NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
KALINGA NAGAR INDUSTRIAL COMPLEX
DUBURI, ORISSA - 755026
GENERAL SPECIFICATION
ON PAINTING
(GS-02)
NINL-PHASE-II
MECON LIMITED
RANCHI - 834002
INDIA
NO.MEC/GS/Q693/11/37/02, Rev.3
JANUARY, 2006
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
01
GENERAL
01.01
This
speci fication covers t he m ateri als, tools, facilities
and qualit y requi rement for surface preparation and p aintin g
of steel stru ctures, equipm ent, pipin g, ducts, chutes , wood
work et c. requi red for Neelach al Ispat Ni gam Ltd. (NIN L),
Duburi , Orissa
01.02
This is onl y a gen eral guid eline o f th e painting s ch eme to
be followed b y t he Tend erer. Ho wev er, in case a s pecifi c
painting p roced ure is stipulat ed i n an y t enderin g
speci fication , then this general guideline
shall be
superceded. An y speci al cas e which m a y arise from tim e
to time shall be dealt with individuall y on the merit o f each
cas e
The term “paintin g” referred herei n cov ers rust prev entive ,
fun gus/ins ects preventive and decorativ e coating along with
surface protection o f the follo wing area but not limit ed to
the areas indicated b elow.
01.03
i.
ii.
iii.
iv.
v.
vi.
Structu ral st eel works
Mechani cal equipm ent
Elect rical equipment
Instrum ent ation and control eq uipment.
Pipe wo rk
Ox ygen plant, etc.
01.04
Surfaces made o f asbestos, aluminu m, brass , bronze,
galvanized st eel ,
stai nless steel, cast iron and oth er
corrosion resistant allo ys and rubb er/s yn thetic pol ym er/ fiber
reinforcem ent plastic and bu ried pi pe work are not requi red
to be paint ed unles s specifi ed ex cept fo r aesthetic purposes
or for id entifi catio n bands, wh erever rel evant.
01.05
All machined mating s urfaces (eg. fl an ges) sh all b e properl y
cleaned,
greased and prot ect ed b efo re dispatch.
- 01 -
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
01.06
The complet e paint s yst em for an y item includes th e
followin g basi c acti vities :
i)
ii)
iii)
iv)
Proper surface
Application of
Application of
Application of
prep aration
p rimer co ats
int ermediat e coats
fi nis hed coats
All the above coat s shall be of qu alit y p aint produ cts and o f
approved make. Th e scop e o f work sh all also i nclud e s uppl y
of all paint m aterial s as p er specifi catio n des crib ed h erein.
01.07
If the contract or d es ires to adopt alt ernat ive p aint s yst em fo r
an y speci fic item for an imp rov ement or equivalent t o the
s yst em sp eci fied here-in h e m a y do so su bject to purchaser’s
approval.
01.08
Paintin g and surface preparation of th e equipm ent to be
execut ed outside In dia shall be carried out and tested as per
the code and practi ces indicated in the l atest sp eci fication o f
steel structures. Pai nting Council (SSPC) USA or D IN 55928
or as per the Nation al Stand ards In stitut ion of t he countr y of
ori gin.
02
SURFACE
02.01
Surface prep aration being a p re requ isite fo r an y paint
application , shall be such as to cl ean th e surface thorou ghl y
of an y mat eri al which will be cond ucive to prem ature
failure o f the p aint s ubstrat es.
02.02
All surfaces shall be cl eaned of lo ose substan ces, an d
forei gn mat erial s, such as dirt, rust, scale, oil, grease,
welding flux , et c. irresp ectiv e of wheth er the sam e has been
spelt out in the st andards in order th at the prime coat is
ri gidl y anchored t o the virgin met al s urface. The surface
preparation shall confirm to pict ori al repres entatio n of
surface q ualit y grad e o f Swedish St andards Institution S IS
– 055900 o r equiv al ent stand ards such as SSPC – VIS – 1.67
or D IN 55928(Part 4) or BS 4232 o r IS 1477 – 1 971 (Part I)
PRE PARATION
- 02 -
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
02.03
The acceptable surface prep aration q ualit y / grad e are
describ ed under each paint s ystem. The procedu res covered
are solvent cl eani ng, hand tool cleanin g, power tool
cleanin g, blast cl eaning, wood surface cleaning, fl ame
cleanin g and pickli ng to att ain desi red surface qualit y as
requi red b y the sp ecific primer p aint. For read y reference
surface preparatio n qualit y grade to be adopt ed in resp ect o f
S IS 055900 and DIN 55928 (part-4 ) is gi ven in Ann ex ure-01.
