1. By function
It is divided into large and small heads, casing joints, reducing joints, 90° elbows, 45° elbows, three-way joints, reducing three-way joints, four-way joints, reducing four-way joints, and live joints (valve conversion joints) ), flanges, pipe clamps
2. According to the connection method
Divided into socket welding, threaded connection, flange connection
3. By material
Divided into copper, brass, bronze
4. By use
Water pipe joints, air conditioning pipe joints, refrigeration pipe joints, equipment joints, wire and cable joints
