Abstract: The present disclosure relates to a weld groove forming method and a hollow article. The weld groove forming method may include: (S110) determining whether a side end of a pipe may be processed into a form of a true circle by using a sensor robot; and (S220) forming a weld groove in a form of a true circle at the side end of the pipe by using an automatic beveling machine when the sensor robot determines that the side end of the pipe may be processed into a form of a true circle in the step (S110).

Abstract: An equalizing tank for a cooling circuit of a motor of a motor vehicle has a tank top piece, on which an inlet line for a coolant is arranged, and a tank bottom piece, on which an outlet line for the coolant is arranged. The inlet line for the coolant is configured as a separate structural unit from the tank top piece, having an outlet opening situated in the region of the tank bottom piece.

Abstract: A quasi-cylindrical cargo container is formed of a plurality of rigid, curved panels together forming first and second semi-cylindrical shells, and a plurality of rigid, flat extension panels bridging the first and second semi-cylindrical shells. A method of manufacturing the container includes forming the first and second semi-cylindrical shell from the curved panels, forming the quasi-cylindrical shell from the first and second semi-cylindrical shells and the flat extension panels, forming collars conformably encompassing the quasi-cylindrical shell, constricting the collars to compress joints formed at abutting edges of pairs of adjacent panels, rolling the shell and collars sequentially to bring the joints to a lower position, welding inside seams of the joints when at the lower position, removing the collars, rolling the shell sequentially to bring the joints to an upper position, and welding outside seams of the joints when at the upper position.

Abstract: The tension-adjusting fishing pole has a composite prism structure. The tension-adjusting fishing pole is a flexible structure with an elastic nature. By flexible is meant that the tension-adjusting fishing pole will deform when a deformation force is applied to the tension-adjusting fishing pole from a direction that is perpendicular to the center axis of the composite prism structure of the tension-adjusting fishing pole. The tension-adjusting fishing pole has an adjustable stiffness. By adjustable stiffness is meant that the modulus of the response of the tension-adjusting fishing pole to the deformation force is adjustable. The tension-adjusting fishing pole comprises a first pole structure, a second pole structure, a fitting structure, and a plurality of working fluids. The fitting structure attaches the first pole structure to the second pole structure to form a fluid impermeable containment structure. The plurality of working fluids are contained in the fluid impermeable containment structure.

Abstract: A molded basin for use with a submersible sump, sewage or grinder pump. The molded construction of the basin permits design improvements to be incorporated into the basin including bolt down slots in a bottom flange of a bottom of the basin, a molded inner basin mounting surface for a float tree, a molded inner surface support mount to receive a bracket of a rail system used to raise and lower the pump within the basin, a disc that fits within the basin and is supported by a molded inner facing horizontal rib to create a wet/dry well and structural features present in a top surface of the basin and a cover for the basin to close said basin. Extension risers may be added to extend the height of the basin, wherein the extension risers contain many of the same structural features that are present in the basin.

Abstract: A quasi-cylindrical cargo container is formed of a plurality of rigid, curved panels together forming first and second semi-cylindrical shells, and a plurality of rigid, flat extension panels bridging the first and second semi-cylindrical shells. A method of manufacturing the container includes forming the first and second semi-cylindrical shell from the curved panels, forming the quasi-cylindrical shell from the first and second semi-cylindrical shells and the flat extension panels, forming collars conformably encompassing the quasi-cylindrical shell, constricting the collars to compress joints formed at abutting edges of pairs of adjacent panels, rolling the shell and collars sequentially to bring the joints to a lower position, welding inside seams of the joints when at the lower position, removing the collars, rolling the shell sequentially to bring the joints to an upper position, and welding outside seams of the joints when at the upper position.

Abstract: There are provided a liquid vessel which is capable of being configured in a large size of prefabricated form, and a method for producing a glass product. A liquid vessel for holding a liquid, comprising at least a first member, a second member and a third member; and a first engageable portion and a second engageable portion being configured such that the first member and the second member are brought into contact with each other to be engaged, and a third engageable portion being configured such that the third member is brought into contact with the first member and the second member in a direction intersecting an engagement direction of the first member and the second member to be engaged with the first member and the second member.

