Disclosure to Promote the Right To Information
Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.
इंटरनेट मानक
“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda
“Invent a New India Using Knowledge”
“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru
“Step Out From the Old to the New”
“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan
“The Right to Information, The Right to Live”
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”
“Invent a New India Using Knowledge”
है”ह”ह
IS 2405-2 (1980): Industrial Sieves, Part II: PerforatedPlates [CED 55: Sieves, Sieving and other Sizing Methods]
Gr 3
IS : 2405 (Part II) - 1980( Reaffirmed 2008 )
Indian StandardSPECIFICATION FORINDUSTRIAL SIEVES
PART IIPERFORATED PLATES
(First Revision)
First Reprint NOVEMBER 1999
UDC 621.928.2.028.2
BIS 1980
BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI l10002
June 1980
IS .2405 ( Part II ) .1980
Indian StandardSPECIFICATION FOR INDUSTRIAL SIEVES
PART II PERFORATED PLATES
( First Revision)
Sieves, Sieving and Other Sizing MethodsSectional Committee, BDa 19
In personal capacity ( Typ,III, No. 749, ]tUlJGluulGlN,hru University Qrls, UltrakJuzntl, NIUJ DtW )
Ministry of Defence ( DOl)
All India Instrument Manufacturen & DealenAssociation ( Bombay Region ), Bombay
Central Water Commission, New Delhi
Hindu.tan Steel Ltd, Ranchi
Standard Wire Products, Bombay
( CMI-.J MIJttI- 2)
Jeetmull Jaichandlall ( P) Ltd, CalcuttaNational Physical Laboratory (CSIR), New
Delhi
CluJimuuaDB M. PANODOLY
A·lS/23. Vasant Vihar, New DelhiRtpr,s",t;ng
All India Wire Netting ManuCacturer. Association, Bombay
Shalimar Wires at Industries Ltd, 800gblySant S. N. ARORASam S. KUIIAR ( Alt""tJl, )
SDKI M. M. BAHAL Tata-Rcblns-Fraser Ltd,JamsbedpurLT.-CoL C. A. RODRIQUBS ( Altmaat, )
Snnr S. K. BANBBlltB National Test Houle, CalcuttaSunl P. R. DA8 ( Altlf'fttll, )
8nBI R. K. OnotmsnraDB P. O.JAIN
M""Iwr,SRB! P. N. ABORA
Snnr ]. N. Bonua (Allmwl,)DB P. T.JOBM
SHBI A. R. A. KRI811NAlfSHBI B. K. S,NOJI ( Alt"nau )
SUBIJ. MBKDOXCA
SUBI C. P. SOOD ( Allml4t, )SRBI R. V. RARTBJDBVAN
SRBI S. B. SOBI (.Alt,"u,")SBBI K. K. SUOllPrA
SRBI A. K. S.. (AltmIiJI,)SBBIIUaIl11KB C. SHAH
(j)~ 1980
BURBAU OF INDIAN STANDARDS11aJI pabUcatJoa II protected DDd.. the IN" CtJ/!1riI'" ~d (XIV 01 1957) aDdnproducdoD ID wbole 01' ill part by aD, muna except with writteD permlliioD oC thepabll.. aIaaIJ bedeemed to be aD lDfriDlem-t ~ coPyrilbt aDd. the laid Act.
