04.08.2013 Views

Volume-II of IV - GAIL

Volume-II of IV - GAIL

Volume-II of IV - GAIL

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

S.<br />

NO.<br />

DESCRIPTION<br />

3. BLAST CLEANING (AIR & WATER)<br />

THERE ARE FOUR COMMON GRADES<br />

OF BLAST CLEANING<br />

3.1 WHITE METAL<br />

BLAST CLEANING TO WHITE METAL<br />

CLEANLINESS REMOVAL OF ALL<br />

3.2<br />

VISIBLE RUST, MILL SCALE PAINT &<br />

FOREIGN MATTER 100% CLEANLINESS<br />

WITH DESIRED SURFACE PROFILE.<br />

NEAR WHITE METAL<br />

BLAST CLEANING TO NEAR WHITE<br />

METAL CLEANLINESS, UNIT AT LEAST<br />

95% OF EACH ELEMENTS OF SURFACE<br />

AREA IS FREE OF ALL VISIBLE<br />

RESIDUES WITH DESIRED SURFACE<br />

PROFILE.<br />

TABLE-I (for clause 5.0)<br />

SURFACE PREPARATION STANDARDS<br />

VARIOUS INTERNATIONAL STANDARDS<br />

SWEDISH<br />

STANDARD<br />

SIS-05-<br />

5900 1967<br />

(EQU<strong>IV</strong>ALENT)<br />

SSPC-SP<br />

USA<br />

SA-3 SSPC-SP-<br />

5<br />

SA 2 ½ SSPC-SP-<br />

10<br />

NACE<br />

USA<br />

Page 15 <strong>of</strong> 49<br />

BRITISH<br />

STANDARD<br />

BS-4232:<br />

1967<br />

NACE#1 FIRST<br />

QUALITY<br />

NACE<br />

#2<br />

SECOND<br />

QUALITY<br />

REMARKS<br />

WHERE EXTREMELY<br />

CLEAN SURFACE CAN<br />

BE EXPECTED FOR<br />

PROLONG LIFE OF<br />

PAINT SYSTEMS.<br />

THE MINIMUM<br />

REQUIREMENT FOR<br />

CHEMICALLY<br />

RESISTANT PAINT<br />

SYSTEM SUCH AS<br />

EPOXY, VINYL,<br />

POLYURETHANE<br />

BASED AND INORGANIC<br />

ZINC SILICATE PAINTS,<br />

ALSO FOR<br />

CONVENTIONAL PAINT<br />

SYSTEM USED UNDER<br />

FAIRLY CORROS<strong>IV</strong>E<br />

CONDITIONS TO<br />

OBTAIN DESIRED LIFE<br />

OF PAINT SYSTEM.

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!