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Descriptions below explain SSPC & NACE abrasive cleaning requirements:

 

 

SSPC-SP 2 - A method of preparing steel surfaces by the use of non-powered hand tools.

 

Hand Tool Cleaning removes all loose mill scale, loose rust, loose paint, and other loose detrimental foreign matter. It is not intended that adherent mill scale, rust and paint be removed by this process. Mill scale, rust, and paint are considered adherent if they cannot be removed by lifting with a dull putty knife.

 

SSPC-SP 5 / NACE No. 1 –White Metal Abrasive Blast

 

When viewed without magnification shall be free of all visible oil, grease, dust, dirt, mill scale, rust, coating, oxides, corrosion products, and other foreign matter.

 

SSPC-SP 6 / NACE No. 3 –Commercial Abrasive Blast

 

 

SSPC-SP 7 / NACE No. 4 –Brush-off Abrasive Blast

 

When viewed without magnification shall be free of all visible oil, grease, dirt, dust, loose mill scale, loose rust, and loose coating. Tightly adherent mill scale, rust and coating may remain on the surface. Mill scale, rust, and coating are considered tightly adherent if they cannot be removed by lifting with a dull putty knife.

 

SSPC-SP 10 / NACE No. 2 –Near White Metal Abrasive Blast

 

When viewed without magnification shall be free of all visible oil, grease, dust, dirt, mill scale, rust, coating, oxides, corrosion products, and other foreign matter except random staining, which shall be limited to no more than 5% of each unit area of surface (3”X 3”) and may consist of light shadows, slight streaks, or minor discoloration caused by stains of rust, stains of mill scale, or stains of previously applied coating.

 

SSPC-SP 14 / NACE No. 8 –Industrial Abrasive Blast

 

When viewed without magnification shall be free of all visible oil, grease, dust, and dirt. Traces of tightly adherent mill scale, rust, and coating residues are permitted to remain in 10% of each unit surface area if they are evenly distributed. The traces shall be considered tightly adherent if they cannot be removed by with a dull putty knife. Shadows, streaks, and discolorations caused by stains of rust, mill scale and previously applied coating may be present on the remainder of the surface.

 

 

 

 

 

 

 

 

 

 

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