LNG Tank - Secondary Barrier Requirement
Secondary barrier carriage requirement per IGC Code Ch. 4 - driven by tank type + pressure.
Secondary barrier
Partial secondary barrier (15-day leak)
Formula, assumptions, and limits
$$\text{Barrier} = f(\text{tank type})$$
Type B Moss: partial barrier (drip tray) because crack propagation is slow + detectable. Membrane systems (NO96, Mark III) have integrated secondary barrier in insulation.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $Type$ | Tank type (A/B/C/Membrane) | - | IGC Ch.4 |
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