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JOB SPECIFICATION
FOR SURFACE PREPARATION
AND PROTECTIVE COATING
JOB SPECIFICATION No.
A307-000-06-42-PLS-01
Rev.0
PAGE 27 OF 49
TABLE 11.0
COATING SYSTEM FOR EFFLUENT TREATMENT PLANT (ETP)
Sl.
No.
11.1
11.2
11.3
11.4
Design Temp.
in o C
Surface Preparation
Coating System
Primer
Finish Coat
Total
DFT in
Microns
(min.)
Remarks
For External Surfaces of C.S./M.S. items: Screens, Walk way bridges, Baffles, Dual media filters,
Vertical pumps, piping in treated effluent sump, bio sludge pump, Screw pump and pump house, CS
tanks, sumps and vessels.
-14 to 80 SSPS-SP-10
1 coat of F-9
@ 65-75µ
DFT/coat
2 coats of
F-6A @100µ
DFT/coat + 1
coat of F-2 @
40µ
DFT/coat;
(2x100+40=2
40)
305-315 -
For Internal Surfaces of CS/MS Items: Bio-sludge sump, Filter feed sump, Process sump, Sanitary
sump, Transfer sump, Sludge, Slop oil tank, scrapping mechanism in Clarifier
3 coats of
1 coat of F-9
F-6A @100µ
-14 to 80 SSPS-SP-10 @ 65-75µ
365-375 Note:1
DFT/coat
DFT/coat.
(3x100=300)
All R.C.C./concrete surfaces exposed to effluent water / liquid such as tanks, structures, drains etc.
in Process sump, TPI separator (Process and Oil), Aeration Tank and Transfer sump etc.
Epoxy screed
lining shall be
Blast cleaning to SSPC-SP
applied as per
guide lines and Acid
specific
-14 to 80 etching with 10-15% HCl Epoxy Screed lining 3mm
manufacturer
acid followed by thorough
and Engineerin-Charge
water washing.
instructions
C.S/M.S Dual media filters (Internal), Chemical dosing tanks(internal) such as Di-Ammonium
Phosphate (DAP) and Urea
Natural
Rubber lining
shall be
Up to 60 SSPC-SP-10
Natural Rubber Lining
(As per IS 4682, Part 1) 4.5mm
applied as per
specific
manufacturer
and Engineerin-Charge
instructions
NOTES
1. The paint /coating manufacturers shall provide their Quality control test certificate of coating
materials (F-6A) for immersion service of the exposed effluent given in 11.2.
Format No. 8-00-0001-F1 Rev. 0
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