02.03.01
Solvent Cl eaning
The surface sh all b e cl ean ed b y wipin g, immersion, sp ra yi n g
or v apour co ntactin g of a suit able s olv ent or washing with
an em ulsion or alk aline solution t o rem ove oil, greas e, di rt,
old paint , etc. Solvent cl eanin g sh al l not remo ve rust,
scal es, mill scal es or weld flux. Therefo re, b efo re
application of pai nt, solvent cleanin g shall be followed b y
other cl eanin g procedures as stat ed in subsequ ent chapt ers.
02.03.02
Hand Tool Cleanin g
The surface s hall be cleaned manuall y b y vi gorous wire
brushing as per grade St-2 qu alit y o f Swedish Standard
Institution S IS 055900 and DIN 555928. This m ethod
effectivel y removes loosel y adh erent materi als, but wo uld
not affect residu es of rust or mill scales that are int act are
firml y adh erent. Finall y the surface is t o be cleaned with a
vacu um cl eaner or with cl ean comp ress ed ai r o r with clean
brush. Aft er prep aration th e su rface shall have a faint
metallic sheen. The appearan ce shall co rrespo nd to the p rints
desi gn ated St – 2.
02.03.03
Power Tool Cleaning
The su rface shall be cleaned b y el ect ric or pneumati c tools,
such as brus hes, sanding m achin es, di sc abrasiv e grinder,
rotar y dis c s cal er et c. to St – 3 qualit y. The tools sh all b e
used carefull y to prevent excessive ro ughenin g of surface
and formatio n of rid ges an d burrs. This method will remov e
loosel y adherent material s but would n ot affect residu es o f
rust or mill scales th at are firml y adherent and int act.
- 03 -
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
02.03.04
Blast Cl eaning
The surface sh all be cleaned b y impin gement of abrasiv e
materi als, such as grad ed s and at hi gh velocit y created b y
clean and dr y co mpress ed air bl ast as per the grad e
accordi n g to Swedis h Standard Instituti on S IS 0 55900 .Thi s
method will remove loosel y adherent materi als as well as
adherent scales and mill scal es .Prio r to application o f bl ast,
heav y dep osit of o il and greas e are removed b y solvent
cleanin g excessi ve s urface s cal es are removed b y hand tool s
or power tool clean ing. Th e ex tent o f remov al of ad herent
scal es is vari ed, depen din g on t he application an d are
defined b y the surface qualit y grades Sa1, Sa2, Sa2.5 an d
Sa3 in the ord er o f increasi n g cleanlin es s. The blast cleanin g
is not recomm end ed for s heet met al work.
02.03.05
Wood Surface Prep aration
All new wood work surfaces shall be dried, cleaned and
rubbed down with sand paper follo wed b y removal of al l
dusts. Resinous knot s, resin pat ch es, voi ds, cracks are to be
seal ed properl y with mix of wood dusts and “Fevicol ” or an y
suitable s ealer. Sealers should be al lowed to dr y after
application for a p eriod of at l east 16 hrs or so. Th e woo d
surface should be rubbed down smooth b y abrasiv e pap er
followed b y fine talc/soapston e p owder co atin g before
makin g read y for pri ming.
02.03.06
Flame Cleaning
The surface is cleaned b y rapid heating b y means of
ox yacet yl ene fl ame to loosen the adh erent s cal es, follo wed
immediat el y b y wi re brushing. This method will remov e
loosel y adherent material s as well as m ost of th e ad herent
scal es and mill scales. In ord er to minimize or preven t
distortion fl ame cutt ing shall not be used on members havin g
thickness of 6 mm and lower.
02.03.07
Pi ckling
In this method the s urface is cleaned o f mill scales, rust or
rust scal es b y chemi cal reactio n or el ect rol ysis or both.
- 04 -
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
03.
PAINT APPLICAT ION
03.01
Pain ts
03.01.01
Paint shall b e applied in accordance with paint
manufact urer’s recommendatio ns. Th e work shall generall y
follow IS 1477 – 19 71 (P art II) for jobs carri ed out in In dia
and SSPC-PA-1 or DIN 559 28 or eq uiv alent fo r jobs carried
out outsid e India.
