When using
carbon seamless steel tubes, it is also necessary to pay attention to various connections of seamless steel tubes. When connecting
carbon steel tubes, pay attention to the connection method to ensure the improvement of efficiency. The commonly used connection methods for seamless tubes are as follows:
1. Compression type: Insert the pipe into the nozzle of the pipe fitting, fasten it with a nut, and compress the casing at the nozzle through the sealing ring with a screw force, which plays a sealing role and completes the connection of the pipe.
2. Welding type: The end of the pipe is beveled, and the pipe is welded in a ring shape by manual or automatic welding.
3. Flange type: The flange and the piping are welded by annular argon arc, and fastened with quick clamps or bolts, so that the gasket between the flanges can seal and complete the piping connection.
4. Compression type: insert the pipe into the pipe fitting and use a special installation tool to press the pipe wall into a hexagon, and the internal sealing ring is also deformed into a hexagon
5. Taper thread type: that is, the external thread and the piping are welded by annular argon arc, and the internal thread pipe fittings are connected by the taper thread to play a sealing role to complete the piping connection.
Extended information:
There are three ways for the connection of the pipe thread: the cylindrical inner thread is inserted into the cylindrical outer thread, the cylindrical inner thread is inserted into the conical outer thread, and the conical inner thread is inserted into the conical outer thread. Among them, the connection of the latter two methods is relatively tight and is a commonly used connection method.
(1) Flange flange connection. Flanging loose flanges are generally used for pipes of similar materials such as copper pipes, lead pipes, plastic pipes, etc. When flanging, different operation methods are selected according to different materials. The flanging requires smoothness without cracks and wrinkles.
(2) Threaded flange connection, which is connected with a flange with an internal thread and a steel pipe with an external thread. This flange is mostly made of cast iron and can be used for the connection of low-pressure pipelines.
(3) Welded flange connection, the flange and the steel pipe are connected by welding, this kind of flange connection is widely used. The welding method is: choose a pair of flanges and install them on the two connected pipe ends. If some equipment already has flanges, choose the flanges of the same specification to be placed in the waiting area, and spot weld a little first. Correct the verticality, and finally weld the flange to the pipe firmly.
