SIST EN 12779:2005+A1:2009
(Main)Safety of woodworking machines - Chip and dust extraction systems with fixed installation - Safety related performances and safety requirements
Safety of woodworking machines - Chip and dust extraction systems with fixed installation - Safety related performances and safety requirements
This document sets out the safety related performance requirements and specifies the methods for elimination of hazards or the measures that shall be taken to minimise hazards, which cannot be eliminated, on chip and dust extraction systems with fixed installation as defined in 3.1.1 and 3.1.2, for the purpose of this standard, hereinafter referred to as extraction system, connected to woodworking machines, designed to process solid wood, chipboard, fibreboard, plywood and also these materials where these are covered with plastic laminate or edgings. The extraction and conveying system operates pneumatically by vacuum and/or pressure between +- 0,3 bar.
This standard does not:
a) apply to fixed installations with an air flow capacity below 6 000 m3h-1 installed indoors;
b) apply to moveable units with an air flow capacity below 6 000 m3h-1;
c) apply to extraction equipment (e.g. extraction hoods, ducts) within a woodworking machine i.e. up to and including the outlet to which the extraction system is coupled;
d) apply to extraction systems connected to machines processing non-wood materials, such as plastic, plastic laminates, metals, glass or stone;
e) deal with the hazards from contact with or inhalation of dusts from wood coated with lacquer, plastic, aluminium and material with high additive contents or similar;
f) deal with shop fresh air supply;
g) apply to chip and dust extraction systems designed for Kst values above 200 bar ms-1;
h) apply to the silo discharge system;
i) cover the hazards related to Electromagnetic Compatibility (EMC) as required by the EMC Directive 89/336/EEC dated 3-5-89.
This document deals with the interaction with the silo discharge system if any.
This document covers the hazards relevant to these machines as stated in Clause 4 document
Directive 94/9/EC concerning equipment and protective systems intended for use in potentially explosive atmospheres can be applicable to the type of machine or equipment covered by this d
Sicherheit von Holzbearbeitungsmaschinen - Ortsfeste Absauganlagen für Holzstaub und Späne - Sicherheitstechnische Anforderungen und Leistungen
Dieses Dokument legt die sicherheitstechnischen Anforderungen fest und beschreibt die Verfahren zur
Beseitigung von Gefährdungen oder die zur Minimierung von nicht völlig zu beseitigenden Gefährdungen zu
ergreifenden Maßnahmen, die an ortsfest installierten Absauganlagen für Holzstaub und -späne nach den
Definitionen 3.1.1 und 3.1.2 — im Folgenden als „Absauganlagen“ bezeichnet — und im Zusammenhang mit
angeschlossenen Holzbearbeitungsmaschinen zur Bearbeitung von Massivholz, Spanplatten, Faserplatten,
Sperrholz sowie von diesen Werkstoffen, wenn sie kunststoffbeschichtet oder mit Kunststoffkanten versehen
sind, bestehen. Das Absaug- und Fördersystem wird pneumatisch betrieben unter Vakuum und/oder Druck
zwischen ± 0,3 bar.
