Why Understanding Fire Classes in India Matters

Fire safety compliance in India is non-negotiable. Whether you manage a warehouse, factory, office, or commercial kitchen, understanding the classification of fire is fundamental to workplace safety and legal compliance. The Bureau of Indian Standards (BIS) has established clear guidelines — specifically IS 2190 and IS 15683 — that define six classes of fire and mandate specific extinguishers for each. Using the wrong extinguisher for a fire can be catastrophic, potentially spreading the fire or causing serious injury. This comprehensive guide explains all fire classes in India and the correct extinguisher to use for each.

Class A Fires: Ordinary Combustibles

What are Class A Fires?

Class A fires involve ordinary combustible materials — wood, paper, cloth, rubber, plastics, and similar materials. These fires are the most common in workplaces. They spread by transferring heat through solid materials and require cooling and smothering to extinguish.

Real-World Examples of Class A Fires

Warehouse fires involving wooden pallets and cardboard boxes
Office fires from paper records and furniture
Factory fires from textile materials or rubber products
Garbage and waste storage fires

Recommended Extinguishers for Class A Fires

Water extinguishers, foam extinguishers (AFFF), and ABC dry powder are effective for Class A fires. Water cools the material below its ignition temperature, while foam creates a blanket to exclude oxygen. For general-purpose use in mixed environments, ABC dry powder (DCP) is versatile and widely used in Indian facilities.

Class B Fires: Flammable Liquids

What are Class B Fires?

Class B fires involve flammable and combustible liquids such as petrol, diesel, paint, solvents, oils, and other liquid fuels. These fires spread rapidly and produce intense heat. Water is ineffective and dangerous — it can cause the burning liquid to splatter.

Real-World Examples of Class B Fires

Petrol station fires
Automotive workshop fires with fuel and oil spills
Chemical plant fires involving paint and solvents
Warehouse fires with flammable liquid storage
Transformer oil fires in electrical substations

Recommended Extinguishers for Class B Fires

Use CO2 (carbon dioxide), foam (AFFF), or DCP (dry chemical powder). CO2 extinguishes by displacing oxygen and cooling. Foam extinguishers create a protective layer over the liquid. DCP powder smothers the flame. Never use water on Class B fires — it will spread the burning liquid.

Class C Fires: Flammable Gases

What are Class C Fires?

Class C fires involve flammable gases such as LPG (liquefied petroleum gas), CNG (compressed natural gas), acetylene, hydrogen, and methane. These fires burn at extremely high temperatures and require specialized extinguishing agents.

Real-World Examples of Class C Fires

LPG cylinder leaks and fires at homes and commercial kitchens
CNG pump and vehicle fires
Welding and cutting gas fires in fabrication workshops
Gas processing and storage facility fires

Recommended Extinguishers for Class C Fires

DCP (dry chemical powder) and CO2 are suitable for Class C fires. The gas supply must be shut off immediately to prevent re-ignition. In many cases, firefighting focuses on cooling and protecting surrounding structures until the gas supply is stopped.

Class D Fires: Combustible Metals

What are Class D Fires?

Class D fires involve combustible metals such as magnesium, sodium, potassium, titanium, and zirconium. These metals ignite at lower temperatures and burn with extreme intensity. Standard extinguishers are completely ineffective.

Real-World Examples of Class D Fires

Foundry and metal casting facility fires
Chemical laboratory fires with alkali metals
Automotive manufacturing fires (magnesium components)
Pyrotechnic and fireworks facility fires

Recommended Extinguishers for Class D Fires

Class D fires require specialized extinguishing agents. Dry sand and special dry powder agents designed for Class D (such as sodium chloride-based powders) are used. Standard extinguishers can react violently with combustible metals. Specialized Class D extinguishers are rare in typical Indian facilities and are found primarily in heavy industrial and chemical plants.

Class E Fires: Electrical Equipment

What are Class E Fires?

Class E fires involve live electrical equipment and appliances under electrical load. Examples include circuit breakers, transformers, switchboards, server equipment, and wiring. The electrical current makes water and other conductors extremely dangerous — they increase the risk of electrocution.

Real-World Examples of Class E Fires

Server room fires in data centers
Electrical switchgear panel fires in factories
Transformer fires in substations
Control panel fires in industrial facilities
Arc flash events and electrical equipment failures

Recommended Extinguishers for Class E Fires

CO2 extinguishers and clean agent extinguishers (non-conducting) are suitable for electrical fires. CO2 displaces oxygen without leaving residue. After the electrical supply is disconnected, the fire becomes a Class A, B, or D fire depending on the material burning. Important note: Class E is recognized in Indian BIS standards (IS 2190), though some international standards classify electrical fires differently.

