The pressure of new-type pipes, especially plastic pipe […]
The pressure of new-type pipes, especially plastic pipes, is related to many factors, such as pipe diameter, pipe wall thickness, operating temperature, pipe processing methods, and ways of connecting pipes to pipes. Among them, the way of connecting is very important. If PVDF pipes and pipes are not well connected, it will not only affect the service life of the pipe system, but also cause the pipe system to "run, run, drip, leak" and so on. Therefore, the connection method is an important content for installation and acceptance, and must be paid more attention.
The connection method of pipes and fittings. Due to the different types of pipes and fittings, the connection methods are also different. Even if they are connected by the same method, the operations are different in construction.
When the pipes and fittings made of the same thermoplastic material are connected to each other, a special hot-melt tool is used to heat the surface of the connection part, directly heat-melt and socket it, and connect it after cooling. Hot-melt connection is a thermal reaction process of top heating, heating, constant temperature, and cooling through the ports of pipes or fittings under specified temperature conditions in a specific model, so that the ends to be fused are fully, uniformly and regularly Ground and completely fusion technology. The pvdf tube is not a chemical reaction process, but a physical change process and its result.
Hot-melt connection method
(One) Direct hot-melt connection
It is to heat the joints and heat-weld them.
(Two) socket hot-melt connection
The socket-type hot-melt connection is to heat and soften the pipe insertion end and the socket end respectively, and then quickly insert people. After cooling, a relatively firm connection can be achieved. In order to increase the use pressure of the socket connection, the method shown in the first can also be used, and then a sleeve is added to the socket.
There are special tools for hot-melt connection, which are simple in design and low in cost. They can be used wherever 220V power is available, and the connection strength is relatively high.
(Three) fused connection
When the same thermoplastic pipe is connected, a special fused pipe is inserted, and the fused pipe is energized by the fused connection tool, and the required heat is generated by the resistance wire embedded in the fused pipe to perform welding. After cooling, the pipe and fused The fittings become a whole.
The PVDF pipe electrofusion connection is characterized by convenient and fast connection, good joint quality and low interference from external factors. Fused connections are generally used in places where installation is restricted and hot-melt connections are not possible. One of Kaixin Pipeline Technology Co., Ltd. is an imported KraussMaffei extrusion production line, which meets the production needs of all caliber products while ensuring the stability of product performance.