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Storage tank before maintenance

Bottom of vessel after grit blasting

Ultra high pressure water blasting 2.500 bar

Blue Star Diagoras after various repairs in Piraeus

Korean shipyard

Large fuel storage tanks

Fuel tank among maintenance

Petrochemical industrial plant

Spot grit blasting

115.00 tone oil tanker moored offshore

VLCC after very serious repairs

Completed hull of vessel in dry dock

Dynamic Co. cherry pickers

Sand blasting of hull

High pressure water blasting

Final preparations before undocking

Fuel tanks

Blue Star Diagoras after external Low pressure washing & Painting

Inspection of hull

Oil well with storage tanks after painting

Pipe lines and gas tanks

On the right side: Chemical tank after painting

Pipes transporting oil to storage tanks

Ship in dry dock

Tank coating

Tankers near the station for oil

High pressure blasting 1600 bar

Washing of building

Blasting of paint for surface preparation

Painting of cruise vessel after low pressure washing

Submarine navy

Green renewable energy with generator turbines

Painting of Industrial warehouse

Tanker vessel

Crude oil tanker after various repairs on deck pipes

Industrial metal fuel tanks

Grit blasting of metal structures

Abrasive blasting of metal structures

Hosing down 200 bar


Oil Rig after various special Paintings

Blue Star Ferry - Drydock



Navy vessel after superstructure painting

Blue Star 1 after various repairs in NEORION Syros shipyard

Painting of steel building

Sand blasting of container ship

High pressure blasting 1000 bar

Technical Advisor & Project Manager

Ships aft area after painting and drafts marking

Hull painting

Painting of Bridge construction

Sandblaster on duty

Fertilizer factory

Oil & Gas supertanker after various repairs

Superfast Ferries IX after various repairs and reconditionin

Welding works

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
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