03.01.02
General compati bilit y bet ween primer and finishing pai nts
shall be est ablished by th e p aint m anufacturer suppl yi n g th e
paints.
03.01.03
In the ev ent of con flict b etween thi s general p ro cedure on
painting and the pai nt manufactu rer’s sp eci fication, the sam e
shall be immedi atel y b rou ght to the not ice of the Pu rchas er.
Generall y in cas es of such confli cts, manufactu rer’s
speci fications/ recom mendatio ns sh all prevail.
03.01.04
Befo re bu yin g t he p aint in b ulk, it is recommended to obt ai n
sample of paint and establish “Control Area o f Pai ntin g”. On
Control Area, su rface preparation and paintin g shall b e
carri ed out.
03.01.05
If required, sampl es of paint sh all b e t ested in lab oratori es
to establish qualit y of p aint with respect to:
(i)
Viscosit y
(ii)
Adhes hion/ Bond of paint in st eel surfaces
(iii) Adhes hion/Simulat ed salt sp ra y test.
(iv) Chemical an al ysis (p ercent age of solids b y wei ght)
(v)
Norm al wear resi stance as en cou ntered du rin g
handling & erection.
(vi) Resistance against exposure to aci d fum es, etc.
03.01.06
Whole quantit y o f paint for a parti cular s yst em of p aint sh all
be obt ained from th e same m anu factu rer.
03.01.07
The main Cont ract or shall b e res ponsible fo r suppl y of
paints and this resp onsibilit y shall not be p assed on to the
sub-contractor.
- 05 -
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
03.01.08
The p aintin g m aterial as deli vered t o the Contractor, must b e
in the manufacturer’s ori gin al cont ai ner bearing theron
manufact urer’s nam e brand and descri ption. Paint/Paintin g
materi al in contai ners without l ab els or with illegibl e lab els
shall be rejected , removed from th e area and shall not be
used.
03.01.09
Thinners wherev er used sh all be thos e recommen ded b y the
paint manufacturers and shall b e obt ained in cont ain ers with
manufact urer’s nam e and brand nam e of thinner legibl y
printed , failing whi ch the thinner is liabl e to be rej ect ed and
shall not be used.
03.01.10
All paint containers shall be clearl y l abel ed to sho w the
paint identifi cation , date o f manufact ure, bat ch number,
speci al inst ructi on, shel f life etc. Th e contain er shall b e
opened onl y at the ti me of use.
03.01.11
All paints sh all be
requi rem ents o f laid
manufact urer.
03.01.12
All ingredi ents i n a paint cont ainer s hall b e th orou ghl y
mix ed to break -up l umps and dispers e pigm ents before use
and during appli cati on to maint ain homo geneit y.
03.01.13
The proposed m ake, qualit y and sh ade o f the paint shall hav e
the approval of the client.
03.01.14
The colou r cod e o f the finishing paint t o be follo wed shall
be intim ated t o the success ful Tend erer aft er fin alisaiton of
order. The underco at shall have differen t tint to distinguish
the sam e from t he fi nishing coat.
03.01.15
The Cont ractor shall furnis h pai nt man ufacturer’s t est repo rt
or t echni cal data sheet pertainin g to t he paint sel ect ed. The
data sheet s hall i ndicat e amon g other thin gs th e rel evan t
standards, i f an y, composition in wei ght p ercent of
pigm ents, v ehi cles , additiv es, dr yin g tim e, vis co cit y,
spreadin g rat e, fl ash point, method o f ap plication, qualit y o f
surface preparatio n requi red, corrosion resist ance prop erties
and colou r shades av ailabl e.
03.01.16
For det ails o f p aint materi als refer Annex ure - 0 2
stored
down
- 06 -
in accordance with the
proced ure b y th e pai nt
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
03.02 General
03.02.01
Each coat of paint s hall be continuous, free o f pores an d of
even film thi ckn ess without thin s pots.
03.02.02
Each coat of pai nt shall
application of n ext coat.
03.02.03
Paint shall be applied at m anu facturer’s recommen ded rates.
The numb er of co ats shall be such that t he minimum dr y film
thickness sp eci fied is achiev ed. The d ry film thi ckness o f
painted surfaces sh all be checked wit h ELC OMETER of
measurin g gauges to ensure appli catio n of specifi ed DFT.
03.02.04
Zinc rich primer paints which have b een expos ed several
months before finis hing coat is applied shall be washed
down thorou ghl y to remove soluble zin c salt deposits.
