Skip to content
BER-GRİT

Steel blasting

Removal of scale, rust, old coatings, and contamination from the surface and creation of a controlled surface profile for the paint system to adhere.

What blasting determines

Mill scale, rust, oil, and contamination remaining on the steel surface weaken paint adhesion. Proper blasting cleans the surface, creates a controlled profile, and provides a reliable foundation for the coating system to adhere to.

  1. 01 Surface cleanliness
  2. 02 Correct profile
  3. 03 Appropriate paint system
  4. 04 Controlled application
  5. 05 Measurement and report
  6. 06 Long service life

OMSG LAUCO 150 NP automatic line

Automatic turbine surface preparation for serial steel profiles, plates, and welded parts with suitable geometry. 2016 operating on the same line since

  • Fast and homogeneous surface preparation on suitable part geometries
  • Controlled abrasive blasting with a turbine system
  • Closed process with abrasive recovery and filtration
  • Surface inspection after blasting and controlled transfer to the painting process

Investment in a second automatic profile and plate processing line is planned.

OMSG LAUCO 150 NP automatic turbine blasting line: roller conveyor entry, abrasive recovery cyclone, and filtration unit.
Closed system
Abrasive recovery and filtration
Mass production
Repeatable process flow
Quality
Surface cleanliness and profile control

If your part does not fit the line

Manufactures not entering the automatic line cut-off 8 × 26 × 4,50 m are taken into a cabinet with internal double nozzles. The same cleanliness grades apply.

Large part blasting

Cleanliness grades

Which grade to apply is determined by the project specification. Visual acceptance reference ISO 8501-1, surface profile reference ISO 8503'type.

Close-up view of the surface after blasting: scale and rust removed, controlled profile formed.
Sa 2½ Very good blasting
A high level of cleanliness where scale, rust, old coatings, and foreign matter are almost completely removed, leaving only light traces.
Operator performing surface preparation with a nozzle inside the cabin.
Sa 3 Visually clean steel
One of the highest visual blasting cleanliness levels where the surface achieves a homogeneous metallic appearance. Applied when required by the project specification.

Sandblasting quality gates

Surface profile, dust control, and pre-paint time management are critical quality parameters, as is surface cleanliness.

  1. 01

    Pre-surface and grease contamination control

    Oil, grease, weld residue, edge condition, and masking needs are determined.

  2. 02

    Sa cleanliness degree

    The specified degree is verified with a visual reference.

  3. 03

    Surface profile

    The target roughness is measured and compared with the adhesion requirement of the paint system.

  4. 04

    Dust and contamination

    The level of dust, salt, and chloride remaining on the surface is checked.

  5. 05

    Pre-paint climate suitability

    Air and surface temperature, relative humidity, and dew point are recorded.

Frequently asked questions

The most frequently asked questions during the quotation phase. If you cannot find what you are looking for, you can write directly.

Sa 2½ is a very good blasting level: mill scale, rust, old coatings, and foreign matter are almost completely removed, leaving only slight traces on the surface. Sa 3 is one of the highest visual cleanliness levels where the surface achieves a homogeneous metallic appearance and is applied when required by project specifications. The visual acceptance reference for both levels is ISO 8501-1.

When customer specifications are provided with SSPC or NACE/AMPP definitions, we apply them by matching them with their ISO equivalents. If your specifications mention SP 5, SP 6, SP 10, or SP 11, we clarify which ISO level they correspond to together during the quotation phase.

The sandblasted surface is taken into the painting process as soon as possible, protected from dust, moisture, flash rust, and re-contamination. Since sandblasting and painting are in the same area, the part moves to the next step without leaving the facility. Air and surface temperature, relative humidity, and dew point are recorded before painting.

The adhesion of the paint system depends not only on cleanliness but also on the surface roughness. The target profile is determined based on the abrasive used and the paint manufacturer's requirements; it is measured with reference to ISO 8503 and recorded in the blasting report.

Serial steel profiles, plates, and welded parts with repeated cross-sections move faster on the automatic line. Fabrications that do not fit the line's cross-section, have protrusions, or are box-sectioned are processed in the large part booth. The route selection is determined by the part's geometry, not the industry.

Yes. The facility is located in Arslanbey OSB Kartepe and serves the entire Marmara industrial basin. The site is organized with vehicle access suitable for heavy part movement, a crane-equipped storage area, and two weighbridges; shipment coordination is also carried out under the same roof.

Evaluate your project with our technical team

Once the part information, desired surface preparation, and paint system are clarified, the quote is prepared in one step. You can directly attach your specification file if available.

Example: 60 tons of steel profile, Sa 2½, 50-70 µm surface profile.

  • Specification and drawing file can be attached
  • Unknown technical fields can be left blank
  • A reference number will be provided after submission