The connection way of steel pipe can be divided into: light pipe (pipe end without thread) and wire tube (Guan Duan with thread).
The tube can be divided into ordinary tube and end tube.
Thickening of the tube can also be divided into: extra thick (with external thread), internal thickening (with internal thread) and inside and outside thickening (with internal and external thread) and other vehicle wire tube.
The wire tube can also be divided into ordinary cylinder or taper thread and special thread.
In addition, according to user needs, wire tubes are generally equipped with pipe delivery.