What will happen if the welding temperature of PE pipe is too high?

PE pipes have been widely used in water supply and drainage, gas transportation and other fields due to their excellent performance. As one of the main ways of connecting PE pipes, the quality of welding is directly related to the safe and stable operation of the entire pipeline system. During the welding process, temperature control is a crucial link. Many people may think that welding will be firmer if the temperature is higher, but this is not the case. As an AD pipe with rich experience in the field of PE pipes, today I will explain in detail how the welding temperature of PE pipes will be too high, and a series of adverse consequences that may be brought about.

First of all, the most direct impact of excessive welding temperature is that it will lead to the deterioration of the material of PE pipes. When the temperature of PE material is too high, its molecular chain will break, oxidize and decompose, which will significantly reduce the physical and mechanical properties of the pipe itself, such as tensile strength, impact toughness, and resistance to slow crack growth. This is like when we overheat a piece of plastic, it will become fragile and fragile. The weld area of the welded PE pipe should be the "strengthening point" of the connection. If the material is deteriorated due to excessive temperature, it will become the "weak link" of the entire pipeline system. In the subsequent use process, it is very easy to crack and leak here, which seriously affects the service life and safety of the pipeline. AD Pipe has strict control over the selection of raw materials and production process of PE pipe to ensure that the pipe itself has excellent performance, but this also requires the correct welding process to cooperate in order to exert its best efficiency.

Secondly, too high welding temperature will have a negative impact on the welding quality, resulting in various defects in the weld. When the temperature is too high, PE melt will melt excessively, and under the action of welding pressure, too much overflow may be generated, resulting in a reduction in the effective welding area at the welding joint. At the same time, high temperature may also carbonize the material at the welding interface and cause scorch. This not only affects the appearance quality of the weld, but more importantly, it will destroy the molecular fusion of the welding interface, resulting in reduced weld bonding strength and poor sealing. When such welds are subjected to internal pressure or external loads, they are prone to leakage or even rupture, leaving serious safety hazards for the project. Especially in some gas transportation or chemical fluid transportation projects with extremely high requirements for sealing, the consequences of such problems are unimaginable.

Furthermore, excessive welding temperature may also affect the smooth progress of welding operations and construction efficiency. Excessive melting of PE materials can cause extremely poor fluidity or become sticky due to carbonization, which will cause inconvenience to the welder's operation and make it difficult to accurately control the welding process. Sometimes it will also produce pungent odors and fumes due to excessive temperature, which will affect the construction environment and the health of operators. In addition, rework treatment is required after welding defects occur, which will undoubtedly increase the construction cost, prolong the construction period, and reduce the overall construction efficiency.

In addition, from an economic point of view, the quality problems of the welding joint caused by excessive welding temperature not only require rework and waste of manpower and material resources. Once a failure occurs during use, the direct losses such as water and gas outages, as well as the indirect losses and maintenance costs that may be caused will be huge. Therefore, strictly controlling the welding temperature of PE pipes, which seems to be a simple operation detail, is actually related to the quality, safety and economy of the entire project.

To sum up, excessive welding temperature of PE pipes is no small matter. It will bring adverse effects from many aspects such as material performance, welding quality, construction operation and even economic cost. Therefore, when welding PE pipes, it is necessary to operate in strict accordance with the welding process parameters of PE pipes (including welding temperature, heating time, welding pressure, cooling down, etc.). Operators should undergo professional training, be familiar with the characteristics of the PE pipes used and the operating procedures of the supporting welding equipment, and use qualified welding equipment for construction. AD Pipe usually provides detailed welding process guidance for different specifications and grades of PE pipes. It is recommended that the construction unit must pay attention to it and strictly implement it. Only in this way can we ensure the quality of the welded joints of PE pipes and ensure the safe, stable and long-term operation of the entire pipeline system. Choosing high-quality AD PE pipes and cooperating with the correct welding process is a reliable guarantee for the quality of your project.