Class F Fires: Cooking Oils and Fats

What are Class F Fires?

Class F fires involve cooking oils, fats, and greases at high temperatures, commonly seen in commercial kitchens and food service areas. These fires produce intense heat and water causes violent splattering and spread of burning oil.

Real-World Examples of Class F Fires

Commercial kitchen fires from deep-frying equipment
Canteen and food court fires
Industrial cooking facility fires
Oil refinery and processing plant fires

Recommended Extinguishers for Class F Fires

Wet chemical extinguishers are specifically designed for Class F fires. The wet chemical cools the oil and creates a foam blanket, preventing splatter. These extinguishers are mandatory in all commercial kitchens under Indian food safety regulations. Never use water or powder extinguishers on burning cooking oil — the results are dangerous and can cause severe burns.

Fire Classes in India: Quick Reference Table

Fire Class	Fuel Type	Common Examples	Correct Extinguisher	Do NOT Use
Class A	Ordinary Combustibles	Wood, paper, cloth, rubber, plastics	Water, Foam, ABC Powder (DCP)	CO2 (limited cooling)
Class B	Flammable Liquids	Petrol, diesel, paint, solvents, oils	CO2, Foam, DCP Powder	Water (spreads fire)
Class C	Flammable Gases	LPG, CNG, acetylene, hydrogen	DCP Powder, CO2	Water (ineffective)
Class D	Combustible Metals	Magnesium, sodium, potassium, titanium	Dry Sand, Specialized Class D Powder	Water, DCP, CO2 (reactions)
Class E	Electrical Equipment	Switchgear, transformers, servers, wiring	CO2, Clean Agent Extinguishers	Water (electrocution risk)
Class F	Cooking Oils & Fats	Deep-fryer fires, cooking fat fires	Wet Chemical Extinguishers	Water (violent splatter), Powder

Indian Fire Safety Standards: IS 2190 and IS 15683

The Bureau of Indian Standards (BIS) has established comprehensive standards for fire extinguishers and fire safety. IS 2190 defines portable fire extinguisher classifications and specifies which extinguisher must be used for each fire class. IS 15683 provides additional guidance on fire extinguisher selection and placement in industrial and commercial facilities. Every workplace in India is legally required to have the correct type and quantity of extinguishers based on occupancy risk assessment as per these standards. Compliance is verified during fire safety audits and insurance assessments.

Why Using the Wrong Extinguisher Can Be Dangerous

Using an incorrect extinguisher for a fire class is not just ineffective — it can be catastrophic. Water on a Class B fire spreads burning liquid across a wider area. Powder on a Class E fire under electrical load can conduct electricity and cause electrocution. Powder on a Class D metal fire can react chemically and intensify the fire. Incorrect agent selection has caused fires to spread beyond initial containment, resulting in property loss, injuries, and deaths. This is why training on fire classes and correct extinguisher use is mandatory under Indian workplace safety regulations (Building Code, OSHA equivalents).

Ensure Your Facility Is Fire-Safe

Every facility — warehouse, factory, office, kitchen, or commercial space — must have the correct fire extinguishers installed, accessible, and regularly inspected. Fire classification knowledge is not optional; it's a legal requirement for safety managers, facility operators, and all personnel responsible for emergency response. The cost of non-compliance can be severe: penalties, loss of operating licenses, liability in case of fire-related incidents, and most importantly, loss of life.

JSNM Engineers: Your Fire Safety Partner in Ahmedabad & Gujarat

At JSNM Engineers in Naroda, Ahmedabad, we have been serving Gujarat industries and businesses for over 11 years with professional fire safety solutions. We supply all classes of fire extinguishers — Class A, B, C, D, E, and F — tailored to your facility's specific fire risk profile. Our fire safety experts conduct risk assessments, recommend the correct extinguisher types and quantities per IS 2190 standards, provide professional installation, and ensure regular maintenance and hydrostatic testing. Whether you operate a warehouse, manufacturing unit, commercial kitchen, or office complex, we ensure your facility meets Indian fire safety compliance requirements.

Contact JSNM Engineers today:

Phone: +91 94267 68694
Location: Naroda, Ahmedabad
Website: jsnmengineers.in
Service Area: Ahmedabad, Gujarat, and pan-India

Don't gamble with fire safety. Let our experienced team ensure your facility has the right extinguishers, proper training, and complete IS 2190 compliance.

Fire Classes in India: Class A, B, C, D, E, F Explained with Extinguisher Guide