Which category of fire hazard does paint fall into?

Since there are many categories of paints, clear oil and mixed oil cannot be evaluated one by one, so the fire protection grade of paint cannot be uniformly stated, but most of them belong to Class B fire protection, and a small number of special paints belong to Class A.

If there is no fire protection certification classification from the manufacturer, you must know the solvent and main component used in the paint, and then refer to the classification basis in the fire protection regulations to determine the fire protection classification level of the solvent and main component, and select the highest of the two. Fire protection level is used as the basis for classification.

The three common types of substances are liquids, gases and solids.

When classifying fire hazards of liquids, flash point is the main indicator, as follows:

Class A factory (warehouse): flash point <28°C (gasoline, methanol, ethanol etc.)

Category B factory (warehouse): 28℃ ≤ flash point <60℃ (turpentine, camphor oil, kerosene, etc.)

Category C factory (warehouse): flash point ≥ 60℃ (asphalt, lubricating oil, engine oil, etc.)

When classifying fire hazards of gases, the lower explosion limit is the main indicator, as follows:

Class A factory buildings (warehouses): Lower explosion limit <10% (hydrogen, coal gas, natural gas, methane, etc.)

Class B factory building (warehouse): lower explosion limit ≥10% (carbon monoxide, ammonia)

Note: Common Among the gases, except for carbon monoxide and ammonia, the rest are basically Class A.

When solids are classified into fire hazards, most of them use melting point and ignition point as the main indicators, as follows:

Category A factory buildings (warehouses): prone to spontaneous combustion or explosion, easy to encounter water Flammable solids that burn or explode, or are prone to burn or explode due to external force

Category B factory buildings (warehouses): flammable solids other than Category A

Category C factory buildings (warehouses): Combustible solids (wood, paper, plastic, foam, etc.)

Category D factory building (warehouse): flammable solids (phenolic foam, cement particle board, etc.)

Category E factory building (warehouse) ): Non-combustible solids (steel, bricks, cars, instrument lights)

Note: The fire hazards of Class C, D, and E can be combined with the combustion performance grades A, B1, and B2 of decoration materials.

Other fire hazard supplements:

Combustion-supporting gas: Category B (oxygen production or storage, air separation plant)

Combustible dust generated during the production process: B Category B (flour, starch, pulverized coal, coal powder, aluminum powder, metal polishing, etc.)

Storage of items that are prone to oxidation or spontaneous combustion due to heat accumulation: Category B (linoleum, oilcloth, oil paper, etc.)

Production of gas or liquid combustion for other purposes: Category D (boiler rooms, ceramic firing plants, etc.):

Pigments may contain heavy metals such as lead, cadmium, and iron.

Lead: nervous system, blood system, kidney system, reproductive system.

Chromium: respiratory tract, digestive tract, skin ulcers, nasal septum perforation.

Cadmium: respiratory tract, renal system.

Solvents and diluents contain toluene, xylene, etc.