Class C Tank:
Design and construct in full accordance with the specifications of pressure vessels. Its design pressure is very high, usually exceeding 2 barg (gauge pressure), and can even reach 18 barg. Its structure (usually cylindrical or spherical) can withstand high pressure and is therefore considered a complete pressure vessel.
Class B Tank:
Design based on complex model experiments and numerical analysis, with a focus on evaluating its stress level, fatigue life, and crack propagation characteristics. It follows the safety principle of "Leakage Before Break" (LBB), which ensures that even if cracks occur, only controllable leakage will occur in the design, and will not cause catastrophic rupture of the entire structure. Its design pressure is relatively low, usually not exceeding 0.7 barg.
safety barrier
C-type tank:
Due to its sturdy pressure vessel and high structural integrity, there is no need to install secondary barriers. Safety is mainly ensured by the tank itself and the gas detection system inside the cabin.
B-type cabin:
Partial secondary barriers need to be set up. This is usually a tray (or "drip tray") located below and around the main cabin, used to collect the escaping liquid in case of a leak in the main cabin, preventing it from directly contacting the ship's structure.
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