When using pipes, it is easy to appear the phenomenon of thermal expansion and cold contraction, especially for pipes made of PPR material, which seems to be a very difficult problem, but it can be solved by taking corresponding methods, but many people do not understand it PPR water pipe What are the solutions to the expansion and contraction of PPR water pipes? below Home piping Let's talk about it.

1. Reinforce the pipe with semi-circular metal plate

When it is difficult to use the free arm compensation method for the large diameter closed riser set in the pipeline well, the galvanized iron plate with a thickness of 1.0-2.0mm can be used to process the semicircular metal support plate with the same inner arc diameter as the outer diameter of the pipeline, cover it on the side of the pipeline against the wall, and use the fixed pipe clamp to connect the support plate with the pipeline and then fix it on the wall.

2. Method of compensation with free arm

In the open laying and non direct buried concealed laying pipelines, the free arm compensation method should be used to solve the thermal expansion and cold contraction deformation of the pipeline, that is, to give the space and space for free expansion and contraction of the pipeline. Generally, the pipeline is arranged in L and Z shapes and configured with appropriate fixed and movable supports to achieve compensation.

3. Take thermal insulation measures

PPR water pipes should be concealed, especially the pipes directly buried in the wall, floor and ground soil, to reduce the change of ambient temperature, so as to reduce the expansion of PPR water pipes.

4. Shielding measures should be taken for outdoor exposed pipelines

PPR water pipes should not be installed outdoors in the open, especially on the roof. When the outdoor temperature difference between day and night exceeds 20 ℃, the expansion rate of PPR water pipes can reach 4.6mm/m. If it is necessary to install the pipes outdoors in the open, shielding measures should be taken, such as adding PVC or other sleeves, wrapping a layer of adhesive tape, setting with water mud or adding metal protective covers.

5. Use dense pipe clamps to restrain the deformation of water pipes

The principle of this method is that the pipe is artificially divided into several parts by using a fixed pipe clamp to shorten the free section of the PPR pipe and fix it firmly.

6. Reasonable use of supports and hangers

7. Compensating pipeline deformation with metal compensator

In addition, on the Pipe installation Soft gaskets, such as rubber and plastic, shall be filled at the clamping position between the pipe and the supports and hangers to prevent damage to the pipe.