03.02.05
The machine fini sh ed surfaces shall b e co ated with white
lead and tallow b efo re shipm ent or before bein g put out into
the op en air.
03.02.06
Areas which becom e inaccessibl e after assembl e sh all b e
painted before ass embl y (after obtaini n g p aintin g cl earance
from the inspecting authorit y) after requi site surface
cleanin g as sp eci fied.
03.02.07
Paint shall not be applied when the ambi ent temperat ure is 5
deg C and below or 45 deg C and ab ove. Also p aint sh all not
be appli ed in rain, wind, fog or at rel at ive humidit y of 80 %
and abov e u nless the m anu facturer’s recommen dation s
permit. Application s of pai nt sh all be onl y be sp ra yin g o r
brushing as per IS 486 – 198 3 an d IS 4 87 – 1985 .
03.02.08
Primer paint shall be applied not l ater t han 2 – 3 hours after
preparation of surface, unless specifi ed otherwise.
03.02.09
Edges, corners , crevices, d epressions, jo ints an d welds shall
receive speci al att en tion to ensu re th at t he y receiv e painti n g
coats of th e req uired thickness.
- 07 -
be
suffi cientl y
dry
before
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
03.02.10
Surfaces which can not be painted but require p rotection
shall be given a co at of rust in hibitive greas e accordin g t o
IS 958 – 1975 o r s olvent d eposited co mpound accordin g t o
IS 1153 – 1975 or IS 1674 – 1960.
03.02.11
Surfaces in co ntact durin g sho p assembl y sh all not be
painted. Surfaces which will be in acces sible aft er assem bl y
shall receiv e minimu m two coats of s pecified prim er.
03.02.12
Surfaces to be in co ntact with wood , bri ck o r ot her masonr y
shall be given on e s hop-coat of the specified p rimer.
03.02.13
For woo d surfaces t he p aint appli cation shall be as p er paint
manufact urer’s reco mmendation
03.03
Site/ Field Painting
03.03.01
Wherever shop pri mer pai nting is scrat ched , abrad ed o r
damaged, the su rface shall be tho rou ghl y cl eaned usin g
emer y p aper and power driven wire brush wh erever
warranted, and touched up with co rresponding prim er.
Touchin g up paint s hall be mat ched and blend ed to eliminat e
conspi cuous m arks.
03.03.02
If more than 50% o f the p ainted s urface of an item req uires
repair, the entire it em sh all b e m echanicall y cl eaned an d
new prim er coats sh all be ap plied followed b y int erm ediat e
and finishing coats as per painti ng sp eci fication.
03.03.03
All field welded areas on shop pai n ted items shall b e
mech anicall y cl ean ed (in cludin g the weld area proper,
adjacent areas cont aminat ed b y weld s patter o r fum es and
areas where existing p rimer pai nt is burnt) Subs equ entl y,
new primer and fini shing co ats of p aint shall be applied as
per paintin g specifi cation.
03.03.04
The first coat of finish p aint at sit e sh all be appli ed
preferabl e wit hin three m onths of the shop paint.
- 08 –
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
03.04
Structural
03.04.01
All fabricated steel structu re, fab ricat ed steel pipes , et c.
shall h av e a minim um of t wo coats of primer p aint before
dispatch to sit e.
03.04.02
Parts of st eel st ru ct ures emb edded in concrete shall be given
a prot ective coat o f portl and cement slurr y immediat el y
aft er fabrication and aft er surfaces o f thi s part is th oroughl y
cleaned from grease, rust, mill scales, etc. No paint shall be
applied on this part.
03.04.03
All stru ctu res shall receive ap propriat e numb er of p rimer
and finishing coats in order to achieve overall DFT as per
desi gn d rawings/specification.
03.05
Electrical Equipment
03.05.01
Small machiner y, motors, electri cal equipment
instrument s, et c. s hall be p ainted in th e s hop.
03.05.02
Large machiner y, l arge moto rs, cranes, conve yors, etc. shall
be shop pai nted as per the paintin g s ch eme.
03.06
Hot Surfaces
03.06.01
Total DFT for heat resist ant p aints s hou ld not ex ceed 10 0 –
120 microns, otherwise fl akin g occurs (as p er paint
manufact urer’s recommendations ).
03.06.02
Heat resistant paints should b e applied by b rush.
03.06.03
Primer co at is not necess ar y for t he surfaces
temperatu re con ditio n more that 120 d eg C.
