we will look at what defines Zone 0, Zone 1 and Zone 2 hazardous area classifications and the considerations for specifying lighting into each area. Such areas include a residence or office where the only risk of a release of explosive or flammable gas would be such things as the propellant in an aerosol . Area (mm2) CFD BS EN 60079-10-1:2009 1 5.0 5.0 0.0936 12.3 - 61.7 2 5.0 2.5 0.0326 6.17 - 30.8 Non-Incendive standard defined for Electrical equipment Area classification is not simply intended to identify hazardous areas on process plants where design has already been completed using only operational and economic factors as influence, but to be. The following is a definition of each. This level of risk is represented by classifying the hazardous area as Zone 0, Zone 1 or Zone 2 (for gas, vapour and mist atmospheres) or Zone 21 or Zone 22 for dust atmospheres. Group define the type of hazardous material and (partly) the location of the surrounding atmosphere. Zones A Zone defines the general nature - if it is a gas or dust - and the probability of hazardous material being present in an ignitable concentration in the surrounding atmosphere. Hazardous Area Classification and Control of Ignition Sources This Technical Measures Document refers to the classification of plant into hazardous areas, and the systematic identification and. The definition of the hazardous area zones represent the likelihood of hazardous gas, dust or other hazards being present in a working area. The extent of the Hazardous area zone 2. Oil and Gas Zone Classifications:A) Hazardous Area Classification 1) Zone - 0 2) Zone - 1 3) Zone - 2B) Hydrogen Sulfide (H2S) Zone Classification . Division 2 Locations with fewer chances of hazard but can exist with due to unwantedinterference. North American industries have historically classified hazardous areas as either Division 1 or 2 based on the NEC or CEC. Zones - Broken into gas and dust groups. The Zone system has three levels of hazard for gas or dust. The definition according to IEC60079-10-1 is "an area in which an explosive gas atmosphere is present continuously or for long periods or frequently". Hazardous areas are classified into 3 zones based upon the frequency of the occurrence and duration of an explosive gas atmosphere, as follows: Zone 0 Area in which an explosive gas atmosphere is present continuously or for long periods or frequently. Before going to the step -by-step method for performing electrical area classification, it should be explained that a classified (hazardous) area is defined by three parameters; these being 1) class, 2) group, and 3) division. For explosion hazards caused by flammable liquids or gases, the following zones are defined: So a zone 0 is the most hazardous zone and a zone 2 is a less hazardous zone. Zone 1 Zone 2 IIC - Acetylene and Hydrogen; IIB + H2 - Hydrogen; IIB - Ethylene; IIA - Propane; Groups - Zone 20, 21 and 22 . For example, an area containing gasoline could be classified Class I, Group D, Hazardous Zones Classifications Gas Zone Definitions. Class II combustible dusts are grouped into one of three (3) groups: E combustible metal dusts, F combustible carbonaceous dusts or G other combustible dusts. If a pressure sensor is ATEX approved you can use device category 1 G in zone 0, device category 2 G in zone 1 and device category 3 G in zone 2 for gas applications. This is also one of the first steps when composing an Explosion Protection Document. The following hazardous area zone definitions are from IEC 60079-10. Zone 0 is a hazardous area in which an explosive atmosphere is present continuously for long periods of time or will frequently occur. DIVISION 1 - Class I, Division 1 hazardous locations are defined (as per NEC code Article 500) as follows: 1. Wolf R-50 & R-55 Rechargeable Torch WOLF R-50 & R-55 Rechargeable Torch Technical Information THE CURRENT STANDARD . Which pressure sensor design is suitable for which hazardous area zone is given in the data sheet or in the EC type examination certificate. Also known as non-hazardous or ordinary locations, these locations are determined to be neither Class I, Division 1 or Division 2; Zone 0, Zone 1 or Zone 2; or any combination thereof. As a guide for Zone 0, this can be . 60079-18 ISA 60079-18 . Comparison of Zone 2 and Division 2 TABLE 1 - AREA CLASSIFICATIONS Division 1: Where ignitable concentrations can exist all of the time or some . These generally give rise to areas classied as Zones 0, 1, and 2 respectively. Example - Hazardous Area Classification Definition (s) Zone 0 (hazardous area) An area in which an explosive gas-air mixture is continuously present or present for long periods. Area's are divided into zones. Class I Class I Zone 0 Zone 2 Zone 1 Zone 1 ISA 60079-18 ISA 60079-18 CSA C22.2 No. leakage from gas pipework flanges, fittings, etc. 2 of hazardous classification ATEX/ IEC Ex Device declaration Explanation table based on Safety Instructions Liquiphant M/S (XA00108F-G) Equipmentgroup- ATEX IECEx coversthisequipmentclassclassification(e.g.Ga/Gb) ZoneClassification Zonesareclassified mixtures Zone2 Zone1 Zone0 Fluid according according toATEX theprobabilityof the occurrence of Employers may use the zone classification system as an alternative to the division classification system for electric and electronic