Trycksatt naturgas överförd till vätskeform, behållare för lagring av naturgasen, marin farkost för transport av naturgasen, metod för att processa respektive transportera naturgasen, samt system för att processa respektive transportera naturgasen

摘要

A container for storing pressurised liquified natural gas (LNG) at a pressure of between 1035 and 7590 kPa and a temperature of between -123 to -62[deg]C is constructed from an ultra-high strength low alloy steel containing less than 9% wt nickel and with a tensile strength greater than 830 MPa and a ductile to brittle transition temperature (DBTT) lower than about -73[deg]C. Also claimed is a container constructed by joining together several discrete plates of the ultra-high strength low alloy steel, where the joints have a tensile strength greater than about 900 MPa and a DBTT lower than about -73[deg]C. Also claimed is a marine vessel for transporting pressurised liquefied natural gas (PLNG) including at least one container constructed as above. Also claimed is a method of transporting PLNG at these pressures and temperatures by (a) delivering the PLNG to a marine vessel with at least one storage container as above, and (b) propelling the marine vessel across a body of water to an import terminal. Also claimed is a system for processing natural gas to produce PLNG at the given pressures and temperatures, where the processing plant contains a number of containers as described.