Diese Norm:
a) gilt nicht für ortsfest in einem Arbeitsraum installierte Anlagen mit einem Luftvolumendurchsatz unter
6 000 m3h−1;
b) gilt nicht ortsveränderliche Anlagen mit einem Luftvolumendurchsatz unter 6 000 m3h−1;
c) gilt nicht für Absaugbauteile innerhalb einer Holzbearbeitungsmaschine, z. B. Absaughauben, Leitungen
usw., d. h. alles einschließlich des Absaugstutzens, an den die Absauganlage angeschlossen wird;
d) gilt nicht für Absauganlagen in Verbindung mit Maschinen zur Bearbeitung von anderen Materialien als
Holz, wie z. B. Kunststoffe, Kunststofflaminate, Metalle, Glas oder Stein;
e) behandelt nicht die Gefährdungen, die durch einen Kontakt oder das Einatmen von Staub von mit Lack
behandeltem Holz, von Kunststoffen, Aluminium und Materialien mit hohem Anteil an Zusätzen oder
ähnlichen Stoffen ausgehen;
f) behandelt nicht die Luftzuführung zu Arbeitsräumen;
g) gilt nicht für Absauganlagen für Holzstaub und Holzspäne, die für Werte von Kst über 200 bar ms−1
konstruiert sind;
h) gilt nicht für das Silo-Austragsystem;
i) behandelt nicht die Gefährdungen bezüglich der Elektromagnetischen Verträglichkeit (EMV), wie in der
Sécurité des machines pour le travail du bois - Installations fixes d'extraction de copeaux et de poussières - Performances relatives à la sécurité et prescriptions de sécurité
Le présent document spécifie les prescriptions de performance en matière de sécurité ainsi que les méthodes permettant d'éliminer les phénomènes dangereux ou les mesures destinées à limiter les risques qu'il est impossible de supprimer, pour les installations fixes d'extraction de copeaux et de poussières telles que définies en 3.1.1 et 3.1.2, pour les besoins de la présente norme, ci-après appelées installations d'extraction, raccordées aux machines à bois conçues pour l'usinage de bois massif, de panneaux de particules et de fibres, de contreplaqué, ainsi que ces matériaux lorsque leurs surfaces ou leurs chants sont recouverts de matière plastique stratifiée. L'installation d'extraction et de transport fonctionne pneumatiquement en dépression et/ou en pression dans une plage de 0,3 bar.
La présente norme :
a) ne s’applique pas aux installations fixes ayant une capacité de débit d’air inférieure à 6 000 m3h-1 installées à l’intérieur des locaux ;
b) ne s’applique pas aux unités mobiles ayant une capacité de débit d’air inférieure à 6 000 m3h-1 ;
c) ne s’applique pas aux dispositifs d'extraction (par exemple dispositifs de captage, gaines) situés dans la machine à bois, c'est-à-dire avant et au niveau de la sortie à laquelle est raccordée l'installation d'extraction ;
d) ne s’applique pas aux installations d’extraction raccordées à des machines d’usinage de matériaux autres que le bois, tels que matière plastique, matière plastique stratifiée, métaux, verre ou pierre ;
e) ne traite pas des phénomènes dangereux résultant du contact ou de l’inhalation de poussières de bois recouvert de laque, de matière plastique, d’aluminium et de matériau à forte teneur en additif ou similaire ;
f) ne traite pas de l’introduction d’air neuf dans l’atelier ;
g) ne s’applique pas aux installations d’extraction de copeaux et de poussières conçues pour des indices de Kst supérieurs à 200 bar ms-1 ;
h) ne s’applique pas au dispositif de déchargement du silo ;
(....)
Varnost lesnoobdelovalnih strojev - Nepremični sistemi za odstranjevanje odpadnega lesa (trske, drobci itd.) - Varnostne lastnosti in varnostne zahteve
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.MHYDQMHSicherheit von Holzbearbeitungsmaschinen - Ortsfeste Absauganlagen für Holzstaub und Späne - Sicherheitstechnische Anforderungen und LeistungenSécurité des machines pour le travail du bois - Installations fixes d'extraction de copeaux et de poussières - Performances relatives à la sécurité et prescriptions de sécuritéSafety of woodworking machines - Chip and dust extraction systems with fixed installation - Safety related performances and safety requirements79.120.10Lesnoobdelovalni strojiWoodworking machinesICS:Ta slovenski standard je istoveten z:EN 12779:2004+A1:2009SIST EN 12779:2005+A1:2009en01-oktober-2009SIST EN 12779:2005+A1:2009SLOVENSKI
STANDARD
SIST EN 12779:2005+A1:2009
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12779:2004+A1
August 2009 ICS 79.120.10 Supersedes EN 12779:2004English Version
Safety of woodworking machines - Chip and dust extraction systems with fixed installation - Safety related performances and safety requirements
