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3.8 Fire and explosion hazard
A residual risk of injury remains on systems used for the extraction of combustible or
explosive substances despite fire and explosion protective measures. The
manufacturer cannot provide a 100% safety guarantee and does not assume liability
in case of damage.
An explosion risk exists if, among other circumstances,
– combustible dust is of small particle size (<approx. 0.5mm). (Caution!
Even fine light alloy dusts can be combustible and thus explosive!), or
– solvents are being extracted, or
– other explosive gases are being extracted
this list is not exclusive!
3.8.1 Explosion protection document
Where ATEX is applicable:
If an explosion hazard exists, the system operator is obliged, according to EU
directive 99/92/EC (ATEX 153), to draw up an explosion protection document
before commissioning the inlet isolation device. This document should include
the following:
– Specification of the system, the process, etc.
– Zone classification
– Data on relevant combustible dust explosion characteristics
– Protective measures
– Operator instructions
– Etc.
Other areas:
In addition to any internal documentation your organization may require,
please check with your local authorities having jurisdiction (AHJ)
for regulations and standards that may be applicable in your area such as
OSHA, NFPA, local building codes and electrical codes, for documenting
requirements prior to commissioning.
Explosive hazard areas shall be labeled with the “EX” warning
sign.
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