What are the three classes of standpipe systems?
When designing a system, you first need to determine the supply pipe size, hose connection location, size, and pressure based on the standpipe classification. There are three classes of standpipe systems, they include Class I, Class II, and Class II.
What is a Class 1 standpipe system?
Class I standpipes are for trained firefighter use. They have a 2 ½-inch outlet and are capable of flowing a minimum of 250 gallons per minute (gpm) from each individual outlet. Each riser should be capable of flowing 500 gpm.
What is the purpose of a stand pipe?
Standpipe Systems consist of piping, valves, outlets, and related equipment designed to provide water at specified pressures and installed exclusively for the fire department or trained occupant use for the fighting of fires.
What is a Class 2 standpipe?
Class II – A Class II standpipe system shall provide 1 1/2 inch hose stations to supply water for use primarily by trained personnel or by the fire department dur- ing initial response. These are typically found in cabinets with 100′ of hose.
What is a Class 2 standpipe system?
Class II – A Class II standpipe system shall provide 1 1/2 inch hose stations to supply water for use primarily by trained personnel or by the fire department dur- ing initial response. They are required based on the use of the building or the height above or below fire department access.
How does a stand pipe work?
Within the context of a building or bridge, a standpipe serves the same purpose as a fire hydrant. The standpipe is then “sunk” into the hydrant, and the hose is connected to the exposed ends of the standpipe. The bar is then combined with the key, and is used to turn the hydrant on and off.
What standpipe class can be used by both occupants and fire personnel?
Class II standpipes
Class II standpipes are intended to be used by the occupants of the building, like fire extinguishers, and are equipped with a valve and 1.5-inch hose connection at each location.
What is a Class I standpipe system?
Class I – A Class I standpipe system shall provide a 2 1/2 inch hose connection for use primarily by trained personnel or by the fire department during initial response. This class has no hose attached.
What is the meaning of a pipe class?
Piping class or Pipe Class is a document that specifies the type of the components such as a type of pipe, schedule, material, flange ratings, branch types, valve types and valve trim material, gasket, and all the other components specific requirements to be used for different fluids under different operating conditions in a plant.
Can a Class 3 standpipe be used by a firefighter?
They do not have the same standards as Class I or Class III standpipes. They have a 1 ½-inch connection with single jacketed hose with a twist off type nozzle. They are only capable of producing 100 gpm. These should not be used by firefighters.
What is the minimum height for a standpipe system?
For installing a standpipe system, the building’s height is critical to consider. If a building whose uppermost story floor level is present at the elevation of more than 30 ft from its lowest level or the fire department’s lowest level, a Class III standpipe should be installed.