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115.00 tone oil tanker moored offshore

Ultra high pressure water blasting 2.500 bar

Crude oil tanker after various repairs on deck pipes

Ship in dry dock

Inspection of hull

Welding works

Blue Star Diagoras after external Low pressure washing & Painting

Blue Star Ferry - Drydock

Washing of building

Ships aft area after painting and drafts marking

Abrasive blasting of metal structures

Tankers near the station for oil

Painting of cruise vessel after low pressure washing

Painting of steel building

On the right side: Chemical tank after painting

Korean shipyard

Fertilizer factory

High pressure blasting 1000 bar

High pressure water blasting

Technical Advisor & Project Manager

Fuel tanks

Storage tank before maintenance

Oil Rig after various special Paintings

Blue Star 1 after various repairs in NEORION Syros shipyard

Painting of Bridge construction

Oil & Gas supertanker after various repairs

Final preparations before undocking

Completed hull of vessel in dry dock

Industrial metal fuel tanks

Bottom of vessel after grit blasting

Hull painting

Painting

Submarine navy

Spot grit blasting

Green renewable energy with generator turbines

Navy

Grit blasting of metal structures

Sandblaster on duty

Navy vessel after superstructure painting

Superfast Ferries IX after various repairs and reconditionin

Sand blasting of container ship

Sand blasting of hull

Dynamic Co. cherry pickers

Fuel tank among maintenance

Pipes transporting oil to storage tanks

Tank coating

Tanker vessel

Large fuel storage tanks

Blasting of paint for surface preparation

Hosing down 200 bar

VLCC after very serious repairs

Oil well with storage tanks after painting

Navy

Painting of Industrial warehouse

High pressure blasting 1600 bar

Blue Star Diagoras after various repairs in Piraeus

Petrochemical industrial plant

Pipe lines and gas tanks

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