Abstract: A segmented/modular cooling tower fan cylinder having basic segments, a motor segment and an access segment, assembled to form an hourglass shaped cooling tower fan cylinder to protect fan blades, reduce sound and vibration, and enhance performance. The segments are preferably molded fiberglass composite structures having integrally molded vertical and horizontal ribs and a horizontal rib stiffener which connects horizontal ribs of adjacent segments. A top ring stiffener is provided at the junction of each two adjacent segments in the top ring flange. Lifter bars may be provided inside a central vertical rib of the segment to secure cables or straps to hoist an assembled fan cylinder into its final location or to secure a safety harness for workers servicing equipment in the interior space defined by the fan cylinder.

Abstract: The invention relates to an assembly (10) of a tank container (20), an inliner (40) and a connection unit (60) for the transport and/or storage of a liquid. The inliner is present in the tank container and the outlet of the inliner is connected to the drain hole (25) of the tank container. A connection unit is present that secures the connection of both outlets and at the same time provides a liquid tight and an air tight connection with an external unit for the delivery or discharge of the liquid contents.

Abstract: Supporting structure, in particular for a wind power plant, having at least two sub-segments which are at least partially connected to one another and are respectively formed from a metal plate having a longitudinal extent and a width extent. The longitudinal extent being greater than the width extent, and the sub-segments each having longitudinal edges extending in longitudinal extent and being connected to one another at mutually abutting joint surfaces along the longitudinal edges by a welded joint respectively. The sub-segments respectively have end edges extending in width, the sub-segments being bent along their end edges respectively. The respective welded joint has in sections a thickness which is smaller than a wall thickness of the metal plate and in sections a thickness which corresponds at least to the wall thickness of the metal plate.

Abstract: A shock absorber pressure tube defining a working chamber is provided. A piston assembly coupled to a piston rod is slidably disposed in the pressure tube and divides the working chamber into upper and lower working chambers. A reserve tube surrounds the pressure tube to define a reserve chamber. A base valve assembly, position at one end of the pressure tube, controls fluid flow between the lower working chamber and the reserve chamber. The reserve tube comprises first and second open shells that are joined together at longitudinal seams to create a substantially cylindrical shape. The first and second open shells may be made from patchwork blanks, tailor welded blanks, tailor rolled blanks, or tailor heat treated blanks to give different portions of the first and second open shells different thicknesses, strengths, properties, or characteristics.

Abstract: The method of producing a shower tray using a shower tray blank is disclosed. The method may comprise identifying a drain location on the shower tray blank. The method may further comprise deflecting the shower tray blank at an internal location relative to a shower tray perimeter of the shower tray blank along the depth dimension to a deflected state. The method may also comprise cutting the shower tray blank along a plane generally perpendicular to a depth dimension of the shower tray blank when the shower tray blank is in the deflected state to form the shower tray and a discarded portion. An apparatus for producing a shower tray is also disclosed.

Abstract: A tower portion, a tower, and a wind turbine generator assembly are provided. The tower portion includes: a main tower portion, and a longitudinal flange pair. The main tower portion is divided into at least two sections by means a longitudinal seam formed in a longitudinal direction thereof. The longitudinal flange pair is provided in the longitudinal seam along the longitudinal direction of the main tower portion. The longitudinal flange pair protrudes from an inner surface and an outer surface of the main tower portion in a radial direction thereof, and is welded to a corresponding section of the main tower portion. The tower portion reduces welding difficulty, reduces heat produced during the welding process, and improves the quality of the weld. The application further discloses a method for manufacturing the tower portion.

Abstract: A large volume natural gas storage tank comprises rigid tubular walls having closed tubular cross-sections that are interconnected at opposing ends with two other rigid tubular walls such that interiors of the rigid tubular walls define an interior fluid storage chamber. The storage tank also includes bulkheads positioned in the interior fluid storage chamber across intermediate segments of the rigid tubular walls and closure plates connected between exterior surfaces of successive interconnected rigid tubular walls to define sides of the storage tank. Interior surfaces of the closure plates and exterior surfaces of the rigid tubular walls define an auxiliary fluid storage chamber. The storage tank also includes exterior support structures extending through the closure plates and between the exterior surfaces of the rigid tubular walls on some of the sides of the storage tank to reinforce the storage tank against dynamic loading from fluid in the interior fluid storage chamber.

