Welding. Welding is a common way to connect steel pipes. The connection is achieved by heating the steel pipe interface to melt the welding rod and fuse it with the steel pipe. This connection method has the advantages of firm connection, good sealing, good durability, low cost, and no need for frequent maintenance.

Threaded connection. Threaded connection is also called threaded connection. It is made by machining threads on both ends of the steel pipe and connecting them with accessories such as threaded sleeves and gaskets. This connection method is suitable for steel pipes of different thicknesses and materials. It is simple to install and easy to maintain.

Flange connection. Flange connection is a method of installing flanges on both ends of the steel pipe and then fastening them together with bolts. This connection method is suitable for situations where the steel pipe needs to be disassembled and installed many times. It has the advantages of high strength, good sealing, and easy disassembly.

Socket connection. Socket connection is a connection method in which one pipe is inserted into the socket of another pipe and sealed by sealing materials or rubber rings. This connection method is suitable for small and medium diameter pipes.

Grooved clamp connection. Grooved clamp connection is a method of connecting by machining grooves on the steel pipe and then using clamps. This connection method is suitable for pipes with larger diameters, with fast installation and easy operation.

Choosing the appropriate connection method depends on factors such as the material, diameter, use environment, and whether the steel pipe needs to be disassembled frequently.