Scraping for polypropylene pipes

11-04-2018
Instruments

Metal water pipes eventually become unusable for various reasons. If you decide to make repairs in the apartment and change them, it is best to use polypropylene products, the life of which exceeds 50 years. They can be reinforced with aluminum foil, therefore, for their high-quality welding, they use stripping.

How does the stripping for polypropylene pipes look like

Reinforced polypropylene pipes and their stripping

In this case, you have to remove some layer to a depth that is necessary for high-quality connection with the fitting. The edges at the same time should remain smooth and smooth.

Manual and automatic shavers are used - the first ones are suitable for one-time works, for example, at home, the second ones are used in industrial production (water supply networks in multi-storey buildings).

Below you will find out the answer to the question that newcomers often ask in this business. Why is a cleaning necessary for reinforced polypropylene pipes at all, if they have edges that are ideally even and smooth?

Automatic Rust Cleaning Machine

Reinforcement

Polypropylene pipes are products that have many advantages related to their manufacturing characteristics. The following should be noted:

Temperature Pipelines made of polypropylene have proven themselves in the supply of hot (up to 95? C) and cold water. Since the heating in an apartment building can hardly go beyond this mark, this cannot be considered a lack of products.
Coefficient of thermal expansion
  1. It is large enough to allow the material to compensate for its expansion at high temperature due to its flexibility. There are also situations when such displacement of pipes is undesirable, especially if they are laid under a layer of screed or plaster.
  2. Neutralize this feature can reinforcement of polypropylene water supply. After that, he is not afraid of high temperature fluctuations, he ceases to expand and deform.
External cleaning of the ends of pipes from polypropylene

Tip: Do not rely on reinforcement in cases where the water temperature will be 100? ะก and more. There is a big risk that at the points of connection with sewer fittings, polypropylene will begin to soften, while the water supply itself is unlikely to withstand the pressure.

Experts recommend the use of such pipes for water supply or heating of residential buildings, rather than manufacturing enterprises.

Reinforcement options:

  1. Fiberglass mesh is one of the best.. In this case, the product is five-layer:
    • 2 - polypropylene;
    • 3 - reinforcement.

    The middle layer at the same time represents a kind of mixture of two materials.

    1. Aluminum foil - it is most often found in such pipes. The thickness of the aluminum layer is 1-5 mm. It is placed outside, inside or in the middle of the product between the layers of plastic. Glue is used to connect the foil with polypropylene, the pipe can be perforated or solid.

    Tip: clean the reinforced part in this case from the place where you decided to weld the water supply elements.

    The machine for cleaning of a profile pipe from metal

    Stripping methods

    External The method is applied when the reinforcing foil interferes with the quality welding of plastic layers. In this case, use a special tool for stripping polypropylene pipes, which completely removes the outer layer with it to the depth of the diameter to put on a fitting or welding individual parts of the pipeline.
    Internal It is necessary to remove aluminum foil from inside the pipe so that the metal does not come into contact with water.

    Otherwise, this may cause the destruction of the entire reinforcement, namely:

    • pipe separation will occur;
    • decrease the strength of the connection;
    • Leaks may occur.

    If fiberglass mesh is used for reinforcement, they do not sweep it, because during melting it will not be in contact with the fittings, and it is not afraid of water.

    The price of such products is higher, but they are more preferable for work. In this case, you will have a more reliable connection, and no additional work will be required.

    Instruments

    The industry produces various types of them:

    • facer;
    • nozzles for drills, are used in unstressed mode, inserted into the cartridge. When working, care should be taken not to damage it;
    • manual stripping, equipped with removable or fixed handles, which increase comfort during operation.
    Special cleaning tools for polypropylene pipes

    Consider the process in more detail:

    1. Use a plain clutch with knives installed inside to clean the outer layer. The instruction is simple - put it on the end of the product and turn it with your hands. The cut will be smooth and smooth, and the operation itself takes only a few seconds.
    2. With the help of a flat-cutter, you will be able to remove the middle layer, since its blades are located from the inner end. The work is as follows:
      • put the end-cap on the end of the pipeline;
      • perform a few turns;
      • can start soldering.
      On a photo - a nozzle on a drill

      Nozzles for a drill will allow to remove the reinforced layer outside and inside. They should be put on in place of the bat, then carefully controlled while the foil layer is removed. Choose a nozzle according to the type of reinforcement.

      Conclusion

      From the article it became clear that stripping of polypropylene pipes with reinforcement is carried out to remove a thin layer of polypropylene and reinforcement during the preparatory work for welding. The material should be removed to the depth required to put on the fitting. (See also the article Sewage in the cottage: features.)

      Cleaning is performed with a special tool (manual or automatic), and the process takes only a few seconds. The video in this article will help you find additional information on this topic.

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