Sécurité des machines pour le travail du bois - Installations fixes d'extraction de copeaux et de poussières - Performances relatives à la sécurité et prescriptions de sécurité
Sicherheit von Holzbearbeitungsmaschinen - Ortsfeste Absauganlagen für Holzstaub und Späne - Sicherheitstechnische Anforderungen und Leistungen This European Standard was approved by CEN on 20 October 2004 and includes Amendment 1 approved by CEN on 16 July 2009.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12779:2004+A1:2009: ESIST EN 12779:2005+A1:2009
EN 12779:2004+A1:2009 (E) 2 Contents page Foreword .4Introduction .51Scope .62Normative references .73Terms, definitions, terminology and symbols .93.1Terms and definitions .93.2Terminology . 123.3Symbols and units . 124List of significant hazards . 125Safety requirements and/or measures . 145.1General . 145.2Controls . 155.2.1General . 155.2.2Safety and reliability of control systems . 155.2.3Position of and other requirements to controls . 165.2.4Mode selection . 185.2.5Speed changing . 185.2.6Failure of the power supply . 185.2.7Failure of control circuits . 195.3Protection against mechanical hazards . 195.3.1Stability of supports . 195.3.2Risk of break up during operation . 195.3.3Tool holder and tool design . 195.3.4Braking systems . 195.3.5Ejection . 195.3.6Work-piece support and guides . 195.3.7Prevention of access to moving parts . 205.3.8Automation and mechanisation . 205.3.9Clamping devices . 205.3.10Multi-station machines . 205.3.11Safety appliances. 205.4Protection against non-mechanical hazards . 205.4.1Fire and explosion . 205.4.2Noise . 345.4.3Emission of chips, dust and gases . 375.5Electricity . 425.6Ergonomics and handling . 425.6.1Electrical controls . 425.6.2Mechanical controls . 435.7Lighting . 435.8Pneumatics . 435.9Hydraulics . 435.10Vibration . 445.11Laser . 445.12Static electricity . 445.13Errors of fitting . 445.14Isolation . 44SIST EN 12779:2005+A1:2009
EN 12779:2004+A1:2009 (E) 3 5.15Maintenance . 456Information for use . 456.1General . 456.2Warning . 456.2.1Warning devices . 456.2.2Warning signs . 456.3Marking . 466.4Instruction handbook . 466.4.1General . 466.4.2Performance . 466.4.3Explosion protection and safety systems . 476.4.4Information for use . 476.4.5Maintenance practice . 486.4.6Noise declaration . 49Annex A (informative)
Table with corresponding terms in English, French and German . 51Annex B (informative)
Relationship between airflow, vacuum, air velocity and power consumption . 55Annex C (informative)
Verification of performance measurement . 58Annex D (normative)
Noise reduction at the design stage . 60Annex E (informative)
Air velocity and extraction hood design . 62Annex ZA (informative)
!Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC" . 64Annex ZB (informative)
!Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC" . 65Bibliography . 66 SIST EN 12779:2005+A1:2009
EN 12779:2004+A1:2009 (E) 4 Foreword This document (EN 12779:2004+A1:2009) has been prepared by Technical Committee CEN/TC 142 “Woodworking machines - Safety”, the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2010 and conflicting national standards shall be withdrawn at the latest by February 2010. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document includes Amendment 1, approved by CEN on 2009-07-16. This document supersedes EN 12779:2004. The start and finish of text introduced or altered by amendment is indicated in the text by tags ! ". This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of !Machinery Directives". !For relationship with EU Directive(s), see informative Annexes ZA and ZB, which are integral parts of this document." The European Standards produced by CEN/TC 142 are particular to woodworking machines and compliment the relevant “A” and “B” standards on the subject of general safety (see introduction of
EN ISO 12100-1:2003 for a description of A, B and C standards). This standard for Chip and dust extraction systems with fixed installation will be followed by a separate standard for Semi-stationary chip and dust extraction machines. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
SIST EN 12779:2005+A1:2009