Suut C. P. SOOD
SUIU R. RA:\(A St:lJRAMANJANSUR I II. C. VEU)lA
MtmlJnsS" I:' C. S. SIIAU)I.·\SJlJU C. ~f. P. ~JNJIA
18 I 2405 ( Part U ) • 1_
( Comi..dIrom /Ja" 1 )
R,prls,,,tingCement Corporation of India Ltd, Nc\v nelhiDirectorate General of Technical Development,
New DelhiAll India Instrument Manufacturers & Dealers
Alsociation ( Delhi Region ), DelhiThe Associated Cement Companies Ltd, BombayAssociated Instrument Manufacturers (India)
Pvt Ltd, New DelhiS,IJ:I A. V. S. R. A. SASTRY ( Alt"""u)
Sum D. AJITIlA SIMlIA, Director General, lSI (£X-officiD Mnnbn)Director ( Civ Engg )
S«rllarySHRI SURB8H MALKANI
Assistant Director ( Civ Engg ), lSI
Sieves Subcommittee, BDC 19: 1
COllven"Dn P. C. JAIN National Physical Laboratory (aSIR), New
DelhiMembers
SaRI A. K. BHATTACHARYA Geologist Syndicate Pvt Ltd, CalcuttaSURI H. K. GUDA ( AllmuJU)
SHIt) A. BHACMIK Hein Lehmann ( India) Ltd, BurdwanSlInT R. K. CHOUBARIA J~etmullJaichandlall ( P ) Ltd, Calcutta
SunI R. C. CHouBAnIA (AIUrnat, ) ,SURI A. D. GUPTA The Fertilizer Corporation of India Ltd, Dhanbad
Snur N. S. DANI ( ,Allmaat, )SHRI S. C. GUPTA Central Public Works Department, New DelhiSunt NAVIN MAR'VAH Sieves India, Bombay
Sum MANU MAHWAH ( Allmaat, )DB V. V. SUBDA RAO Cement Research In.titute of India, New DeIhl
SHRI M. V. RANOA RAO ( AllmuU,)SHRI M. R. SONll:JA Central Building Research Institute t RoorkeeSURI GU\J8BJ. TRIVEDI Unique Trading Corporation, Bombay
SHBI BalN J. TnlvBDI (~I""tIt')
2
AMENDMENT NO.1 JUNE 1985TO
IS:2405{Part 2)-1980 SPECIFICATION FORINDUSTRIAL SIEVES
PART 2 PERFORATED PLATES
(Fwst Rev i.eion )
(Fbge 7~ cLause 5.2) - Add the following afterclause 5.2:
'5 0 2 . 1 The maximum value of the corner radius of anysquare hole (r ) is given in millimetres, by the
maxfollowing formula:
r = 0.05 A + 0.30max
where A is the aperture size, inmill imetre s , t
(BDe 19)
Reprography Unit, lSI, New Delhi, India
.1 I 2_5 ( Put n ).1110
Indian StandardSPECIFICATION FOR INDUSTRIAL SIEVES
PART II PERFORATED PLATES
( First Revision)
o. FORE"WORD
0.1 This Indian Standard (Part II) (First Revision) was adopted bythe Indian Standards Institution on 30 January 1980, after the draftfinaJized by the Sieves, Sieving and Other Sizing Methods SectionalCommittee had been approved by the Civil Engineering Division Council.
0.2 Induatrialsieves made of wire cloth as well al of perforated plates arewidely used for grading of stones, in the manufacture of cement andsugar and for a variety of other industrial purposes. These are producedin a number of combinations of size and shape of aperture, wire diameteror plate thickness, and metal. Such variety is most confusing and to thevast majority of users, unnecessary; since each usually requires only a veryfew of these.
0.3 This standard was fint issued in 1963, with a view to cover therequirements of wire cloth and perforated plates having round and squareapertures, in the sizet most commonly used in a number of industries.This revision of the standard hal been prepared in two parts; Part Idealing with wire cloth sieves and Part II dealing with perforated plates,
0.3.1 In this part ( Part II ), R 20 preferred Dumber series for aperturesizes and pitches of hole. as recommended by International Organizationfor Standardization ( ISO 2194 Wire screens and plate screeDl for indu..trIM purposes - Nominal sizes of apertures and ISO Document ISO/TC 24/80 7 N24 ). has been followed. To suit different industrial UICS.. fiveclasses each of round hole and square hole perforated plates have beenspecified which give nominal open areas ranging from 64 percent to23 percent.
0.4 In the formulation of this standard .aistanee baa been drawn CromBS 1669: 1972 Specification for industrial perforated platea, ilsued by theBritilh Standards IDltitutiOD.
3
II I 2eOS ( Put 0 ) • 1980
0.5 For the purpose of deciding whether a particular requirement of thisstandard is complied with, the final value, observed or calculated, expresling the result of a test or analysis, shall be rounded off in accordancewith IS : 2-1960*. The number ofsignificant places retained in the roundedoff value should be the same as that of the specified value in thisstandard.