Abstract: A pressure vessel, comprising: a vessel body having a rectangular parallelepiped shape for containing high pressure gas; a dividing wall in the form of a plate and disposed in the vessel body; and a plurality of ribs disposed on an outer surface of the vessel body. The vessel body includes: a top wall having a rectangular shape; a bottom wall having a rectangular shape and facing the top wall; and a surrounding wall joining a peripheral edge of the top wall and a peripheral edge of the bottom wall. The dividing wall is disposed in the vessel body to define a first chamber having a rectangular parallelepiped shape and a second chamber having a rectangular parallelepiped shape in cooperation with the vessel body. Each of the plurality of ribs extends over an entire circumference of the vessel body and along a plane perpendicularly intersecting the dividing wall.

Abstract: The invention relates to a device and to a method for homogeneously welding two-dimensionally bent structures by friction stir welding.

Abstract: A corner structure comprises: a fixed member fixed to a corner of a storage tank; a movable member supported on the fixed member so as to be linearly movable; a stop member attached to the fixed member to prevent the movable member from being detached from the fixed member; and a heat insulating member disposed between a sealing wall and a hull. The fixed member comprises a guide portion provided with a guide recessed portion, the movable member comprises a guide protruding portion inserted into the guide recessed portion, and the width and the length of the guide protruding portion are smaller than the width and the length of the guide recessed portion, so that the movable member can be supported on the fixed member to be movable in the longitudinal direction and in the direction perpendicular to the longitudinal direction.

Abstract: A joint processing method includes: a friction stir welding step for forming a joint in a plate by friction stir welding a groove in the plate; a cold working step for cold working the joint under cold working conditions such that a grain size in the joint is not more than a grain size of an aluminum alloy in the groove prior to the friction stir welding step; and a solution heat treatment step for, subsequent to the cold working step, performing solution heat treatment of the plate.

Abstract: According to the present invention, a heat exchanger comprises a plurality of coolant tubes and a coolant guide having a coolant flow path through which the plurality of coolant tubes communicate with each other, wherein the coolant guide includes a plurality of plates facing each other, wherein the pair of plates, respectively, include coolant flow path units formed facing each other, the coolant flow path unit forming the coolant flow path, and wherein the pair of plates, respectively, further include joining parts that come in surface contact with each other. Accordingly, the number of parts of the coolant guide may be minimized, and the structure of the heat exchanger may be simplified.

Abstract: The present invention relates to a pressure tank in stainless steel to be used as a water heater. The tank is provided by two identical tank halves (12a, 12b; 14a, 14b). The two tank halves are joined about a common dividing plane (7) and have a longitudinal axis (26) that lies in the dividing plane (7) so that an extended tank is provided. The tank halves have welding flanges (22a, 22b) that are placed against each other in the joint dividing plane (7) and are joined together by welding or melting of the flanges (22a,22b) to a watertight tank. The plate thickness is calculated according to the maximum test pressure of the tank and not limited by the welding. An efficient welding of the internal welding seam (24), by placing the tank in a rig and rotating the tank, provides safe protection against corrosion in the weld.

Abstract: A method includes wrapping one or more pieces of fabric around at least one piece of shape memory material. The method also includes attaching outer edges of the one or more pieces of fabric to other portions of the one or more pieces of fabric. The method further includes depositing liquid-impervious material onto the one or more pieces of fabric to form free-standing flexible walls and a floor of a containment structure. The floor is formed seamlessly with the walls. The wrapping could include attaching a bottom of the at least one piece of shape memory material to the one or more pieces of fabric at locations spaced apart from the outer edges of the one or more pieces of fabric. The wrapping could also include attaching sides of the at least one piece of shape memory material to the one or more pieces of fabric.

