Fire Hydrant System

As SF Fire & Ventilation Systems, we provide engineered external fire hydrant systems designed as critical fire protection infrastructure installed around buildings and facilities. These systems ensure reliable water access for firefighting operations when first-response extinguishing methods are insufficient.

External hydrants are essential for enabling fire brigade intervention, supplying high-capacity water directly to firefighting vehicles and supporting effective fire control in large-scale incidents.

Regulatory Requirements

According to the Turkish Regulation on Fire Protection of Buildings, external hydrant systems are mandatory when:

• Buildings are located in specially planned settlement areas separate from general urban zones
• The total building footprint exceeds 5000 m²

In such cases, an external hydrant network must be installed.

Purpose and Operating Principle

External fire hydrant systems:

• Provide water supply for fires that cannot be controlled by initial intervention
• Enable fast water intake for fire brigade vehicles
• Support containment and suppression of large-scale fires
• Act as a primary external firefighting water source

Hydrant piping should be designed to cover the entire perimeter of the facility, preferably in a ring (loop) configuration.

Hydrant Spacing Requirements

Hydrant spacing is defined according to risk classification:

• Very high-risk areas: 50 m
• High-risk areas: 100 m
• Medium-risk areas: 125 m
• Low-risk areas: 150 m

In practical engineering applications, a spacing of 50 meters is recommended to ensure maximum coverage.

Additionally, hydrants should be positioned:

• Minimum distance from building: 5 m
• Maximum distance from building: 15 m

Hydraulic Design and Piping

• System flow rate is determined based on hazard classification and building requirements
• Pipe diameters are calculated using hydraulic design software
• Minimum pipe diameter for non-ring systems is 100 mm
• All design parameters are based on hydraulic engineering calculations

Technical Standards

External fire hydrant systems must comply with applicable Turkish Standards (TS). Common hydrant sizes include:

• DN80
• DN100
• DN150

DN100 is typically the standard size, while DN150 hydrants are used for higher capacity requirements. Hydrant discharge capacity varies depending on inlet and outlet dimensions.

System Safety and Design Features

To ensure operational reliability:

• One shut-off valve per approximately five hydrant units is recommended
• Drainage and water discharge systems must be included
• The system should be divided into controlled zones where applicable

These measures ensure that maintenance or repair work does not compromise the entire fire protection system.

Protection and Installation Considerations

For safe and effective operation:

• Hydrants must be protected against mechanical impact
• Directional and identification signage should be installed
• Underground pipelines must be clearly marked
• Accessibility for fire vehicles must be ensured
• Proper installation prevents damage during excavation works

Application Areas

External fire hydrant systems are widely used in:

• Industrial facilities
• Manufacturing plants
• Warehouses and logistics centers
• Commercial complexes and shopping malls
• Building perimeters
• Forest-adjacent zones
• Urban residential areas
• Energy and infrastructure facilities

Common Installation Issues

Improper installation can significantly reduce system efficiency. Common issues include:

• Incorrect piping design or inadequate hydraulic calculation
• Lack of drainage and frost protection
• Improper installation depth
• Absence of gravel drainage around hydrants
• Insufficient impact protection
• Poor accessibility and visibility

At SF Fire & Ventilation Systems, we deliver engineered external fire hydrant solutions based on correct design principles, ensuring reliable performance, full compliance with standards, and maximum fire safety effectiveness.