MIL-HDBK-1110
Figure 2
Schematic Drawing of Cross Section of Typical Water-Injected
Wet Abrasive Blasting Nozzle
d) Centrifugal. Cleaning by centrifugal blasting is
achieved by using machines with motor-driven bladed wheels to
hurl abrasives at a high speed against the surface to be cleaned.
Advantages over conventional blasting include savings in time,
labor, energy, and abrasive; achieving a cleaner, more uniform
surface; and better environmental control. Disadvantages of
centrifugal blasting include the difficulty of using it in the
field, especially over uneven surfaces, although portable systems
have been developed for cleaning structures such as ship hulls
and storage tanks. Robots may be used to guide the equipment.
In many cases, the abrasive used is reclaimed and used again.
6.7.1.2
Conventional Abrasive Blasting Equipment. Components
of dry abrasive blasting equipment are air supply, air hose and
couplings, abrasive blast machines, abrasive blast hose and
couplings, nozzles, operator equipment, and oil and moisture
separators. A brief description of each component follows:
a) Air Supply. The continuous and constant supply of
an airstream of high pressure and volume is one of the most
critical parts of efficient blasting operations. Thus, the air
supply (compressor) must be of sufficient capacity. Insufficient
air supply results in excessive abrasive use and slower cleaning
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