Abstract: A containment system comprising a flexible bladder having at least one opening through which a liquid or other fluid or material can be pumped or transferred into or out of the bladder. The bladder has a contracted and an expanded or semi-expanded state. A support structure surrounds the side surfaces of the bladder and provides lateral support to the bladder when the bladder is in an expanded or semi-expanded state. The support structure comprises a plurality of panels that are seperably connected to one another to form an enclosed walled support structure. The at least one opening in the bladder is operatively connected to a point exterior to the support structure to permit the bladder to be filled or evacuated from a position exterior to the support structure.

Abstract: The present invention relates to an Oven muffle (1), comprising at least a first metal sheet part (2) and a second metal sheet part (3) wherein the first metal sheet part and the second metal sheet part are arranged in an overlapping manner relative to each other, wherein the second metal sheet part comprises a portion (32) which is formed by a S-like or Z-like displacement of the second metal sheet part, and wherein the first metal sheet part and the second metal sheet part are connected by a welding seam at least in the overlapping region of first metal sheet part and second metal sheet part.

Abstract: A pallet-like underframe has a base for supporting an inner container and corner feet mounted on a base frame on which the base of the underframe is mounted. The corner feet include a cup-shaped corner foot body having a front wall and cup parts formed to the side of a central axis of the front wall. The cup parts each include an inwardly bent edge web. The edge web includes an upper edge web section, a lower edge web section, and a lateral edge web section formed between the upper and the lower edge web section on a side edge of the front wall. The upper edge web section, the lateral edge web section, and the lower edge web section are configured to go over into one another continuously in edge web forming regions.

Abstract: A sample vessel assembly, comprising a base member including a base flange having first and second opposing surfaces, first and second sides intersecting with one another; and a first sidewall extending from the first surface at a distance from the first and second sides; and a lid member, including: a lid flange having third and fourth opposing surfaces, third and fourth sides intersecting with one another; and a second sidewall extending from the third surface at a distance from the third and fourth sides, the second sidewall engageable with the first sidewall such that the first surface of the base flange and the third surface of the lid flange are in an opposing spaced-apart relationship with one another and such that the first and second sidewalls cooperate with one another to define a sample chamber. Further disclosed is a method for automated analysis of samples in a sample vessel assembly.

Abstract: An improved apparatus and method provide a portable fuel supply for a vehicle. The apparatus comprises a vessel that is a source of fuel and a conduit that is operatively connected with the vessel at one end. There is also a coupling pin arrangement connected with the vessel. The coupling pin arrangement comprises a coupling pin and is mutually engageable with a fifth wheel coupling device. An end opposite the one end of the conduit operatively connects with a fuel system of the vehicle such that the vessel is in fluid communication with the fuel system and the vehicle operates with the fuel from the vessel.

Abstract: A modular system for constructing liquid storage tanks, comprising prefabricated reinforced concrete modular elements designed and adapted to be coupled together to form the tank walls and having means for engaging the bottom slab or foundation. Optionally, the system further comprises elements which mate with the tank wall elements in order to build a covered tank. In one embodiment of the system, the modular wall elements include a prestressing wire or strand embedded in its structure and to which a tensile force is applied to produce a compressive stress in the side of the wall element that is contact with the liquid stored in the tank. Optionally, the constructing system comprises elements to form divisions or cells inside the storage tank.

Abstract: A grease interceptor system with a corrugated pipe stub that can be obtained and cut to size in the field during installation.

Abstract: According to one embodiment, an apparatus, connectable to objects of different sizes, comprises: a first connection body comprising a first plurality of spaced-apart connectors and a second plurality of spaced-apart connectors; and a second connection body comprising a first connector and a second connector, the first connector connectable to and disconnectable from a first one of the first plurality of spaced-apart connectors, and the second connector connectable to and disconnectable from a first one of the second plurality of spaced-apart connectors. When the first connector is connected to the first one of the first plurality of spaced-apart connectors and when the second connector is connected to the first one of the second plurality of spaced-apart connectors, the first connection body and the second connection body define a region having a first size between the first connection body and the second connection body. Methods are also disclosed.

