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.
- Table of contents
- 1. Fields of application of abrasive blasting technology
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2. Blasting technology
- 2.1 Airless blast cleaning
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2.2 Injection blasting
- 2.2.1 Compressed air blasting (also air blast cleaning or sand blasting)
- 2.2.2 Pressure blasting (injector blasting)
- 2.2.3 Vacuum-compressed-air blasting and vacuum injection blasting
- 2.2.4 Damp blasting
- 2.2.5 Wet blasting
- 2.2.6 Slurry blasting
- 2.2.7 Ice Blasting
- 2.2.8 Water- jetting cleaning and hydro-jetting
- 2.2.9 Wet blasting for fine surface treatment
- 2.2.10 Combination of different blasting methods
- 2.3 Laser cleaning
- 3. Abrasive
- 4. Efficiency assessment of abrasive blasting
- 5. Influence of compressed-air blasting on the surface of the workpiece
- 6. Generation of compressed air
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7. Plants for compressed-air blasting
- 7.1 Small and medium-sized blasting pots
- 7.2 Large blasting pots
- 7.3 Double-chamber blasting pot
- 7.4 Mixing and dosing valve
- 7.5 Hoses, lengths of hoses, couplings
- 7.6 Selection of a blasting pot in considering the wear and tear behaviour
- 7.7 Increased wear and tear at the blasting pot caused by wrong adjustment
- 8. Remote control and emergency shut-downs
- 9. Jet nozzles
- 10. Stationary blasting halls
- 11. Mobile abrasive blasting equipment
- 12. Laws and provisions