The Unique Hazard of Cooking Oil & Grease Fires

Commercial kitchens in restaurants, food courts, hotels, and cloud kitchens operate at extreme heat using large deep fat fryers, griddles, and open flame cooking ranges. Cooking oils (vegetable oils, animal fats, and ghee) have an auto-ignition temperature exceeding 350°C (660°F). When grease catches fire, it poses hazards that standard fire extinguishers cannot handle.

Why Water and Standard Extinguishers Fail Catastrophically

• Never Use Water on Oil Fires: Water sinks beneath superheated oil and instantly vaporizes into steam, creating a massive fireball explosion that scatters burning grease across the room.
• Why ABC Powder Can Be Ineffective: Standard dry chemical powder may knock the flames down momentarily, but because the oil temperature remains well above its auto-ignition point, the fire frequently reignites within seconds.
• CO2 Blast Hazard: High-pressure CO2 gas can violently splash molten oil out of fryers, spreading fire to curtains, exhaust hoods, and kitchen staff.

The Science of Saponification: How Wet Chemical (K-Type) Works

AUREX K-Type (Wet Chemical) Extinguishers utilize a specialized potassium acetate/citrate based alkaline liquid solution. When discharged over hot cooking oil:

• Saponification: The alkaline agent chemically reacts with the hot fatty acids in cooking oil, turning the surface into a thick, soapy foam blanket.
• Oxygen Starvation: The foam layer completely cuts off the supply of oxygen to the burning fuel.
• Rapid Cooling: The wet mist absorbs immense thermal energy, cooling the oil below its flashpoint to prevent rekindling.
• Gentle Low-Velocity Mist: The custom applicator nozzle sprays a fine, soft mist that never splashes burning liquid out of the deep fryer.

Compliance and Kitchen Best Practices

According to fire safety regulations (NFPA 10 & IS: 15683), all commercial food preparation operations must have certified K-Type fire extinguishers mounted within 30 feet of cooking equipment. In addition, installing kitchen hood fire suppression systems ensures automated round-the-clock defense.