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2: For the requirements for electrical and electronic. These applications will - due to browser restrictions - send data between your browser and our server. Quick Tips #124.1. Note to paragraph (g)(5)(ii)(B) of this section: An example of such a required marking is "Class I, Zone 0, AEx ia IIC T6." Electrical equipment installation in atmosphere with flammable gases or vapors, flammable liquids, combustible dusts, ignitable fibers or flyings represents a risk for fire and explosion. A material may have a relatively low autoignition temperature yet if its flash-point is above the ambient temperature, then the area may not need to be classified. 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 1.1.2 This recommended practice provides information on specific flammable gases and vapors, flammable liquids . Home About Us News Hazardous Environment Classifications: NEC vs IEC, Posted March 11, 2019 by springercontrols. July 2019 *unless risk assessment states a higher or lower category is required. API RP 505, Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Zone 0, Zone 1, and Zone 2 (as incorporated by reference in 250.198). Other ignition sources can also be present, like static electricity. There are several ways of how to perform hazardous area classification, all described in several standards or codes of practise. >> For Gas/Vapor this would be Zone 2. July 2021 ADNOC . The use of EPL and ATEX Category directly is an alternative for "s" marking. Area classification - atozwiki.com November 2020 Temporary Refuge Hazardous area equipment is categorized into category-1 for Zone 0 or Zone 20, category-2 for Zone 1 or Zone 21, and category-3 for Zone 2 or Zone 22. Some manufacturers claim "suitability" or "built-to" hazardous areas in their technical literature, but in effect lack the testing agency's certification and thus unacceptable for the AHJ (Authority Having Jurisdiction) to permit operation of the electrical installation/system. The lower explosion limit of a substance is the lowest concentration (in volume percentages for gases and liquids) of a gas or a vapor in air of producing a flash of fire in the presence of an ignition source. 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. Hazardous Areas - North America Classification - Engineering ToolBox Hazardous area classification - EnggCyclopedia | For Dust this would be Zone 21. Container Accessories Hazardous Environment Classifications: NEC vs IEC, IEC (International Electrotechnical Commission), Group E Metal dusts (eg. Flammable liquids with a high flash point are less hazardous than liquids Where there is potential for an explosive atmosphere, special precautions are needed to prevent fires and explosions. The Regulations define 3 zones that can exist within a hazardous area: Zone 0 - A place in which an explosive atmosphere is present continuously or for long periods. Area Classification for Mechanical Data Sheet - API 610 In the United States, the most commonly followed system is the NEC (National Electric Code), while the rest of the world generally follows the IEC (International Electrotechnical Commission). And there are three corresponding zones for dust: Zone 20, Zone 21 and Zone 22. (between 0,1 and 10% of the time). How to perform Hazardous Area Classification? Informational Note No. Under the "Zone" system, hazards are defined for gas as Zone 0, 1 or 2, with 0 as the highest hazard, and for dust as Zone 20, 21 or 22, with 20 as the . There are four zones in the IEC classification system: Zone 0: An area in which an explosive atmosphere is present continuously or for long periods. This is because Zone 0 usually classifies areas for gas storage or containment, and any lighting required would be used on a small and portable basis for visual inspection, e.g. Group II is for explosive gases (Zone 0, 1 and 2) and Group III is for explosive dusts (Zone 20, 21 and 22). July 2020 This can be achieved by blanketing with nitrogen or carbondioxide. Ways to ensure this level of safety are non-arcing design and limitation of the temperature of the equipment. Group defines the type of the hazardous material in the surrounding atmosphere. Sources of Determined to be none of the above. Hazardous areas are those defined as areas of potential explosion risk due to the presence of flammable gas or vapor. 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. Flour, wood/sawdust, plastic dust). Conversely if the same material is heated and handled above its flash-point, the area must be classified for proper electrical system design, as it will then form an ignitable mixture.