At the Pelletizing Plant – Hoa Phat Dung Quat, dust collected from the pelletizing furnaces is conveyed through a pipeline system by a high-pressure air stream to the pelletizing dust silos. During operation, the dust stream continuously impacts the bends, elbows and pipe walls at high velocity, creating significant abrasive wear at locations where the flow direction changes.

Through the condition assessment, GAC recorded that many pipeline sections had suffered localized wear, perforation and required frequent welding repairs. Elbows were particularly vulnerable to severe erosion because the dust flow changes direction and impacts directly on the inner pipe wall. With an operating pressure of approximately 6 bar, the wear rate in these areas was higher than on straight pipe sections.

Based on the actual operating conditions and wear mechanism, GAC proposed replacing frequently damaged pipe sections and elbows with steel pipe structures internally lined with Kalcret castable wear-resistant material. This solution focused on protecting the inner surface directly exposed to the dust stream, creating a stable wear-resistant layer inside the pipeline and reducing erosion in high-wear areas.