The invention meets the objective by providing an insulated tank system, comprising an inner tank, thermal insulation external to the inner tank, an inlet and an outlet or a combined inlet and outlet from outside the tank to inside the inner tank, for filling and emptying of fluid, wherein the inner tank contain fluid when in operation. The tank system is distinguished in that it further comprises thermal insulation in the form of insulation block elements arranged side by side externally on the inner tank, with a gap between the insulation block elements at least on the external side thereof, wherein the tank system further comprises a support structure comprising one or more block elements, wherein each block element face and contact an insulation block element, directly or via one or more intermediate layers, wherein the support structure comprises structure for lifting the tank via the support structure, wherein the tank can be lifted and handled by merely loading the external insulation block elements facing said block elements without directly loading the inner tank, and wherein thermal contraction or expansion are taken up by the gaps between the block insulation elements.

A pressure vessel includes curved sidewalls configured as a frame having a polygonal outline, a planar top side and a planar bottom side attached to the curved sidewalls forming a sealed pressure chamber therebetween. Each planar side includes a contoured surface having shaped pressure resistant features formed thereon. A preferred method for forming the pressure resistant features includes hydraulic pressurization to induce plastic strain. The pressure vessel also includes an array of internal support posts within the sealed pressure chamber attached to the planar sides in a geometrical pattern, such as a hexagonal array. The support posts can be solid metal cylinders, hollow tubes or tubes through which reinforcing materials, such as carbon fiber, glass fiber, or fiber/epoxy tape have been passed. A composite pressure vessel includes tubular internal support posts reinforced with reinforcing materials, as well as contoured surfaces and curved sidewalls reinforced with these same reinforcing materials.

A manufacturing method for a tank including a liner and a reinforcement layer having a first layer made up of a pipe fitted to an outer surface of the liner and a second layer covering the pipe includes forming the pipe by winding first fiber reinforced resin containing a first fiber and a first resin around a mandrel and thermally curing the first fiber reinforced resin under a first condition, forming the first layer by fitting the pipe to the liner, and forming the second layer by winding a second fiber reinforced resin containing a second fiber and a second resin around the liner to cover the first layer and thermally curing the second fiber reinforced resin under a second condition. The second condition defines an upper limit temperature at which a shear strength of the first resin is kept higher than a residual stress in the pipe.

A method for coating a wall with a metallic surface layer, the wall including an outer wall layer formed from or including a plastic material or a fiber composite material, the method comprising: in a first step providing a wall base body formed by the outer wall layer; therafter in a second step bonding the outer wall layer to an intermediate layer formed from or including a fiber composite material to form the wall to be coated, wherein fibers of the fiber composite material of the intermediate layer include a metallic surface, wherein fibers of the fiber composite material of the intermediate layer connected to the outer wall layer include a non-metallic fiber core coated with a metal or a metal alloy; and thereafter in a third step coating the wall with the metallic surface layer on a surface of the intermediate layer facing away from the outer wall layer.

The invention provides a tank feasible for cryogenic service and a method of building the tank. The tank comprises: an inner tank, thermal insulation, and an outer shell that is airtight, wherein the thermal insulation is arranged outside the inner tank and the outer shell is arranged outside the thermal insulation, further comprising a coupling through the outer shell, wherein a vacuum pump outside the tank can be coupled for suction of air and gas from the volume between the inner pressure tank and the outer shell, and further comprising an opening from outside the tank to inside the inner tank for loading and unloading of fluid, wherein the inner tank in operation contains fluid and the volume between the inner tank and the outer shell is at vacuum. The tank is distinguished in that: the thermal insulation comprises several block elements arranged side by side on the inner tank, with a gap in between the block elements, wherein the outer shell comprises several parts that have been joined together to cover the whole outer surface of the insulation, wherein parts of the outer shell covering an insulation block element have shape matching the insulation block element shape and parts of the outer shell covering the gaps between the block elements have inward or outward oriented curved shape if seen in cross section along the respective gaps and are flexible by contracting or stretching the curved shape.

In the vicinity of an opening end of a first liner constituent member and a second liner constituent member made of a resin material, a flange portion is formed. After end surfaces of the opening end are abutted and joined to each other, the flange portion is removed in such a way that a part of a bottom portion remains. The remaining amount of protrusion is set such that the joint strength of a joint portion is not less than the tensile strength of the resin material or not less than the cohesion failure strength of the joint portion.

The present invention relates to a hydrogen gas composition comprising specific gas contaminants at threshold limit values (as listed in the ISO 14687:2019 standard). The invention also concerns a metal cylinder such as an aluminium cylinder comprising a hydrogen gas composition according to the invention.

The hydrogen gas composition of the invention may be used as a calibration composition and/or quality control composition for controlling hydrogen fuels.

The use of a sealing layer of a composition including at least one polyamide for preparing a multicore structure intended for the transport, distribution or storage of hydrogen, in particular for the distribution or storage of hydrogen, especially for the storage of hydrogen, the sealing layer satisfying a test for contaminants present in the hydrogen and extracted from the sealing layer after contact of the hydrogen with same, the test been carried out as defined in the standard CSA/ANSI CHMC 2: 19, the total proportion of said contaminants extracted in the hydrogen being less than or equal to 3% by weight, in particular less than 2% by weight of the sum of the constituents of the composition.

A method for manufacturing a high-pressure tank including a liner and a fiber-reinforced resin layer, the fiber-reinforced resin layer having a first reinforcing layer covering an outer surface of the liner and a second reinforcing layer covering an outer surface of the first reinforcing layer includes: forming a cylinder member made of a fiber-reinforced resin and having fibers oriented in a circumferential direction of the cylinder member; forming two dome members made of the fiber-reinforced resin; forming a reinforcing body that is the first reinforcing layer by joining the cylinder member and the dome members; and forming on an outer surface of the reinforcing body the second reinforcing layer made of the fiber-reinforced resin and having fibers oriented across the dome members.

A method for manufacturing a high-pressure tank including a liner and a fiber-reinforced resin layer, the fiber-reinforced resin layer having a first reinforcing layer covering an outer surface of the liner and a second reinforcing layer covering an outer surface of the first reinforcing layer includes: forming a cylinder member made of a fiber-reinforced resin and having fibers oriented in a circumferential direction of the cylinder member; forming two dome members made of the fiber-reinforced resin; forming a reinforcing body that is the first reinforcing layer by joining the cylinder member and the dome members; and forming on an outer surface of the reinforcing body the second reinforcing layer made of the fiber-reinforced resin and having fibers oriented across the dome members.