A storage tank includes a tank roof and a tank sidewalk. At least one opening is located in at least one of the tank roof or the tank sidewalk. A pipe extends through the at least one opening, the pipe having a sleeve assembly positioned around the pipe. The sleeve assembly also extends through the opening. The sleeve assembly includes a sleeve, at least one layer of insulation, and an inner flange. The inner flange is located on a first end of the sleeve and is coupled to the pipe. The sleeve, in turn is coupled to the tank such that the inner flange is located within the storage tank. The at least one layer of insulation is positioned in an annul us between the pipe and the sleeve.
F16L 59/16 - Dispositions spécialement adaptées aux nécessités localisées telles qu'à l'endroit des brides, des jonctions, des soupapes ou d'autres éléments similaires
A method of designing a self-shielding tank is disclosed. The method includes calculating a wind pressure loading and a projectile impact loading for the tank. Finite element analysis results are generated for the tank based on the calculated wind pressure loading and projectile impact loading. Tank geometry and features based on analysis results are determined and compared to acceptance criteria. The generated finite element analysis results are limited by a specified degree of plastic deformation.
An apparatus and method for raising a self-jacking scaffold system including extending a jacking screw and jacking screw bracket axially upward, connecting a jacking screw bracket to an overhead tank bracket for a plurality of scaffold sections coupled to a jacking assembly, detaching a plurality of scaffold mounting brackets from a plurality of tank mounting brackets, raising the continuously coupled plurality of scaffold sections, and reattaching the plurality of scaffold mounting brackets to a plurality of tank mounting brackets. Noting the plurality of scaffold sections is continuously coupled proximate a circumference of a shell tank, the continuously coupled scaffold sections and tank mounting brackets provide stiffness to the tank shell to enable it to resist external loads and can be quickly moved and restored as required during tank construction.
E04G 3/24 - Échafaudages essentiellement supportés par le bâtiment, p. ex. réglables en hauteur spécialement adaptés pour des endroits particuliers des bâtiments ou pour des bâtiments de forme particulière, p. ex. cheminées de haut-fourneaux ou pylônes
A process for the recovery of LPG from liquefied natural gas (LNG) is disclosed. The LNG feed stream is subjected to a two stage separation process where the bottoms from the first stage separation containing C2+ hydrocarbons is split into three portions, one portion is fed directly to the top of the second separation stage as a reflux stream, a second portion is warmed and partially vaporized by cross heat exchange with overhead vapors from the second separation stage before being fed to the middle of this second separation stage, and the third portion is heated and vaporized by cross heat exchange with bottom liquids from the second separation stage prior to being fed into the bottom of this same separation stage.
A new process for insulating the void in a thermal distance piece in a low-temperature or cryogenic storage tank uses a vacuum source to draw insulation into the TDP. Two remotely spaced openings to the void are provided. A strainer is temporarily mounted in one of the openings. The other opening is connected to a suction wand. The wand has an inner cylinder that extends through an outer cylinder and projects outwardly from a proximal end of the outer cylinder. Distal air vents are provided on the inner cylinder, near a distal cap that connects distal ends of the cylinders. Proximal air vents are provided on a proximal cap that connects a portion of the inner cylinder to a proximal end of the outer cylinder. The distal end of the wand is inserted into a container of insulation. When a vacuum is drawn through the opening with the strainer, the insulation is drawn through the wand and into the void.
F17C 3/08 - Récipients non sous pression assurant une isolation thermique par des espaces où le vide a été fait, p. ex. vases de Dewar
F17C 1/12 - Récipients sous pression, p. ex. bouteilles de gaz, réservoirs de gaz, cartouches échangeables avec des moyens pour assurer une isolation thermique
F17C 13/02 - Adaptations spéciales des dispositifs indicateurs, de mesure ou de contrôle
F17C 13/00 - Détails des récipients ou bien du remplissage ou du vidage des récipients
A new procedure for constructing cryogenic storage tanks involves erecting a freestanding metal liner. The liner is sized and configured to withstand the hydraulic forces the concrete wall of the tank being poured without the need for temporary stiffeners on the inside surface of lower portions of the liner. Lateral tension ties can be connected to anchor ties on an outward surface of the liner and used to tie the liner to outer formwork. These ties may be spaced up to about 2 m apart. Studs can also be provided on the outer surface of the liner, and a cylindrical ring of cryogenic steel can be integrated into the liner.
An integrated computer control process is used for a decoking cycle that takes into account all affected process variables including temperature, pressure, flow rates, and time related functions. Manual operator input is limited to setting the basis of the decoking cycle, which can include temperatures and pressure ranges, and monitoring key parameters, such as pressure tests.
The assembly includes a boil-off gas line that carries storage tank boil-off gas to a condenser that uses condensing liquid from the liquid send-out line to condense the gas. A level control valve on the condensing liquid line actively controls the flow of condensing liquid based on the liquid level in the condenser. A check valve prevents liquid from the send-out line from flowing into the condenser through the condensate line that discharges condensate from the condenser to the send-out line.
F25J 1/00 - Procédés ou appareils de liquéfaction ou de solidification des gaz ou des mélanges gazeux
F17C 5/02 - Procédés ou appareils pour remplir des récipients sous pression de gaz liquéfiés, solidifiés ou comprimés pour le remplissage avec des gaz liquéfiés
F17C 7/04 - Vidage des gaz liquéfiés avec changement d'état, p. ex. vaporisation
F17C 9/02 - Procédés ou appareils pour vider les gaz liquéfiés ou solidifiés contenus dans des récipients non sous pression avec changement d'état, p. ex. vaporisation
9.
STORAGE TANK WITH SELF-DRAINING FULL-CONTACT FLOATING ROOF
A storage tank with a full-contact floating roof (10) is provided with automatic drains (22) that have drain openings (56) that are elevated above the top surface (16) of the deck (14) of the roof. Tilting mechanisms are used to tilt the deck toward the drains, causing liquid on the deck surface to pool at the drains, rising to the level of the drain openings. Cables (70) connected to elevated portions of the tank can be used to tilt the deck from above, and landing supports (100) can be used to tilt the deck from below.
B65D 88/38 - Grands réceptacles à couvercles flottants, p. ex. à couvertures ou à toits flottants avec un récepteur d'eau de ruissellement, p. ex. une gouttière
B65D 88/40 - Grands réceptacles à couvercles flottants, p. ex. à couvertures ou à toits flottants avec des butées d'arrêt pour le couvercle
