Generally speaking, the electric welding machine uses a hot melt machine to weld pipes, which is fast and low in cost, and is suitable for pe water supply pipes and pe gas pipes. The electric fusion welding of the electric fusion welding machine, that is, the hot fusion connection of the polyethylene piping system, includes hot fusion butt joint and hot fusion socket connection.
The hot-melt socket connection is suitable for pipes and fittings with a relatively small diameter, because the pipes and fittings with small diameters have thinner walls and smaller cross-sections, and the quality of the butt joints is not easy. Hot-melt butt joints are suitable for pipe fittings with relatively large diameters. Compared with socket connections, they use less materials and are easier to manufacture. Because the oxidized surface layer is cut off before welding, the welding pressure can be controlled and the quality is easier. From the perspective of development trends, the use of thermal welding is the mainstream.
Tests prove that pipe fittings made of different grades of special polyethylene pipe materials can be connected by hot melt. However, because the domestically produced polyethylene pipe fittings often use materials that are not fully compliant with the standard pipe special materials, it is recommended to go through tests and inspections before using different brands and batches of polyethylene pipe fittings for hot-melt connection.
The process and equipment of the hot-melt connection of the polyethylene piping system are relatively simple, but in order to further ensure the quality, the quality of the hot-melt connection is still to be inspected by ultrasonic.
The main reason for the stable quality of hot melt connection is to strictly abide by the prescribed operating procedures. It is recommended that polyethylene pipe and fittings manufacturers should formulate detailed operating procedures suitable for their own pipes and fittings through tests and inspections according to relevant specifications. And through training and consultation to help the constructor to master the operating procedures.
