Basics Of Explosion Protection Basics Of Explosion Protection-Books Pdf

Basics of explosion protection Basics of explosion protection
17 Dec 2019 | 76 views | 0 downloads | 22 Pages | 313.95 KB

Share Pdf : Basics Of Explosion Protection Basics Of Explosion Protection

Download and Preview : Basics Of Explosion Protection Basics Of Explosion Protection

Report CopyRight/DMCA Form For : Basics Of Explosion Protection Basics Of Explosion Protection



Transcription

Basics of explosion protection, Terms and explanations. of explosion, protection, The explosion protection ordinance ExVO 11 ProdSV Definition of terms. The explosion protection ordinance ExVO 11 ProdSV regulates. the placing on the market of devices protective s ystems and com. ponents intended for use in potentially explosive atmospheres By an explosion is meant an exothermic reaction of material gas. and is the German transposition of the Directive 94 9 EC The ordi vapor mist or dust that takes place at a very high speed of reac. nance describes the essential health a nd safety requirements and tion The risk of an explosion exists wherever there is the p. mandatory conformity assessment procedures The explosion pro lity of an explosive atmosphere This is possible wherever dust. tection ordinance is therefore mainly aimed at manufacturers of flammable gases or liquids are manufactured processed trans. devices maintenance test and s ales personnel ported or stored Such hazardous atmospheres can be present for. instance in chemical industries gas stations refineries power. Like Directive 94 9 EC the explosion protection ordinance exclu plants paint shops vehicles sewage plants grain mills airports. des the following equipment from its scope The following is an grain silos and filling plants. extract of exceptions medical devices explosive substances o r. unstable chemicals personal protective equipment seagoing ves Explosion hazards. sels offshore systems and products for military, Explosion hazards only exist in locations. EN 60079 0 Electrical equipment for explosive atmosphe in which ignitable concentrations of flammable substances can. res general requirements exist under normal operating conditions or in the event of. faults and when these conditions provide the probability that. EN 60079 0 lays down general requirements for the design and a dangerous substance to air mixture is enough to form an ex. testing of electrical equipment required for the hazardous area plosive mixture. The following standards of the EN 60079 series describe the tech. nical implementation of different protection types. where the explosive or ignitable mixtures can come in contact. with a source of ignition and continue to burn after ignition. Flameproof enclosure EN 60079 1, Pressurized enclosure EN 60079 2 Explosive mixture generic term. Powder filling EN 60079 5, Oil immersion EN 60079 6 An explosive mixture is a mixture of gases or vapors mists or d.
Increased safety EN 60079 7 capable of propagating a reaction after ignition. Intrinsic safety EN 60079 11, Protection type n EN 60079 15 Potentially explosive atmosphere. Encapsulation EN 60079 18, Intrinsically safe electrical systems EN 60079 25 A potentially explosive atmosphere contains gases vapors mists. Optical radiation EN 60079 28 or dusts mixed with air as well as the usual filler materials that can. explode spontaneously under atmospheric conditions see a lso. EN 60079 11 Intrinsic safety i Explosive mixture This can occur wherever dust f lammable ga. ses or liquids are manufactured processed t ransported or stored. Apart from the intrinsic safety ignition protection all methods of. protection attempt to contain an explosion on the inside of t he Potentially explosive atmosphere hazardous. housing and to prevent the penetration of an ignitable gaseous. mixture A hazardous explosive atmosphere is a mixture containing con. centrations of flammable gases or vapors that when ignited can. Ex protection, Protection with intrinsic safety is based on a different approach cause damage to persons directly or indirectly through an e xplosi. It limits the electrical energy in a circuit to such an extent that in on see also Hazardous explosive atmosphere. creased temperatures sparks or arcs are incapable of generating. the energy needed to ignite a potentially explosive a tmosphere Hazardous area. Due to the limitation of electrical energy these circuits are mainly A hazardous area is an area in which there is a risk of explosion i e. suited for use in the field of measuring control and i nstrumentati a hazardous explosive atmosphere can occur due to local o pera. on and offer some considerable advantages