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GSI Group - Laser Division
JK300HP/JK300P/JK125P
Pre-installation and User Manual
Issue 2.0
Page 28 of 172
Part No: 1EA300E01
2.5 Environmental
Hazards
Materials used in Laser processing applications can become hazardous if safe working
practices are not followed. Hazards can result from the following:
•
Fire.
•
Fume.
•
Compressed Gases.
•
Solvents.
2.5.1 Fire
Particular care is necessary when processing combustible materials.
The use of oxygen as an assist gas on combustible materials can exacerbate a fire hazard.
Combustible materials include plastics, waxes, and some metals. Compressed gases and
solvents used for equipment maintenance also increase the risk of Laser-initiated fires.
Do not attempt to process reactive metals such as titanium and magnesium using oxygen as
an assist gas. Such materials must be processed using inert gases only (e.g. nitrogen,
argon, etc). Always consult the material manufacturer safety information before commencing
processing.
To test for the potential reaction of a metal in the presence of oxygen, use the following
procedure:
•
Use a sample piece of the metal on which to test.
•
Ensure that the gas line is fitted with a flashback arrestor.
•
Ensure a colleague is present to turn off the Laser in event fire.
•
Ensure a second colleague is present with a suitable fire extinguisher.
•
Operate the Laser to safe test the metal.
Petitioners Canadian Solar Inc. and Canadian Solar (USA) Inc.
Ex. 1025, p. 28