Hazardous area

In electrical engineering , a hazardous area (also known as a potentially explosive atmosphere) is defined as an environment that consists of any concentrations of flammable gases , vapors , mists or combustible dusts. Though the goal of all hazardous area equipment is to prevent an explosion, the methods that they use vary depending on their manufacture and intended application. Precision Digital manufactures a wide range of rugged meters and controllers designed for quick and easy display of a variety of process signals in harsh or hazardous areas. These signals include 4-mA, 0-V, strain gauge , pulse, thermocouple and RTD.

Our hazardous-area instruments are approved by FM, CSA, ATEX,. The definition of the hazardous area zones represent the likelihood of hazardous gas, dust or other hazards being present in a working area.

Group C—Atmospheres containing a flammable gas, flammable liquid-produced vapor, or combustible liquid-produced vapor whose MESG is greater than 0. IDENTIFYING ZONE ZONE AND ZONE HAZARDOUS AREA S 1. Flammable Substance – this needs to be present in a relatively high quantity to produce an explosive mixture (e.g. gas, vapours, mists and dusts). Oxygen – oxygen is required in high quantities and in combination with the flammable. An industrial area is considered a hazardous area when it contains three fundamental components: A flammable substance (which can be a gas, liqui or solid), an oxidizer, and a source of ignition. The flammable substance can be anything from gasses and liquids such as hydrogen, gasoline and kerosene, to solid particulate such as dust or small fibers. A “ hazardous area ” is defined as an area in which the atmosphere contains, or may contain in sufficient quantities, flammable or explosive gases, dusts or vapours.

Classification -IEC and ATEX Standards.

In such an atmosphere a fire or explosion is possible when three basic conditions are met. Three main subdivisions exist: Zone is that part of hazardous area in which a flammable atmosphere is continuously present. Zone is that part of a hazardous area in which flammable atmosphere is likely to occur in normal. Zone is that part of a hazardous area in which flammable. The hazardous room is either protected with 1-hour barriers, or it is protected with sprinklers.

A fire and explosion can end up with devastating consequences, resulting in serious injuries or death of employees and others, as well as considerable damage to property. Hazardous Areas and Basic Risk Control Measures. Electrical equipment in hazardous areas is a critical part of the some of the industries most valuable sites and assets.

The auto-ignition temperature of the hazardous material (temperature or T rating). The likelihood of the hazard being present in flammable concentrations (zones). Equipment used in areas where explosive concentrations of dusts or vapors may exist must be equipped with special wiring and other electrical components for safety purposes. Zone - An area in which combustible dust, as a clou is occasionally present during normal operation in sufficient quantity to be capable of producing an explosive concentration of combustible dust in a mixture with air.

Zone - An area in which combustible dust, as a clou. Production facilities contain, or may contain, flammable gases and vapors in normal operations. In the right concentration with air, these can form an explosive environment that is ignitable by hot surfaces, electrical arcs, and sparks.

To prevent this from happening,. So while a Zone certified device can be used safely in either Zone or it cannot be taken into a Zone area.

They are used to set a perimeter around dangerous areas such as construction sites or locations with overhead machinery.