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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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experience since 1985
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

1985 biogas
1985 biogas

Hofstetter (CH)

  • transport of biogas (methane)
  • up to 2000 Nm³/h with 180 mbar
  • 6 or 10 bar explosion resistance

ATEX

1992 solvent vapour
1992 solvent vapour

Hoffmann La Roche (Basle,CH)

  • solvent vapour
  • 200 m³/h
  • model ER10
  • LRV- installation with 30 fan units

ATEX

1993 to 1996 explosion tests and certificate ptb physikalisch technische bundesanstalt braunschweig
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

project atex 94 9 eg
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

sanofi 1999
sanofi 1999

Sanofi Synthélabo (F)

  • transport of solvent vapours
  • 1500 Nm³/h
  • system ER10
  • up to today 20 units installed at this customer

ATEX

atex 100 atex 137
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

directive for manufacturers atex 100
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

group and category
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

category 1g for zone 0
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

category 2g for zone 1
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

category 3g for zone 2
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

slide14
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

standard fan without specific risks
standard fan without specific risks

designed without specific measurements

standard design

ATEX

category 2 or 3 g and or d

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

category 2 or 3 gastight g and or d

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

category 2 g and or d

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

category 1g

design ER

non-sparking design

flame arresters

seal

category 1G

ATEX

category 1
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

requirements for cat 1g
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

requirements for cat 1g22
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

flame arresters
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

size and sensors
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

operating conditions
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

risk analysis
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

risks en 1127 1
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

conformity assessment
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

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

ATEX

identification label
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

slide32
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

explosion tests type examination according to en 12874
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

atex links
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

slide36

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