A fire resistant structure includes a bottom plate and a cover plate connected together, a heat insulation layer between the bottom plate and the cover plate, wherein the bottom plate includes a fire prevention opening, the fire prevention opening having a fire prevention opening cover nut, wherein one side of the fire prevention opening near the heat insulation layer is provided with a fire prevention opening filter, the fire prevention opening filter connected to the bottom plate. A fire arrester is provided on the cover plate, the fire arrester includes a fire arrester shell, an accommodating cavity provided therein, a fire blocking core in the accommodating cavity, and a connection portion extending from one end of the fire arrester shell, wherein a plurality of connection holes are provided on the connection portion. An end face of the fire blocking core is flush with an end face of the connection portion.

A method of custom manufacturing a flame arrestor assembly configured to extinguish a flame propagating therethrough. The method includes creating a customized flame cell using an additive manufacturing technique, which generally includes forming a body and forming one or more channels in the body. The one or more channels define a flow path configured to transfer heat from a flame front propagating through the flow path to the body. The method also includes providing a housing, and securely arranging the flame cell within the housing.

A method of custom manufacturing a flame arrestor assembly configured to extinguish a flame propagating therethrough. The method includes creating a customized flame cell using an additive manufacturing technique, which generally includes forming a body and forming one or more channels in the body. The one or more channels define a flow path configured to transfer heat from a flame front propagating through the flow path to the body. The method also includes providing a housing, and securely arranging the flame cell within the housing.

The invention relates to a ventilating firestop (10), comprising a load-bearing mesh (12) fitted with an intumescent (14), wherein the mesh (12) is malleable to a completely or partially confined volume (22), and the intumescent (14) applied to the mesh (12) forms a stripe pattern of intumescent spaced apart and with ventilating openings (30) between the stripes. At least the intumescent (14) in a plane which is exposed by fire forms a fine mesh and rapidly expandable stripe pattern which, during the fire attack phase, seals the openings (30) and forms a fire-insulating shield (40), and the intumescent (14) located separately from the shield (40), after formation of the shield (40), is expandable to subsequently fills up the remaining volume (22) in the firestop (10).

A flame arrestor screw for a solenoid operated gas admission valve. The flame arrestor screw may include a screw body having a first end and an open end. The flame arrestor screw may include a gas passage extending from the open end along a longitudinal axis of the screw body and terminating at a terminal end within the screw body. A through hole may extend through the screw body transverse to the gas passage and in fluid communication with the gas passage.

Described are flame retardant, porous plastic flame arrestors. The flame retardant, porous plastic flame arrestor is formed by irradiating a flame retardant polymer resin to achieve a fractional melt index, grinding the flame retardant polymer resin into a powder, and sintering the flame retardant polymer resin to form a porous structure. Irradiating the flame retardant polymer resin increases the resin's molecular weight and reduces the resin's melt index through crosslinking.

Described are flame retardant, porous plastic flame arrestors. The flame retardant, porous plastic flame arrestor is formed by irradiating a flame retardant polymer resin to achieve a fractional melt index, grinding the flame retardant polymer resin into a powder, and sintering the flame retardant polymer resin to form a porous structure. Irradiating the flame retardant polymer resin increases the resin's molecular weight and reduces the resin's melt index through crosslinking.

An equipment dry bay is provided. The equipment dry bay includes at least one partition that subdivides the equipment dry bay into a plurality of compartments, wherein the at least one partition includes a plate, and at least one flame arrestor positioned within the plate and providing vapor and fluid communication between a first compartment and a second compartment of the plurality of compartments, the at least one flame arrestor configured to vent combustion gases in the first compartment into the second compartment.

A pressure relief device for an explosion-proof housing. The pressure relief device has a lamellae arrangement having a plurality of lamellae. The lamellae are arranged in a transverse direction with distance to one another and thereby limit flow channel between two lamellae respectively. Each flow channel establishes a flow connection between a first opening and a second opening of the lamellae arrangement that are arranged with distance to one another in flow direction. Each flow channel has a non-straight preferably meandering or wave-shaped extension between the first opening and the second opening and can be flameproof as an option. Water drops that accumulate inside the flow channel are retained due to the contact with the two adjacent lamellae due to adhesion forces. In doing so, the pressure relief device is configured as protection against throughflow of water without additional measures.

A pressure relief device for an explosion-proof housing. The pressure relief device has a lamellae arrangement having a plurality of lamellae. The lamellae are arranged in a transverse direction with distance to one another and thereby limit flow channel between two lamellae respectively. Each flow channel establishes a flow connection between a first opening and a second opening of the lamellae arrangement that are arranged with distance to one another in flow direction. Each flow channel has a non-straight preferably meandering or wave-shaped extension between the first opening and the second opening and can be flameproof as an option. Water drops that accumulate inside the flow channel are retained due to the contact with the two adjacent lamellae due to adhesion forces. In doing so, the pressure relief device is configured as protection against throughflow of water without additional measures.