( Reaffirmed 1995 )
-fS ; 10483 - 1983
Indian Standard
CODE FOR DESIGNATING PERFORATIONS
OF INDUSTRIAL PLATE SIEVES
Sieves, Sieving and Other Sizing Methods Sectional Committee, BDC 19
Chairman
DR M. PANCHOLI
A-15123 Vasant Vihar
New Delhi
Members Representing
SHRI S. N. ARORA Shalimar Wires & Industries Ltd, Hooghly
SHRI S. KUMAR ( Alternate )
SHRI M. M. BAHAL Tata-Robins-Fraser Ltd, Jamshedpur
LT-COL C. A. RODRIQUES ( Alternate )
SHRI S. K. BANERJEE National Test House, Calcutta
SHRI P. R. DAS ( Alternate )
SHRI R. K. CHOURARIA Jeetmull Jaichandlall ( P) Ltd, Calcutta
DIRECTOR Central Water Commission, New Delhi
SHRI S. B. SURI ( Alternate )
DR P. C. JAIN National Physical Laboratory ( CSIR ), New
Delhi
SHRI J. N. BOHRA (Alternate )
DR P. T. JOHN In personal capacity ( ‘Ijlp III .No. 749 Jawaharlal
.Nehra Univcrsig: Quarters, Uttrakhond, New
Delhi )
SHRI C~ANDRAKANT L. KHAQRAB~ All India Wire Netting Manufacturers Associa-
tion, Bombay
SHRI A. R. A. KRISHNAN Ministry of Defence, New Delhi
SHRJ B. K. SINQH ( Alternate )
SHRI N. K. KOT~ARI Associated Cement Companies Ltd, Bombay
SHRI _j. MENDONSA All India Instrument Manufacturers & Dealers
Association ( Bombay Region ), Bombay ,,
SHRI C. P. SOOD ( Alternate )
SHRI A. V. S. R. A. SATRY Associated Instrument Manufacturers ( India )
Pvt Ltd, New Delhi
SHRI M. N. BALIQA ( Allernate )
SHRI HASMUKH C. SHAH Standard Wire Products, Bomhay
SnnI C. S. SHARMA Cement Corporation of India Ltd, New Delhi
( Continuedon page 2 )
@ Copyraght 1983
INDIAN STANDARDS INSTITUTION
This publication is protected under the Indian Copyright Act ( XIV of 1957 ) and
reproduction in whole or in part by any means except with written permission of the
oublisher shall be deemed to be an infrineement of coovrieht under the-said Act.
hti0483-1983
Members Representing
Sanr C. M. P. SIN~A Directorate General of Technical Development,
New Delhi
Suar C: P; Sooo .A!! India Instrument Manufacturers c Dea!ers
Association ( Delhi Region ), Delhi
DR V. V. SUBBA RAO Cement Research Institute of India, New Delhi
SHRI G. V. SIJBRAMANYA National Mineral Development Corporation,
New Delhi
SHRI G. S. RAMA KRISHNA RAO ( Alternate )
SUPERINTENDENT Steel Authority of India Ltd, New Delhi
SHBI A. K. SIN ( Altnnatc )
SHRI G. RAMAN, Director General, IS1 ( Ex-oficio Member )
Director ( Civ Engg )
Seuetary
SIXRI C. K. BEBARTA
Senior Deputy Director ( Civ Engg ), IS1
Sieves Subcommittee, BDC 19 : 1
Convener
DR P. C. JAIN NatiFe;Li Physical Laboratory ( CSIR ), New
Members
SHRI A. K. BHATTAOEARYA Geologist Syndicate Pvt Ltd, Calcutta
SHRI H. K. GUHA ( Alternate)
SHRI A. BHAUMIK Hem Lehmann ( India ) Pvt Ltd. Calcutta
CHIEF ENQINEEI~(TRAINING ) Central Public Works Department, New Delhi
SUPERINTENDINO ENQINEER
SHRI i ‘,RA=-;;;R~+ )
Jeetmull Jaichandlall ( P ) Ltd, Calcutta
S&I d. L. CHOURARIA f Alternate I
SHRI R. K. DUTTA Cknt;oll~~~lding Research Institute ( CSIR ),
SHRI S. P. ME~ROTARA ( Alternate )
SHRI A. D. &PTA Fertilizer Corporation of India Ltd, Dhanbad
SHRI N. S. DANI ( Alternate )
SEIRI A. K. JAIN Graphite India Ltd, Calcutta
SERI NAVIN MARWAH Sieves India, Bombay
SHRI MANU MARWAH ( Alternate )
