ERW welded pipe, also called electric resistance welded pipe, is a steel pipe made of steel plates or steel strips that are welded after being curled and formed. ERW welded steel pipe has a simple production process, high production efficiency, many varieties and specifications, and low equipment investment, but its general strength is lower than that of
seamless pipes.
As we all know, the service life of an item is directly related to its maintenance, and ERW welded pipe is certainly no exception. In order to extend its service life, we must pay attention to the daily care and maintenance of welded pipes. The following is a brief introduction to the maintenance methods of ERW welded pipes.
1. Clean and polish
If the ERW welded pipe is damaged, it should be polished. In particular, scratches and spatter caused by contact with carbon steel parts, and damage caused by cutting slag must be carefully and thoroughly cleaned and polished.
2. Mechanical polishing
Use appropriate polishing tools for polishing, require uniform treatment, and avoid over-polishing and re-scratching.
3. Remove oil and dust
Before pickling and passivating ERW welded pipes, oil, scale, dust and other impurities must be removed according to the welded pipe process.
4. Water sandblasting treatment
According to different processing requirements, different microglass beads and different process parameters should be selected, and overspray should be avoided.
5. Pickling passivation
The pickling and passivation of ERW welded pipes must be carried out in strict accordance with the process requirements.
6. Clean and dry
After pickling and passivation, neutralization, flushing, and drying should be carried out strictly according to the process to completely remove the residual acid.
7. Protect
After the surface treatment of ERW welded pipes is completed, protection should be provided to avoid secondary contamination by personnel touching and oil, dust and other debris.
By performing daily maintenance on ERW welded pipes, not only can its service life be greatly extended, but its efficiency and safety in daily use can also be greatly improved. Therefore, everyone must remember the above methods and remember to perform daily maintenance on welded pipes. .
