6.3 Recommended repair

6.3.1 Tables 3.1, 3.2 and 3.3 describe the recommended short, medium and long-term repairs.

6.3.2 Coating repair should be inspected by qualified inspectors certified to NACE Coating Inspector Level 2, FROSIO Inspector Level III or equivalent as verified by the Administration.

Table 3.1 – Recommended SHORT term repair
Purpose	Preparation¹	Coating System		Dry film thickness (DFT)
Repair of affected area	•Removal of mud, cargo residues, grease, etc., thorough tank cleaning	(Not recommended for tankers of less than 18 years of age)	•Coating system approved according to resolution MSC.288(87)	•250 μm DFT^footnote
	•Drying		•The same coating system as was originally employed, or a coating system compatible with the original system, or equivalent according to manufacturer's recommendation. (Care must be taken to confirm that the coating used will have the necessary adhesion to such a surface for the target coating life)	•Minimum two spray coats with two stripe coats
	•St 3 to Sa 2^footnote surface preparation
•POOR to GOOD	•Intact coating next to damage area should be feathered
•FAIR to GOOD	•Total soluble salts, calculated as sodium chloride, according to manufacturer's recommendation but not more than 80 mg/m²
	•Particular focus on pitted steel
	•Climatic control
Note:	For partial or small spot area repairs it is well understood that these recommendations might not be possible but suitable preparation for the paint system being used should be according to paint manufacturer's recommendations.

Table 3.2 – Recommended MEDIUM term repair
Purpose	Preparation¹	Coating System		Dry film thickness (DFT)
Repair of affected area	•Removal of mud, cargo residues, grease, etc., thorough tank cleaning	(Not recommended for tankers of less than 10 to 12 years of age)	•Coating system approved according to resolution MSC.288(87)	•280 μm DFT^footnote
	•Drying		•The same coating system as was originally employed, or a coating system compatible with the original system, or equivalent according to manufacturer's recommendation. (Care must be taken to confirm that the coating used will have the necessary adhesion to such a surface for the target coating life)	•Minimum two spray coats with two stripe coats
	•Minimum Sa 2 to 2½^footnotesurface preparation
•POOR to GOOD	•Re-cleaning with detergent
•FAIR to GOOD	•Intact coating next to damage area should be feathered
	•Total soluble salts, calculated as sodium chloride, according to manufacturer's recommendation but not more than 80 mg/m²
	•Particular focus on pitted steel
	•Climatic and temperature control
Note: For partial or small spot area repairs it is well understood that these recommendations might not be possible but suitable preparation for the paint system being used should be according to paint manufacturer's recommendations.

Table 3.3 – Recommended LONG term repair
Purpose	Preparation¹	Coating System		Dry film thickness (DFT)
Repair of affected area	•Removal of mud, cargo residues, grease, etc., thorough tank cleaning	(Required for tankers of less than 5 to 7 years of age)	•Coating system approved according to resolution MSC.288(87)	•320 μm DFT
	•Drying		•The same coating system as was originally employed, or a coating system compatible with the original system, or equivalent according to manufacturer's recommendation.	•Minimum two spray coats with two stripe coats
	•Minimum Sa 2½^footnote surface preparation
•POOR to GOOD	•Re-cleaning with detergent
•FAIR to GOOD	•Intact coating next to damage area should be feathered
	•Total soluble salts, calculated as sodium chloride, according to manufacturer's recommendation but not more than 50 mg/m²
	•Particular focus on pitted steel
	•Continuous climatic and plating surface temperature control (for condensation as well as application and curing temperature limitations of the paint system)
Note: For partial or small spot area repairs it is well understood that these recommendations might not be possible but suitable preparation for the paint system being used should be according to paint manufacturer's recommendations.