10.4 Ventilation and dedusting
It is very important to catch efficiently the dust generated during the
abrasive blasting process and to separate it at an efficient filter plant.
Vibration facilities or pneumatic dedusting processes are applied to clean
the filters. All air pipes are built in a stable manner, and they are protected
by labyrinths or baffle plates. In winter, it is possible to feed the cleaned
air again into the blasting hall to save heating costs.
10.5 Laying out
Walls and ceilings are laid out with highly abrasion-proof and special silencing
rubber plates.
10.6 Lighting
Special lamps should be dust-resistant and resistant to abrasives. They
should be designed especially for the use in blasting halls.
10.7 Transport systems
To equip the blasting halls transport systems are necessary such as rail
transport vehicles, roller tables, telpher lines or platforms for lifting
people.
10.8 Blasting technology
Pressure blasting pots in the standard form or as a double-chamber are used – ready
to use – including hoses, nozzles, protective equipment and emergency
shut-down devices according to BGV D 26.
10.9 Cleaning with compressed air
Complete compressed-air units with compressor, refrigeration dryer, compressed-air
storage device and oil-water separating system.
10.10 Safety devices
Installation and commissioning of a stationary blasting hall are subject
to numerous provisions, laws and ordinances.
In this regard, safety equipment should be considered according to purpose,
size, place of installation, etc. of the blasting hall.
In the following you can find some of the safety regulations:
- biased switch-off with electro-pneumatic remote control and emergency
shut-down,
- door switch and door limit switch finishing immediately the abrasive blasting
process upon opening,
- observation windows must exist,
- abrasive blasting process can only be performed at filter plants put into
operation (locking),
- sufficient vacuum must be in the blasting cab,
- an air exchange of 40 to 60 times per hour of the space volume of the blasting
hall must be guaranteed by the size of the blasting hall,
- after finishing the abrasive blasting work an air exchange (5 times) must
take place before entering the blasting hall, i.e.
waiting time of 8 minutes at an air exchange of 40 times
waiting time of 5 minutes at an air exchange of 60 times
The offset-time of the filter plants has to be scheduled accordingly.
- sufficient lighting,
- emergency lighting, in case of need,
- possible marking of the blasting process, e.g. by signal lights above the
entrance doors on the outside,
- guaranteeing the filter plant operation also during cleaning work,
- emergency stop button according to demand and requirements.
In addition, reference is made to chapter 12, laws and provisions.
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