| Brush
Off |
|
SA-1
|
|
Swedish
Standards Organisation |
| |
|
SSPC-SP7
|
|
Steel
Structures Painting Council (USA) |
| |
|
NACE
No. 4 |
|
National
Association of Corrosion Engineers |
| Commercial |
|
SA-2
|
|
Swedish
Standards Organisation
|
| |
|
3rd
Quality |
|
United
Kingdom Standards (BS 4232)
|
| |
|
SSPC-SP6
|
|
Steel
Structures Painting Council (USA)
|
| |
|
NACE
No. 3 |
|
National
Association of Corrosion Engineers |
| Near-White
Metal |
|
SA-2.5
|
|
Swedish
Standards Organisation
|
| |
|
2nd
Quality |
|
United
Kingdom Standards (BS 4232)
|
| |
|
SSPC-SP10
|
|
Steel
Structures Painting Council (USA)
|
| |
|
NACE
No. 2 |
|
National
Association of Corrosion Engineers |
| White
Metal |
|
SA-3
|
|
Swedish
Standards Organisation
|
| |
|
1st
Quality |
|
United
Kingdom Standards (BS 4232)
|
| |
|
SSPC-SP5
|
|
Steel
Structures Painting Council (USA)
|
| |
|
NACE
No. 1 |
|
National
Association of Corrosion Engineers |
| |
|
|
|
|
| You
should consult with your local standards organisation to obtain complete
specifications on degrees of surface cleanliness for your country. |
| |
|
|
|
|
| General
Description of the Main Blast Standards |
|
Brush
Off
Brush off blast cleaning is a method of preparing the surfaces which,
when viewed with magnification, shall be free of all visible oil,
grease, dirt, dust, mill scale, rust and paint/coatings. Tightly
adherent mill scale, rust and old paint/coatings may remain on the
surface. Mill scale rust and old paint/coatings are considered adherent
if they cannot be removed by lifting with a blunt putty knife. |
|
Commercial
Commercial blast cleaning is a method of preparing the surfaces
which, when viewed with magnification, shall be free of all visible
oil, grease, dirt, dust, mill scale, rust and paint/coatings. Generally
evenly dispersed very light shadows, streaks and discoloration’s
caused by stains of rust, mill scale or previously applied paint/coatings
may remain on no more than 33% of the surface. Slight residues of
rust and paint/coatings may also be left in the craters of pits
if the original surface is pitted. |
|
Near-White
Metal
Near white metal blast cleaning is a method of preparing the surfaces
which, when viewed with magnification, shall be free of all visible
oil, grease, dirt, dust, mill scale, rust and paint/coatings. Generally
evenly dispersed very light shadows, streaks and discoloration’s
caused by stains of rust, mill scale or previously applied paint/coatings
may remain on no more than 5% of the surface. |
|
White
Metal
White metal blast cleaning is a method of preparing the surfaces
which, when viewed with magnification, shall be free of all visible
oil, grease, dirt, dust, mill scale, rust and paint/coatings. |
| |
|
|
|
|
| You
should consult with your local standards organisation to obtain complete
specifications on degrees of surface cleanliness for your country. |
