Special Considerations - Reactive Metals; Electrical Equipment; Fire Suppression; Good Housekeeping - 3D Systems DMP Flex 350 User Manual

2.4 Special Considerations - Reactive Metals
The following are considered to be reactive metals:
• Titanium and Titanium alloys
• Aluminum and Aluminum alloys
2.4.1 Electrical Equipment
Avoid using standard electrical equipment inside the identified zone. Only use equipment that meets the explosion safety
requirements.
2.4.2 Fire Suppression
The facility must have a Class D fire extinguisher or dry sand, or salt and a fire blanket present in the work area.
The automatic sprinkler system must be disabled in areas where reactive metals are used or stored. Several of the materials,
(magnesium, titanium, aluminum, etc.) will react with water to produce hydrogen. With the sprinkler system disabled, local
building code may require the installation of an inert gas system for fire suppression (argon is recommended, halon is
prohibited).
Note: Although a class D is required for metal fires, also consider having a class ABC portable on hand as well
for non-metal fires that a class D is not effective against.
Caution: Personnel must be trained on fire prevention and suppression.
2.4.3 Good Housekeeping
Make sure that dust layers, clouds or dangerous concentrations of dust are avoided by good housekeeping.
Examples of good housekeeping include, but are not limited to:
• Using a wet separator, explosion-proof vacuum cleaner after each use. The RPM must be throughly cleaned before
moving to the next module, to avoid potential dust clouds.
• Using a floor cleaning machine at the end of each shift, to avoid dust layers around the modules and on the
production floor.
• Using a dust extraction system to remove airborne dust out of the air any time metal powder is handled.
• Using pure ethanol to wipe down the modules after each use and before transporting the RPM.
3D Systems, Inc. 15 p/n: 15-D100, rev. D