I. SCOPE
1.1 This standard ( Part II) specifies requirements for flat metal industrial perforated plates with round or square bole perforations, staggeredpitch.
1.1.1 The ranges of aperture sizes are 125 mm to g·15 mm for roundperforations and 125 mm to 4 mm for square perforations.
2. TERMINOLOGY
2.0 For the purpose of this standard, the following definitions shalla pply.
2.1 Aperture Size ( A ) - The diameter of a round hole or the distancebetween opposite sides of a square hole, measured on the punch side( SI' Fig. 1, 2 and 3 ).
2.2 Bridie Width -- The distance between the nearest edges of twoadjacent holes in a perforated plate, measured on the punch side( se« Fig. 1, 2 and 3 ).
2.3 Margin - The minimum distance between the outside edges of theoutside rows of holes and the edges of a perforated plate.
2.4 Pereeatage OpeD Area ( Screening Area) - The ratio of the totalarea of the apertures to the area of the perforated plate, excluding theunperforated margins, expressed as a percentage.
2.5 Perforated Plate - A plate with uniform holes in symmetricalarrangement, usually formed by punching.
2.6 Pitch (P) - The distance between the centres of adjacent roundholes in a perforated plate, or between the lines of centres of square holeseSI' Fig. I, 2 and 3 ).
2.7 Plate Thlckne•• - The thickness of the plate before perforation.
2.8 Paach Side - The surface of the perforated plate which the punchentered during the perforating operation.
• Rules Cor rounding ofT numerical values ('IV;S,tl).
4
18 I 2405 ( Part U ) • 1980
APERTURESIZE (A)
BRIOGEWIDTH
w
lc~
0-
IL0
W~
C)
...... 0:c wu
"t-
iL z0~
f
Flo. 1 ROUND HOLa PBRPORATIONS 60~ STAGGERED PITCH
1812405 (Put 0)-1_
Flo. 2 SQ,UARB HOLB PSRFORATIONS: STAOOERED PITCH
3. DESIGNATION or PERFORATED PLATES
3.1 Industrial perforated plates shall be designated by:
a) aperture size and shape,b) pitch and arrangement of apertures,c) plate thickness, andd) material of the plate.
f. MATERIAL AND PLATE THICKNESS
4.1 Industrial perforated plates shall be made of mild steel conforming toIS : 226·1975* or any other suitable metal. .
f.2 The ranges of thickness for mild steel industrial perforated plates aregiven in Table I., The thickness for plates of metal other than mild steelmay vary from those given in Table 1.
·Specification Cor Itructural Itee1 ( ItaDdard quality) (fi/l" ,lIJisi,II ).
6
IS ,2405 ( Part II ) .1910
PITCH
f~'
1 rBRIOUEWIQTH
I APERTURE .-..-_..-.......~ (A)I.
Flo.3 SQ,UARE HOLE P.ERFORATIONS: IN-LINE ARRANOEMENT
5. APERTURES AND PITCHES
5.1 Shape.ac1 ArraalellleDt 4)fAperture. - Shape and arrangementof apertures shall be as shown in Fig. 1 to' 3. Figure 1 shows the usualround hole arrangement of 600 staggered apertures with respect to thelong edge of the plate. Figure 2 shows square hole apertures -sta~eredat half the pitch. Figure 3 showl the square hole apertures placed • In-linearrangement ••
5.2 Aperture Sbe ~ The nominal sizes of round or square holes inindustrial plate screens shall be as given in Table 2. .
5.3 PitCh - The ratio of the nominal pitch to the nominal aperture sizeshould be taken from the five options:
1-25, 1-4, 1-6, I·S, 2-0
The five pitch/aperture ratios give five open areas for round as wellas square holesaa indicated in Table 2. The nominal pitches to give thefive open areas for each aperture size are also listed in Table 2.
