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ATEX fans

ATEX fans. experience since 1985. Hoffmann La Roche (Basle, CH) transport of explosive, toxic and corrosive gases 2000 m³/h 70 mbar T° : - 50°C … + 200°C system pressure 8 bar 12 bar explosion resistance. 1985 biogas. Hofstetter (CH) transport of biogas (methane)

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ATEX fans

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  1. ATEX fans ATEX

  2. experience since 1985 Hoffmann La Roche (Basle, CH) • transport of explosive, toxic and corrosive gases • 2000 m³/h • 70 mbar • T° : - 50°C … + 200°C • system pressure 8 bar • 12 bar explosion resistance ATEX

  3. 1985 biogas Hofstetter (CH) • transport of biogas (methane) • up to 2000 Nm³/h with 180 mbar • 6 or 10 bar explosion resistance ATEX

  4. 1992 solvent vapour Hoffmann La Roche (Basle,CH) • solvent vapour • 200 m³/h • model ER10 • LRV- installation with 30 fan units ATEX

  5. 1993 to 1996explosion tests and certificatePTB (Physikalisch-Technische Bundesanstalt, Braunschweig) ER IIB3/100/520 zweistufig ER IIA/100/520 zweistufig ER IIB3/100/500 ER IIA/100/500 ATEX

  6. project ATEX 94/9/EG In January 1999 a project had been set up to extend the range of zone-0 fans and to receive the ATEX certificate in March 1999 the order of Sanofi Synthélabo (France) for 6 fans intensified our efforts the required new size had been incorporated into our project we took the necessary steps to receive the ATEX certificate ATEX

  7. sanofi 1999 Sanofi Synthélabo (F) • transport of solvent vapours • 1500 Nm³/h • system ER10 • up to today 20 units installed at this customer ATEX

  8. ATEX 100 - ATEX 137 99/92/EC (ATEX 137) is intended to complement the previously published 94/9/EC (ATEX 100a). These two directives cover different areas and are intended to achieve different objectives. Responsibilities and duties are shared between the manufacturer and user (employer).1999/92/EC (ATEX 137) • Covers health and safety protection of workers • Duties are placed on the employer • Intended to ensure that workers enjoy a minimum level of protection throughout all member states 1994/9/EC (ATEX 100a) • Covers products intended for use in hazardous areas • Duties are placed on the manufacturer/supplier of the product • Intended to facilitate the free movement of goods within the EU Both ATEX 137 and ATEX 100a became mandatory on 1st July 2003. and set out the minimum requirements. Member states are free to introduce more stringent measures if they wish. ATEX

  9. directive for manufacturersATEX 100 After 30 June 2003 products may be placed on the market in the EU territory, freely moved and operated as designed and intended in the expected environment only if they comply with directive 94/9/EC. Directive 94/9/EC provides Essential Health and Safety Requirements (EHSRs, listed at Annex II) for • non-electrical equipment intended for use in potentially explosive atmospheres and • equipment intended for use in environments which are potentially explosive due to dust hazards and • protective systems and for devices intended for use outside explosive atmospheres which are required for or contribute to the safe functioning of equipment or protective systems with respect to risks of explosion. ATEX

  10. group and category Group I comprises equipment intended for use in the underground parts of mines, and to those parts of surface installations of such mines, likely to become endangered by firedamp and/or combustible dust Group II comprises equipment intended for use in other places likely to become endangered by explosive atmospheres Our range of product come normally in application covered with this group, sub-divided into 6 categories ATEX

  11. category 1G (for zone 0) Cat. 1G comprises products designed to be capable of remaining in areas in which explosive atmospheres caused by mixtures of air and gases, vapours, mists or air/dusts mixtures are highly likely to occur and are present continuously, for long periods of time or frequently Equipment of this Category is characterised by integrated explosion protection measures functioning in such a way that: • in the event of a failure of one integrated measure, at least a second independent means of protection provides for a sufficient level of safety; or, • in the event of two faults occurring independently of each other a sufficient level of safety is ensured. ATEX

  12. category 2G (for zone 1) Cat. 2G comprises products designed to be capable of remaining in areas in which explosive atmospheres caused by mixtures of air and gases, vapours, mists or air/dust mixtures are likely to occur The explosion protection relating to this Category must function in such a way as to provide a sufficient level of safety even in the event of equipment with operating faults or in dangerous operating conditions which normally have to be taken into account. ATEX

  13. category 3G (for zone 2) Cat.3G comprises products designed to be capable of remaining in areas in which explosive atmospheres caused by mixtures of air and gases, vapours, mists or air/dust mixtures are less likely to occur and if they do occur, do so infrequently and for a short period of time only. The design of the products of this category must provide a sufficient level of safety during normal operation. ATEX

  14. There is the same classification for air/dust mixtures • Category 1D (for zone 20) • Category 2D (for zone 21) • Category 3D (for zone 22) • Actually, we have a complete range of solution other for the category 1D ATEX