EN 12779:2004+A1:2009 (E) 5 Introduction This standard has been prepared to be a harmonized standard to provide one means of conforming to the Essential Health and Safety Requirements of the Machinery Directive and associated EFTA Regulations. This document is a type “C” standard as defined in EN ISO 12100-1:2003. The machinery concerned and the extent to which hazards, hazardous situations and events covered are indicated in the scope of this document. When provisions of this type C standard are different from those, which are stated in type A or B standards, the provisions of this type C standard take precedence over the provisions of other standards, for machines that have been designed and built in accordance with the provisions of this type C standard. The requirements of this document are directed to manufacturers and their authorised representatives of chip and dust extraction systems. It is also useful for designers. This document also includes information, which can be provided by the manufacturer to the user. SIST EN 12779:2005+A1:2009
EN 12779:2004+A1:2009 (E) 6 1 Scope This document sets out the safety related performance requirements and specifies the methods for elimination of hazards or the measures that shall be taken to minimise hazards, which cannot be eliminated, on chip and dust extraction systems with fixed installation as defined in 3.1.1 and 3.1.2, for the purpose of this standard, hereinafter referred to as extraction system, connected to woodworking machines, designed to process solid wood, chipboard, fibreboard, plywood and also these materials where these are covered with plastic laminate or edgings. The extraction and conveying system operates pneumatically by vacuum and/or pressure between ± 0,3 bar. This standard does not: a) apply to fixed installations with an air flow capacity below 6 000 m3h-1 installed indoors; b) apply to moveable units with an air flow capacity below 6 000 m3h-1; c) apply to extraction equipment (e.g. extraction hoods, ducts) within a woodworking machine i.e. up to and including the outlet to which the extraction system is coupled; d) apply to extraction systems connected to machines processing non-wood materials, such as plastic, plastic laminates, metals, glass or stone; e) deal with the hazards from contact with or inhalation of dusts from wood coated with lacquer, plastic, aluminium and material with high additive contents or similar; f) deal with shop fresh air supply; g) apply to chip and dust extraction systems designed for Kst values above 200 bar ms-1; h) apply to the silo discharge system; i) cover the hazards related to Electromagnetic Compatibility (EMC) as required by the EMC Directive 89/336/EEC dated 3-5-89. This document deals with the interaction with the silo discharge system if any. This document covers the hazards relevant to these machines as stated in Clause 4 document
Directive 94/9/EC concerning equipment and protective systems intended for use in potentially explosive atmospheres can be applicable to the type of machine or equipment covered by this document. The present standard is not intended to provide means of complying with the Essential Health and Safety Requirements (EHSR) of Directive 94/9/EC. !This European Standard is not applicable to machines which are manufactured before the date of its publication as EN." SIST EN 12779:2005+A1:2009
EN 12779:2004+A1:2009 (E) 7 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. !deleted text" !EN 614-1:2006, Safety of machinery — Ergonomic design principles — Part 1: Terminology and general principles EN 894-1:1997, Safety of machinery — Ergonomics requirements for the design of displays and control actuators — Part 1: General principles for human interactions with displays and control actuators EN 894-2:1997, Safety of machinery — Ergonomics requirements for the design of displays and control actuators — Part 2: Displays EN 894-3:2000, Safety of machinery — Ergonomics requirements for the design of displays and control actuators — Part 3: Control actuators" EN 953:1997, Safety of machinery — Guards — General requirements for the design and construction of fixed and movable guards !deleted text" EN 982:1996, Safety of machinery — Safety requirements for fluid power systems and their components —Hydraulics EN 983:1996, Safety of machinery — Safety requirements for fluid power systems and their components — Pneumatics !EN 1005-1:2001, Safety of machinery — Human physical performance — Part 1: Terms and definitions EN 1005-2:2003, Safety of machinery — Human physical performance — Part 2: Manual handling of machinery and component parts of machinery EN 1005-3:2002, Safety of machinery — Human physical performance — Part 3: Recommended force limits for machinery operation EN 1005-4:2005, Safety of machinery — Human physical performance — Part 4: Evaluation of working postures and movements in relation to machinery EN 1037:1995, Safety of machinery — Prevention of unexpected start-up" !EN 1127-1:2007", Explosive atmospheres — Explosion prevention and protection — Part 1: Basic concepts and methodology EN 1366-1:1999, Fire resistance tests on service installations — Part 1: Ducts EN 1366-2:1999, Fire resistance tests for service installations — Part 2: Fire dampers EN 13284-1:2001, Stationary source emissions — Determination of low range mass concentration of dust — Part 1: Manual gravimetric method !EN 50370-1:2005, Electromagnetic compatibility (EMC) — Product family standard for machine-tools —
