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timely dissemination of this information in an accurate manner to the public.
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ह
ै
”
ह”ह
IS 4736 (1986): Hot-dip Zinc Coatings on Mild Steel Tubes
[MTD 7: Light Metals and their Alloys]
Gr
1
IS : 4736 • 1986
( R
••
mrmed
1.
)
Indian
Standard
SPECIFICA~rION
FOR
HOT-DIP ZINC COATINGS ON
MILD STEEL TUBES
( First Revision )
Third Repnnt AUGl JSl
20()
1
UDC
669.586.5:
669.141.24~462
e Copyrighi
1987
BUREAll
OF
INDIAN
STANDARDS
MANAK
BHAVAN,
9 BAHADlJR SHAH
ZAFAR
MARG
NEW DELHI 1100gZ
March
1987
AMENDMENT
NO.1
MAY
1989
TO
IS
:
4736
-
1986
SPECIFICATION FOR HOT-DIP
ZINC COATINGS ON MILD STEEL TUBES
(
First
Revision
)
(
Page
4,
Note
under
clause
S.1
) - Substitute tbe following for the
existing
note:
'Non
-
Mall
of
zine
coatiol
ahall
Dol
be lesl than 400
Ilm
l
as determined
from
the
averase result
of
two specimens taken
(rom
opposite
end.
of
tube
selected for lesriol_ The lower
of
the two values shall
not
be
Ie..
tbaD
360
I/m
t
. '
( SMDC
28)
Reprography
Unit,
815,
New
Delbi,
India
AMENDMENT NO. % JANUARY
2001
TO
IS
473':
1'"
SPECIFICATION
FOR
HOT·DIP
ZINC
COATINGS
ON
MILD
STEEL
TUBES
(
Fint
R.,ultm
)
(Pale 4,clauu
J.l
) -
Sublijaule
tbe(ollowina (or
abe
existing:
'3.1
QuaUty
0'
Zinc
..-
7Jac
uled
for
plvlnizJna Iblll
contorm
10
any
of the
pIdea
tpedfled
tiiS
209:
1992
ZJIIC
iJllOl
(fourth revision) or IS
13229
:
1991
Zinc
(orplYanJzjllJ.'
(MTD20)
Rqropplly
Vlte,
815,
N~
Delhi.
Jldi,
AMENDMENT NO. 3 MAY 2002
TO
IS 4736: 1986 SPECIFICATION FOR HOT-DIP ZINC
COATINGS ON MILD
STEEL
TUBES
(
First
Revision )
( Amendment No
I)
- Withdrawn
(
Page
4, clause 5.1 ) - Substitute the followmg for the exisung
'S.1 Mass
of
Zinc Coating - For tubes With thickness up to 6 mrn, the
minimum mass of zinc coating, when determined on a 100
mm
long test piece
( see
6.2)
10 accordance
With
IS 6745 1972+shall be 360 glm
2
NOTE- Mass of
7JnC
coaung shall not be less than 360
11m2
when testedon twospecimens
taken from oppositeends of the tube selected for tesung
( Page 5, clause 5.4 ) - Substitutethe followmg for theexisung
'5.4 Uniformity
of
Galvanized Coating - The galvanized coating when
determined on a 100 rom long test piece (see 6.2) In accordance With IS 2633
1966*
shall Withstand 5 one minutedips '
(MTD
24)
AMENDMENT
NO.4
NOVEMBER 2007
TO
IS
4736:
1986 SPECIFICATION
FOR
HOT-DIP ZINC
COATINGS ON
MILD
STEEL
TUBES
(
first
Revision
)
(Page 3, clause 1.1) - Delete 'covered in IS 1239: (Part
1)-1979t
and
IS:
1161-1979t'.
[Page
4, clause 5.1, first line (see also Amendment No.3)] - Substitute
'tubes of
any
thickness' for 'tubes with thicknessup to 6 mm'.
(MTD24)
Reprography
Unit,
SIS,New
Delhi.
India
IS z 4736 • 1986
Indian
Standard
SPECIFICATION
FOR
HOT-DIP ZINC
eOA
TINGS
ON
MILD
STEEL
TUBES
(
First
Revision)
riot
Dip
Sprayed
arid Diffusion
Co.uings
Sor
tional
Committee,
S~1L)(~
28
Chairman
" u u 1 V. R
Sr
14
n \
~I
\!"f t
"N
I?tprt
JtrltlTlg
Indian
liot
Dip
Galvanizers'
Association.
