Joint pipe refers to bending the strip or plate into circular, square and other shapes and then welding to the surface joint pipe. A blank board or strip is used for the joint pipe.


With the advancement of high quality steel rolling and the rapid development of welding and inspection technology, the quality of weld seam has been continuously improved, the variety and specification of pipe joints have been increasing, and seamless steel tubes have been replaced in more and more fields. The cost of joint pipe is lower than that of seamless steel pipe, and the production efficiency is higher.


According to the different welding methods, it can be divided into arc welded pipe, high frequency or low frequency resistance welded pipe, gas pipe, furnace pipe, Bondi pipe.
Seam shapes can be classified into longitudinal and spiral welded pipes.
It can be divided into common welded pipes, galvanized pipes, oxygen blowing pipes, wire sleeves, metric pipes, drum pipes, deep well pump pipes, automobile pipes, pressure converter pipes, welded thin-walled pipes, welded special-shaped pipes and spiral welded pipes.
According to shape, the ends are divided into circular tubes and special-shaped (square, flat, etc.) tubes.