[5]. Group II is for explosive gases (Zone 0, 1 and 2) and Group III is for explosive dusts (Zone 20, 21 and 22). When comparing Divisions and Zones, Division 2 is equivalent to Zone 2, but Division 1 is equivalent to either Zone 0 or 1. A special standard for instrumentation is IEC/EN 60079-27, describing requirements for Fieldbus Intrinsically Safe Concept (FISCO) (zone 0, 1 or 2) (This special standard has been withdrawn, and has been partially replaced by: IEC/EN60079-11:2011 and IEC/EN60079-25:2010)[1], A special standard for instrumentation is IEC/EN 60079-27, describing requirements for Fieldbus Non-Incendive Concept (FNICO) (zone 2) (This special standard has been withdrawn, and has been partially replaced by: IEC/EN60079-11:2011 and IEC/EN60079-25:2010)[9]. 15 4. Many people have heard terms like Class I, Division 2, Group E, or ATEX zone 21 but many of our customers only know what certification they require with little understanding of what they mean, so we thought it would be appropriate to write a blog post to help customers understand the broader implications of these terms. Flameproof "d" - This protection technique is permitted for equipment in the Class I, Zone 1 locations for which it is approved. National Electrical Code (NEC) and the 1998 Canadian Electrical Code (CEC) now recognize the use of the Zone system for classification of hazardous areas. This is exactly defined as the limiting concentration of oxygen below which combustion is not possible, independent of the concentration of fuel. We don't collect information from our users. Equipment shall be approved not only for the class of location, but also for the ignitable or combustible properties of the specific gas, vapor, dust, or fiber that will be present. Division 2 is equivalent to Zone 2, while Division 1 is either Zone 0 or 1. Within a working area or installation an ignition can be created by many factors. This equipment is intended for use in Zone 1 (gases) or Zone 21 (dusts). Offshore Accommodation Module A: Yes. Examples are: production facilities in the food industry, chemical plants, oil & gas, and the pharmaceutical industry etc. Category 2 equipment may be used in zone 1 or zone 2 areas. It may exist because of repair, maintenance operations, or leakage. Informational Note No. Documentation requirements likewise vary. HAZARDOUS AREA HAZARDOUS AREA CLASSIFICATIONS - Academia.edu Classifying hazardous locations: Class, Division, or Zone? When working in or specifying equipment for use in hazardous environments, we see a lot of confusion in the industry regarding the different certifications and requirements. Laboratory Container Hazardous Area Classifications D103222X012 Product Bulletin 9.2:001 September 2019. 6: For further information on electrical systems for hazardous (classified), Informational Note No. Workshop Container, Intelligent pressurised container | MUD logging cabin, Battery energy storage system (BESS) container, Laboratory container | workshop container | Equipment containers, Temporary refuge shelter | Toxic gas refuge | Safe haven, Offshore accommodation cabin | office container, Reefer container | Refrigerated container, Intelligent waste water treatment container, IDENTIFYING ZONE 0, ZONE 1, AND ZONE 2 HAZARDOUS AREAS, Temporary refuge (TR) shelter, toxic gas refuge (TGR), Containerised waste water treatment plant. Atmospheres containing non-conductive dust. A potential few examples of this are: The air space inside a tank of petrol Substances characterization Consequences . Comparison of Division and Zone Systems - IAEI Magazine See Figure S-1 for an explanation of this marking. The NEMA enclosure rating or IP code may also be indicated, but it is usually independent of the Classified Area suitability. with hazardous areas EC-Type Examination Certificate BAS 01 ATEX 7251 , for additional certificates see www.pepperl-fuchs.com Group, category, type of protection II (1) G D [EEx ia] IIB (-20 C Ta 60 C) [circuit(s) in zone 0/1/2] Output EEx ia IIB Voltage U0 25.9 V Current I0 184 mA Power P0 1.2 W Type of protection [EEx ia] The autoignition temperature is the lowest temperature at which the substance will ignite without an additional heat or ignition source (at atmospheric pressure). When the concentration of gas or vapor is above the UEL the gas mixture is too rich to burn. A: No. >> NEC: Class II, Division 1, Group F. | IEC: Zone 20, Group IIC. This paper will discuss and review the current approaches and solutions of dealing with these HSE concerns, especially with the involvement of hazardous and potentially flammable and explosive