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BS EN 12779:2015 – TC:2020 Edition

$258.95

Tracked Changes. Safety of woodworking machines. Chip and dust extraction systems with fixed installation. Safety requirements

Published By Publication Date Number of Pages
BSI 2020 180
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This European Standard deals with the significant hazards, hazardous situations and events relevant for chip and dust extraction systems for fixed installation and for connection with machines for working on solid wood (including hard wood) and wood-based materials, when they are used as intended and under the conditions foreseen by the manufacturer, including reasonably foreseeable misuse. This European Standard deals also with the technical requirements to minimize the hazards in connection with the temporary storage of wood dust and chips in a silo, bin or container including charging and discharge systems. This European standard does not apply to: a) chip and dust extraction systems with filters installed indoors (covered by prEN 16770); b) extraction equipment (e.g. extraction hoods, ducts) within a woodworking machine including the outlet to which the extraction system is connected; c) chip and dust extraction systems designed for KST values above 200 bar ms?1; d) mechanical conveying systems between filter and storage facility; e) extraction systems and conveying systems with underpressure below 0,3 bar or overpressure above 0,3 bar; f) storage devices for pressed wood products (e.g. pellets) and humid shavings. Requirements for containers are not dealt with in this standard. This European Standard is not applicable to machines which are manufactured before the date of its publication as EN.

PDF Catalog

PDF Pages PDF Title
122 Contents Page
127 1 Scope
2 Normative references
129 3 Terms, definitions, terminology, symbols and units
3.1 Terms and definitions
132 3.2 Terminology
3.3 Symbols and units
4 List of significant hazards
134 5 Safety requirements and/or measures
5.1 General
5.2 Control systems
5.2.1 Safety and reliability of control systems
5.2.2 Emergency stop
135 5.2.3 Failure of the power supply
5.3 Protection against mechanical hazards
5.3.1 Stability of structural parts
5.3.2 Shearing, crushing, drawing-in
136 5.3.3 Access to machinery
5.3.4 Pneumatics
5.4 Protection against fire and explosion
5.4.1 Hazards of fire and explosion
5.4.1.1 General
137 5.4.1.2 Parameters for fire and explosion
5.4.1.3 Avoidance of chip and dust accumulation in ducting
138 5.4.2 Fire protection and prevention
5.4.2.1 General
5.4.2.2 Measures against fire spreading
5.4.2.3 Measures against fire damage
139 5.4.3 Explosion
5.4.3.1 Ignition sources
140 5.4.3.2 Prevention of hazards due to ignition sources
142 5.4.3.3 Constructive measures against impact of explosions
145 5.5 Protection against noise
5.6 Protection against hazardous substances
5.6.1 Dust emissions
146 5.6.2 Performance requirements
147 5.6.3 Performance indication
5.6.4 Reintroduction of dust
5.6.4.1 Recirculation air
5.6.4.2 Monitoring devices
148 5.7 Protection against electrical hazards
5.8 Additional requirements for silos
5.8.1 Requirements for design and construction
149 5.8.2 Discharge system
5.8.3 Openings for silos
151 6 Information for use
6.1 General
6.2 Marking
152 6.3 Instruction handbook
6.3.1 General
153 6.3.2 Information related to installation
6.3.3 Information related to operation
154 6.3.4 Information related to maintenance
6.3.5 Information related to silos
155 6.3.6 Fire fighting
6.3.7 Noise declaration
157 Annex A (informative)Examples of extraction systems
A.1 Explanation to figures
163 A.2 Interface to woodworking machinery
164 Annex B (informative)Table with corresponding terms in English, French and German
168 Annex C (informative)Classification of places where explosive atmospheres may occur (according to Directive 1999/92/EC)
170 Annex D (informative) Noise reduction at the design stage
D.1 Noise sources
D.2 Measures to reduce noise
171 D.3 Impact from chips and dust
172 Annex E (normative)Silos with a cross section up to 45 m2
174 Annex F (informative)Measurement of residual dust content
175 Annex ZA (informative)Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC
BS EN 12779:2015 - TC
$258.95