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VLCC after very serious repairs

Blasting of paint for surface preparation

On the right side: Chemical tank after painting

Grit blasting of metal structures

Crude oil tanker after various repairs on deck pipes

Dynamic Co. cherry pickers

Fuel tank among maintenance

Hull painting

Ship in dry dock

Oil Rig after various special Paintings

Tank coating

Blue Star 1 after various repairs in NEORION Syros shipyard

Navy

Completed hull of vessel in dry dock

Sandblaster on duty

High pressure blasting 1600 bar

Storage tank before maintenance

Submarine navy

Painting

Navy

Superfast Ferries IX after various repairs and reconditionin

Inspection of hull

115.00 tone oil tanker moored offshore

Tankers near the station for oil

Pipe lines and gas tanks

Final preparations before undocking

Large fuel storage tanks

High pressure blasting 1000 bar

Petrochemical industrial plant

Painting of cruise vessel after low pressure washing

Bottom of vessel after grit blasting

Pipes transporting oil to storage tanks

Blue Star Diagoras after external Low pressure washing & Painting

Navy vessel after superstructure painting

Fuel tanks

Oil well with storage tanks after painting

High pressure water blasting

Hosing down 200 bar

Oil & Gas supertanker after various repairs

Sand blasting of hull

Green renewable energy with generator turbines

Sand blasting of container ship

Spot grit blasting

Industrial metal fuel tanks

Blue Star Ferry - Drydock

Abrasive blasting of metal structures

Welding works

Blue Star Diagoras after various repairs in Piraeus

Painting of Industrial warehouse

Technical Advisor & Project Manager

Painting of steel building

Ultra high pressure water blasting 2.500 bar

Fertilizer factory

Painting of Bridge construction

Ships aft area after painting and drafts marking

Tanker vessel

Korean shipyard

Surface treatment in which steel grit, sand, or other abrasive material is blown against an object to produce a roughened surface or to remove dirt, rust, and scale.

Abrasive-Blasting is the operation of forcibly propelling a stream of abrasive material against a surface under high pressure to smooth a rough surface, roughen a smooth surface, shape a surface, or remove surface contaminants. A pressurized fluid, typically air, or a centrifugal wheel is used to propel the media.

Common abrasives used include:

  • Steel shot
  • Steel grit
  • Glass bead
  • Crushed glass
  • Aluminum oxide
  • Silicon carbide
  • Plastic
  • Walnut shell
  • Corn cob
  • Baking soda
  • Ceramic grit
  • Copper slag

The table below gives a summary of the different qualities in surface preparations used by some standards.

Description Swedish SIS 05 5900 American SSPC-SP International ISO-8501-1
White metal Sa 3 SSPC – SP 5 Sa 3
Near white metal Sa 2½ SSPC – SP10 Sa 2½
Commercial blast Sa 2 SSPC – SP 6 Sa 2
Brush-off blast Sa 1 SSPC – SP 7 Sa 1
Power tool cleaning St 3 SSPC – SP 3 St 3
Hand tool cleaning St 3 SSPC – SP 2 St 2

Initial condition of steel as per ISO 8501-01.

Rust grade Pictorial example Description
A Steel covered completely with adherent mill scale and with, if any, little rust.
B Steel surface which has begun to rust and from which the mill scale has begun to flake.
C Steel surface on which the mill scale has rusted away or from which it can be scrapped, but with little pitting visible to the naked eye.
D Steel surface on which the mill scale has rusted away and on which cosiderable pitting is visible to the naked eye.

Pictorial examples of surface preparation according to ISO 8501-01

Cleaning standard Initial steel condition
A B C D
St2 – Hand tool cleaning Not applicable
St3 – Power tool cleaning Not applicable
Sa1 – Brush-off blast Not applicable
Sa2 – Commercial blast Not applicable
Sa2.5 – Near white metal
Sa3 – White metal

Machineries