  15. standard fan without specific risks designed without specific measurements standard design ATEX

  16. non-sparking design category 2 or 3 (G and/or D) prevention of the generation of sparks or hot surfaces by appropriate design motorEEx nA EEx e or EEx de(for FU) ATEX

  17. non-sparking design seal category 2 or 3 / gastight (G and/or D) gastight design to avoid escape of gas into the atmosphere or towards the motor motorEEX nA EEx e or EEx de(for FU) ATEX

  18. design ER non-sparking design seal category 2 (G and/or D) also under abnormal circumstances the fan must not generate any sparks or hot surfaces motorEEx nA EEx e or EEx de(for FU) ATEX

  19. design ER non-sparking design flame arresters seal category 1G ATEX

  20. category 1 cat.1 = (permanently explosive medium) requires additional measurements. Up to today all solutions are limited to gas (cat.1G), since dust (cat.1D) cannot pass the flame arresters. ATEX

  21. requirements for cat.1G protection measurements must guarantee • in the event of a failure of one integrated measure, at least a second independent means of protection provides for a sufficient level of safety; or, • in the event of two faults occurring independently of each other a sufficient level of safety is ensured solution: explosion resistant design + flame arresters ATEX

  22. requirements for cat.1G • the protective systems must be able to withstand an explosion inside the fan. • the protective systems must be arranged in such a way, that any dangerous chain reaction is impossible. Flames or deflagrations inside the fan must not escape and cause detonations outside. solution: design ER + flame arresters close to the fan proof by real explosion tests ATEX

  23. flame arresters each new type has been proofed (16x) with the fan by real explosion tests (according to EN 12874) to demonstrate the efficacy of the safety measurements ATEX

  24. Actuelly concept and design ER ATEX

  25. size and sensors • the design of the fan and the choice of the material is determined by the expected pressure and temperature in case of an explosion or in case of a fire. Also thermal reaction can cause a heating. The fan withstands an explosion shock without reduction of the safety function of the system. • the protective devices are equipped with sensors to indicate a fire or abnormal temperature. The sensors are connected with other elements to stop the process and to separate other parts of the installation. ATEX

  26. operating conditions Sensors measure the temperature at the inlet flame arresters to detect a fire and at the same time they indicate an abnormal temperature of the medium. Fans for category 1G are always designed for specificoperating conditions, which are given by • speed rate (rotation) • operating temperature • category of the media • pressure under no circumstances the fan can be used outside the range of these specifications ! ATEX

  27. risk analysis • hazard identificationwhich hazards exist under normal circumstances, which in the case of a fault (EN 1127-1) • risk estimationProbability of occurrence of the identified hazards and of the levels of severity of the possible harm of the considered hazards (see as well EN 1050). • risk evaluation and reductionComparison and decision, whether the risk is acceptable or not ATEX

  28. risks EN 1127-1 • probability and volume of explosive media • degree of dispersion and concentration • ignition sources • hot surfaces, flames • mechanically generated sparks • electric units, motors, switches • electrostatic and electrochemical effects • lightning • electromagnetic waves, radiation, • shocks waves, exothermal reactions ATEX

  29. conformity assessment group ll cat.1 cat.2 cat.3 Certification from QS according to ATEX EC type examination technical documentation to Notified Body controlled production , quality system documentation ATEX

  30. quality system • compliance with given standards • qualification of staff • defined responsibility • clear workflow • complete documentation • identification ATEX

  31. identification label conditions for use identification • category 1G into the fan and 2G out • G= for gas • surface max 135°C (T4) • motor for frequency control EEx de ATEX

  32. 00801G / 2G – IIA – T4 means 0080 : number of the ‚Notified Body‘ who checked the quality system (Ineris for us) 1G : inside category 1 for gas / 2G : outside category 2 for gas IIA : explosion group of the transported gases T4 : maximal temperature of surfaces ATEX

  33. explosion tests (type examination) according to EN 12874 1-inlet 2-outlet 3-throttlel 4-ignition on several points 5-flame arrester at inlet 6-flame arrester at outlet 7-flame sensor 8-pressure sensor ATEX

  34. product range ER ATEX

  35. ATEX links • directive 94/9/EG (ATEX 100a) http://europa.eu.int/comm/enterprise/atex/direct/newapproach.htm • directive 1999/92/EG (ATEX 137)http://europa.eu.int/comm/enterprise/atex/dir92-en.pdf • guidelinehttp://europa.eu.int/comm/enterprise/atex/guide/index.htm • standardsEN 1127-1 : explosive atmosphere http://www.pellmont.ch/sikeda/deutsch/cen114/en1127-1.htm ATEX

  36. thank you for your attention FläktComp Sweden AB Slöjdgatan 3 352 46 Växjö Sweden Tel +46 470 485 50 Fax +46 470 485 60 info@flaktcomp.se www.flaktcomp.se ATEX

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