chemicals. In instances of areas within the same facility classified separately, Class I, Zone 2 locations may abut, but not overlap, Class I, Division 2 locations. Cookies are only used in the browser to improve user experience. This is an important factor in the classification of hazardous areas. The basis for the classification into zones is the duration of the presence of the potentially explosive atmosphere: The longer it is present, the more critical the zone. EN 16985 concerning spray cabins and powder coating cabins, EN 12779 related to extraction systems for hot sawdust and chips, EN 60079-10 series, 2020 version for gas and dust explosion hazard, NPR 7910 series for gas and dust explosion hazard based on EN 60079-10-1, 2015 version, EN 13617 for fuel dispensers at filling stations. PDF Hazardous locations - CEC classifications IECEx Karandikar Certification This process is called hazardous area classification. . Equipment approved for Class I, Division 1 or Class 1, Division 2 shall, in addition to being marked in accordance with (c)(2)(ii), be marked with the following: Class I, Zone 1 or Class I, Zone 2 (as applicable); Applicable gas classification groups; and. The Raytec SPARTAN range includes dedicated luminaires for both Zone 1 and Zone 2 areas as well as industrial applications. Group C materials have a MESG less than 0.75mm and a MIC ratio less than 0.80 (but greater than 0.40, which would put it in Group B.) PDF Product Bulletin Hazardous Area Classifications September 2019 Zone 2: An area in which an explosive atmosphere is not likely to occur in normal operation, but if it does . The Zone system has three levels of hazard for gas or dust where the Division system has two. A light switch may cause a small, harmless spark when switched on or off. For example, a socket outlet labeled EEx'de' might have a case made to EEx 'e' and switches that are made to EEx 'd'. In an industrial plant, such as a refinery or chemical plant, handling of large quantities of flammable liquids and gases creates a risk of exposure. Equipment construction is such that it can withstand an internal explosion and provide relief of the external pressure via flamegap(s) such as the labyrinth created by threaded fittings or machined flanges. Zone 1 is an area in which an explosive atmosphere is likely to occur occasionally in normal operation. Temperature classification, except for intrinsically safe apparatus. Zone 1 Definition (ATEX). What is a Zone 1 hazardous area? - Pyroban Industrial electrical equipment for hazardous area has to conform to appropriate parts of standard: IEC-60079 for gas hazards, and IEC-61241 for dust hazards. >> For Gas/Vapor this would be Zone 0. D8 Hazardous areas - IACS Equipment shall be marked in accordance with paragraph (g)(5)(ii)(A) and (g)(5)(ii)(B) of this section, except as provided in (g)(5)(ii)(C). May 2021 Overview of Hazardous Areas | Expo Technologies LIFTING TEST to EN 1127-1): After the hazard area classification is completed, then the ignition assessment starts. Groups E, F, and G are for dusts and flyings (Class II or III). Then, the level of risk of an explosion is based on the frequency and duration of the occurrence of an explosive atmosphere. . Zones compares to classes and divisions in the Class/Division system. December 2022 1.1.1 This recommended practice applies to those locations where flammable gases or vapors, flammable liquids, or combustible liquids are processed or handled; and where their release into the atmosphere could result in their ignition by electrical systems or equipment. Much early equipment having Ex s protection was designed with encapsulation and this has now been incorporated into IEC 60079-18 [Ex m]. Hazardous Areas Classification | Switches International Pty (Ltd) This blog post will focus on the different hazardous location classifications and well follow up with another that discusses how equipment can be constructed and certified for use in these environments. In the United Kingdom, Sira and Baseefa are the most well known such bodies. HAZARDOUS VS. Entire Vapour space of storage tank. Subscribe 6.9K views 2 years ago Oil and Gas Zone Classifications: A) Hazardous Area Classification It's cable reimagined No DVR space limits. 14 4. Hazardous Area Classification is a study, in which is assessed, at witch locations of a plant, factory or company, high concentrations of flammable gases are present or can be released, in order to create an explosion hazard. 