When construction workers usually carry out plastic pipe welding, certain types of welding seem to be relatively easy, but the actual situation is that when the welding worker does not have rich operating experience, pipes and other plastic welding failures may occur, because it is possible that he will skip some small details or not comply with the welding operation specifications, which can make many things go wrong.
In the meantime, novices can ignore this kind of defect. In the future, there may be cracks, leaks... or any other unpredictable problems in the welding.
Today, we will tell you some of our common problems. We will explain the most common failures that occur during plastic pipe welding, and in this way, we can prevent them from intervening our work in the future.
The first thing to consider before you start welding or work is the material you want to weld:
Check carefully whether the material you have is thermally stable (this material cannot be welded) or whether it is a thermoplastic.
Before plastic pipe welding, we must understand the material of the pipe, as well as the temperature, etc. Our common materials are polyethylene (HDPE), polypropylene (PP). Once we understand this point and the knowledge about the material we want to weld, we will yield twice the result with half the effort!
For plastic pipe welding, the following factors must be considered:
Welding method: We must use fusion welding method, prepare the material to be welded and the workpiece to be welded.
To use the most commonly used plastic pipe fusion welding machine to weld plastic pipes, you must also consider the following points:
Time: Fusion and cooling time must be well calculated. And processes must always be completed through the operation specification and welding instructions.
Temperature: Thermoplastics have a significant melting temperature. If you use a relatively low temperature, it cannot reach the melting point. If the temperature is high, thermal stress will be generated, which will destroy the plastic.
Pressure: If the pressure of the plastic is too high or too low when we are welding, you will not be able to weld well because the molecules of the plastic will not be involved.
Are there more points to check? If you follow all the previous steps, you will be able to grasp the key points more easily. But there are some external factors that will cause your welding to not proceed so smoothly.
Where we want to perform welding: When welding indoors, the temperature of the welding equipment will not change. But when you work outdoors, especially in winter, low temperature (in some cases may be -0℃) will directly change the temperature of the plastic pipe fusion welding machine.
Weather conditions: If the joint is wet during the welding process, there will be bubbles in the welding, which is why we must protect the plastic we want to weld from rain or bad weather.
Contamination: Grease, oxides, dust, sand...all of these make it difficult to weld plastic pipes, and they can destroy the weld. The unique way to avoid these is to clean and prepare the surface we want to weld first.