4 General Technical Specification of Bhilai Steel Plant, SAIL ...
4 General Technical Specification of Bhilai Steel Plant, SAIL ...
4 General Technical Specification of Bhilai Steel Plant, SAIL ...
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© 2007 MECON Limited<br />
All rights reserved<br />
<strong>General</strong> <strong>Technical</strong> <strong>Specification</strong><br />
Surface Preparation Grade<br />
Sl.<br />
Surface Preparation<br />
No.<br />
1 Blast cleaning to white metal<br />
Removal <strong>of</strong> all visible rusts, mill-scales, paint and<br />
foreign matters.<br />
2 Blast cleaning to near white metal:<br />
95% <strong>of</strong> any section <strong>of</strong> surface area is free from all<br />
rusts, mill-scales and visible residues.<br />
3 Blast cleaning to commercial quality:<br />
At least 2/3 <strong>of</strong> any section <strong>of</strong> the surface area is free<br />
from all rusts, mill-scales and visible residues.<br />
4 Brush-<strong>of</strong>f blast cleaning:<br />
Removal <strong>of</strong> all loose mill-scales, rust and foreign<br />
matters etc.<br />
5 Power tool cleaning:<br />
Very thorough scrapping and wire brushing to<br />
remove loose mill-scale, rust and foreign matters to<br />
have pronounced metallic shine.<br />
6 Hand tool cleaning:<br />
Removal by hand brushing <strong>of</strong> loose mill-scale, loose<br />
rust and foreign matters.<br />
Painting<br />
Page 8 <strong>of</strong> 19<br />
Swedish Std<br />
SIS 055900<br />
Annexure-01<br />
DIN Std. Din<br />
55928 (Part 4)<br />
Sa 3 Sa 3<br />
Sa 2.5 Sa 2.5<br />
Sa 2 Sa 2<br />
Sa 1 Sa 1<br />
St 3 St 3<br />
St 2 St 2<br />
GS-09
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