Blasting

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Blasting

DanGard sandblasts and varnishes components and constructions in all shapes and sizes. Small and large steel structures such as:

  • Wind turbine components
  • Wind turbine towers
  • Stairs
  • Railings
  • Gas tanks
  • Machine parts
  • Containers
  • …and much more.

We use the most environmentally friendly abrasives for the task and ensure the best waste management with a minimum of waste. As far as possible, the waste is recycled again – we have a strong focus on recycling.

Sandblasting/grit blasting is an important pre-treatment method for the subsequent surface treatment to achieve optimal adhesion and correct corrosion class.

At DanGard, steel grit is primarily used as an abrasive. Steel grit removes rust, oxide scale, and discolouration. Steel grit makes a rough surface, which is suitable for painting, glueing or plastic coating. The advantage of steel grit is, among other things, that it can be recycled.

The degree of sandblasting is defined in ISO 8501-1 and is as follows:

Sa 1: Light sandblasting
Visually, the surface must be free of visible oil, grease, as well as attached oxide scale, rust, paint, and impurities.
Sa 2.5: Very thorough sandblasting
Visually, the surface must be free of visible oil, grease, and dirt, as well as oxide scale, rust, paint, and impurities. Any remaining traces of contamination should only appear as small stains in the form of stains or streaks.
Sa 2: Thorough sandblasting
Visually, the surface must be free of visible oil, grease, and dirt, as well as mostly oxide scale, rust, paint layers, and impurities. Residual contamination must be fixed.
Sa 3: Sandblasting to pure steel
Visually, the surface must be free of visible oil, grease, and dirt and free of oxide scale, rust, paint, and impurities. It must have a uniform metallic colour.

Sling cleaning

When sling cleaning steel blanks, rotating wheels sling the abrasives towards the blanks instead of using compressed air. Sling cleaning is increasingly used due to large energy savings compared to sandblasting with compressed air.

Today, we have several types of sling cleaning systems for both large and small items.

Advantages of sling cleaning:

  • Good economy
  • Saves energy compared to sandblasting with compressed air
  • Saves expensive person-hours
  • Protects the environment
  • Provides a good finish.