- 09 -
an d
having
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
04
PAINTING SCHEMES
For a compl ete p ain ting s chem e of an y item bein g print ed,
all t ypes of p aints are to be pro cured from the sam e
manufact urer as app roved b y th e pu rchas er.
04.02
Legend
SP 2P1 1 I1 2F1 DFT CRT -
Surface preparation qualit y as p er S IS st andard
Two (2) coats of Pri mer p aint t ype P1
One (1) coats o f Int ermedi ate paint t ype I1
Two (2) coats of Finish paint t ype F1
Dr y Film Thi ckn ess in micro ns d eveloped
Clean and R etouch
Typ e of p aint produ cts like P1 to P9, I1 to I4 and F1 to F10
have been s pecifi ed under Annex ure-02.
04.03
The painting s ch eme to be foll owed for various
structure/ equipm ent ex posed to different conditio n is briefl y
given in Ann ex ure-0 3 for guid ance to t he tenderer.
- 10 -
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
GUARANTEE
05.01
The Contract or shall guarant ee th at the ph ysical and
chemi cal prop erti es of the pai nt materials conforms with th e
speci fication o f p aint produ cts.
05.02
The Contractor sh al l submit int ernal t es t reports from paint
manufact urers regarding the qu alit y o f p aint when ev er asked
b y t he Pu rchas er/Co nsultant.
05.03
Guarant ee period shall comm en ce from th e dat e of
completio n of finishing co at o f pai nt. The guarant ee p eri od
will be indi cat ed depending on th e t ype of su rface
preparation and s ys t em o f paintin g. To fulfill this
obligations the Co ntractor ma y obt ain from the p aintin g
manufact urer, gu arantee for th e perfo rm ance of paint/p ainted
surfaces.
- 11 -
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
Annexure-01
Surface Preparation Grade
Sl.
No.
1
Surface Preparation
Sa 2.5
Sa 2
Sa 2
Sa 1
Sa 1
St 3
St 3
St 2
St 2
Power tool cleaning:
Very thorough scrapping and wire brushing to
remove loose mill-scale, rust and foreign
matters to have pronounced metallic shine.
6
Sa 2.5
Brush-off blast cleaning:
Removal of all loose mill-scales, rust and
foreign matters etc.
5
Sa 3
Blast cleaning to commercial quality:
At least 2/3 of any section of the surface area is
free from all rusts, mill-scales and visible
residues.
4
Sa 3
Blast cleaning to near white metal:
95% of any section of surface area is free from
all rusts, mill-scales and visible residues.
3
DIN Std. Din
55928 (Part 4)
Blast cleaning to white metal
Removal of all visible rusts, mill-scales, paint
and foreign matters.
2
Swedish Std
SIS 055900
Hand tool cleaning:
Removal by hand brushing of loose mill-scale,
loose rust and foreign matters.
- 01 -
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
Annexure - 02
PAINT MATERI AL S
01.
PRIME R PAI NTS (P)
Primer p aint produ ct s shall b e applied o nl y on dr y and cl ean
surfaces.
01.01
Pri mer Paint – P1 (Ph enolic – Alkyd B ased)
A singl e pack air dr yin g phenoli c
composition with zinc phosphate as
conforming generall y to IS : 2 074.
Air drying time
modified alk yd
a primer p aint
- About 60 minutes (touch dry)
- Overnight (hard dry)
01.02
Dry film thickness (DFT)/Coat
- 40 microns (min)
Temperature resistance
- Upto 1000C dry heat
Primer Paint – P2 (Chlororubber Based)
A singl e p ack air dryi n g hi gh build chlorinat ed rubb er bas ed
zinc phosph ate prim er.
Percent chlororubber
- 20 to 22 (% Chlorine above 65%
in chlororubber)
Air drying time
- About 15 minutes (touch dry)
- Overnight (hard dry)
DFT/ Coat
- 50 microns (min)
Temperature resistance
- Up to 650 C dry heat
.
- 01 -
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
01.03
01.04
Primer Paint – P3 (PVC Copolymer Alkyd Based)
Polyvinyl chloride (PVC)
- Alkyd zinc phosphate – redoxide
based primer
Ratio
: PVC copolymer + alkyd resin
(1:1)
Pigments
: Zinc phosphate & Fillers
Air drying time
- 24 hours
DFT/Coat
- 80 microns
Temperature resistance
- Upto 800C dry heat
Primer Paint – P4 (Epoxy Based)
A two pack ai r dryi n g Epox y pol yam ide resin b as ed red
ox ide-zinc pho sphat e prim er.