... ell
TA
BL
E1
IlA
NG
EO
FP
LA
TE
TB
lCK
NE
SS
I'O
RV
AR
IOU
SA
PE
IlT
lJ1l
ES
JZB
RA
NG
ES
AN
Dp
iTC
B/A
PE
RT
VB
.EIl
AT
lOS
(a
..4
_2
)
S-15
to25
3-15
to25
S-IS
to25
3-15
to25
3-15
to25
2-5
JJ20
2-5
,t20
2-5
,,2
02-
5,,
20
2-5
,,2
0
1-6
..is
1-6
"16
1-6
u16
1-6
II
161-
6,,
16
1-6
It
91-
6"
11-2
1-6
,.12
-51-
6It
12-5
1-6
It12
-5
1-6
"6
1-6
JJ
7-1
1-~
..9
1-6
,t10
1-6
,,1
0
1-25
n4
1·2
5"
51-
25II
61-
25"
711
-25
"8
1-25
"3
1-25
"3-
61-
25JJ
f1
-25
"f
1-25
~3
1-2
5"
S
All
dim
enai
OA
liu
mil
lim
etre
a.i 1:1~
• iN ! ~
2i-a
1-6
.1-4
1-25
PlT
cB'
·AP
a'-'
11
BB
R.A~lo
<,
MD
nJB
-SI
S.ltA
JIo
a
--
00
125
dow
Dto
100
Bel
ow10
0do
wn
to63
II·
63"
"40
"40
""
20
"20
".,
12-5
't12
-5"
I'a
"8
I'I,
5
It
5u
"S·
15
IS 12405 ( Part II ) .1980
5.4 ToleraDee - The tolerances on measured average aperture andmeasured average pitch from nominal aperture size and nominal pitchrespectively are given in Table 2.
5.f.1 The tolerances on measured size of any individual aperture orpitch are also given in Table 2.
6. MARKING
&.1 The perforated plates shall have a permanently attached label onwhich the following information shall be marked:
a) Aperture size;
b) Aperture shape;c) Pitch;d) Aperture arrangement ( see Fig. 1, 2 and 3 );e) Plate thickness;
f) Material of plate;
g) Overall dimensions of plate;
h) Particulars of margin, if required;j) Fixing arrangements for plate; and
k) Any special requirements.
NOTR - This standard refers to flat perforated plates. Requirements for curvedplates should bo agreed between the purchaser anti the manufacturer.
6.1.1 The product may also be marked with Standard mark.
6.1.2 The use of the Standard Mark is governed by the provisions of theBureau of Indian Standards Act, 1986 and the Rules and Regulations madethereunder. Tbe details of conditions underwhich the licence for the use ofStandard Mark may be gnnted to manufacturers or producers may be obtainedfrom the Burelu of Indian Standards.
7. METHOD OF EXAMINATION OF PERFORATED PLATES
7.1 Measurement of pitch and aperture size shall be made at the punchside of the plate.
9
TA
BL
E2
PR
EF
ER
RE
DP
ITC
H.A
PE
RT
UR
EC
OM
BIN
AT
ION
SF
Oil
RO
UN
DH
OL
ES
AT
600
ST
AG
GE
RA
ND
SQ
UA
RE
HO
LE
SIN
INI)
US
TR
LU
.P
ER
PO
RA
TE
DP
lAT
ES
(ClI
IIU
U5_
2,5.
3an
d5
.4)
All
dim
ensi
on
sin
mil
lim
etre
s.
PIT
CB
/Ap
JmT
UB
BR
AT
IO
1·25
1·4
1·6
1·8
2·0
A,p
PR
OX
OP
EN
AR
EA
RoU
ft:l
Hol
es
58°'
46%
35
%2
8%
23
%10
Squa
reH
oles
G4~J~
51~~
390k
31
%25
%
Ap
ZK
TU
RB
PIT
CH
TO
LB
BA
KC
ZO
N'
PIT
CH
.---"-.
\r-
---A
.-~
t-..