c ompared to other ting conditions Such hazardous atmospheres can be present for. protection types An intrinsically safe circuit can therefore be instance in chemical industries gas stations refineries power. maintained or connected under live conditions w ithout the need plants paint shops vehicles sewage plants grain mills airports. for a hot work permit the easy to use systems are also economical grain silos and filling plants. thanks to the use of inexpensive components Last but not least. there are also many suppliers of components with protection type. more turck com www turck com Edition I 2014 501, Basics of explosion protection. Terms and explanations, Ignition triangle Secondary explosion protection.
An ignition is only possible if three factors are present at the same Secondary explosion protection consists of measures with which. time the ignition of a hazardous atmosphere is prevented For this pur. oxygen pose the electrical equipment is designed so that. the equipment does not form an effective ignition source and. the combining of ignition source and potentially explosive at. mosphere is prevented, the penetration of ignition into the surrounding explosive at. mosphere is prevented, see also Primary explosion protection. Electrical equipment featuring ignition, ignition source fuel. protection class Intrinsic Safety, IEC EN 60079 11. Possible ignition sources, Intrinsically safe and associated electrical equipment.
hot surfaces, flames and hot gases By intrinsic safety is meant the reduction of energy in an intrinsi. mechanically generated sparks cally safe circuit so that a thermal effect or spark is i ncapable of. electrical installations igniting a potentially explosive atmosphere under specified test. transient currents conditions, static electricity, lightning ultrasonic energy TURCK devices for use in explosion hazardous locations comply. with protection type intrinsic safety The devices are categorized. as intrinsically safe equipment and associated equipment This di. air 21 oxygen stinction is clearly indicated by the marking of the devices see. pure oxygen section Marking of equipment Intrinsically safe electrical equip. oxygen releasing compounds potassium permanganate etc ment consists of devices that are provided exclusively with intrin. sically safe circuits They can be installed d, irectly in the explosion. Combustible substances, hazardous area provided that the necessary requirements are ob. Gases and dusts arising from flammable liquids and solid mate served example an approved N AMUR sensor in accordance with. rials and present in the correct concentration for an explosion. EN 60947 5 6 or transmitter, Explosive limits, Associated equipment is equipment that incorporates non intrin.
A mixture is only explosive if the concentration is within certain sically safe circuits as well as intrinsically safe circuits Intrinsically. material specific limits These limits are called the upper and lower safe equipment may be connected to associated equipment pro. explosion limits and are listed in appropriate tables vided that all essential conditions for this kind of i nterconnected. assembly are fulfilled For example an isolating s witching ampli. Flash point fier is classed as associated equipment and the connected NAMUR. sensor as intrinsically safe equipment, The flash point is the lowest temperature at which a liquid r eleases. sufficient vapors that can be ignited when close to an energy sour Associated equipment must be installed outside of the Ex area or. ce and extinguished when the energy source is removed must be protected additionally by means of another protection. type e g flameproof enclosure or pressurized enclosure A num. Primary and secondary explosion protection ber of TURCK devices are approved for zone 2 enabling the i nstal. lation of a device in the Ex area All TURCK devices with intrinsically. Primary and secondary explosion protection measures are used t o safe circuits such as the interface module types are c lassified as. prevent explosions associated equipment, Primary explosion protection Simple electrical equipment. Primary explosion protection consists of measures with which t he Simple components and simple equipment that do not generate. formation of a hazardous atmosphere can be prevented or store more than 1 5 V 0 1 A and 25 mW do not require a test. Avoiding the use of flammable liquids certificate and are classified as simple electrical equipment e g. Increasing the flash point thermocouples This equipment is defined in the standard EN. Limiting the concentration 60079 14, Natural and technical ventilation. Monitoring the concentration, see also Secondary explosion protection. 502 Hans Turck GmbH Co KG Tel 49 208 49 52 0 Fax 49 208 49 52 264. Basics of explosion protection, Terms and explanations.