Epoxy content (% wt.)
- 15 to 18
Air drying time
- About 30 minutes (touch dry)
- overnight (hard dry)
DFT/Coat
- 30 microns (min)
Temperature resistance
- Upto 1200C dry heat
- 02 –
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
01.05
Primer Paint – P5 (Epoxy Based)
A two pack ai r dr yi ng Epox y pol yamide with zinc dust of at
least 92% zinc dust on the dr y film
01.06
Epoxy content (% wt.)
- 8 to 10
Air drying time
- Less than 10 minutes (touch dry)
- Less than 2 hours (hard dry)
DFT/Coat
- 40 microns (min)
Temperature resistance
- Upto 3000C dry heat
Primer Paint – P6 (Poly – Vinyl Butyral Resin Based)
A two pack air dr ying pol yvin yl but yr al resin b as ed wash
primer with rust in hibitive pi gm ents.
01.07
Air drying time
- 5 to 7 minutes (touch dry)
- 2 hours (hard dry)
DFT/Coat
- 8 microns
Temperature resistance
- Upto 650C dry heat
Application for
- Galvanised iron, aluminium,
light alloys etc. on which the
adhesion of conventional paints
are poor.
Primer Paint – P7 (Ethyl Zinc Silicate, EZS Based).
A two pack heav y d ut y zinc dust ri ch si licat e prim er which
protects the surface with just a sin gl e coat.
Total solids (3 wt)
Densit y ( g / cc )
Air drying time
DFT / coat
Temperature resistance
- 03 -
-
84 +/- 2
3.07 +/- 0.05
To top coat 16 hours
60 microns
Upto 450 deg C dry heat
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
01.08
Primer Paint – P8 (High Build Coal Tar Epoxy)
A two pack cold cured H.B. epoxy coal tar coating – no
primer is required.
01.09
Mixing ratio
Air drying time
-
DFT / Coat
-
Base: Hardener (4:1by vol.)
48 hours (hard dry)
Full cure 7 days
100 microns
Wood Varnish-P9
Treated oil based primer pigmented with suitable pigments :
Air drying time
-
16 hours for application of
top coat.
Coverage
-
10 to 14 sq. m/litre
- 04 -
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
02.
INTERMEDIATE PAINTS (I)
These paints shall be applied over primer coats as an
intermediate layer to provide weather proof seal of primer
coats.
02.01
Intermediate Paint-II ( Phenolic alkyd based)
A single pack high build phenolic based paint with micaceous
iron oxide (M10) .
Air Drying Time
DFT /Coat
Temperature resistance
Compatible with
02.02
-
4 to 6hours (touch dry)
2 days (hard dry)
75 microns (min)
Upto 100 deg C dry heat
Primer P1
Intermediate Paint-I2 (Chlororubber based)
A single pack air drying high build chloro based paint with
MIO.
Air Drying Time
DFT/Coat
Temperature resistance
Compatible with
02.03
-
15 minutes (touch dry)
24 hours (hard dry)
70 microns (min)
Upto 65 deg C dry heat
Primer P2,P3 & P4
Intermediate Paint-I3 (PVC – Alkyd Based)
PVC Coplo ymer
Pigments
-
DFT/Coat
Temperature resistance
Compatible with
-
Resin 1 : 1
Micaceous iron oxide
(M IO)
80 microns (min)
Upto 80 deg C dry heat
Primer P2 & P3
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
- 05 02.04
Intermediate paint-I4
A two pack air drying high build epox y resin based paint with
MIO.
Air drying time
DFT / coat
Temperature resistance
Compatible with
-
6 to 8 hours (touch dry)
7 days (full cure)
100 microns
Up to 180 0 C dry heat
Primer P4 & P5
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
-
06
-
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
03.
FI NISH PAI NTS (F)
Finish p aint costs shall be applied over prim er co ats and
interm ediat e coats aft er p rop er cl eani ng and tou ch up o f
primed surface.
03.01
Finish Pain t – F1
A singl e pack air dryi n g hi gh gloss ph enolic alk yd modi fied
s ynt heti c en am el pai nt suitabl y pi gment ed.
