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GSI Group - Laser Division
JK300HP/JK300P/JK125P
Issue 2.0
Pre-installation and User Manual
Part No: 1EA300E01
Page
29 of 172
2.5.2 Fume
Fume and fine particulate can be generated during processing. Fume can include metallic
particles, dust, chemical and gaseous vapours. Such materials must always be regarded as
a potential health and safety hazard. Ensure measures are taken to prevent inhalation.
Always consult the following regulations/recommended practices:
•
Health and Safety Regulations.
•
Local and Plant Regulations.
•
Material Manufacturers` Safety Recommendations.
The following guidelines will reduce or eliminate fume hazards:
•
Containment of processing by-products in a safety enclosure.
•
Evacuation of the processing by-products and assist gases.
An exhaust appliance must be provided because, when assist gases are used in Laser
processing, the local oxygen concentration may significantly increase from the normal
value by 20% by volume. The exhaust appliance must be positioned as near as
possible to the point of origin to prevent processing fumes contaminating the air of the
workroom.
Care is needed in the choice of evacuation equipment to avoid re-circulation of fine
particulate around the building. Simple filtering systems are unlikely to remove harmful
vapours and gases.
Ensure that the venting of fume outside the building complies with Local Statutory
Requirements. Particular care is needed in the siting of the exit vent, to ensure
adequate atmospheric dilution has occurred prior to personnel exposure. The vent
must be located away from personnel access, preferably at roof level.
•
Use of Personal Protection Clothing (PPC).
•
Personal Protective clothing must be supplied and worn. However, this is a last resort
precaution and PPC should not be used as the primary safety precaution.
Guidance on welding fume and its removal can be obtained by contacting:
The Welding Institute,
Abington Hall, Abington,
Cambridge CB1 6AL, England.
General guidance can also be obtained from GSI Group - Laser Division.
Petitioners Canadian Solar Inc. and Canadian Solar (USA) Inc.
Ex. 1025, p. 29