Categories, The subdivision of group II equipment is based on the different. Intrinsically safe and associated electrical equipment are subdivi ignition energy of the flammable materials The different groups. ded into three categories according to EN 60079 11 The s ubdivi are classified by capital letters in ascending alphabetical order ac. sion is based on the fault probability in the intrinsically safe circuit cording to the hazard risk of the associated materials Materials. in conjunction with the possibility of ignition belonging to group C require less ignition energy than Group A. materials see Tab 1, Category ia, Category ia indicates that the electrical equipment should not be T1 T2 T3 T4 T5 T6. able to ignite a dangerous mixture during normal operation in the methane. event of a single fault and in the event of any combination of two. faults Intrinsic safety must be maintained when two independent II A acetone ethyl alcohol benzines acetaldehyde. ethane i amyl diesel fuel ethyl aether, faults occur at the same time Components of any equipment of ethyl acetate acetate aviation. category ia that are susceptible to faults must therefore be ammonia n butane fuels. available in triplicate benzene n butyl fuel oils, acetic acid alcohol n hexane. Category ib carbon, Category ib states that no ignition must occur in normal operati propane.
on in the event of a fault The intrinsic safety must be e nsured in toluene. the event of a fault A fault could be the failure of a safety relevant town gas ethylene. component With category ib equipment safety related compo coal gas. nents must therefore be provided in duplicate II C hydrogen ethylene carbon. Category ic no authorized regulations available, Category ic denotes that no ignition must occur in normal o pe. ration From 2011 this protection type replaces protection nL for Tab 1 Division of flammable materials groups and temperature. use in zone 2 The benefits of intrinsically safe circuits are thus also classes. available in this zone, Temperature class, Ignition protection class n EN 60079 15. The temperature class is the maximum permissible surface tempe. Devices with ignition protection class n must only be installed in rature of a device The explosion protected apparatus can also be. zone 2 or 22 The devices must not provide any ignition sources in approved for several temperature classes depending on techni. normal operation no maintenance must be carried out during the cal and financial considerations. operation This must be ensured by means of suitable marking and. mechanical locking Depending on the protection type the lowest possible tempera. ture class is thus usually achieved with relatively extensive techni. Groups and temperature classes cal effort and accordingly high expense The effort required for. intrinsic safety is relatively low in comparison Only intrinsically. Electrical equipment for use in explosion hazardous areas is c lassi safe equipment that is installed d irectly in the explosion hazar. fied into groups and classes based on the likelihood of an explosi dous area requires a temperature class The specification of a tem. on hazard This is of special importance in terms of safety a nd fi perature class for associated e quipment is not required. nancial considerations because it determines the requirements. that must be met by the electrical equipment The division into. groups is based on the location where the equipment is going to. Group I classified equipment may be used in mines susceptible. to f iredamp and must conform to EN 60079 and additional mi. ning standards e g EN 50303, Group II classified equipment may not be used in mining appli. cations susceptible to firedamp but in all other explosion ha. zardous areas, Ex protection, Group II classified equipment is used in all explosion hazardous. areas except mining applications susceptible to firedamp H ow. ever group II devices must be further classified depending o n the. application area in which they are used and the different flamma. ble substances and ignition energy involved A further s ubdivision. of group II is therefore necessary and also useful for financial. more turck com www turck com Edition I 2014 503, Basics of explosion protection.
Terms and explanations, Ignition temperature Devices classified as Group I firedamp use the prefix M e g M1 i n. Basics of explosion protection exposed to the potential hazards of a potentially explosive atmos instance in chemical industries gas stations

