Container Cleaning System TANKO®EX-R64T
3 Design and Function
Translation - Operating/installation instructions 2020/03
31/80
3.4
Cleaning Media
Due to the wide range of practical applications and use cases for the cleaning device, it is NOT possible
for AWH to recommend specific cleaning media 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 “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”
Excerpt from TRGS 727 “Avoidance 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 measuring, sampling and cleaning, the fluids themselves or the interior of the container could be
charged in a dangerous manner. 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.