!\ew
IJelhi
Jle'llb,rs
~JlH
l V. I",
'\(,a
'\V
\ L
Hindustan
Alurmrnum
Corporation
I
..
td,
Renuko
ot
SHf, 1 N.
C;.
')tt
\HM
J\ ( Alternau )
~
It
HI}),
K.
n
\NFH
J t
1~
:'-:at
iona
l
Thermal
})uwer
Corporation
Ltd,
New
Delhi
~tlHl
r N.
nit
vr
: \(
HAItYYA
Nat
iona
l
'fest
House,
Calcutta
';HHl
~t.
Y.
l~f)H}\'E'l
Ministry
of
Defence \
DGI
), New Delhi
~.HI{
I A. llH \ I'J
\(
Ji
\RYA
( Alternate )
I)u
\.
(';lfAJ\H
\HqH1Y
Usha
~lartin
Industries
Ltd,
Ranchi
(
Bihar
)
Cur
~t
J
~1
&
~1l:
1 \ I, Ll'PHO
1ST
M inistry
of
Ra
tlways
A"'HII:i~rAST
Ctfl)((S1
&
~r~;TALl)t'nO]~T
~
Alternate )
(~RJEP~
r:NO
[~J
}<:It (
Tn
\
NS
)
Gujarat
Elecrricit
>;
Board, V
-aJodara
I':
-c
(4•.( t11'1V
~
I·:,
G TS E L 1\ ( Alt
er
1Z
ate )
SURf].
C
r:ltR'"
Steel
Authorir v
of
India
Ltd
( Bokaro
Steel
Plant
),
Borkaro
Stc('1c«Y
~Hltl
G.
GA'l'F;SlfAN
Karnam
Lngineermg
Corporation I
..
td,
Bombay
SKRI
B. G.
SOJrnNJ
( Alternats )
Sn
nt
BRtJLAL
KIJASTRIVA
Steel
Authority
of
India
Ltd
(Rourkela
Steel
Plant),
Rourkela
SHRI
J.
N.
BU"MBRV
( Alternat« )
Smu
M.
M, L.
KJiULLAJ~
The
Tmplare
Co of
India
Ltd,
Golmuri,
jamshedpur
SJIHI
P.
K.
BANERJEE
( Alternau )
Sur«
R"AfCSB
CHANDRA
The
Indian
Steel
and
Wire
Products
Ltd,
MAR4a.TAN
jamlhedpur
SHRr
DARSHAN
SINon
( Alt'''JD/' )
DR
M. D.
MA
R,ltSHW
ARI
'l'he
Indian
Tube
Co
Ltd,
jamshedpur
SHRI
K. R.
NATAI1A.JAN
( Alurnate ;
( Conlinu,d
on
full' 2 )
@ CtI/lYntht )
987
BUREAU
OF
INDIAN
STANDARDS
This
publication
is
protected
under
the
Jilt/as,.
Copyra,ht
A&I
(XIV
of
1957)
and
reproduction in whole or in
part
by
Rny
means
except
with
wruren
permission
of
the
publisber
.ball
be deemed to be aD
infrinlflment
of
copyright
und~r
the
laid
Act.
IS
s 4736 • 1986
(
Continued
from pagl 1 )
Rtp"s,nt,ng
Directorate
General
of
Technical
Development,
New
!)elhl
Indian
Posts &
Telegraphs
Department:
Ca
lcuu
i
rI he 1
ara
1
ron
&
Steel
ce l
..
td, J
arnshedpur
J\I
ember
s
SHU1"
I\IAfIMn,n,
Sum
1). r; !\1l
~HFlt.JFE
f)R
I
Mtu
m
n.i
i r
"Ii
H.T 1\
r~
~
I
'0
Ii
( Alternate )
SH R 1
~
N(i
~~
I ,\
J~
A 1\ 1 -\
~
IlH
A R
"-1
~K
~
H ( Alurnate )
"iJIHI
D P \ l I
Guest,
Keen,
Wrl
lia ms J id
('dlclltta
Sn
nr
I.J
PUf.A/HA'l'fJl'
Lnd
ran
Lead,
line
Infornldtlon
C~t.lltre~
NlW
Dr-lln
SHIt
1 S N '"1
~
(. H I
~1
C
"t
ef\
)
a)
J
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t d J (.4a
It
u t tel
SHRI
PINAhl
GUO';!l
( Alurnat« )
Snur
N
K.
