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Ship in dry dock

Oil Rig after various special Paintings

Pipe lines and gas tanks

Korean shipyard

Painting of cruise vessel after low pressure washing

Abrasive blasting of metal structures

Large fuel storage tanks

Inspection of hull

On the right side: Chemical tank after painting

Grit blasting of metal structures

Bottom of vessel after grit blasting

Blue Star Ferry - Drydock

Storage tank before maintenance

High pressure blasting 1600 bar

Navy vessel after superstructure painting

Blue Star Diagoras after various repairs in Piraeus

High pressure blasting 1000 bar

Oil & Gas supertanker after various repairs

Tankers near the station for oil

Fuel tank among maintenance

Submarine navy

Completed hull of vessel in dry dock

Painting of Industrial warehouse

Blue Star Diagoras after external Low pressure washing & Painting

Ultra high pressure water blasting 2.500 bar

Final preparations before undocking

Painting of Bridge construction

Sand blasting of hull

Dynamic Co. cherry pickers

115.00 tone oil tanker moored offshore

Fertilizer factory

Pipes transporting oil to storage tanks

Crude oil tanker after various repairs on deck pipes

Green renewable energy with generator turbines

Oil well with storage tanks after painting

Spot grit blasting

Blasting of paint for surface preparation

Fuel tanks

Technical Advisor & Project Manager

High pressure water blasting

Painting

Tanker vessel

VLCC after very serious repairs

Blue Star 1 after various repairs in NEORION Syros shipyard

Tank coating

Navy

Navy

Petrochemical industrial plant

Industrial metal fuel tanks

Painting of steel building

Ships aft area after painting and drafts marking

Sandblaster on duty

Welding works

Sand blasting of container ship

Hosing down 200 bar

Hull painting

Superfast Ferries IX after various repairs and reconditionin

Hydro-Blasting, commonly known as water blasting. In Hydro-Blasting, a highly pressured stream of water is used to remove old paint, chemicals, or buildup without damaging the original surface. This method is ideal for cleaning internal and external surfaces because the operator is generally able to send the stream of water into places that are difficult to reach using other methods. Another benefit of Hydro-Blasting is the ability to reducing waste and mitigating environmental impact.

Hydro-Blasting stripping or cleaning, or water blast cleaning, is a common used method for the removal of material, coating, or contamination from the surface of a steel plate, pipe, machinery etc. Dynamic Co. has experience with all methods of Hydro-Blasting methods and specializes in ultra high pressure blasting.

Dynamic Co. Operates High pressure jets and Ultra high pressure blasting uses water that is pressurized between 12.000 to 36,000 psi (800bar-2500Bar) to remove coatings and debris from substrates.

The Hydro-Blasting method removes these paints with one of two different categories: erosion or delamination. Erosion is commonly applied mostly on the high performance coatings namely, metal and carbide thermal spray coatings and a special nozzle is operating to convert the water stream into smaller pencilled stream, which affect the surface of the coating and thus small pieces of the coating to erode off the surface, leaving the substrate intact.

Hydro-Blasting machines consist of the following subsystems:

  • Pump to pressurize the water.
  • Nozzle to deliver the correct stream of water to the work piece.
  • Enclosure to contain process.
  • Nozzle and part manipulators.
  • Waste handling equipment.
  • Process control devices.

The Hydro-Blasting method has a number of advantages over competing conventional processes used to remove coatings. Usually the coatings removed with ultra high pressure blasting were applied either by the use of chemicals or other conventional mechanical means such as grit blasting , mechanical tooling, hammering, scraping or machining. Chemical cleaning is expensive, slow, and non Eco friendly. Grit blasting or mechanical tooling is more cost effective and faster than chemical processing, but cannot separate the coating and the substrate, which often causes removal of excessive material.

Definitions and suitable water pressures range.

Definition Pressure (Bar) Pressure (psi) Flow rate (l/min)
Low pressure water cleaning < 68 < 1000
High pressure water cleaning 68 – 680 1000 to 10.000 90 – 50
High pressure Hydro-Blasting 680 – 1700 10.000 to 25.000 50 – 25
Ultra high pressure Hydro-Blasting > 1700 > 25.000 Down to 12

Relation water pressure, effect of cleaning and production rates.

Pressure (bar) Removal of: Typical speed (m2/hr)
Up to 500 Fouling, salt and dirt. 300
> 1000 Also loose rust and paint.
Firm adherent paint remains.
150 (machine)
> 2000 All coatings.
Restores original roughness profile.
5 (handgun)
100 (machine)
> 4000 All coatings.
Creates roughness profile.

Machineries