Abstract: A fluid filtration device contains a processing tank, a driving unit disposed outside the processing tank, a water pipe and a filtering unit. The processing tank is formed by plural substrate units arranged around the processing tank, each substrate unit has plural plate members connected together and formed on equal proportion, each plate member has an external surface and at least one circularly recessed portion, and on two connecting edges of any two adjacent plate members is defined a connector. The water pipe is connected with the driving unit and includes a peripheral wall, a plurality of apertures, and plural retaining protrusions. The filtering unit includes a plurality of filtration bags and plural guiding disks, each filtration bag has a first central pore, and each guiding disk has a body, a second central pore, and a plurality of coupling recesses.

Abstract: A configurable fluid retention apparatus includes a plurality of detachable panels configured to interlock with each other to form an outer structure of the configurable fluid retention apparatus, an internal bladder secured to at least one of the plurality of detachable panels, and comprising an intake connection, an outlet connection, and an air relief device. An intake valve is fluidly coupled to the internal bladder at the intake connection and configured to allow unidirectional fluid flow. Each of the plurality of detachable panels includes a plurality of interlock members and interlock gaps of substantially equal widths positioned along a perimeter of each detachable panel, a plurality of variable connection openings extending through the body of each detachable panel, and the orientation panel comprises an orientation portion comprised of two interlock members extending substantially perpendicular to each other.

Abstract: A pharmaceutical waste disposal assembly (10) for disposing of raw pharmaceutical waste comprises a first receiver body (19) and a first reaction agent (287). The first receiver body (19) receives the pharmaceutical waste. The first receiver body (19) includes a receiver bottom (283). The first reaction agent (287) is positioned within the first receiver body (19) and spaced apart from the receiver bottom (283). The pharmaceutical waste reacts with the first reaction agent (287) to change the pharmaceutical waste in one of a chemical and physical manner so that the pharmaceutical waste is unrecoverable. The first receiver body (19) can receive fluid pharmaceutical waste and/or solid pharmaceutical waste. The first reaction agent (287) may include one or more of a denaturant, an emetic and a tittering agent. For example, the first reaction agent (287) may include one or more of quinine, ipecac and denatonium benzoate.

Abstract: A fluid storage tank is formed by a plurality of wall panels positioned on top of a floor mat. Each wall panel includes a curved sheet of a non-metal material, for example fiberglass, first and second side frame members and a plurality of reinforcing strips that extend between the side frame members. The reinforcing strips are secured to the side frame members. The panels include complimentary fastening members that allow the curved side panels to be connected end to end so as to form a circular fluid storage tank in conjunction with a floor mat.

Abstract: A wooden water tank for a building has a wooden tank wall, a tank bottom and a wooden dividing wall across the tank defining at least two water compartments. There are attachments between the foregoing parts, and leak preventing connections between parts. Each wall is a sequential series of staves or boards secured together for leak prevention. The staves of the circumferential tank wall extend vertically. The staves of the dividing wall extend horizontally. The staves are all pressed together so that neighboring staves are sealed to each other preventing leakage through the walls. There are hoops and hoop segments around the circumferential wall, and connections to the hoops press the staves of the circumferential wall toward each other for sealing.

Abstract: A fluid storage tank includes a plurality of tank sub-units disposed in an array. Each tank sub-unit of the plurality of tank sub-units has an aperture defined in at least one wall overlapping with another aperture defined in at least one adjacent tank sub-unit of the plurality of tank sub-units. Each tank sub-unit of the plurality of tank sub-units is in fluid communication with a single outlet port for selectively extracting a stored fluid from the tank. Each of the plurality of tank sub-units is in fluid communication with a single fluid fill port. The array of tank sub-units is tessellated into a three-dimensional volume. A shell is disposed in contact with a plurality of the tank sub-units to envelop the array. The single outlet port and the single fluid fill port pass through the shell.

Abstract: A hydrogen storage tank for a hydrogen fueled aircraft. The tank has a wall made of layers of aerogel sections around a hard shell layer, sealed within a flexible outer layer, and having the air removed to form a vacuum. The periphery of each layer section abuts other sections of that layer, but only overlies the periphery of the sections of other layers at individual points. The wall is characterized by a thermal conductivity that is lower near its gravitational top than its gravitational bottom. The tank has two exit passageways, one being direct, and the other passing through a vapor shield that extends through the wall between two layers of aerogel. A control system controls the relative flow through the two passages to regulate the boil-off rate of the tank.