Related Books

William Butler Yeats poems

William Butler Yeats poems

William Butler Yeats poems Publication Date 2012 Publisher Poemhunter com The World s Poetry Archive William Butler Yeats 13 June 1865 28 January 1939 William Butler Yeats was an Irish poet and playwright and one of the foremost figures of 20th century literature A pillar of both the Irish and British literary establishments in his later years he served as an Irish Senator for

Seamus Heaney Death of a Naturalist

Seamus Heaney Death of a Naturalist

An Analysis of the Themes of Death Decline and

An Analysis of the Themes of Death Decline and

existing scenario of religious beliefs of different classes of society in one of his poems Church Going in a realistic manner His poem Church Going chronicles the account of that time when Language in India www languageinindia com ISSN 1930 2940 13 7 July 2013 Shabnum Iftikhar M A Political Science M A English Literature ELT An Analysis of the Themes of Death Decline and

The Word That Causes Death s Defeat Monoskop

The Word That Causes Death s Defeat Monoskop

The word that causes death s defeat poems of memory Anna Akhmatova translated with an introductory biography critical essays and commentary by Nancy K Anderson 1st ed p cm Includes bibliographical references and index ISBN 0 300 10377 8 alk paper 1 Akhmatova Anna Andreevna 1889 1966 Translations into English 2 Akhmatova Anna Andreevna 1889 1966 I Anderson

death poems Red Wheel Weiser

death poems Red Wheel Weiser

death poems Russ Kick editor Classic Contemporary Witty Serious Tear Jerking Wise Profound Angry Funny Spiritual Atheistic Uncertain Personal Political Mythic Earthy and Only Occasionally Morbid Kick death poems 97 8193 88 7504 5 5219 5 www redwheelweiser com ISBN 978 1 938875 04 5 U S 21 95 Jane Austen Mary Jo Bang Willis Barnstone Charles Baudelaire William Blake

DISC Self Assessments 24x7

DISC Self Assessments 24x7

develop and use more of your natural strengths while recognizing improving upon and modifying your limitations Then because we can easily see and hear these behaviors we can quickly and accurately read other people and use our knowledge to enhance communication and grow our relationships Please Note Any behavioral descriptions mentioned in this report are only tendencies for your

Biblical Exegesis John Piper

Biblical Exegesis John Piper

Of course defining the ultimate goals of Biblical exegesis in this way assumes that the exegete is convinced that the Scriptures do mediate truth However many exegetes do not share this conviction The goal I have described so far does not apply to them That is why I described it as an ultimate goal There is a more immediate goal that I as an

Metonymy and Synecdoche in the New Testament

Metonymy and Synecdoche in the New Testament

or rejecting the validity of the suggested analysis and for its ultimate reexpression Remember that other more idiomatic expressions very likely exist in a given receptor language The user may even dispute the identification of some occurrences as actually being metonymy or synecdoche Incorporating concise citations from several English versions has enhanced the value of the list of

Kenmore Elite Canister Vacuum Cleaner

Kenmore Elite Canister Vacuum Cleaner

Vacuum Cleaner Help Line 1 877 531 7321 8 00am 5 00pm EST M F Use amp Care Guide Manual de Uso y Cuidado Kenmore Elite Canister Vacuum Cleaner Aspiradora Sears Brands Management Corporation Estates IL 60179 USA www kenmore com www sears com

ANNUAL REPORT 2009 2010 University of Oklahoma

ANNUAL REPORT 2009 2010 University of Oklahoma

Annual Report Table of Contents sponsored the event and served as break out group facilitators for the case study These companies included Bank of Oklahoma Conoco Phillips Devon Energy RiskMetrics Group and Williams Company There were eleven break out groups with approximately 10 15 students per group consisting of sophomores juniors and seniors Members of the Price College of

Course Schedule 2019 Spring Christ for the Nations Institute

Course Schedule 2019 Spring Christ for the Nations Institute

Welcome to the Spring 2019 course schedule We are excited about the upcoming semester and want to be sure you are aware of some important details NEW STUDENTS Please be advised you will be required to attend all the NEW STUDENT ORIENTATIONS January 9 amp 10 during registration week of your first semester FOR MORE INFORMATION CONTACT Enrollment Services 214 302 6438 admissions