Volume-IF - JantERmantER

DCPL-K4A02
paint shall, after fabrication, be cleaned of oil or grease by solvent cleaners
and be cleaned of dirt and other foreign material by through sweeping with a
fibre brush.
After completion of the precleaning, the metal surface shall immediately
painted with red oxide zinc chromate primer conforming to IS : 2074.
In highly corrosive environment, all steelwork shall be given a coat of shop
paint, applied thoroughly and evenly to dry surfaces which have been
cleaned by sand blasting to SA 2/1/2 grade minimum. The shop paint shall
be epoxy rasin based zinc rich primer such as Blast Steel EZ1 of Shalimer
Paint Limited.
3.13.2 Inaccessible parts
Surfaces not in contact, but inaccessible after assembly, shall receive two
coats of shop paint, positively of different colours to prove application of two
coats before assembly. This does not apply to the interior of sealed hollow
sections.
3.13.3 Contact surfaces
Contact surface shall be cleaned in accordance with Sub-clause 3.13.1
before assembly.
3.13.4 Finished surfaces
Machine finished surfaces shall be protected against corrosion by a rust
inhibiting coating that can be easily removed prior to erection or which has
characteristics that make removal unnecessary prior to erection.
3.13.5 Surfaces adjacent to field welds
3.14.0 Galvanizing
3.14.1 General
Unless otherwise provided for, surfaces within 50 mm of any field weld
location shall be free of materials that would prevent proper welding or
produce objectionable fumes while welding is being done.
Structural steelwork for switchyard or other structures as may be specified in
the Contract shall be hot dip galvanized in accordance with the American
Society for Testing and Materials Specification ASTM-A 123 or IS : 2629 -
Recommended practice for Hot-Dip Galvanising of Iron and steel. Where
the steel structures are required to be galvanized the field connection
materials like bolts, nuts and washers shall also be galvanized.
3.14.2 Surface Preparation
(PCA.774.S034sca4) V.II-D2/S-IV : 17