FOAM SYSTEM FIRE PROTECTION

A foam fire suppression system extinguishes fires by discharging a mixture of water and foam concentrate through a network of pipes and nozzles or sprinkler heads. The resulting foam blanket works through three simultaneous mechanisms:

• Smothering — The foam layer cuts off the oxygen supply to the fire
• Cooling — The water content in the foam absorbs heat from the burning surface
• Separation — The foam barrier prevents flammable vapors from re-igniting

Unlike gaseous suppression agents that dissipate quickly, foam provides a persistent blanket that continues to suppress re-ignition — a critical advantage in high-hazard liquid fuel environments.

1. Foam-Water Sprinkler System

A closed-head system that discharges a foam-water mixture automatically when heat activates individual sprinkler heads. Ideal for flammable liquid storage rooms, paint storage, and loading bays. Designed per NFPA 16.

2. Foam-Water Spray System (Deluge)

An open-head deluge system that simultaneously discharges foam-water over the entire protected area when triggered. Used for transformer protection, aircraft hangars, and outdoor tank farms where rapid, total-coverage suppression is required. Designed per NFPA 15 and NFPA 11.

3. High-Expansion Foam System

Generates a large volume of foam (expansion ratio up to 1000:1) to rapidly fill enclosed spaces such as warehouses, basement storage areas, and tunnel infrastructure. Extremely effective for Class B fires in confined spaces.

4. Low-Expansion Foam System (AFFF / AR-AFFF)

Aqueous Film-Forming Foam (AFFF) and Alcohol-Resistant AFFF systems are used for surface application on flammable liquid spill fires. Commonly installed in fuel tank farms, oil & gas terminals, and petrochemical facilities.

Foam suppression systems are the specified solution for facilities involving flammable or combustible liquids, where standard water-based systems are either ineffective or prohibited. Typical applications include:

• Aircraft Hangars — Required by NFPA 409 for hangar classification; foam systems provide the rapid floor-level suppression needed for aviation fuel spill fires
• Flammable Liquid Storage Rooms — Warehouses and rooms storing Class I, II, and IIIA flammable liquids per NFPA 30
• Oil & Gas Facilities — Tank farms, loading racks, pump stations, and offshore processing areas
• Petrochemical Plants — Process areas handling hydrocarbons, solvents, and chemical compounds
• Power Plants & Substations — Transformer protection where oil-filled equipment poses fire risk
• Marine & Port Facilities — Fuel loading areas and vessel engine rooms
• Industrial Manufacturing — Paint booths, solvent storage, and dip tanks

Not sure whether foam or a gaseous system is right for your facility? Our engineers can help. You can also compare options by visiting our Gaseous Fire Suppression System page or our Water Spray System page.

Foam systems are often deployed alongside or integrated with other fire protection systems. Explore our complete range of fire fighting solutions:

• Fire Hydrant System — Manual suppression for large-scale industrial and commercial fires
• Sprinkler System — Automatic fire control for commercial and residential buildings
• Water Spray System — Fixed water spray for equipment cooling and exposure protection
• Wet Pipe System — The most common automatic sprinkler configuration for occupied buildings
• Dry Pipe System — For unheated spaces where pipes cannot hold standing water