A firestop has a housing with a first tubular part that defines a first longitudinal end of the housing, and a second tubular part that defines a second longitudinal end of the housing. A passageway extends between the first and second longitudinal ends, is defined by at least the first and second tubular parts. When the firestop is installed in a building, the service components are to extend through the passageway. The firestop has a mating interconnection between the first and second tubular parts that permits the length of the housing between the first and second longitudinal ends to be adjustable between a maximum length and a minimum length. Intumescent material is supported by the housing and that swells in response to heat. The intumescent material being arranged to swell in response to heat in at least an inward direction.

A threaded fitting comprising a first plurality of threads from a first end of the fitting to a transition thread and a second plurality of threads from the transition thread to a second end of the fitting. The first plurality of threads is configured to provide a labyrinth type seal minimizing the migration of at least dust and/or gases across a thick-walled enclosure. The second plurality of threads is configured to engage a lock-nut in thin-walled enclosures, or a plurality of pre-formed threads within an aperture of thick-walled enclosures, for minimizing the migration of at least fluids/water across one of the thin- or thick-walled enclosure. The first and second plurality of threads are serially-arranged and may be used either thin or thick-walled enclosures to retard a passage of at least one of either gas, fluid, dust and flame.

A tubular fire stop assembly for a poured concrete structure defines at least a portion of a passage through the structure during use. The assembly has a base with a tubular sleeve, both encircling and extending along the passage. A fire ring is connected to the base and has a plate with a central opening encircling the passage. An intumescent ring has inner and outer sidewalls and opposing top and bottom walls. The intumescent ring is inside the base, encircles the passage and rests on the fire ring plate. A woven, galvanized wire mesh casing extends along the inner and outer sidewalls and the top wall of the intumescent ring.

A firestop collar (10) for sealing of openings, especially of line penetrations (12), that pass through walls (11) or ceilings has a frame (16) and a block (20) of optionally intumescent material disposed therein, and is characterized in that an intumescent inlay (22) is disposed between the block (20) and the frame (18).

A firestop collar (10) for sealing of openings, especially of line penetrations (12), that pass through walls (11) or ceilings has a frame (16) and a block (20) of optionally intumescent material disposed therein, and is characterized in that an intumescent inlay (22) is disposed between the block (20) and the frame (18).

A penetration part fireproof covering material used when a penetration part covered for fireproof is formed in a fireproof beam that is a fireproof constructional member that constitutes a wooden building, wherein the penetration part fireproof covering material is formed to have a tubular shape by stacking a plurality of gypsum board pieces (13a) formed from gypsum boards in a thickness direction and unitarily connecting the plurality of gypsum board pieces. The penetration part fireproof covering material is formed to have the tubular shape by stacking the plurality of gypsum board pieces that preferably have an annular shape and are cut out from commercially available gypsum boards having thicknesses of 9.5 mm to 25.5 mm while fixing the plurality of gypsum board pieces to each other preferably using metal fasteners such as staples, and unitarily connecting the plurality of gypsum board pieces.

A penetration part fireproof covering material used when a penetration part covered for fireproof is formed in a fireproof beam that is a fireproof constructional member that constitutes a wooden building, wherein the penetration part fireproof covering material is formed to have a tubular shape by stacking a plurality of gypsum board pieces (13a) formed from gypsum boards in a thickness direction and unitarily connecting the plurality of gypsum board pieces. The penetration part fireproof covering material is formed to have the tubular shape by stacking the plurality of gypsum board pieces that preferably have an annular shape and are cut out from commercially available gypsum boards having thicknesses of 9.5 mm to 25.5 mm while fixing the plurality of gypsum board pieces to each other preferably using metal fasteners such as staples, and unitarily connecting the plurality of gypsum board pieces.

A concrete structure with a corrugated bottom surface has a pipe passing through a passage in the structure. A fire stop assembly has a first portion with a split plate, split cage, split intumescent ring, split inner smoke ring and split outer smoke ring each fastened together to rotate together about a hinge on the split cage. The fire stop assembly has a second portion of the split plate, split cage, split intumescent ring, split inner smoke ring and split outer smoke ring fastened together to rotate together about a hinge. The first and second portions have free ends that spread apart to fit around the tube in an open position, and close around the tube in a closed position.

A concrete structure with a corrugated bottom surface has a pipe passing through a passage in the structure. A fire stop assembly has a first portion with a split plate, split cage, split intumescent ring, split inner smoke ring and split outer smoke ring each fastened together to rotate together about a hinge on the split cage. The fire stop assembly has a second portion of the split plate, split cage, split intumescent ring, split inner smoke ring and split outer smoke ring fastened together to rotate together about a hinge. The first and second portions have free ends that spread apart to fit around the tube in an open position, and close around the tube in a closed position.

The invention relates to an explosion-proof arrangement (10) with an explosion-proof housing (11) which has a wall opening (23) in a housing wall (12). The wall thickness (d) of the housing wall (12) is so small that it is not possible to form a thread there in order to screw in a connecting body (15) for a line to pass through or for receiving an assembly so as to ensure protection against flame transmission. According to the invention, a connecting body (25), which has a flange (38) with a flange face (39), is inserted into the wall opening (23). The flange face (39) delimits a flameproof gap (58) by way of the housing wall (12). The dimensions of a gap or intermediate space between the connecting body (25) and a boundary face (24) of the housing wall (12), which boundary face delimits the wall opening (23), are not important. The protection against flame transmission can be provided solely by the flameproof gap (58) between the flange face (39) and the housing wall (12).