4: For further information on protection against static electricity and lightning hazards in hazardous (classified). Zone defines thegeneral nature if it is a gas or dust and theprobabilityof hazardous material being present in an ignitable concentration in the surrounding atmosphere. Exception No. Ex LIGHTER-THAN-AIR GASES & VAPOURS Vapour density of 0.75 is considered as the boundary between lighter and heavier gases / vapours as a safety measure HA of a leak source located in air Source of hazard 4.5 m. 8.0 m R 4.5 m H Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro .Add the Engineering ToolBox extension to your SketchUp from the SketchUp Pro Sketchup Extension Warehouse! Table 1. NFPA 70 NEC Articles 505 and 506 cover the requirements for the Americanized Zone classification system as an alternative to the Class and Division classification system. What is an Explosion Protection Document? Typical gas hazards are from hydrocarbon compounds, but hydrogen and ammonia are also common industrial gases that are flammable. March 2022 For example, a Class 1, Div 1 area where Group A may be present would be defined as an area where flammable gases or vapors may be present under normal operating conditions. See below for further details: Division system sample marking I Flammable gases or vapors may be present, 1 Ignitable concentrations of hazards exist under normal operation conditions and/or where the hazard is caused by frequent maintenance or repair work or frequent equipment failure, E Combustible metal dusts: aluminum, commercial alloys and magnesium, III Easily ignitable fibers or flyings may be present, 0 Ignitable concentrations of flammable gases or vapors which are present continuously or for long periods of time, 1 Ignitable concentrations of flammable gases or vapors which are likely to occur under normal operating conditions; may exist frequently because of repair/maintenance operations or leakage; or equipment is operated in a manner that equipment breakdown/faulty operations could result in the release of ignitable concentrations of flammable gases or vapors and failure of the equipment, 2 Ignitable concentrations of flammable gases or vapors which are not likely to occur under normal operating conditions and if they do will only persist for a short period of time; or volatile flammable liquids, gases, or vapors are confined within closed containers/systems and can escape only as a result of an accidental rupture; or volatile flammable liquids, gases, or vapors are normally prevented by positive mechanical ventilation, but may become hazardous due to system failure, 20 Combustible dusts or ignitable fibers/flyings are present continuously or for long periods of time, 21 Combustible dusts or ignitable fibers/flyings are likely to occur under normal operating conditions; or may exist frequently because of repair/maintenance operations or leakage; or equipment is operated in a manner that breakdown/faulty operations could result in the release of ignitable concentrations of combustible dust or fibers/flyings and failure of the equipment, 22 Combustible dusts or ignitable fibers/flyings are likely to occur under normal operating conditions; or may exist frequently because of repair/maintenance operations or leakage; or equipment is operated in a manner that breakdown/faulty operations could result in the release of ignitable concentrations of combustible dust or fibers/flyings and failure of the equipment, Mines susceptible to firedamp (flammable mixture of gases naturally occurring in a mine, Explosive dusts Group III equipment is subdivided into three subgroups, A Atmospheres containing acetone, ammonia, ethyl alcohol, gasoline, methane, propane, or gases/vapors of equivalent hazard, A Atmospheres containing solid particles and fibers greater than 500 microns that could be suspended in air and settle out, B Atmospheres containing acetaldehyde, ethylene, or gases / vapors of equivalent hazard, B Atmospheres containing combustible dusts other than combustible metal dusts, C Atmospheres containing acetylene, hydrogen, or gases/vapors of equivalent hazard, C Atmospheres containing combustible metal dusts. Class 1/Div 2 ATEX Zone 2 Computers. 