Butt welding connection. Suitable for connecting steel pipes with similar diameters, with high connection strength, but requiring high interface quality and strict requirements for operation and monitoring.
Socket welding connection. Cut one steel pipe into a certain length socket, and insert another steel pipe into this socket for welding. The connection is convenient, but the angle cannot exceed a certain angle.
Screw connection. Cutting threads at both ends of the steel pipe and connecting them through spiral tightening, suitable for small diameter pipes with lower connection strength.
Flange connection. Adding flanges at both ends of the steel pipe and tightening them with bolts is suitable for large-diameter steel pipes, with high connection strength and good stability, but high cost and long connection time.
Expansion type connection. By inserting one end of a steel pipe into another end and applying pressure to form a hinged fixation, it is suitable for small diameter steel pipes with limited connection diameter and relatively weak connection strength.
Circular seam welding connection. Make the pipe into a circular ring, then connect the two rings and weld them through the ring seam. It is suitable for connecting large-sized pipes, with tight connections and high strength.
Compression connection. Insert the piping into the pipe opening of the fitting, tighten it with a nut, and use spiral force to compress the sleeve at the pipe opening through a sealing ring, providing a sealing effect.
Compression type connection. Insert the piping into the pipe fittings, use specialized installation tools to press the pipe wall into a hexagonal shape, and the internal sealing ring also becomes a hexagonal shape, playing a sealing role.