1. Processed parts and finished products shall not be disposed of externally without acceptance by experience.
2. Before rust removal, the burrs, welding skin, knobs, spatter, dust, scale, etc. on the outer surface of the welded steel pipe should be cleaned, and the rust scale and thick rust layer should be removed at the same time.
3. If there is grease on the surface of the welded steel pipe, it should be cleaned before rust removal. If oil and grease stains are present only on some areas, a partial disposal method is usually an option; if there are large or all areas, solvent or hot alkali cleaning may be an option.
4. When there are acids, alkalis and salts on the surface of the welded steel pipe, you can choose to wash them away with hot water or steam. However, attention should be paid to wastewater treatment that does not cause environmental pollution.
5. Some newly rolled stainless steel pipes are coated with curing paint to prevent rust during short-term storage and transportation. Stainless steel pipes coated with cured paint should be treated according to specific conditions. If the cured paint is a two-component paint cured by a curing agent, and the paint is basically intact, it can be treated with emery cloth, stainless steel pipe velor or light spraying to remove dust before proceeding to the next step. Construction steps.
6. The primer or ordinary primer cured coating on the outer surface of the welded steel pipe is usually determined based on the state of the coating and the next supporting coating. All items that cannot be used for further coatings or that affect adhesion of the next coat should be removed.
