Requirements for installation of Fire Sprinkler

# Requirements for installation of Fire Sprinkler

Requirements for installation of Fire SprinklerFrom NFPA tables according to hazard We get four important notes which used in our design. Maximum spacing between two sprinkler,Minimum spacing between two sprinkler,Maximum spacing between sprinkler and wall,Minimum spacing between sprinkler and wall.

## Requirements for installation of Fire Sprinklers

### What is the requirements for installation of  Fire sprinkler ?

From NFPA tables according to hazard We get four important notes which used in our design:
• Maximum spacing between two sprinkler equal to (4.6 m).
• Minimum spacing between two sprinkler equal to (1.8m)
• Maximum spacing between sprinkler and wall equal to ( Half of the space between two sprinkler )=(4.6/2 = 2.3 m).
• Minimum spacing between sprinkler and wall equal to 10..2 cm.for easy maintenance.

### Area of sprinkler operation (ft^2) and Density(gpm/ft^2)

 Area of sprinkler operation (ft^2) and Density(gpm/ft^2)

### Sprinkler distribution light hazard .at density =.1 gpm/ft^2

• Area of sprinklers operation =1500 ft^2
• Protection area per sprinkler = 225 ft^2
• Number of working sprinklers = 1500/225 = 6.666 = 7 sprinklers
Sprinkler distribution ordinary hazard at density = .15 gpm/ft^2
• Area of sprinklers operation =1500 ft^2
• Protection area per sprinkler =130ft^2
• Number of working sprinklers=1500/130 =12 sprinklers

### Return bend

• To prevent sediment buildup,return bends shall be installed in all shipboard sprinkler systems where pendent-type or dry pendent -Type sprinklers are used in wet systems.
• Consideration shall be given concerning the intrusion of saltwater into the system.
• Specifically, sprinklers shall not be rendered ineffective by corrosion related to saltwater entrapment within the return bend.

 Pendent sprinkler

### Pendent sprinkler installation

 Pendent sprinkler installation

### Required sprinkler working pressure

 Required sprinkler working pressure

Note:for SI units, gpm=3.785 L/min, 1psi=0.0689 bar .