equipment and wiring for all voltage in Class I, Zone 0, Zone 1, and Zone 2 hazardous (classified) locations where fire or explosion hazards may exist due to flammable gases, vapors, or liquids. Depending on the presence of combustible dusts or ignitable fibers and flyings, the hazardous area is classified in three zones: Zone 20, Zone 21 and Zone 22. In both the above zone classification the probability of explosion severity reduces when we move from zone 0 (or zone 20) to zone 2 (zone 22). Hazardous areas are classified into 3 zones based upon the frequency of the occurrence and duration of an explosive gas atmosphere, as follows: Zone 0 Area in which an explosive gas atmosphere is present continuously or for long periods or frequently. zone 1 is an area that is classified 'as a place in which an explosive atmosphere consisting of a mixture with air or flammable substances in the form of gas, vapours and mists is likely to occur occasionally during normal operation', whereas zone 2 is an area that is classified 'as a place in which an explosive atmosphere consisting of a mixture Zone 0 - A place in which explosive atmosphere consisting of a mixture with air of Group is divided in three groups where Group I is reserved for mining locations. Groups - Class I, Zone 0, 1 and 2 . Type Area Brief Definition 1 Indoor General Purpose 2 Indoor Protection against angled dripping water 3, 3R, 3S Zones 0, 1 and 2: Atmospheres with explosive gases and vapours (AS2380; AS/NZS/IEC 60079) Zone 0 Area. The Wolf Rechargeable range are torches manufactured by Wolf Safety Lamp to provide lighting in Zone 1, Zone 0, Zone 21 or Zone 20 hazardous areas - the LED torches are for use in potentially explosive atmospheres according to the ATEX Directive. Zones 0, 1, and 2 relate to gas, and zones 20, 21, and 22 relate to dust. This process is called hazardous area classification. 1910.307 (g) (2) Zone 2, within hazardous area classification, is a place in which an explosive atmosphere (from gas, vapour, mist or spray) is not likely to occur in normal operation but, if it does occur, will persist for a short period only - e.g. An oversimplification of this example is shown in Table 1. NFPA 70 NEC Zone Classification System The Zone Classification System is offered as an alternative to the Class and Division system. The four steps involved in hazardous area classification are: Determine the type of hazard or "class" that might be presentcombustible gas (Class I), combustible dust (Class II), or fibers (Class III). Zone 0, 1 2 . Key parameters to be considered include liquid ash . If a pressure sensor is marked for . Zone 1 Zone 1 is a hazardous area in which an explosive atmosphere is likely to occur occasionally in normal operation. This level of risk is represented by classifying the hazardous area as Zone 0, Zone 1 or Zone 2 (for gas, vapour and mist atmospheres) or Zone 21 or Zone 22 for dust atmospheres. Division 1 and 2 Zone 0, 1 and 2 A (acetylene) IIC (acetylene & hydrogen) B (hydrogen) C (ethylene) IIB (ethylene) Table 1. Gain a better understanding of the definition of a Hazardous Location and area classification as well as the UL and C-UL Certification for North America. North America Hazardous classified location,Zone Classification Class I Location consisting of flammable gases or vapors in an amount to createa hazard. Class I Zone 2 Hazardous Areas. Source: Rules and Regulations for the Classification of Mobile Offshore Units, Part 7, Safety Systems, Hazardous Areas and Fire, June 2013, Lloyd's Register, Global Standards Zone 0 Group II is for explosive gases (Zone 0, 1 and 2) and Group III is for explosive dusts (Zone 20, 21 and 22). Hazardous area zones where flammable gases may be present are usually defined and marked on Site Area Classification Drawings. - 1 2 (Class 1, . What is zone Classification What is zoning Classification Zoning classification Zone 0,1,2 Zone 20,21,22Zoning requirements Difference between zone 0,1,2 & 2. Identify the specific "group" for the hazardous substance (Group A through Group G). Zone 2. NEW METHODS FOR HAZARDOUS AREA CLASSIFICATION FOR EXPLOSIVE GAS . as zones, equipment groups, gas groups, dust groups and temperature classes. Those locations in which ignitable concentrations of flammable gases or vapours can exist under normal operating conditions. It may exist because of repair, maintenance operations, or leakage. (Hazardous Area Classification) . In this article we will look at what defines Zone 0, Zone 1 and Zone 2 hazardous area classifications and the considerations for specifying lighting into each area. This article covers the requirements for the zone classification system as an alternative to the division classification system covered in Article 500 for electrical and electronic equipment and wiring for all voltages in Zone 0, Zone 1, and Zone 2 hazardous (classified) locations where fire or explosion hazards may exist due to flammable gases,. (Mifor installation in a hazardous location, both the symbol "Ex" or "AEx" and the . Now, with the changes to both codes, hazardous areas containing gases and vapors (Class 1) can be reclassified as Zone 0, 1, or 2. . Gases, Vapors and Mists IEC 60079-10.1 Classification of areas - Explosive gas atmospheres Dusts

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