~INOHAl..
I he
Indian
Iron
and
Stee 1 Co
Ltd,
Burnpur
Snn
r
l\.
~RNOtJPTA
( Alurnat« )
SHltl
J.
I~
S()NJ4 JI
Special
~tpel
Limned,
Bornba
v
Suar
M.){
D()eTOIt
( Alternate )
SIlK]
K.
RAOHAVJ
NDRJ\N,
DIrector
Genr-ral ,
I~I
(
Ex-o,fficJO
M,",O")
Director
(
Str
uc &
Met
)
/;,crltary
SHill
S K.
GUPfA
Deputy
11Jrector (
M~taJI
),
lSI
Hot
Dip
Galvanizing
Subcommittee,
SM
DC 28 : I
EMC
Steelal
l
...
td,
Calcutta
Indian
Hot
Dip
Galvamzers'
ASSOCIatIon,
New
Dellu
The
Indian
J'ube Co
I~td,
Jamshfldpur
The
Fort
WillIam
Co
Ltd,
Calcutta
Hyde)
Designs
Directorate,
Ch.indrgarh
Hope's
Mera
l
Windows
(
Indra
)
Ltd,
Calcutta
ConV'lltr
SHIll
V. R.
SUllRAMANIAV
M"nb,TS
SHRI
J..,
PL(IAZII~"NTHY
( Alumat«
to
~hrl
V.
R.
Subr
arnaruan
)
SHRI
V. P.
ANAND
SURI
S. N_
SINO
1i ( Altemat« )
SURI
B. D.
BALI
SSRI.J.
S.
BEDI
SHRt
A.
K.
Sf.BTI
( Alt,rraal,)
IJIRECTOR
r t R
ANSMI'"4S10N
)
Central
Elecrrrcity
Authority,
New
Deihl
DEPUTY
OJUlt<./IOR
(
TRAN!I-
~t
l\jSlf)N
) ( Alurna!« )
SnTtJ
D.
Dtn
TA
SHRIA.K.GUH-\
StiRl
S.
KUIIAR
( Alt,rnIJI, )
JOINT
DIRECTOH
(
CJfl-M
)
MInistry
of
Railways
JOIN
J
DIRI!:(flOR
(
II
) · I (
Alt,rnate)
SRBI
VIJAV
KAPOOR
Guest,
Keen,
WIlliam!
Ltd,
Howrah
SURJ
R.
(~
M\JIAJAN
The
Indian
Steel &
Wire
Products
Ltd,
Jamshedpur
SaRI
AVTAR
SINOl(
(
Alternat«
)
SURI
B.
MAHAPATRA
Steel
Authority
of
India
Ltd
{Rourkela
Steel
Plant),
Rourkela
SsBI
S. N.
SINJIA
(
All',,,.,,
)
(
Co",."wd
011
/HIt'
6-)
2
IS I 4736 • 1986
Indian
Standard
SPECIFICATION
FOR
HOT-DIP ZINC
COATINGS
ON
MILD
STEEL
TUBES
(
First
Revision)
o.
FOR
E W 0 R D
0.1
This
Indian
Standard
( First
Revision)
was
adopted
by
the
Indian
Standards
Institution
on
28
August
1986,
after
the
draft
finalized by
the
Hot
Dip
Sprayed
and
Diffusion
Coatings
Sectional
Committee
had
been
approved
by
the
Structural
and
Metals
Division
Council.
0.2
The
hot-dip galvanizing
f)fOCeSS
is very
widely
used
for
obtaining
protection
against
corrosion
of
a
large
variety
of
ferrous
products.
This
standard
has
been
formulated
with
a
view
to
achieving
efficient
and
economic
protection
of
steel
tube
by
a
hot
..
dip
galvanized
coating
of
adequate
and
uniform
thickness.
0.3 This
standard
was first published in
1968.
III
this revision, tile
requirement
of
the
quality
of
zinc
for
the
purpose
of
gal
vanizing
has
been
modified
and
also
the
purity
of
zinc
in
the
galvanizing
bath
hal
been
specified
to
ensure
the
better
quality
of
zinc
coatings.
Reference
has
also
been
made
for
the
guidance
of
manufacturer
and
purchaser
for
rejection/acceptance
of
the
galvanizing
defects,
in 5.2.
