What kind of welding process is this?

This is oxyacetylene welding, which is copper brazing. The professional name is fusion welding.

It is also commonly referred to as brazing, which requires oxygen and acetylene gas, and then a special welding torch.

H01-12 type welding torch

Use the flame of the welding torch to heat the workpiece. Preheat the copper electrode and bake it on the fireworks, and stick some copper soldering powder (copper soldering flux). agent).

Then melt it at the weld of the workpiece that needs to be welded. This requires skilled craftsmanship to weld. The copper electrode cannot be melted at low temperatures. If the temperature is high, a thin pipe will be melted and leaked.

It is also necessary to operate under the leadership of a professional master. The master must have a special operation certificate. He cannot work without a certificate, which is against the rules.

Apprentices are not allowed to operate construction independently.