Air drying time
- 3 to 4 hours (touch dry)
- 24 hours (hard dry)
DFT/Coat
- 25 microns (min)
Temperature resistance
- Upto 1000C dry heat
Compatible with
- Primer P1
Intermediate I1
- Generally all shades
Colour
03.02
Finish Paint – F2
A singl e pack air dryi n g pol yu reth an e enamel of hi gh gloss
and hard finish suitabl y pi gment ed.
Air drying time
- 2 to 2 ½ hours (touch dry)
- 6 hours (hard dry)
DFT/Coat
- 30 microns (min)
Temperature resistance
- Upto 1000C dry heat
Compatible with
- Primer P1 & P8 and
Intermediate I1
- Generally all shades
Colour
-
07
-
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
03.03
Finish Paint – F3
A two pack ai r d r yin g bituminous alumin um paint.
03.04
Air drying time
- 1 to 2 hours (touch dry)
- 21 hours (hard dry)
DFT/Coat
- 25 microns (min)
Temperature resistance
- Upto 1000C dry heat
Compatible with
- Primer P1 and Intermediate I1
Colour
- Bright metallic
Finish Paint – F4
A read y mixed oil-alk yd b ased s yn thet ic en amel p aint of
high gloss and hard wearing properti es.
-
Air drying time
- 6 to 8 hours
Coverage
-
Temperature resistance
- Upto 600C dry heat
Compatible with
- P8
Colour
- Generally all shades
08
14 to 16 Sq. m /litre
-
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
03.05
Finish Paint – F5
A singl e pack air drying pl asticized chlororubber pain t
suitabl y pi gm ent ed.
Air drying time
- 30 minutes (touch dry)
- 24 hours (hard dry)
DFT/Coat
- 35 microns (min)
Temperature resistance
- Upto 650C dry heat
Compatible with
- Primer P2 & P3,
Intermediate I2 & I3
- Nearly all shades except few.
Colour
03.06
Finish Paint – F6
A PVC – Cop ol ymer alk yd bas ed enam el.
Density
- 1.17 + 0.05
Total solids (1 wt)
- 55 + 2
DFT/Coat
- 40 microns
Compatible with
- P2 and P3
- 09 -
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
03.07
Finish Paint – F7
A two pack air dryi ng ep ox y pol yam ide enam el suit abl y
pigm ented.
03.08
Air drying time
- 2 to 3 hours (touch dry)
- 7 days (full cure)
DFT/Coat
- 40 microns (min)
Temperature resistance
- Up to 1300C dry heat
Compatible with
- Primer P4 & P5,
Intermediate I4
Colour
- Generally all shades.
Finish Paint – F8
A sin gle pack s yn thetic rub ber based alu minium paint.
Air drying time
- 2 hours (touch dry)
- 24 hours (hard dry)
DFT/Coat
- 25 microns (min)
Temperature resistance
- Upto 2000C dry heat
Compatible with
- No Primer paint except primer
P6 is applicable in case of nonferrous substrate.
Colour
- Smooth aluminium.
- 10 -
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
Annexure-03
PAINTING SCHEME
Sl.
No.
1.0
1.1
Description
Painting Scheme
At Shop
At Site
Steel Structures
(Temp. not exceeding 800C)
Technological steel structures for plant
and equipment
Indoor
Outdoor
1.2
CRT
2F1
130
SP – Sa 2.5
2P1
1I1
CRT
2F1
205
SP – St-2 and /
or St-3
2P1
CRT
SP – St-2 and /
or St-3
2P1
CRT
SP- St2 and/
or St-3
2P1
1I1
CRT
SP – St-2 and /
or St-3
2P1
1I1
CRT
2F1
130
Walkways, stairs, platforms etc. which are
of wearing surface
- Indoor
- Outdoor
1.4
SP – Sa 2.5
2P1
Fabricated steel structures at site for rung
ladders, cat-ladders, gates, rolling
shutters, etc. (Springs/rubbing surfaces
excluded)
- Indoor / Outdoor
1.3
Total
DFT
(Refer
Note-1)
2F1
2F1
130
205
Steel doors and windows
- Indoor / outdoor
- 01-
2F2
215
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
Sl.
No.
2.0
2.1
Painting Scheme
At Shop
At Site
Description
Total
DFT
MECHANICAL EQUIPMENT
Mechanical equipment
(Temp. not exceeding 800C)
2.1.1 Static equipment like storage tanks,
vessels, bins, bunkers, heat exchangers,
coolers, cyclones, scrubbers, etc.
