The invention relates to a method for operating a liquefied gas storage tank (1) having a tank volume (2) for receiving LNG and boil-off gas (BOG), wherein a gaseous BOG stream and a liquid LNG stream are fed to the tank volume, and wherein the BOG stream is introduced into the LNG stream, and wherein subsequently the resulting BOG-LNG mixture is introduced into the tank volume. The invention also relates to a corresponding liquefied gas storage tank.

The present invention relates to a natural gas hydrate tank container loading system for transporting natural gas hydrate, and the present invention provides a natural gas hydrate tank container loading system which enables automated connection of an electric power line and a boil-off pipe, and may automatically connect an electric power line and automatically connect the pipe by simultaneously stacking respective natural gas hydrate tank containers, in order to solve problems of a transportation method using the existing natural gas hydrate tank containers in the related art in that an operation of connecting an electric power line to a refrigerator for minimizing the occurrence of boil-off gas and maintaining a phase equilibrium condition in the tank containers and an operation of connecting the pipe for discharging the boil-off gas need to be manually and individually performed for long-distance transportation of a large amount of natural gas hydrate by using a ship, which causes an inconvenience.

A membrane welding device guide system according to the present invention comprises: an anchor strip arranged on an insulation wall which configures an insulation system of a liquefied gas storage tank; a stud integrally formed with the anchor strip, the center of the stud deviating from a welding line of the anchor strip; and a guide rail which is coupled to the stud to form a path of an automatic membrane welding device for welding a membrane to be stacked on the insulation wall. Therefore, the present invention allows membrane welding to be easily performed and allows a membrane welding device to be stably guided.

Herein a floating vessel is disclosed. The floating vessel comprises a deck member and a tank for liquefied hydrocarbon gas such as LNG. The tank extends through the deck member, and the tank is supported by the deck member, suspended at less than of a total height of the tank, seen from the top of the tank.

The present invention relates to an insulation structure, for a liquefied gas cargo hold, having an anchor strip removed, a cargo hold comprising the insulation structure, and a liquefied gas carrier comprising the cargo hold. A thermal protection member is substituted for an existing anchor strip, thereby effectively preventing damage on an upper insulating panel, due to a hot gas and heat transfer during welding of a membrane, by means of the thermal protection member as well as enhancing the fixing force of the membrane. The weight of a cargo hold can be reduced by means of forming the thermal protection member from a material in which aluminum foil is covered with glass cloth. And by means of removing an existing SUS anchor strip, rivet processing is not required and thus constructability can be enhanced.

Systems and methods to create and store a liquid phase mix of natural gas absorbed in light-hydrocarbon solvents under temperatures and pressures that facilitate improved volumetric ratios of the stored natural gas as compared to CNG and PLNG at the same temperatures and pressures of less than ?80? to about ?120? F. and about 300 psig to about 900 psig. Preferred solvents include ethane, propane and butane, and natural gas liquid (NGL) and liquid pressurized gas (LPG) solvents. Systems and methods for receiving raw production or semi-conditioned natural gas, conditioning the gas, producing a liquid phase mix of natural gas absorbed in a light-hydrocarbon solvent, and transporting the mix to a market where pipeline quality gas or fractionated products are delivered in a manner utilizing less energy than CNG, PLNG or LNG systems with better cargo-mass to containment-mass ratio for the natural gas component than CNG systems.

The invention relates to a marine vessel cryogenic barrier which is formed of a plurality of individual panels, each panel being arranged to align with an adjacent panel on an inner surface of a hold space of a marine vessel and comprising a single coupling means at the centre of the panel and an impervious layer on a surface of the barrier facing the hold space.

The invention relates to a transport ship (1) comprising a trim control system (10) not in communication with the sea, in which the trim control system (10) comprises: at least one front liquid tank (20), at least one rear liquid tank (30), a roll-stabilizing tank (40) including at least one pair of partition walls (42) arranged to slow a flow of liquid in the roll-stabilizing tank (40) along the transverse axis (Y-Y) of the ship, and a distribution device (60), the distribution device being in communication with said at least one front liquid tank (20), said at least one rear liquid tank (30), and said roll-stabilizing tank (40), and being designed to distribute a volume of liquid therebetween.

A pressure receptacle support system is provided that has a pressure receptacle, a first end support assembly, and a rotation interface. The first end support assembly is fastened to a first end of the pressure receptacle. The first end support assembly comprises a ground support and a coupler. The coupler has a receptacle interface at a first end and a rotation interface at or extending from a second end opposite the first end. The receptacle interface is fastened to the first end of the pressure receptacle. The pressure receptacle has a sway range which is provided by rotation of the rotation interface of the coupler relative to the ground support and relative motion of a second end of the pressure receptacle relative to a portion of a deck of a maritime vessel.

A hull support structure of a liquefied gas tank has a foundation deck disposed around a liquefied gas tank; a skirt which supports the liquefied gas tank on the foundation deck; an inner bottom plate extending in a hull length direction, at a location that is below the liquefied gas tank; and a pair of bilge hopper plates each of which is provided between the foundation deck and corresponding one of both end portions of the inner bottom plate, wherein a plate connection section at which each of the pair of bilge hopper plates is connected to the foundation deck is disposed outward in a hull width direction, relative to a skirt connection section at which the skirt is connected to the foundation deck.