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It’s been another eventful week in LNG, with developments across the market, shipping, terminals, and offshore projects.
I’ve selected the stories that stood out this week and brought them together in one place, so you can catch up on what’s happening across the industry.
🎓 LNGKnowledge
The LNG Cargo tank are warmed up before inerting operation 📈.
LNG from the liquid and spray lines must be properly drained prior to the warmup operation and the lines proved liquid free 🎯.
Warmup of the cargo tanks is achieved by drawing cold vapour from the tanks using HD compressors, circulating the vapour through the cargo heaters🔥, and returning it back to the tanks.
Large quantities of gas will be generated during the initial stages of the warmup as the residual LNG in the tanks is vaporised 📈. The gas may be burnt in the boilers, utilising the stream dump if necessary or using the GCU.
A successful warmup of the cargo vapour achieves the maximum vapour density difference between the warm LNG Vapour and the Inert gas for the next stage, which improves the displacement effect while inerting.
The warmup operation is continued until at least the following temperatures are achieved 👇
Membrane type +5°C at the secondary barrier
Moss type +25°C at the #tank wall.
Source : LNG Shipping Knowledge
How long the warming up takes ❓
140.000 m³ membrane 48hours from -130°C ➡ +5°C
135.000 m³ Moss type 60 hours from -130°C ➡ +25°C
Watch the Insulation Space pressure as, when the space warms up, the N2 expands and will be released to the atmosphere.
