Water Blast Cleaning

Definition - What does Water Blast Cleaning mean?

Water blast cleaning is a technique for cleaning internal and external surfaces, which relies entirely on the sheer force of water from a pressurized source to achieve the desired cleaning effect on the intended surface. Abrasives or toxic chemicals are not used by water blasting systems.

A highly pressurized and focused stream of water, generally above 10,000 psi, comes from a water-blasting machine, which includes a pressure pump and special nozzles. This cleaning method may require enclosures to protect adjacent areas or structures from unwanted water spray and a collector or catcher for the blasted-off waste or contamination.

Water blast cleaning is used in a growing number of applications previously dominated by abrasive blasting techniques.

Water blast cleaning is also known as water blasting or hydro-blasting.

Corrosionpedia explains Water Blast Cleaning

Water blast cleaning can effectively remove a wide variety of contaminants in hard-to-reach places in a safe and effective manner. The results are comparable to cleaning techniques that use abrasives and cleaning agents, but without the dust and other health hazards.

Water blasting operations are commonly categorized as high-pressure and ultra-high pressure based on the following operating pressures:

  • High-pressure blasting – pressures from 690 bar (10,000 psi) to 1,700 bar (25,000 psi)
  • Ultra high-pressure blasting – pressures of more than 1,700 bar (25,000 psi)

It is important that water blasting is done correctly. The very high-pressure water stream can injure a person or animal that it hits. Also, there are coatings, residues and other dirt buildups that will be resistant to water blasting.

In addition to its effectiveness as an industrial, commercial and domestic cleaning method, water blasting offers the following advantages:

  • The water stream can be focused on small areas so that it can selectively remove coatings without damaging the nearby surfaces.
  • Water is less corrosive and harmful than other cleaning agents.
  • After blasting, there is less clean-up work because water will just flow or dry up; there is no risk of clogging the blasting machine and other equipment.

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