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JOB SPECIFICATION<br />
FOR SURFACE PREPARATION<br />
AND PROTECTIVE COATING<br />
JOB SPECIFICATION No.<br />
A307-000-06-42-PLS-01<br />
Rev.0<br />
PAGE 33 OF 49<br />
TABLE 15.0<br />
COATING UNDER INSULATION (COASTAL OR INLAND PLANTS). ALL<br />
UNITS AREAS & OFF-SITES<br />
For insulated Piping, Equipments, Storage vessels, tanks, Columns etc of Carbon<br />
Steel, LTCS, Low Alloy Steel & Stainless Steels<br />
Sl.<br />
No.<br />
Design<br />
Temp. in o C<br />
Surface<br />
Preparation &<br />
Preerection/Shop<br />
Primer<br />
Coating System<br />
(Post-erection / Field)<br />
Primer/<br />
Intermediate<br />
15.1 Carbon steel, LTCS and low Alloy steel Piping<br />
15.1.1 -45 to 120<br />
15.1.2 121-540<br />
SSPC-SP-10;<br />
1coat of F-15 @<br />
75µ DFT/coat<br />
SSPC-SP-10;<br />
1coat of F-12 @<br />
20µ DFT/coat<br />
1 coat of F-15 @<br />
75µ DFT/coat<br />
None<br />
Finish Coat<br />
2 coats of F-15 @<br />
75µ DFT/coat;<br />
(2x75= 150)<br />
2coat of F-12 @<br />
20µ DFT/coat;<br />
(2x20=40)<br />
Total<br />
Final<br />
DFT<br />
in<br />
Microns<br />
(min.)<br />
Remarks<br />
225- 250 -<br />
60 -<br />
15.2 Carbon steel, LTCS and low Alloy steel - Storage vessels, Reactors, Columns & Equipments<br />
15.2.1 -45 to 120<br />
15.2.2<br />
121 to 400<br />
SSPC-SP-10;<br />
1coat of F-15 @<br />
75µ DFT/coat<br />
SSPC-SP-10;<br />
1 coat of F-9 @<br />
65-75 µ DFT/coat<br />
1 coat of F-15 @<br />
75µ DFT/coat<br />
None<br />
15.3 Stainless Steel (SS) including Alloy-20 piping (Note:2)<br />
2 coats of F-15 @<br />
75µ DFT/coat;<br />
(2x75= 150)<br />
3 coats of F-12 @<br />
20µ DFT/coat<br />
OR<br />
1 coat of F-16 @<br />
60 µ DFT/coat<br />
300 -<br />
125-135 -<br />
15.3.1<br />
-180 to Zero<br />
15.3.2 0 to 125<br />
15.3.3 126 to 400<br />
For CS<br />
SSPC SP-6<br />
Commercial Blast<br />
For SS<br />
SSPC SP-1 with<br />
non-chloride<br />
solvent<br />
SSPC-SP-10<br />
(15-25µ surface<br />
profile)<br />
1 coat of F-15@<br />
80 µ DFT/coat<br />
SSPC-SP-10<br />
1 coat of F-16 @<br />
125 µ DFT/coat<br />
1 coat of inert<br />
polymeric matrix<br />
coating @ 125 µ<br />
1 coat of F-15<br />
intermediate coat<br />
@80 µ DFT/coat<br />
None<br />
2 coats of inert<br />
polymeric matrix<br />
coating @ 125 µ<br />
1 coat of F-15<br />
finish coat@ 80<br />
µ DFT/coat;<br />
1 coat of F-16 @<br />
125 µ DFT/coat<br />
350-400<br />
240<br />
250<br />
Products from<br />
JOTUN or HI-<br />
TEMP coatings or<br />
SK<br />
FORMULATIONS<br />
are recommended.<br />
If the piping &<br />
equipments are<br />
already erected<br />
then surface shall<br />
be prepared by<br />
cleaning with<br />
emery paper and<br />
wash/flush with<br />
chloride free DM<br />
water followed by<br />
wiping with<br />
organic solvent<br />
Not recommended<br />
for operating<br />
temperature<br />
Format No. 8-00-0001-F1 Rev. 0<br />
Copyright <strong>EIL</strong> – All rights reserved<br />
Page 272 of 291
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