In order to provide both access and venting openings to storage vessels, particularly for large quantities of food liquids, which vessels need to be cleaned often, a manway access door is provided with has a partially open stable position which may be used for venting during cleaning. The door is preferably part of a subassembly on its own frame for ease of removal and replacement for repair and maintenance. Spray devices for spraying cleaning liquids inside and outside may be provided.

A tank having an outer wall comprising a plurality of intersecting vertical cylindrical segments joined together at the intersection and arranged with their concave surfaces facing inwardly. Webs joined to junctures of the cylindrical segments and extending across the tank to other junctures carry a part of the outward force applied to the outer wall by liquids stored in the tank.

A sedimentation tank for liquid purification has a submerged horizontal filtering screen for purifying liquid passing upward through it and a scraping mechanism for scraping sludge from the bottom of the tank towards a sludge outlet. The filtering screen extends across the greater part of the interior of the tank, the zone above it being partitioned from an adjoining zone through which extends downwardly a transmission element drivably connecting the scraping mechanism to an outside power source...

A fuel tank for a motor vehicle engine has a vent pipe for fuel or vapour overflow leading from an upper end of the tank filler pipe to a liquid separator chamber housed within the tank. The vent pipe extends from the separator chamber to a container holding activated carbon particles for adsorbing fuel vapour and thence to an air cleanser for the engine carburettor.

A water tank is disclosed suitable for connection to the bowl of a toilet device, the tank being provided with a flush valve actuated from the top end by an actuating device; an inlet valve of the up-closing type, connected to the water supply system; buoyant pulling mechanism for the inlet valve to carry the closing element onto the up-closing seat, to prevent the further entrance of water into the tank, when a predetermined level has been reached; and a rocking lever, mechanically connected to...

A method of manufacturing a tank farm comprises designating on a map of the terrain in which the tank farm is to be located, elongate strips of ground surface located at different predetermined levels of said terrain, the longitudinal axis of each of which strips, when taken in plan view, substantially conforms to a contour line of the map, forming tank sites in the terrain in the form of shallow trenches corresponding to the location of said strips, constructing on each of said tank sites an el...

An improved sewage disposal system having a domed septic tank with a relatively large volumetric capacity and a long flow path with reduced turbulence is provided wherein the weight of the sewage being treated serves to maintain the septic tank in the system in sealed condition while still giving access to the interior of the leaching pool when required.

Tanks for storing materials, especially liquid and semi-liquid materials. The tank wall is formed of a plurality of arcuate panels, each fabricated from vertically stacked precast concrete panel sections, which are joined by vertical pilasters, each pilaster formed from precast concrete pilaster sections. The wall is prestressed by tensioned tendons disposed on the periphery thereof. Each of the pilasters are supported by a separate footing and the ends of the arcuate panels are likewise support...

To form a membrane tank, for example for liquified natural gas, a reel of strip material is positioned adjacent the required tank location and a frame defining the periphery of a slice of the tank is placed within the space to be occupied by the tank. The frame carries a track for guiding a traction device to which is affixed the outer end of the reel strip and the frame also supports and guides the strip of material pulled from the reel as the traction device moves round the track. When the tra...

A tank transport system consisting of a wheeled cart having compartments for holding tanks includes a hose compartment that stores the hoses for the tanks and other associated equipment. The hose compartment includes a flip down door that, in its open position, is disposed substantially horizontally and contains a number of storage slots for holding equipment. A hose storage rack is provided interior of the hose storage compartment for storing the hoses in a wound state. A number of storage area...