0.4
For
the
purpose
of
deciding
whether
a
particular
requirement
of
this
standard
is
complied
with,
the
final value,
observed
or
calculated,
expressing
the
result
of
a test
or
analysis,
shall
be
rounded
off
in
accord-
ance
with
IS
: 2-1960*.
The
number
of
significant
places
retained
in
the
rounded
off
value
should
be
the
same
as
that
of
the
specified
value
in this
standard.
I. SCOPE
1.1 This
standard
covers
the
requirements
for zinc coating
applied
by
hot-dip
galvanizing
on
mild
steel tulles
covered
in
IS : 1239 (
Part
1 )-
1979t
and
IS
:
1161
..
1979:.
·Rules
for
rounding
off
numerical
values
(
rev;sld
).
tMilcl
steel tubes,
tubulars
and
other
wrought
steel fittings:
Part
1
Mild
steel tubes
(fourth "vision ).
:Steel
tube.
for
structural
purposes ( third"visi,,, ).
3
IS I
~736
• 1986
2. SUPPLY
OF
MATERIAL
2.1
General
requirements
relating
to
the
supply
of
material shall conform
toIS:
1387·1967*.
3.
GENERAL
REQ,UIREMENTS
3.1
Q,aality
of
Ziac
....
Zinc
containing
at
least 98'5 percent by mass
should be used for the
purpose
of
galvanizing, or the molten
metal
in
galvanizing
bath
shall
contain
not
less
than
98'5
percent
by mass
of
zinc.
3.2
GalvaDlzlul
-
The
steel
tubes
may,
al
far
as
practicable,
be
galvanized in
accordance
with IS : 2629·1985t.
4. MANUF
ACTURE
4.1 B
••
I.
Metal
for
Tube.
- Unless specified at
the
time
of
ordering,
tubes shall be manufactured from mild steel
and
shall satisfy the condi-
tions
laid
down
in
the
relevant
standards
for tubes.
Some
alloy steels
and
carbon
steels
other
than
mild
steel
may
present special difficulties in
galvanizing.
In
such
cases,
the
standard
shall be
applicable
only
after
agreement
between
the
galvanizer
and
the
purchaser.
S.
COATING
REQ,UIREMENTS
5.1 M
•••
of
Zlac
Coatlal
- For tubes
with
thickness up to 6 mm,
the
minimum
mass
of
zinc
coating,
when
determined
on a 100
mm
long test
piece
(SII
6.2
) in
accordance
with
IS
: 6745
..
1972:,
shall
be
400 g/m
2
•
NOTS-
The
mag
of zinc
co.tinlsh.IJ
be not JelS than 400 g/m'
IS
determined
from
the
average relult of two .pecimew
taken
from appo.ite end. of tube selected
for telting.
5.1.1
The
mu~
of
coating expressed in
grams
per square metre shall
be
calculated
by
dividing
the
total
mass
of
zinc
( inside plus
outside)
by the total
area
(
inside
plus outside)
of
the
coated
eurface.
5.2 FreedolD frOID
Defect.
--
The
zinc
coating
shall be reasonably
smooth
and
free from such imperfections as flux, ash
and
dross .inclu-
sions,
bare
patches,
black
spots,
pimples,
lumpiness,
runs,
rust
stains,
bulky white deposits
and
blisters.
Guidance
for
rejection/acceptance
of
these defects have been prescribed in Appendix A of IS : 2629-1985t.
5.2.1
Small
black
spot.
may
be
repaired
..
prescribed
in Appendix A
of
IS
: 2629-1985t·
5.2.2 Unless a pasaivation
treatment
i.
specified,
lome
white
rust
may
be
found
on
the
tubes.
Guidance
for rejection/acceptance
has
been
prescribed
in
Appendix
A of
IS
:
2629-1985t
•
• General requirementa for
the
Iupply
of
metallurgical materials (firs'
"visUm
).
fRecommended practice (or hot-dip
pJvanizjDI
of iron aDd ateel tfir,''''';S;D"
).
J
Methods for determiDation
of
mau
of
liDe
coating OD zinc coated iron
and
It
••
l
artl
eI.
