Shot-blasting

Thanks to this preparation process, in addition to the elimination of any iron oxide, a roughness of around 45-70 microns is obtained so to allow perfect adhesion of the coating.

Mechanical shot blasting is the fundamental prerequisite of each coating operation and the only one that ensures its success, which is why it is always essential.

The sandblasting systems of the tube use powerful turbines that shoot the grit at very high speed while the pipe moves with a rotary-translational motion. For internal shot-blasting the process is similar, with suitable nozzles getting inside the whole length of the pipe.

SIZE RANGE

Shot-blasting of the internal surface is carried out on the whole range of sizes of coatings and linings, according to ISO 8501-1 and customer specifications.

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IN-DEPTH

In order to achieve the best performances of coatings and lining a suitable degree of cleanliness and roughness must be achieved, and the chosen process is grit blasting using a mixture of both spherical and angular grit, of suitable and variable size and proportions, so to achieve minimum Sa 2 ½ up to Sa 3 degree of cleanliness and roughness with defined ranges (40-60 micron; 60-80 micron, etc) according to the specific kind of coating and its required thickness. The surfaces are then treated with pressure air jets to remove residual dusts and coated right away. Regular checks on ambient parameters of temperature and humidity, degree of shot blasting, roughness and dustiness are carried out in order to ensure the quality of the production. The intense care in carrying out the grit blasting process it’s the first essential step for excellence in coating

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