13. What are the other methods of welding?

In addition to high-frequency welding, there are arc welding and resistance welding.
13.1. What is arc welding?
Arc welding is to melt the edge of the steel plate through the heat generated by the arc and add welding materials for welding. Arc welding is suitable for the production of welded pipes of various materials and specifications, but the production efficiency is relatively low.
13.2. What is resistance welding?
Resistance welding is to use the resistance heat generated when the current passes through the weldment to melt and weld the weldment. Resistance welding has the advantages of fast welding speed and small heat-affected zone, but the equipment investment is large.