Everyone is familiar with water pipes, and drinking water in people's lives needs to be transported through pipes. However, the material of the water pipe is very important. Because the delivered water is usually used for drinking, there will be special requirements for the material of water pipes. The simplest requirement is environmental protection, pollution-free and harmless to human body. Ppr water pipe is the most commonly used drinking water pipe. However, the pipe can not be presented as a whole, and it is usually segmented and needs to be welded according to people's needs. Let's learn the welding skills of ppr water pipes.

Welding skills of ppr water pipe

1, cut the pipe with special scissors, and the incision should be smooth and burr-free.

2. Clean the welding parts of pipes and fittings to avoid the damage of sand and dust to the joint quality.

3. Assemble a fuser with a heating head matching the size of the welded pipe and heat it to 260℃.

4. Mark the welding depth on the pipeline with a marker pen.

5. At the same time, insert the pipes and fittings into the welder. Heat according to the specified time.

6. After heating, push the pipes and fittings vertically and keep them for more than 5 seconds. Don't push too hard to prevent bending.

Installation method of ppr water pipe welding structure

1, general requirements

(1) Installers should be familiar with the general performance of hot-melt plug-in PP-R (random polypropylene) pipes and master the basic operation points.

(2) The installer should be familiar with the design drawings and understand the structural layout of the building and its relationship with other types of work.

(3) Before construction, the materials, appearance and accessories shall be inspected, and it is forbidden to expose crosslinked polypropylene pipes to the sun for a long time.

(4) Casing shall be set at the place where the pipeline passes through the wall and plate, and the inner diameter of the casing shall be 20mm larger than the outer diameter of the pipeline, and the casing shall be filled with flexible incombustible materials.

(5) When the pipeline is buried underground or in a wall or plate, the water pressure test must be carried out first, and it can be buried or closed only after it is qualified.

2, piping points

(1) The pipe shall be cut with special scissors or ordinary hand saw. When cutting the pipe, the incision should be smooth. When shearing, the section should be perpendicular to the pipeline axis.

(2) Scrape an inclined plane on the outer surface of the pipe end. Before welding, it is best to clean the welding parts with alcohol and then dry them with clean cloth or paper. And draw the length to be welded on the pipe.

(3) Open the special welding machine and heat it to 260℃. When the control indicator light turns green, start welding.

(4) Put the pipes and pipe fittings to be connected into the welding head, and heat the outer surface of the pipes and the inner surface of the pipe fittings. Then, pull it out of the machine head at the same time, and quickly insert the heated end of the pipe into the heated fitting interface. Do not rotate the test tube when inserting, and let it cool for a few minutes after inserting. Heating time, cooling time and welding depth shall be as follows:

Note: If the ambient temperature is lower than 5℃, the heating time should be extended by 50%.

(5) After the welder is used, the nose must be cleaned for the next use. ? (6) Install the welded pipeline in place.

3, pipe, hanger installation

(1) The selection of pipe supports and hangers can be based on the site installation conditions, such as plastic pipe clips made by pipe manufacturers or steel supports and hangers on pages 55-16/kloc-0, 48 and 49 of the national general water supply and drainage standard atlas. During installation, a layer of soft rubber sheet with a thickness of 1mm shall be placed between the pipe clamp and the pipe of the steel hanger.

The welding of water pipes is not as easy as we thought. The joint should be made perfect, otherwise it will leak easily and the water pipe will burst in winter. Therefore, welding needs some patience and care. After the water pipes are welded, they need to be installed. There are certain steps in the installation work, which we all need to learn and then operate according to the actual situation. We should not only learn relevant theoretical knowledge, but also use ppr water pipes for practical operation.

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