| Coating Damage | Coating Repair Method |
| Minor damage, depth ≤0.2 mm | Remove damage by grinding method |
| Small size defects, damage in length ≤ 250 mm, depth not reaching to metal surface | Embedding method by using PE/PP stick |
| Small size defects, damage in length ≤ 250 mm, depth reaching to metal surface | Patching method by using primer, mastic tape, patch tape and protective tape in sequence |
| Large size defects, damage in length ≥250 mm, depth reaching to metal surface | Heat shrinkable sleeve on the top of mastic tape |
| Large size defects, damage in length ≥250 mm, depth reaching to metal surface | Anticorrosion tape method by using primer, mastic tape and anticorrosion tape in sequence. |
Digest from JFE Steel Corporation : “Pipe Coatings”
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