Steel pipes are classified according to connection mode

   According to the connection method of the pipe end, the steel pipe can be divided into: plain pipe (pipe end without thread) and wire pipe (pipe end with thread). Turning wire pipe is divided into: ordinary turning wire pipe and pipe end thickened turning wire pipe. Thickening wire pipe can also be divided into: external thickening (with external thread), internal thickening (with internal thread) and internal and external thickening (with internal and external thread) and other places. If the thread type can also be divided into: ordinary cylindrical or taper thread and special thread and so on. In addition, according to the needs of users, the wire pipe is generally equipped with pipe fittings delivery.