Abstract: A configurable fluid retention apparatus includes a plurality of detachable panels configured to interlock with each other to form an outer structure of the configurable fluid retention apparatus, an internal bladder secured to at least one of the plurality of detachable panels, and comprising an intake connection, an outlet connection, and an air relief device. An intake valve is fluidly coupled to the internal bladder at the intake connection and configured to allow unidirectional fluid flow. Each of the plurality of detachable panels includes a plurality of interlock members and interlock gaps of substantially equal widths positioned along a perimeter of each detachable panel, a plurality of variable connection openings extending through the body of each detachable panel, and the orientation panel comprises an orientation portion comprised of two interlock members extending substantially perpendicular to each other.

Abstract: A pair of storage tanks are mounted to a tractor on either side of a tractor frame. In one embodiment, each tank can be mounted underneath a tractor cab and between a track and the tractor frame. Furthermore, each tank extends from a leading end forming a tapered, frusto conical tip to a trailing end extending longitudinally along the tractor frame. The tanks can be supported with one or more mounting brackets assembled to the tractor frame. The tanks are fluidly coupled to plumbing and a pump that feeds liquid to a sprayer attached to the tractor.

Abstract: An apparatus comprising a first structure, a second structure, a first layer, and a second layer. The first structure has a first plurality of channels extending towards a number of edges of the first structure. The second structure has a second plurality of channels extending towards a number of edges of the second structure. A first side of the first structure is connected to a first side of the second structure. The first plurality of channels and the second plurality of channels have an orientation with respect to each other. The first layer is connected to a second side of the first structure. The second layer is connected to a second side of the second structure.

Abstract: A large volume natural gas storage tank comprises a plurality of rigid tubular walls each having opposing ends and an intermediate segment with a closed tubular cross-section, the plurality of rigid tubular walls arranged in a closely spaced relationship and interconnected at their ends, with each end of a given of the plurality of rigid tubular walls connected with respective ends of two others of the plurality of rigid tubular walls to define a corner of the storage tank, such that the interiors of the plurality of rigid tubular walls define an interior fluid storage chamber.

Abstract: A liner and method of application for use on a metal surface to protect metal structures such as cooling towers, evaporative condensers, and other liquid containing vessels such as tanks from corrosion, leaks, and wear. The liner is an inexpensive apparatus and process comprising a coated metal having a second sealing and bonding layer and a third protective sealing layer. The liner method comprises applying an organic bonding layer onto the galvanized substrate, and applying an elastomeric barrier coating to the bonding layer. The barrier coating material is applied to preseal the seams between adjoining panels assembled to form the basin. The barrier coating is applied to the entire inside of the basin to form a homogenous barrier coating extending out of the basin. The liner edge is isolated from the basin by extending the liner to a point between the basin and an upper section.

Abstract: A storage tank including a frame and a tank assembly. The tank assembly including a vessel supported by the frame and having a first end, a second end, and a polygonal sidewall extending from the first end to the second end. The vessel further having a top, a bottom, at least one side, and an internal surface, and an outlet fluidly coupled with the bottom; and a chemical-resistant lining associated with the internal surface of the sidewall and being substantially flexible. The frame is configured to support the tank assembly so that the bottom of the vessel is elevated a distance above a surface to allow for visual inspection of the top, bottom, and the at least one side of the sidewall.

Abstract: A tank for a transformer includes a left side wall, a right side wall opposing the left side wall, a front wall, a rear wall opposing the front wall, and a trapezoidal-shaped base. Each of the left side wall, the right side wall, the front wall and the rear wall extends from the base so as to define a trapezoidal-shaped tank having an open end in communication with an interior space. The right and left side walls, and the rear wall are constructed and arranged so that the open end slants downwardly from front to back of the tank. A cover is adhered to the tank to cover the open end. The tank is constructed and arranged to house transformer components in the interior space.

