Can the hot PE pipe be rotated?

In the installation and construction of PE pipes, hot melt connection is a key process to ensure the safe and stable operation of the piping system. Many construction personnel will encounter a common problem: can the PE pipe be rotated when hot melt connection is made? As an AD pipe with rich experience in the field of plastic pipes, here is a detailed analysis of the main points of this operation for you.

First of all, it is necessary to make it clear that the PE pipe has different requirements for "rotation" at different stages of hot melt connection.

Before the hot melt connection starts, that is, the preparation stage of pipes and pipe fittings, it is necessary to align and straighten the end faces of the PE pipes to be connected to ensure that the axes overlap. At this time, in order to achieve the best alignment effect, necessary, minor angle adjustment or rotation can be made. The purpose is to make the pipe and the welded surface of the pipe fitting completely fit and avoid misalignment. Slight rotation at this stage is to prepare for the subsequent welding quality and is allowed, but unnecessary large-scale rotation should be minimized.

When entering the formal heating stage, that is, when the PE pipe end is connected to the hot melt die for heating, it is absolutely forbidden to rotate the pipe or pipe fitting. The PE pipe of the AD pipe has a specific melting index and thermal stability. When heating, it is necessary to ensure that the welded surface is uniformly heated to form a uniform molten ring. If it rotates at this time, it will cause uneven heating, destroy the integrity and uniformity of the molten layer, and then affect the welding strength, which may lead to safety hazards such as leakage at the interface.

After the heating is completed, remove the PE pipe from the die head and quickly perform docking. During this "switching" process, the stability of the pipe should be maintained to avoid rotation caused by external force or its own weight. When docking, pressure should be applied smoothly and evenly along the axis direction, so that the two molten end faces are closely fitted. This process is also not allowed to rotate. Any rotation may cause the formed molten layer to be twisted and displaced, resulting in welding defects.

After the docking is completed, enter the pressure-holding cooling stage. During the entire cooling process, a stable molecular chain structure is being formed at the interface of the PE pipe. At this time, it is necessary to ensure that the pipe and pipe fittings are completely fixed, and any form of rotation or movement is strictly prohibited. Even a slight rotation may damage the welded joint that is being cooled and solidified, resulting in a decrease in the strength of the interface and affecting the pressure-bearing capacity and service life of the entire pipeline system.

AD Pipe reminds you that the quality of the hot-melt connection of the PE pipe is directly related to the quality of the entire pipeline project. Operating strictly in accordance with the specifications and grasping the key node of "whether it can be rotated" is the basis for ensuring that the welding is firm and the system is safe and durable. If you have any questions about the operating specifications, it is recommended to refer to the official construction guidelines provided by AD Pipeline or consult a professional technician to ensure that each welded joint meets the standards and allows the piping system to perform best in long-term use.