Liquids that have flash points from 21oC up to & including 55oC are handled at or above the flashpoint.Continue Reading

Class 1 is more hazardous than Class 2, so Class 2 could be considered a “safer” or better area compared to Class 1.Continue Reading

Zone 21 is an area in which combustible dust is likely to occur in normal operation, and Zone 22 is an area in which combustible dust is not likely to occur in normal operation and, if it occurs, will exist only for a short period.Continue Reading

Area in which combustible dust is likely to occur in normal operation.Continue Reading

Zone 1 is an area in which a flammable atmosphere is likely to occur in normal operation, and Zone 2 is an area in which a flammable atmosphere is not likely to occur in normal operation and, if it occurs, will exist only for a short period.Continue Reading

The Group defines the type of hazardous material in the surrounding atmosphere. Groups A, B, C, and D are for gases (Class I only) while groups E, F, and G are for dust and flyings (Class II or III).Continue Reading

The electrical disciplines engineerContinue Reading

By looking at the HAC drawing where the area classification records can comprise detailed drawings with notes and/or can be in the form of tabulations. The area classification drawings should indicate sufficient scale to show all the main items of equipment and all the buildings in both plan and elevation.Continue Reading

Zone 1—Ignitable concentrations of flammable gases or vapours which are likely to occur under normal operating conditions. Zone 2: That part of a hazardous area in which a flammable atmosphere is not likely to occur in normal operation and if it occurs, will exist only for a short period.Continue Reading

Class II—Locations in which combustible dust (either in suspension, intermittently, or periodically) may or may not be insufficient quantities to produce explosive or ignitable mixtures. Class III—Locations in which ignitable fibres may or may not be insufficient quantities to produce explosive or ignitable mixtures.Continue Reading