A-_
__
_~
...N
om
inal
Av
erag
eIn
divi
dual
Ave
rage
Indi
'\'"i
dual
0Si
zeT
ole
ran
ceT
ole
ran
ce(l
l10
Seri
ea)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
125
3-0
6-0
155
---
--
4-8
9·6
112
2-7
5-4-
140
--
--
4-4-
8-&
100
2-5
5·0
125
--
--
4-0
8-0
902-
34-
611
0-
--
-3-
77-
4
802-
14-
210
0-
--
-3-
46·
&
711
·9a-
a88
100
--
-3-
16·
2
6S1-
73·
...78
88lO
O-
-2-
&5·
656
1-5
3-0
7078
90-
-2-
5S·
O50
1·...
2·8
6370
80-
-2-
54-
6
451-
32-
656
6S72
--
2-1
4-2
401-
22·
...50
5664
--
-1-
9s-
&
... • - N S '" r =-.... • ... I
35-5
I-I
2-2
44SO
57-
-1-
73-
4-31
-51-
02
·040
44-
50-
-1-
63-
228
0-9
i-a95
3945
--
1-4-
2·8
250-
811
>32
3540
--
1-3
2-6
22-'
0-7
1-.28
3236
--
1-2
2-4-
200-
6)-
225
2832
--
I-I
2·2
180-
61-
22
2-5
2528
--
1-0
2-0
16o-
sJ-
O20
22-5
26-
-0-
91-
8It
0-4-
O·g
17-5
19-5
22
·5-
-0
-81-
612
-50
·.0-
815
-75
17·5
20-2
2-5
-0-
751-
511
-20-
40-
814
15-7
518
20-
0-65
1·3
10&
350-
7-1
2·5
14-
1618
-0-
61-
29
0-3
0-6
-11-
2512
-514
-16
-5-
0-55
I-I
80-
30-
6-1
011
-25
12-5
14-
-16
0-5
1·0
...7-
10-
250
·5•
S·75
1011
-25
12
·5-1
4-0
·45
0-9
....0
-25
0-5
t8-
7510
11-2
5-1
2-5
0·4
0-8
6-3
-5-
60-
20
·4-
-•
010
11-2
50-
360-
72
50-
20·
4--
-•
89
100-
330-
664
·50-
150·
3-
-•
77-
59
0-30
0·60
...0-
150-
3•
67
7·5
0-27
0-54
•f
--
-3·
550-
150·
3-
--
5-25
-6·2
57
0-25
0·50
N
g-15
0-15
0·3
--
•5
-5-2
56-
250-
220-
44•CIt --- I
-Fo
rro
un
dp
erfo
rati
on
son
ly_
=.-..... •tF
or
lQua
rep
erfo
rati
on
so
nly
,... I
18 I 2405( Put D ) • 1980
7.2 The number of apertures or pitches measured in order to arrive at anaverage may vary according to the number of perforations in the plate.A minimum sample N of apertures or pitches may be chosen using theexpression:
N := 2 + (100/.4 )
where
A == aperture size in millimetres, a proper fraction being takenas an integer.
8.8AMPUNG
8.1 Lot - All the perforated plates of the same class, same nominalaperture I manufactured from plates of same thickness and lame cast, underidentical conditions of manufacture, shall be grouped together to constitute a lot.
8.2 Each lot shall be taken up separately for determining conformity tothe requirements of this specification. For this purpose samples shall betaken depending upon the size of the lot in accordance with 8.2.1.
8.2.1 The number of sample perforated plates CroJD a lot shall be inaccordance with Level IV of Table 1 of IS : 2500 (Part I )-1973- andTable 2 of IS : 2500 ( Part I )-1973-.
83 All the sample perforated plates selected in 8.2.1 shall be il\spectedfor all the requirements of this specification. Any sample perforated platefailing in anyone or more of the requirements sbal! be termed asdefective. Based on the number of defective sample perforated plate.the criterion to determine the conformity or otherwise of the lot to therequirements of this specification shall be in accordance with AQ,L of2·5 percent in l"able 2 of IS : 2500 ( Part I )-1973-.
·SampUDJ lupecdoa tabl.: Part I IDIpectioa by attrlbut. uad by COUIlt ordelecu(JIll"").
12
BUREAU OF INDIANSTANDARDS
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