Glimpses of Evolution of LNG carrier- What forced the manufacture to design the tank to transport the natural gas from one place to another in liquid form and what are the different kinds of lng carriers being used in the global world.

1. Transportation Vessels

2. Market Booms….

3. What it led to Increase in Size of
VESSELS?

4. What can be other reason behind
increase in size of vessels?

6. What forces countries to
transport via carriers?

7. Offshore pipelines
medium distances
< Viable Onshore pipelines

8. Evolution of Variations(Size)…

9. SHIP DESIGN DEVELOPMENT
Vessel Type Typical Size(Cubic metre) Typical Length(Metre)
Small scale LNG 0-36000 137
Medium scale LNG 36000-90000 260
Lower Conventional LNG 90000-145000 277
Upper Conventional LNG 145000-209000 290
Q-flex LNG 209000-220000 315
Q-max LNG 220000+ 345

10. Types of Carriers
• Self-supporting LNG carrier
- Moss tanks (Spherical IMO type B LNG tanks)
- IHI (Prismatic IMO type B LNG tanks)
• Membrane tank LNG carrier
- TGZ Mark III
- GTT 96

11. Moss Tanks(Moss Maritime)

12. Moss Tanks(Moss Maritime)
• Moss type vessels have 4 or 5 tanks.
• Checked at 3 month intervals for any cold
spots that would indicate breakdown in the
insulation.
• Tanks normally have a working pressure of up
to 22 kPa (3.2 psi)-(raised for an emergency
discharge)
• If both main pump fails, then the tank's safety
valves are adjusted to lift cargo at 1bar.

13. IHI (Prismatic IMO type B LNG tanks)
• Designed by Ishikawajima-Harima Heavy
Industries.
• limit sloshing problems, an improvement over
Membrane LNG carrier tanks which may break
due to sloshing impact, therefore
destroying the ship's hull. This is
also of prime relevance for FPSO
LNG (or FLNG).

14. TGZ Mark III

15. GT96