How to deal with sand holes in stainless steel valves?
Sand holes in stainless steel valves are small dots that are sunken or protruding on the surface, which are mainly caused by raw materials, processes, molds, etc. The presence of sand holes will affect the quality and life of stainless steel valves, so we should deal with them as soon as possible after discovery.
There are four main methods to deal with sand holes in stainless steel valves:
1. Repair welding
Repair the sand holes of stainless steel valves with special welding wire, and then grind and trim them with a grinder. Repair welding can solve small areas of sand holes, but attention should be paid to temperature control during repair welding, which should not be too high or too low.
2. Sand hole treatment agent
Spray the sand holes of stainless steel valves with a special sand hole treatment agent. Spraying is suitable for large areas of sand holes, but attention should be paid to the application range and use environment of different types of sand hole treatment agents.
3. Filling composite materials
Fill the sand holes of stainless steel valves with filling composite materials, and then grind and smooth them. Filling can solve large areas of sand holes, but it has high requirements for the selection of filling materials and operation technology.
4. Secondary processing: Use secondary processing to handle the smaller or fewer sand holes in stainless steel valves, that is, use a grinding machine to grind them flat and then polish them.