SOMAS A11 - Safety; Safety Instructions; General Dangers; Hazards Due to Electrical Equipment

8
Edition: 2022-06 Original document - Mi-503 EN
2 Safety
2.1 Safety instructions
2.1.1 General dangers
Sources of danger resulting in general hazards:
•
Mechanical hazards
•
Electrical hazards
2.1.2 Hazards due to electrical equipment
Due to the permanent dampness, electrically-operated machine parts represent a
potential source of danger.
Comply with all regulations on electrical equipment in damp areas!
2.1.3 Additional hazards
2.1.3.1 Entanglement, crushing and cut/sever hazards
•
by moving actuator parts left exposed, by removing covers for inspection,
sampling, etc.
•
by automatic operated valves
2.1.3.2 Burning or scalding hazards
•
by opening or leaving open function-check and/or sampling openings on
systems operating at high temperatures (above 40°C)
•
by operating temperature >= 70°C. Short contacts (approx. 1s) of the skin with
the surface of the valve may cause burns (pr EN 563)
•
by operating temperature = 65°C. Longer contacts (approx. 3s) of the skin with
the surface of the valve may cause burns (pr EN 563)
•
by operating temperature 55°C…65°C. Longer contacts (approx. 10 ... 3s) of the
skin with the surface of the valve may cause burns (pr EN 563)
2.1.3.3 Explosion hazards
A high surface temperature on a valve and actuator, constitutes (a risk for burn
injuries, and) a risk of ignition of explosive atmospheres in ATEX applications.
The surface temperature of the equipment is not dependent on the equipment itself, but
on the ambient conditions and the process conditions. The protection from the surface
temperature is the responsibility of the end user, and must be effectuated before the
equipment is put into service.