bolt specifications of the connecting flange should be matched with the flange, and the length of the raised nut of the screw should not exceed 1 of the diameter of the screw. /2.

6. When the water supply pipe is welded by electric welding, the pipe socket should eliminate rust, stains and vegetable grease.

7. Flange gaskets should be used in accordance with engineering drawings and standards, rubber pads for cold water systems and asbestos rubber pads for hot water systems.

The use environment of PE pipe

Because of its high compressive strength, corrosion resistance, non-toxicity and other characteristics, PE pipe has been widely used in pipe production and manufacturing. It is precisely because of its high-quality characteristics that the necessary requirements for the application environment are clearly put forward. The application environment can give full play to the ideal pipe effect. For the PE water supply pipeline in the usual soil section, just lay a layer of sand cushion on the base, and for the soft soil foundation, you need to lay a layer of gravel or gravel, and make it to the necessary thickness, and on the upper part A layer of sand cushion should be laid to reduce the harm of environmental factors to PE water supply pipes.

The above is a detailed introduction to the application environment of PE pipes. Each product is suitable for its own application environment. The same is true for PE water supply pipes. It has its own soil quality regulations. Easily destroyed and last longer.

Precautions for bonding PE water supply pipes in rainy days

When bonding PE water supply pipes, it is necessary to ensure that the bonding surface is dry and clean, and there is no sand and water stains. The corresponding drying time is also a prerequisite. However, there are corresponding disadvantages when bonding in rainy days. Let's talk about the problems that should be paid attention to when bonding PE water supply pipes in rainy days.

1. After cleaning and tidy, the adhesive surface of the PE water supply pipe will still have layers of damp water and moisture absorbed on the adhesive surface, which is difficult to ensure the dryness of the adhesive surface. The water inside floated up.

2. The bonded pipe immersed in water is equivalent to being in a fully enclosed situation, and its shear strength is reduced due to the dry solid evaporation standard.

3. If debris such as sediment, rainwater and other debris adheres to the surface of the pipe fittings, it will cause corresponding difficulties in the process of cleaning, chamfering, abrasive cloth roughening, etc., or I hope you will prevent this during the whole process of bonding. extreme weather.

After bonding, the bonding surface of the PE pipe is also very easy to be polluted by rainwater. Even with the maintenance of the umbrella, the harm is not very good. In general, we may choose suitable weather and place to bond PE water supply pipes.

Misunderstanding of the installation of PE water supply pipe

With the continuous increase of everyone's need to pursue a dream and a happy life, the use of PE water supply pipes has also been generally improved, and the installation regulations have gradually improved. In order to ensure the standard of the practical value of the pipe itself, what are the misconceptions about the wholesale installation of PE pipes in the fall?

After the newly installed PE water supply pipeline has been supplied with water for 3 months, cracking and water seepage often occur. After inspection, PE pipes and fittings are not supplied by the same manufacturer. A large number of products produced by the same manufacturer have inconsistent organic chemical properties, and many hot-melt joints have unstable bonding.

In autumn, a newly installed PE pipe cracked vertically immediately after the pressure test. After investigation, PE pipes are stored in the open air, and after a high temperature weather exposure, the performance of deterioration and brittleness reduces the quality decline.

At a PE pipeline renovation site, due to the hazards of rain and snow, freezing weather and spring transportation, the PE pipeline has not appeared for a long time. After the emergency repair of various types of PE pipes in stock, several joints continued to seep water, causing huge losses to construction companies and owners. Then I found out that the water seepage was caused by mixing with PE pipes of different manufacturers.

Due to the rainy and snowy weather, freezing weather and the hazards of the Spring Festival, the PE pipes were delayed in the renovation and reconstruction site of PE pipes, and various PE pipes in stock were used in an emergency. The owners suffered serious losses as a result. Later, it was found that the reason for the seepage was that PE pipes from different manufacturers were used interchangeably.

Some PE pipes newly installed in the fall cracked vertically immediately after entering the water. After investigating the open storage of PE pipes, the deterioration and brittleness of exposure to high temperature weather can reduce poor quality.