Part 1: Emission SIST EN 12779:2005+A1:2009
EN 12779:2004+A1:2009 (E) 8 EN 50370-2:2003, Electromagnetic compatibility (EMC) — Product family standard for machine-tools —
Part 2: Immunity" !EN 60204-1:2006", Safety of machinery — Electrical equipment of machines — Part 1: General requirements !(IEC 60204-1:2005, modified)" !EN 60439-1:2008, Low-voltage switchgear and controlgear assemblies — Part 1: Type-tested and partially type-tested assemblies (IEC 60439-1:2007)" EN 60529:1991, Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989) EN 60947-4-1:2001, Low-voltage switchgear and controlgear — Part 4-1: Contactors and motor-starters — Electromechanical contactors and motor-starters (IEC 60947-4-1:2000) EN 60947-5-1:2004, Low-voltage switchgear and controlgear — Part 5-1: Control circuit devices and switching elements — Electromechanical control circuit devices (IEC 60947-5-1:2003) !EN 61310-1:2008, Safety of machinery — Indication, marking and actuation — Part 1: Requirements for visual, auditory and tactile signals (IEC 61310-1:2007)" EN ISO 11202:1995, Acoustics — Noise emitted by machinery and equipment — Measurement of emission sound pressure levels at a work station and at other specified positions — Survey method in situ
(ISO 11202:1995) EN ISO 11688-1:1998, Acoustics — Recommended practice for the design of low-noise machinery and equipment — Part 1: Planning (ISO/TR 11688-1:1995) EN ISO 12100-1:2003, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic terminology and methodology (ISO 12100-1:2003) EN ISO 12100-2:2003, Safety of machinery — Basic concepts, general principles for design — Part 2: Technical principles !deleted text" (ISO 12100-2:2003) !EN ISO 13849-1:2008, Safety of machinery — Safety-related parts of control systems — Part 1: General principles for design (ISO 13849-1:2006)" !EN ISO 13850:2008, Safety of machinery — Emergency stop — Principles for design
(ISO 13850:2006)" !EN ISO 13857:2008, Safety of machinery — Safety distances to prevent hazard zones being reached by upper and lower limbs (ISO 13857:2008)" EN ISO 14122-2:2001, Safety of machinery — !Permanent means of access" to machinery — Part 2: Working platforms and !walkways" (ISO 14122-2:2001) EN ISO 14122-3:2001, Safety of machinery — Permanent means of access to machinery — Part 3: Stairs, stepladders and guard rails (ISO 14122-3:2001) EN ISO 14122-4:2004, Safety of machinery — Permanent means of access to machinery — Part 4: Fixed ladders (ISO 14122-4:2004) ISO 7000:2004, Graphical symbols for use on equipment — Index and synopsis ISO 10816-1:1995, Mechanical vibration — Evaluation of machine vibration by measurements on non-rotating parts — Part 1: General guidelines HD 22.1 S4:2002, Cables of rated voltages up to and including 450/750 V and having cross-linked insulation — Part 1: General requirements SIST EN 12779:2005+A1:2009
EN 12779:2004+A1:2009 (E) 9 3 Terms, definitions, terminology and symbols 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in EN ISO 12100-1:2003 and the following apply. 3.1.1 chip and dust extraction system wood waste handling system including ducting, fans, filters, cyclones and storage facilities, including silo except its discharge system. The system is intended for conveyance, separation and storage of chips and dust from woodworking machines. A typical example of an extraction system with fixed installation is illustrated as the shaded part of Figure 1
Figure 1 — Chip and dust extraction system SIST EN 12779:2005+A1:2009
EN 12779:2004+A1:2009 (E) 10 3.1.2 fixed installation extraction system which is permanently located and installed, or a moveable extraction system with air flow capacity greater than 6 000 m3h-1 3.1.3 chips particles of wood emanating from processing at woodworking machines. The particle size for chips is set to equal or greater than 0,5 mm 3.1.4 dust particles of wood emanating from processing at woodworking machines. The particle size for dust is set to less than 0,5 mm 3.1.5 ducting pipe-work, connecting woodworking machines to the fans and separators 3.1.6 main duct duct to which branch ducts from a group of machines are connected 3.1.7 fan component which produces the airflow for conveying chips and dust within the system 3.1.8 separator device for separation of chips and dust from the conveying air NOTE Filters and cyclones are examples of separators. 3.1.9 silo fixed installed equipment for storage of chips and dust 3.1.10 bin movable equipment with a volume up to 0,5 m3