4-
IS
: 4736 • 1986
5.3
Free
Bore
Te.t
-
If
required
hy
the
purchaser,
a
rod
230
mm
long
and
of
appropriate
diameter
as
given
below
shall be
passed
through
relevant
nominal
bores
of
the
sample
tubes
to
ensure
a free
bore:
Nominal
Bore
of
Tube
Diameter
of Rod
to
be
Used
Afttr
Galuanirins.
rom
mm
8 4
10 6
15
11
20 16
25
21
5.4
UaiCorDlity
of
Galvanized
Coating
-
The
galvanized coating
when
determined
on
a 100
mm
long test piece
(sel
6.2)
in
accordance
with
I~
: 2633-1986-,
shall
withstand 4
one-minute
dips.
5.5
AdhesioD
Te.t
-
Galvanized
tubes
up
to
and
including 50
rom
nominal
bore,
when
bent cold
through
~}OD
round
grooved
former
having
radius
at
the
bottom.
of
the
groove
equal
to 8
times
its
outside
diameter,
shall
not
develop
any
crack
in
the
coating.
5.5.1
The
adherence
of
zinc
coating
on
tubes
above
50
mm
nominal
bore.
shall
be
determmed
l)y
the
pivoted
hammer
test
given
in
IS :
2629-
1985t.
6.
SAMPLING
AND
PREPARATION
OF
TEST
SPECIMBN
6.1
TIle
sampling
shall
be
as
given
below:
Nominal
Bore
Sample
Siz»
Up
to
25
mrn
1
tube!
1
000
tubes
or
part
thereof
Above 25
01111 1 tube/500
tubes
or
part
thereof
6.2
Test
specimens
shall
be
cut
approximately
100 mrn
in
length
from
opposite
ends
of
the
lengths
of
tu
be
selected
for
testing.
Before
cutting
the
rest
specimen,
50
111m
from
both
ends
of
the
sample
shall
be
discarded.
7.
RETEST
7.1
Should
any
of
the
test
pieces
fail
to
pass
the
requirements
of
this
standard
(set
5),
two
further
samples,
from
tile same
batch,
shall
be
selected for
testing.
Should
the
test
pieces
from
both
these
additional
samples pass,
the
batch
represented
by
the
test
samples
shall
be
deemed
to
comply
with
the
standard.
Should
the
test
pieces
from
either
of
these
additional
samples
fail,
the
batch
represented
by
the
test
samples
shall
be
deemed
not
to
comply
with
this
standard.
-Method
for testing
uniformity
of coating on zinc
coated
articles (slcond "vision ).
tRecommended
practice for hot-dip galvanlzing
of
iron
and
steel (fi'Jt
,evislon
).
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SRRI
S.
MAJUMDAR
IS I
4736
•
1'86
(
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from
/141'
2 )
RIJYf,s'n'in,
Directorate
General
of
Technical
Development,
New
Delhi
DBVBLoPMENT
OFFICER
( l-IME ) ( Altnndt, )
SURI
M. S.
MEHTA
General
Engineering
WorkJ,
Bharatpur,
Rajasthan
SJIRI
P. G.
MUKBBRJEE
Posts
&.
Telegraphs
Department.
Calcutta
SURI
K.
MITRA
(
Alternat«
)
DR
T.
MlIKHERJJtZ
Tata
Iron
& Steel Co
Ltd,Jamshedpur
SHRI
S.
NEELAEANTAN
Zenith
Steel Pipes
Ltd,
Bombay
SURT
B. A.
DESAI
( Alt"nGt, )
SHRI
N. D.
PARIKH
Kamani
Engineering
Corporation
Ltd,
Bombay
SHRI
A.
S.NQUPTA
The
Indian
Iron
& Steel Co
Ltd,
Burnpur
StlRJ
J.
L.
SONEJf
Special Steel
Ltd,
Bombay
SHBI
M. R.
DoCTOB
( AU,rna" )
SURI
K.
M.
TANJCJA.
Directorate
General
of
Supplies
and
Disposal.)
New
Delhi
SURI
G. P.
GUPTA
( Altmlat, )
Tube
Galvanizing Panel,
SMDC
28 : I/P-2
C,nlJlft"
DR
RAJBlfDBA.
KUMAR
National
Metallurgical
Laboratory ( CSIIt.
),
Jamshedpur
M.,u",
SUBI
S. C. ANAJCD
Dbarat
Steel Tube.
Ltd.
Buy-
SKBt
SUDAa8H
KUMAR
BATRA
(
..41"'lIl1t,
)
SBRI
S.
R.
BBOOAL
Khandelwal
Ferro
Alloys
Ltd,
NalP
Uf
SHBI
C. D.
KBDIY.AL
( All"lIdl, )
SHBI
D.