Abstract: In an exemplary embodiment, a modular secondary containment unit is adapted to surround an above-ground fluid storage tank and includes a plurality of corner assemblies. Two or more components of each of the corner assemblies are composed of one or more reinforced resin composite materials. In several exemplary embodiments, the modular secondary containment units and the above-ground fluid storage tanks are used in oil and gas exploration and production operations. In an exemplary embodiment, an assembly for a modular secondary containment unit includes a track segment including first and second channels, a wall segment mounted on the track segment and extending within the first channel of the track segment, and a brace engaged with the wall segment and extending within the second channel of the track segment. In an exemplary embodiment, a method of constructing a modular secondary containment unit is provided.

Abstract: A fluid reservoir includes a housing defining a chamber for receiving a fluid. The housing may be generally rectangular with six orthogonally oriented sides. A plurality of mounting portions are carried by the housing. One or more fittings are selectively attached to respective mounting portions of the plurality of mounting portions. The mounting portions may include mounted surfaces at an intersection of a pair of adjacent sides of the housing. The mounting surfaces may be at angles to both of the respective adjacent sides.

Abstract: The present invention relates to a pressure vessel (1) for a high pressure press, wherein the pressure vessel comprising a first sub-cylinder (4), a second sub-cylinder (6), pre-stressing means (8), and a securing member (16). The first and the second sub-cylinders (4, 6) are axially connected to form a cylinder body (2) for enclosing a high pressure medium. The first sub-cylinder (4) is in an outer wall provided with a first seat (22) for receiving a first part (24) of the securing member (16) and the second sub-cylinder (6) is in an outer wall provided with a second seat (26) for receiving a second part (28) of the securing member (16). The securing member (16) is fitted in the first and second seats (22, 26). The securing member (16), and the first and second scats (22, 26) are arranged such that the securing member (16), and the first and second scats (22, 26) cooperate to prevent separating axial movement between the first and the second sub-cylinders (4, 6).

Abstract: A large capacity above ground impoundment tank includes a number of first-level interlocking panels connected to one another to form a generally circular tank. The first-level interlocking panels include a plate, a first flange, a second flange, a third flange, and a fourth flange. The first-level interlocking panels include at least retaining rib and at least one vertical support member. The third flange of each first-level interlocking panel includes a guide pin. The first flange of a first-level interlocking panel is connected via suitable fasteners to the second flange of an adjacent first-level interlocking panel. A number of second-level interlocking panels may be positioned on a top surface of the first-level interlocking panels. The second-level interlocking panels may be similar to the first-level interlocking panels. The guide pin of a first-level interlocking panel is inserted into a corresponding guide pin hole on the fourth flange of a corresponding second-level panel.

Abstract: A molded plastic tank, optionally a septic tank, for containing liquid, comprises two injection molded plastic half tanks that have concave exterior walls and integral flanges, and that nest within each other for shipment or storage. Lengthwise ends of the half tanks have grips, for manual or machine lifting of the half tank from the top of a concave-down stack of half tanks, and for then assembling whole tanks. A sling is used to machine lift one or several half tanks by attachment to the grips or to lifting lugs at the top of the half tank. A corrugated septic tank having spaced apart access port regions has a grid of ribs in the exterior top valley corrugations and running across the access port region, to provide strength during testing and use.

Abstract: A tank includes a bottom portion with an upwardly extending annular flange having a reduced thickness at an end portion as compared to a lower portion. A generally cylindrical sidewall portion has an end portion disposed within the annular flange and forms a joint therewith. An internal overlaminate piece is bonded about an inner circumference of the joint. An external overlaminate piece is bonded about an outer circumference of the joint.

Abstract: A method includes wrapping one or more pieces of fabric around at least one piece of shape memory material. The method also includes attaching outer edges of the one or more pieces of fabric to other portions of the one or more pieces of fabric. The method further includes depositing liquid-impervious material onto the one or more pieces of fabric to form free-standing flexible walls and a floor of a containment structure. The floor is formed seamlessly with the walls. The wrapping could include attaching a bottom of the at least one piece of shape memory material to the one or more pieces of fabric at locations spaced apart from the outer edges of the one or more pieces of fabric. The wrapping could also include attaching sides of the at least one piece of shape memory material to the one or more pieces of fabric.