for storage of chips and dust 3.1.11 container movable equipment with a volume over 0,5 m3 for storage of chips and dust 3.1.12 silo discharge system system which continually or intermittently empties chips and dust from silo/container 3.1.13 emptying system system which continually or intermittently removes chips and dust from the separator 3.1.14 transport system system to convey chips and dust from one or more separator or silo to other parts of the extraction system SIST EN 12779:2005+A1:2009
EN 12779:2004+A1:2009 (E) 11 3.1.15 extraction vacuum static vacuum in a duct connecting point of a pneumatic extraction system 3.1.16 air velocity average velocity of the air inside a duct, calculated over the whole cross section and which allows the determination of the air flow rate (see Figure 2) 3.1.17 capture velocity minimum air velocity that will draw the chips and dust towards the extraction hood (see Figure 2) 12 Key 1 Air velocity 2 Capture velocity Figure 2 — Air velocities 3.1.18 concurrency factor ratio in percent between the actual planned maximum air flow and the total air flow demand of all machines connected to the extraction system 3.1.19 Kst value explosive characteristic of combustible dust in air NOTE Kst values are detailed in EN 26184-1. 3.1.20 dust loaded part dust loaded interior of the extraction system including ducting, silo, container, bin, separator etc. from the duct inlet connected to the wood working machine to the filter medium surface, where the air filtration is performed 3.1.21 clean air part interior of the extraction system from the filter medium surface, where the air filtration is performed, to the air outlet 3.1.22 return air filtered air reintroduced into the working area SIST EN 12779:2005+A1:2009
EN 12779:2004+A1:2009 (E) 12 3.1.23 servicing level level on which persons stand when operating or maintaining the equipment 3.2 Terminology List of corresponding terms in English, French and German is included in Annex A. 3.3 Symbols and units Following symbols and units are used in this document: Parameter SymbolUnit Diameter D mm Length L m Area S m2 Volume V m3 Air velocity v ms-1 Air flow Qa m3h-1 Pressure p Pa Pressure differential ∆p Pa Temperature t0C Power P kW Material flow Qm kgh-1Kst
value Kst bar ms-1 Fan efficiency η % 4 List of significant hazards !This clause contains all significant hazards, hazardous situations and events (see EN 1050:1996) as far as they are dealt with in this document, identified by risk assessment as significant for the machines as defined in the scope and which require action to eliminate or reduce the risk. This document deals with these significant hazards by defining safety requirements and/or measures or by reference to relevant standards. These hazards are listed in Table 1 in accordance with Annex A of EN 1050:1996. SIST EN 12779:2005+A1:2009
EN 12779:2004+A1:2009 (E) 13 Table 1 — List of significant hazards
No Hazards, hazardous situations and hazardous events EN ISO 12100 Relevant sub-clause of this document
Part 1: 2003 Part 2: 2003
1 Mechanical hazards related to: - machine parts or workpieces:
a) shape; 4.2 4.2.1, 4.2.2, 5 5.4.1.4, 5.4.1.7
b) relative location; 5.2.3, 5.4.1.2, 5.4.1.4, 5.4.1.5, 5.4.1.6, 5.4.1.7
c) mass and stability (potential energy of elements which may move under the effect of gravity) 5.4.1.7
d) mass and velocity (kinetic energy of elements in controlled or uncontrolled motion); 5.10
e) mechanical strength. 5.3.1, 5.4.1.1, 5.10
- accumulation of energy inside the machinery:
g) liquids and gases under pressure; 4.2 4.10, 5.5.4 5.4.1 h)vacuum 4.2 4.10, 5.5.4 5.4.1 1.1 Crushing hazard 4.2.1
5.4.1.7; 5.3.7 1.2 Shearing hazard 5.4.1.7; 5.3.7 1.3 Cutting or severing hazard 5.4.1.7; 5.3.7 1.4 Entanglement hazard 5.4.1.7; 5.3.7 1.5 Drawing-in or trapping hazard 5.3.7, 5.4.1.7 1.9 High pressure fluid injection or ejection hazard 5.4.3 2 Electrical hazards due to: 2.1 Contact of persons with live parts (direct contact) 4.3 4.9, 5.5.4 5
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