A floating roof system with lightning protection includes a storage tank and a floating roof disposed inside the storage tank. A shoe seal is installed in sealing contact with an inner side wall surface of the storage tank. A primary seal extends between a rim of the floating roof and the shoe seal. A secondary seal extends over the primary seal and has an end in sealing contact with the inner side wall surface of the storage tank. Several shunts are distributed along a perimeter of the floating roof. The shunts extend over the primary seal and under the secondary seal. The shunts are attached to the primary seal and shoe seal by connections distributed along the shoe seal. The shunts are also attached to the primary seal, the secondary seal, and the rim of the floating roof by connections distributed along the rim.

A wall box includes an enclosure having a base and a cover connected to the base. The base and the cover enclose an interior region. The wall box further includes a plurality of fiber optic adapters mounted to the enclosure. The fiber optic adapters include an inner port positioned inside the interior region and an outer port positioned at an outer surface of the enclosure. A tray stack is mounted within the interior region. The tray stack includes a tray mount pivotally connected to the enclosure. The tray mount includes a top surface and an oppositely disposed bottom surface. A first splice tray mounting area is disposed on the top surface and a second splice tray mounting area is disposed on the bottom surface. A plurality of trays is disposed in the first splice tray mounting area. A tray is disposed in the second splice tray mounting area.

A sludge digester including a vessel and floating cover. The vessel includes a sidewall and an interior volume configured to receive and contain sludge. According to one embodiment, the cover comprises a frame structure that is constructed and arranged to form a skirt member formed at a periphery of the cover and extending downwardly into the vessel, and a continuous ballast ring attached to a lower portion of the skirt member and configured to form a trough member with an interior surface of the skirt member. The sludge digester may also include a guide system coupled to the sidewall and the skirt member and configured to allow vertical displacement of the cover with change in volume of at least one of a gas and a sludge contained in the vessel beneath the cover.

A sludge digester including a vessel and floating cover. The vessel includes a sidewall and an interior volume configured to receive and contain sludge. According to one embodiment, the cover comprises a frame structure that is constructed and arranged to form a skirt member formed at a periphery of the cover and extending downwardly into the vessel, and a continuous ballast ring attached to a lower portion of the skirt member and configured to form a trough member with an interior surface of the skirt member. The sludge digester may also include a guide system coupled to the sidewall and the skirt member and configured to allow vertical displacement of the cover with change in volume of at least one of a gas and a sludge contained in the vessel beneath the cover.

A floating roof leveling and protection apparatus comprising a plurality of isolators having bases being formed of a protective material to prevent an internal metallic internal roof support leg from directly contacting a tank bottom, a body extending axially and centered therefrom, a tapered end for insertion into the roof support leg, a fluid passage, an engagement means engaging the inner perimeter of the roof support leg, and a drain and isolator spacers, whereby a user may place an isolator spacer on the isolator and insert isolators into the roof support legs of a floating roof system to adjust the height of the roof support legs to level the floating roof thereby reducing the stress placed on the floating roof as the fluid level lowers, thus preventing damage to the bottom of a tank when the fluid level is decreased and the roof support legs contact the tank's bottom.

A floating roof leveling and protection apparatus comprising a plurality of isolators having bases being formed of a protective material to prevent an internal metallic internal roof support leg from directly contacting a tank bottom, a body extending axially and centered therefrom, a tapered end for insertion into the roof support leg, a fluid passage, an engagement means engaging the inner perimeter of the roof support leg, and a drain and isolator spacers, whereby a user may place an isolator spacer on the isolator and insert isolators into the roof support legs of a floating roof system to adjust the height of the roof support legs to level the floating roof thereby reducing the stress placed on the floating roof as the fluid level lowers, thus preventing damage to the bottom of a tank when the fluid level is decreased and the roof support legs contact the tank's bottom.

Method and apparatus for raising a floating roof included in a storage tank whereby a first and a first opposite force are applied between a floor in the storage tank and an internal surface of the floating roof. An additional set of forces are also provided and are constrained according to the first and first opposite force, not only in magnitude, but in position. By constraining these forces to be applied orthogonally to the floating roof, horizontal shear forces can be resisted thus reducing the likelihood of failure of a cribbing unit. By increasing these forces, the roof is raised.

The invention relates to a storage facility for the storage of highly volatile hydrocarbons, comprising at least one vertical round tank (I) which is equipped with a floating cover (5), covering the liquid surface, in the form of a floating roof or a floating ceiling, wherein an annular space (8) formed between the cover (5) and tank wall (3) is sealed by means of flexible sealing elements (9) and wherein fittings (12, 13) for automatic control of overpressures and under pressures in the space (4) under the cover (5) are integrated into the cover (5). The fittings (12, 13) of the at least one round tank (I) are connected to a vapour line (14), the upper end of which is led out of the tank (1) and is in turn connected to a separate vapour expansion tank (15), wherein the round tank (I) and the vapour compensation tank (15) form a closed system.

The invention relates to a storage facility for the storage of highly volatile hydrocarbons, comprising at least one vertical round tank (I) which is equipped with a floating cover (5), covering the liquid surface, in the form of a floating roof or a floating ceiling, wherein an annular space (8) formed between the cover (5) and tank wall (3) is sealed by means of flexible sealing elements (9) and wherein fittings (12, 13) for automatic control of overpressures and under pressures in the space (4) under the cover (5) are integrated into the cover (5). The fittings (12, 13) of the at least one round tank (I) are connected to a vapour line (14), the upper end of which is led out of the tank (1) and is in turn connected to a separate vapour expansion tank (15), wherein the round tank (I) and the vapour compensation tank (15) form a closed system.

An automatic aeration device includes a first floating roof, a second floating roof and a movable valve. The first floating roof has a through hole and a first enclosure. The second floating roof is disposed in the through hole and has a second enclosure. The movable valve is disposed above the first floating roof and the second floating roof and has a plate which has an outer wall and an inner wall. The outer wall is mounted in the first enclosure and has a plurality of first vent holes. The inner wall is mounted in the second enclosure and has a plurality of second vent holes. The automatic aeration device further includes a plurality of balls mounted between the first enclosure and the outer wall, and mounted between the second enclosure and the inner wall.