ATEX Retractor System TANKO-RT/-RTS
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Translation - Operating/installation instructions 2020/01
3 Design and Function
3.4
Cleaning Media
Due to the wide variety of practical cases of application and use for the cleaning device, it is NOT
possible for AWH to recommend specific cleaning agents for the owner.
The owner bears the sole responsibility for the type of cleaning media, their use and handling.
For this reason, AWH can provide the owner with a few reference points and notes (for a device in
a container) but only as a precautionary measure, which must be observed and integrated into the
owner's hazard assessments.
NOTE ON EXPLOSION PROTECTION
Before using the device in an Ex area, the technical rules for avoiding the dangers of
potentially explosive atmospheres must be observed.
If this is not observed, the explosion protection could be disabled.
TRBS 2152/TRGS 720 “Hazardous, potentially explosive atmosphere - General -”
TRBS 2152 Part 1/TRGS 721 “Hazardous, potentially explosive atmosphere -
Assessment of the explosion hazard -”
TRBS 2152 Part 2/TRGS 722 “Hazardous, potentially explosive atmosphere -
Avoidance or restriction of hazardous potentially explosive atmosphere-
”
TRGS 727 “Avoidance of ignition hazards due to electrostatic charge”,
Chapter 4.12 “Cleaning containers”
IEC/TS 60079-32-1, Explosive atmospheres – Part 32-1: Electrostatic hazards,
guidance, Chapter “Spraying liquids and tank cleaning”
Excerpts from TRGS 727 “Prevention of ignition hazards due to electrostatic charge”
Chapter 4 Electrostatic charges when handling fluids
When filling and emptying containers with fluids, when recirculating, stirring, mixing and spraying fluids
and also when implementing measuring, sampling and cleaning work, the fluids themselves or the
interior of the container can be provided with a hazardous charge. The size and intensity of the resulting
charge depend on the properties of the fluid, its flow rate, the procedure, the size and geometry of the
container as well as its material.”
Section 4.12 Cleaning Containers
(1) When cleaning containers, particularly during blast cleaning, high electrostatic charges can occur.
(2) The resulting amount of charge is influenced by various factors, including:
–
the properties of the blasting material,
–
further additives to the blasting material,
–
the phase condition of the blasting material,
–
the phase condition of the contaminated blasting material,
–
the flow rate during fluid jet cleaning,
–
the shape and number of jet nozzles,
–
the operating pressure,
–
the size and geometry of the container,
–
the fluid properties in the container,
–
the residual fluid and
–
the fluid level.