- Indoor
SP – Sa 2.5
2P2/2P3
- Outdoor
CRT
2F5/2F6
170/240
SP – Sa 2.5
CRT
2P2/2P3+1I2/1I3 2F5/2F6
240/320
SP – Sa 2.5
2P3/2P4
CRT
2F6/2F7
240/140
SP-Sa 2.5
2P3 + 1I3/1I4
CRT
2F6/2F7
320/340
2.1.2 Rotary/moving
equipment
and
machineries like crushers, mills,
vibratory screens, bin activators,
blowers, fan, air/gas compressors,
pumps, gear boxes, machine housings
etc.
- Indoor
- Outdoor
- 02 -
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
Sl.
No.
3.0
3.1
3.2
Description
Painting Scheme
At Shop
At Site
ELECTRICAL EQUIPMENT
(Temperature upto 80 deg c )
Electric drives below 10 kw rating
-- indoor / outdoor
Electric drives above
10 kw rating
- Indoor
- Outdoor
3.3
Total
DFT
Stove
Enamelling
CRT
110
SP – Sa 2.5
2P4
CRT
2F7/2F2
140/120
SP – Sa 2.5
2P4 + 1I4
CRT
2F7/2F2
240/220
Stove
Enamelling
CRT
110
SP-Sa 2.5
2P4
CRT
2F7/2F2
140/130
SP – Sa2.5
2P4 + 1I4
CRT
2F7/2F2
240/230
SP – St2 and /
or St3
2P2
CRT
Transformer/Rectoformers
3.3.1 Small units
- Indoor / outdoor
3.3.2 Large Units (air / oil cooled)
- Indoor
- Outdoor
3.4
Switch Gears, Structures
-Indoor / outdoor
(if not galvanized)
- 03 -
2F5
170
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
Sl.
No.
3.5
Description
Motor control centres cubicles
3.6
Cable vaults, cable trays, etc.
Painting Scheme
At Shop
At Site
Stove
CRT
enamelling
SP –St2 and /
CRT
or St3
Total
DFT
110
2P1
2F1
To be hot-dip CRT
galvanised
with P5
130
120
3.7
Electric transmission towers
4.0
Instrumentation and Controls
(Temperature up to 800C)
4.1
All field mounted instrument & control Stove
valves and fixtures
enamelling
CRT
4.2
Control panel, desks etc.
SP –St2 and /
or St3
CRT
2P1
2F1
SP – St2 and
or St3
2P1
SP – St2 and /
or St3
2P1 + 1I1
CRT
SP- St2 and/
or St3
Remove
paint
and
insulate
5.0
Pipe / Duct work
(Overground)
5.1
Non – insulated
(temperature up to 800C)
- Indoor
- Outdoor
5.2
1P1
130
2F1
CRT
130
2F1
205
Insulated (hot)
- Indoor/Outdoor
110
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
Sl.
No.
6.0
6.1
6.2
Painting Scheme
At Shop
At Site
Description
Total
DFT
Oxygen Plant
Outdoor steel
structures
Rotary equipment like air compressors
SP – St2 and /
or St3
CRT
2P1 + 1I1
2F3
205
Sa 2.5
2P4
CRT
2F7
140
7.0
Others
7.1
Standard mobile equipment like chasis of As per manufacturer’s standards
trucks,
dumpers,
crawler
cranes
bulldozers, railway rakes, chasis of slag
cars, ladle cars, etc.
7.2
Laboratory equipment like ovens, Stove
screens, magnetic stirrers, samplers, etc. enamelling
CRT
110
7.3
Wood works
SP
2P9
CRT
2F4
-
7.4
Steel structures partly immersed in water
SP – Sa 2.5
CRT
2P8
-
05
200
-
NEELACHAL ISPAT NIGAM LIMITED
IRON AND STEEL PLANT
DUBURI, ORISSA
Notes: 1.
Paintin g scheme of all fab ricated steel structures , fabri cat ed pipe
work, buildi ng stru cture, con ve yo r gall eri es, pipe trestles etc. is
indicat ed in the Technical Specifi cation of steel st ructu res.
2.
Primer P aint
Primer coat shall be suitable for intended temperat ure ap plications
as per manufact urer’s recommendatio n. The prim er sel ectio n shall
be gen erall y in line with th e sp eci fication laid down in Ann ex ure02.
3.
Finish P aint
In cas e of Aluminium clad din g fi nal p ai nting will not be req uired.
- 06 -