| V-External Visual Inspection |
| All cargo Tanks designed to be loaded by vacuum with full opening rear heads. |
6 months |
| All other cargo tanks. |
1 year |
| I-Internal Visual Inspection |
| All insulated cargo tanks, except MC330, MC331, MC338 |
1 year |
| All cargo tanks transporting lading corrosive to tank. |
1 year |
| All other cargo tanks, except MC338. |
5 years |
| L-Lining Inspection |
| All lined cargo tanks transporting lading corrosive to tank. |
1 year |
| K-Leakage Test |
| MC330 and MC331 cargo tanks in chlorine service. |
2 years |
| All other cargo tanks, except MC338. |
1 year |
| P-Pressure Test |
| All cargo tanks which are insulated with no manhole, or insulated and lined, except MC338. |
1 year |
| All cargo tanks designed to be loaded by vacuum with full opening rear heads. |
2 years |
| MC330 and MC331 cargo tanks in chlorine service. |
2 years |
| All other cargo tanks. |
5 years |
| T-Thickness Test |
| All unlined cargo tanks transporting material corrosive to the tank, except MC338. |
2 years |
| UC-Upper Coupler Inspection |
| All cargo tanks transporting material corrosive to the tank. |
2 years |
| All other cargo tanks. |
5 years |
