How To Carry Out Pipe End Machining

What is pipe end machining

Pipe end machining is that the process of pipe thread, sizing, thickening, strengthen the heat treatment, chamfering and other processes are carried out on the end of pipe. Each process is quite important for carrying out the pipe end machining, let's look at all the processes together.

Pipe end thickening

Pipe end thickening is mainly used for the oil pipe and geological tube. Since the pipe wall will be thinned after the end of processing, the part of threaded connection has become the weak link of the whole pipe body. In order to improve the strength of the connecting part of the thread, the method of pipe end thickening is adopted to increase the wall thickness of the pipe end. There are 3 forms of pipe end upsetting, internal upsetting, external upsetting, internal and external upset.
The process of pipe end thickening is:
pipe end heated→thickened→cooled→checked.
According to the size of the thickened tube, the thickness of the form and the amount of thickening of the compression, the number of heating and thickening is not the same, there is one heating one thickening, or two thickening one heating. In order to eliminate the phenomenon of uneven performance of the thickened end and the pipe body caused by the thickening, the steel pipe usually does integral heat treatment after thickening.