High-precision steel pipes In the conventional quenching method, the cold wind speed is not as fast as oil cooling, and is also lower than the isothermal and graded quenching molten salt.

The main difference between different hot-dip galvanizing methods is how to activate the surface of the tube after acid leaching to improve the quality of galvanizing. Dry and redox methods are mainly used in production, and their characteristics are shown in the table.

Piping systems are the arteries of our industrial processes and the contribution of piping systems are essential in an industrialized society.

The welding process is as follows:①Check whether the connection between the workpiece and the ground wire, welding torch, wire feeder, gas cylinder, barometer, air pipe, etc. is accurate and reliable. If there is a large (small) current file on the panel, use a small current file for voltages below 5 files.

Generally, the welding part needs to undergo heating-melting-metallurgical reaction-solidification crystallization-solid phase transformation-formation of joints and other processes.

In the process of steel pipe welding, there are many precautions. If you neglect it, you may make a big mistake. The welding construction does not pay attention to selecting the appropriate voltage, whether it is for bottoming, filling, or covering, regardless of the size of the groove, choose the same In this way, the required penetration depth and penetration width may not be reached, and defects such as undercut, porosity, and spatter may occur.