DUTTA
The
Indian
'rube
Co
Ltd,Jamlhedpur
SHBI
NBBLalKAXTAK
Zenith
Steel
Pipes
and
Industries
Co
Ltd,
KbopoJi
DR
A. R.
KUKAB
(
AI,,,,..,,
)
SBBI
K.
M.
SIUJI
Gujarat
Steel
Tubes
Ltd,
Ahmedabad
SRB)
GOPAL
PATEL
(
AI,,,,..,,
)
SB'&J
K.
M.
T
A1O:JA
Directorate
General
of
Supplies
&:
Disposal.,
New
Delhi
SaRI
G. P. GUJtTA (
Al,,,,.,,,,
)
6
BUREAU
OF
INDIAN
STANDARDS
Headquarter,
Manak Bhavan, 9 Bahl\dur Shah Zafar Marg,
NEW
DELHI 110002
Telephones'
3230131,3233375,3239402
Fax + 91 011
3234062,3239399,
3239382
E •
man:
bls@VSnl.com.
Internet:
http./lwwwdel VlnLnet inlbls org
3221
04
52151
71
262808
323835
368586
723452
5501348
8394955
3237617
3378662
603843
2352315
8329295
403627
21 01 41
288801
71
1998
5411
37
3201084
37381i
21
6816
Road,
21
8923
C.ntral
Laboratory :
Plot No
2019,
Site IV, Sahrbabad Induatrlal Area, Sahibabad 201010
Reglon.1
Office.:
Central.
Manak Shavano 9 Bahadur Shah Zafa, Marg.
NEW
DELHI 110002
"Eastem : 1/14
CIT
Scheme VII, V I.P Roao, Kankurgachl, CALCUTTA 700054
Northern
SCQ
335-336, Sector 34·A, CHANDIGARH 160022
Southern C.I.T.
Campu"
IV Cross Road,
CHENNAI6001
13
1Western : Manakalaya, E9, MICC, Behind Marol Telephone Exchange,
Andherl
(East),
MUMBAI 400093
Branch
Office.:
'Pushpak', Nurmohamed Shaikh Marg, Khanpur
AHMEDABAD
380001
tPeenya Industrial Area. t st Stage, Bangalore-Tumkur Road,
BANGALOAE
560058
Commercial-cum-QHloe Complex, Opp.
Dusher.
Maldan,
E·5
Arer.
Colony,
Blttan Market.
BHOPAL
462016
62/63, GangaNagar,Unit VI, SHUBANESWAR 751001
Kalal Kathlr
Building,
670
Avlnashi Road, COIMBATORE 641018
Plot No. 43, Sector 16 A. Mathura Road, FARIDABAO 121001
Savitri Complex. 116 G.T.
Road,
GHAZIABAO
201001
53/5 Ward No 29, A.G. Barua Road. 5th By-lane, GUWAHATI 781003
5-8-56C, L.N.
Gupta
Marg,
Nampally Station Road. HYOERABAO 500001
E-52,
ChitranJan
M_g,
C·
Scheme.
JAIPUR
302001
,,1/418
B,
Sarvoday.
Nagar,
KANPUR
208005
Seth Bhawan,
2nd
F1oor,
Behind
Leet.
Cinem., Naval K1shor.
LUCKNOW
226001
NIT
BUilding,
Second
Floor. Gokulpat Market, NAGPUR
440010
Petllputra 'ndUl1rial Eatate, PA
TNA
800013
Inatftutfon of Englneerl
(India)
Buftcflng,
1332Shlvajl Nag..., PUNE411005
'Sahajanand
Houle'3rd
Floor,
Bt1IIk1Ineger
Circle,
eo
Feet
Roed,
RAJKOT
380002
TC.
No.
14/1421.
UniYer'Iity
P.O.
P_am,
THlRlNANANTHAPURAM
895034
·5a'"
Offa
lit at 5 Chowrlnghe.Approach,
P.O.
Prlncep
Street.
CALCunA
700072
t5at
..
OffIce
II
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Nowtty Chambetl, Grant
Road,
MUMBAI400001
*S
....
Office
I.
at
'F' Block, Unity
BuIlding.
N
....
htmar.,. Square,
BANGALORE
S6OOO2
271085
3088528
222 39 71
Reprogr.phv
Unit,
B'S, New
O8IhI.
tndla