Follow us on Facebook

Welding works

Green renewable energy with generator turbines

Navy

VLCC after very serious repairs

Blue Star Ferry - Drydock

Bottom of vessel after grit blasting

Superfast Ferries IX after various repairs and reconditionin

Hull painting

115.00 tone oil tanker moored offshore

Oil well with storage tanks after painting

Abrasive blasting of metal structures

Navy vessel after superstructure painting

On the right side: Chemical tank after painting

Ship in dry dock

Oil Rig after various special Paintings

Painting of steel building

Painting of Industrial warehouse

Fertilizer factory

Hosing down 200 bar

Fuel tank among maintenance

Crude oil tanker after various repairs on deck pipes

Storage tank before maintenance

Painting

High pressure blasting 1600 bar

Tankers near the station for oil

Blue Star Diagoras after external Low pressure washing & Painting

Submarine navy

Tank coating

Grit blasting of metal structures

Ultra high pressure water blasting 2.500 bar

Navy

Sand blasting of hull

Blue Star 1 after various repairs in NEORION Syros shipyard

Ships aft area after painting and drafts marking

Washing of building

Korean shipyard

Sand blasting of container ship

Fuel tanks

Blasting of paint for surface preparation

Final preparations before undocking

Sandblaster on duty

Technical Advisor & Project Manager

Completed hull of vessel in dry dock

High pressure blasting 1000 bar

Large fuel storage tanks

High pressure water blasting

Dynamic Co. cherry pickers

Painting of cruise vessel after low pressure washing

Industrial metal fuel tanks

Oil & Gas supertanker after various repairs

Pipe lines and gas tanks

Blue Star Diagoras after various repairs in Piraeus

Spot grit blasting

Inspection of hull

Petrochemical industrial plant

Painting of Bridge construction

Pipes transporting oil to storage tanks

Tanker vessel

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