Flammable / Combustible Liquid Storage

Laboratories

Where scientific research and development is conducted and analyses are performed within the building.  Where procedures are carried out by techniques ranging from having an unaided person use crude tools to running an automated analysis system with computer controls, data storage, and elaborate readouts. Procedures also often include sampling, measurement, and calculations.

Flammable Liquid Storage (quantities > 500L)

Where more than 500 litres of flammable liquid having a flash point below 37.8°C and having a vapour pressure not more than 275.8 kPa (absolute) at 37.8°C is stored in buildings or open areas.  The flash point is the minimum temperature at which a liquid within a container gives off vapour in sufficient concentration to form an ignitable mixture with air near the surface of the liquid.

Flammable Liquid Storage (quantity 250L Class I)

Where more than 250 litres of Class I flammable liquid is stored in buildings or open areas.

Class I liquids are also subdivided into A, B, and C. Class IA liquids, have a flash point below 22.8°C and a boiling point below 37.8°C.  Class IB liquids have a flash point below 22.8°C and a boiling point at or above 37.8°C, and Class IC liquids, are those liquids having a flash point at or above 22.8°C and below 37.8°C.  When a liquid having a flash point at or above 37.8°C is being processed, stored, handled or used at a temperature at or above its flash point, it shall be treated as a Class I liquid.

Combustible Liquid Storage (quantities > 500L)

Where more than 500 litres of combustible liquid having a flash point at or above 37.8°C and below 93.3°C liquid is stored in buildings or open areas.

The flash point is the minimum temperature at which a liquid within a container gives off vapour in sufficient concentration to form an ignitable mixture with air near the surface of the liquid.