A fire sprinkler system according to one aspect of the present disclosure includes a pipe having a first pipe portion and a second pipe portion. The first pipe portion includes a wall having a first wall thickness, and the second pipe portion includes a wall having a second wall thickness that is greater than the first wall thickness. The fire sprinkler system further includes structure coupled to the pipe and defining a sealed chamber between the structure and at least the first pipe portion, and a sensor for sensing a pressure in the sealed chamber. Example corrosion monitoring devices and methods for monitoring corrosion in pipe systems, including fire sprinkler systems, are also disclosed.

A fire suppression apparatus for a vehicle includes: a docking unit disposed on an exterior panel of a vehicle body, the exterior panel configured to cover an interior space of the vehicle wherein the docking unit comprises a hole through which a fire-fighting hose or a spray nozzle, which is connected to the fire-fighting hose, for supply of fire-fighting water pass to be coupled to the docket unit; a supply pipe having a first end connected to the docking unit; and a nozzle assembly arranged in the interior space in the vehicle and connected to a second end of the supply pipe, the nozzle assembly being configured to spray the fire-fighting water, which is supplied through the supply pipe from the fire-fighting hose or the spray nozzle, in order to respond to the outbreak of a fire in the interior space of the vehicle.

A fire suppression apparatus for a vehicle includes: a docking unit disposed on an exterior panel of a vehicle body, the exterior panel configured to cover an interior space of the vehicle wherein the docking unit comprises a hole through which a fire-fighting hose or a spray nozzle, which is connected to the fire-fighting hose, for supply of fire-fighting water pass to be coupled to the docket unit; a supply pipe having a first end connected to the docking unit; and a nozzle assembly arranged in the interior space in the vehicle and connected to a second end of the supply pipe, the nozzle assembly being configured to spray the fire-fighting water, which is supplied through the supply pipe from the fire-fighting hose or the spray nozzle, in order to respond to the outbreak of a fire in the interior space of the vehicle.

The invention relates to a constant-pressure valve (45), in particular for an alarm valve station (100) of a sprinkler system (200), having a fluid inlet (16), a fluid outlet (15), a flow channel between the fluid inlet and the fluid outlet, and a control piston (3, 8) which is arranged in the flow channel and which is movable back and forth between a standby position and a triggering position and which has a first piston surface (S.sub.1) facing toward the flow channel and has a second piston surface (S.sub.2).

It is proposed according to the invention that the constant-pressure valve has a switching chamber which is separate from the flow channel and which has a switching pressure inlet (4) in fluid communication with the switching chamber, wherein the second piston surface (S.sub.2) faces toward the switching chamber (4a), wherein the constant-pressure valve (45) has a securing element (21) which is coupled to the control piston (3, 8) of the constant-pressure valve (45) and which, in the standby position, absorbs the forces acting on the first piston surface (S.sub.1) of the control piston (3, 8).

Attic fire protection systems and methods for the protection of sloped attic spaces having large roof spans over eighty feet up to one hundred feet (80-100 ft.). The systems and method provide for a five-branch system with sprinklers having a directional spray interleaved between sprinklers having a uniform radial spray at the peak ridge and sprinklers having a uniform radial spray at the eave of the attic space. The systems and methods define a hydraulic demand with a total flow rate of under 175 GPM.

Attic fire protection systems and methods for the protection of sloped attic spaces having large roof spans over eighty feet up to one hundred feet (80-100 ft.). The systems and method provide for a five-branch system with sprinklers having a directional spray interleaved between sprinklers having a uniform radial spray at the peak ridge and sprinklers having a uniform radial spray at the eave of the attic space. The systems and methods define a hydraulic demand with a total flow rate of under 175 GPM.

Antifreezes, which include glycerol or a mixture of alkylene glycol and glycerol, water and an organic acid salt, are provided. Exemplary antifreezes include at least about 45 vol. % water, greater than 48 to about 55 vol. % glycerol, 0.1 to 1.75 wt. % of a salt of an organic acid having one or more carboxylic acid groups, and optionally, one or more buffers. Wet sprinkler systems containing the antifreeze, methods of controlling a fire using the antifreeze and methods of preventing a wet sprinkler system from freezing are also provided.

Antifreezes, which include glycerol or a mixture of alkylene glycol and glycerol, water and an organic acid salt, are provided. Exemplary antifreezes include at least about 45 vol. % water, greater than 48 to about 55 vol. % glycerol, 0.1 to 1.75 wt. % of a salt of an organic acid having one or more carboxylic acid groups, and optionally, one or more buffers. Wet sprinkler systems containing the antifreeze, methods of controlling a fire using the antifreeze and methods of preventing a wet sprinkler system from freezing are also provided.

An alarm valve station (80) of a fire extinguishing system (100) includes a fire extinguishing system valve (1) having a housing (2, 3) which has a fluid inlet chamber (8), a fluid outlet chamber (9) and a closing body (4a) reciprocable between a blocking state and a release state, wherein the fluid inlet chamber (8) and the fluid outlet chamber (9) are separated from each other in the blocking state and communicate with each other in fluid-conducting relationship in the release state. In particular it is proposed that the evaluation unit is connected in signal-conducting relationship to one or more actuators, and is adapted to control the actuator or actuators by the control commands, wherein the alarm valve station preferably has one or more sensors and the evaluation unit is connected in signal-conducting relationship to the sensor or sensors and is adapted to control the actuator or actuators in dependence on the sensor data present thereat.

Wet fire protection systems and methods for the protection of a stored commodity are provided. The system includes a supply portion coupled to a water supply and a demand portion including a plurality of sprinklers disposed above the commodity with each sprinkler having an operating pressure range. The plurality of sprinklers are interconnected by a network of pipes filled with water to provide each sprinkler with an initial pressure of water. A pressure control assembly is disposed between the supply portion and the demand portion to withhold fluid pressure from the supply portion from pressurizing the demand portion for a predetermined withholding period following actuation of at least one sprinkler in response to a fire.