1: As a guide in determining when flammable gases or vapors are present continuously or for long periods of time, refer to ANSI/API RP 505-2018, Informational Note No. Adapters shall be used for connection to conduit or NPT-threaded fittings. The two general approaches are: Several techniques of flame-proofing exist, and they are often used in combination: Equipment has flameproof gaps (max 0.006" (150m) propane/ethylene, 0.004" (100m) acetylene/hydrogen), Equipment can be installed in ANY housing provided to IP54.A 'Zener Barrier', opto-isolator or galvanic unit may be used to assist with certification. The following Equipment Groups and Categories are applicable: Equipment in this category is only intended for use in the underground areas of mines, as well as those areas of surface installations of such mines endangered by firedamp and/or combustible dusts. In 29 CFR 1910.307(c)(2)(ii), OSHA requires all equipment used in a hazardous location to be marked with the class, group and operating temperature or temperature range for which it is approved. A Zone 0 location is a location in which one of the following . Explosions can cause significant damage along with severe injury or worse loss of life. The above groups are formed in order of how explosive the material would be if it was ignited, with IIC being the most explosive zone system gas group and IIA being the least. So for an explosion there must be enough fuel. Note to paragraph (c)(3) of this section: The National Electrical Code, NFPA 70, contains guidelines for determining the type and design of equipment and installations that will meet this requirement. Equipment should be tested to ensure that it does not exceed 80%[according to whom?] 1.1 Scope. January 2021 FEA Group defines thetypeof hazardous material and partly thelocationof the surrounding atmosphere . Identifying Zone 0, Zone 1, and Zone 2 Hazardous Areas. A list must be drawn up of every explosive material that is on the refinery or chemical complex and included in the site plan of the classified areas. Methane has a UEL of 17 vol%, which means when the concentration of methane in air is above the 17 vol% an explosion cannot occur even when an ignition source is present. The escaping (hot) gases must sufficiently cool down along the escape path that by the time they reach the outside of the enclosure not to be a source of ignition of the outside, potentially ignitable surroundings. The prevention of explosions in working environments is in most countries regulated in national laws and directives. Temporary Refuge (TR) Shelter Comparison of Zone 2 and Division 2 TABLE 1 - AREA CLASSIFICATIONS Division 1: Where ignitable concentrations can exist all of the time or some . d : HA - ha ea OA - oa Area classification - Divisions vs. zones Continuous hazard Intermittent hazard Hazard under abnormal conditions Zone 0 Zone 1 Zone 2 Division 1 Division 1 Division 2 Hazardous locations - CEC classifications Class I August 2021 RP 505 is referred to as the zone system. As a guide for Zone 0, this can be defined as over 1000 hours/year or >10% of the time. Powder Filling "q" -- This protection technique is permitted for equipment in the Class I, Zone 1 locations for which it is approved. Classification of areas and selection of equipment and wiring methods shall be under the supervision of a qualified registered professional engineer. ESS Container . Substance properties are specific for the amount of fuel needed to get an explosion when all other conditions are met. Use this hazardous area guide to NFPA 70 location classes, divisions & groups to understand potentially dangerous situations at a glance. Container Test BATTERY ENERGY STORAGE SYSTEMBESS) The inductance of the signal bell coils, combined with breaking of contacts by exposed metal surfaces, resulted in sparks, causing an explosion. Hazardous Areas - European Classification Standard - Engineering ToolBox Area's are divided into zones. October 2020 Offshore Living Quarter The disadvantage of standards with example installations, is that a huge safety factor is incorporated and thus relative large hazardous area are defined. What are 'Dark Factories,' and Do They Really Exist? October 2019 hazardous areas as the following: An area where a potential hazard (e.g., a fire, an explosion, etc.) In the United States, the hazardous location classification system is defined by the National Fire Protection Association (NFPA) 70, National Electric Code(NEC). Hazardous Area Classification - [PPT Powerpoint] The first thing to understand is that much like the metric vs imperial measuring systems, the United States uses its own methodology which differs from much of the world. In many industrial, commercial, and scientific settings, the presence of such an atmosphere is a common, or at least commonly possible, occurrence. This leads to a lot of the confusion in the global marketplace because certifying equipment to these different systems can be time consuming and expensive, so many companies may only certify to one or the other. All emergency versions, whether Zone 1 or Zone 2 can also be easily visually identified by their red end cap, encapsulating the emergency battery back-up.