SHRI C. M. NA~PAUL National Fertilizers Ltd, Nangal
DR V. V. SUBBA RAO Cement Research Institute of India, New Delhi
SHRJ M. V. RANQA RAO ( Alternate )
SHRI GIRISH J. TRIVEDI Unique Trading Corporation, Bombay
SHRI BIPIN J, TRIVEDI ( Alternate )
IS t 10483- 1383
Indian Standard
CODE FOR DESIGNATING PERFORATIONS
OF INDUSTRIAL PLATE SIEVES
0. FOREWORD
0.1 This Indian Standard was adopted by the Indian Standards Institu-
tion on 28 February 1983, after the draft finalized by the Sieves, Sieving
and Other Sizing Methods Sectional Committee had been approved by
the Civil Engineering Division Council.
0.2 Industrial -sieves made of perforated plates [see IS : 2405( Part II )-
1980 ]* are widely used for grading of stones, in the manufacture of
cement and sugar and for a variety of other purposes. These are produ-
ced in a number of combinations of sizes and shapes of aperture, plate
thickness. This Indian Standard gives proper communication guidance
between ~the purchaser and the supplier by codifying the designation of
perforated plates irrespective of the material used for manufacturing the
perforated plates.
0.3 In the formulation of this standard due weightage has been given to
international co-ordination among the standards and practices prevailing
in different countries in addition it to relating to the practices in the field
in this country. This Indian Standard is identical with ISO/DIS 7806
‘ Industrial plate screens - Codification for designating perforations ’
issued by the International Organization for Standardization ( IS0 ),
which is based on the work carried out by the European Association of
Manufacturers of Perforated Plate ( EUROPERF ).
1. SCOPE
1.1 This Indian Standard specifies the code for designating various kinds
of perforations and their arrangements in perforated plates. It applies to
perforated plate regardless of the plate material,
2. TERMINOLOGY
2.1 For the purpose of this Standard, the definitions given in IS : 5421”
19827 and IS : 5742 ( Part II )-1970$ shall apply.
*Specification for industrial sieves: Part II Perforated plates (Jirst reuision ),
PGlossary of terms relating to test sieves and test sieving (Jr~t revision ).
$.Terms and symbols for sieve bottoms: Part II Perforated plates.
3
-tS : 10483 - 1983
3. DESIGNATION
3.1 The perforation of a plate is designated by:
a) shape of the holes;
b) aperture size w, or aperture sizes w1 and w2 in case of slots;
c) mutual arrangements of holes;
d) pitch p, or pitches pI and pa in case where the pitches are diffe-
m.3, 111
Ati :n U,‘~~LI”I,Y
A:-Pc~:T\-. -nv_llnl
rXU41.U +n
L” thn
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tiU6U. V. CA&Y
nf thp I..-“,
nlat,-. ----
2nd
e) orientation of the arrangement of the perforation relative to the
edges of the plate.
3.2 The codification expresses, the items of designation by symbols and
magnitudes in the sequence used above.
NOTE - The purchaser should specify the size, thickness and material of the
perforated plate for his purpose in addition to the codification.
4. CODIFICATION
4.1 Shape of Holes - The shape of holes shall be designated by the
following symbols ( seeFig. 1 ):
R :&cular ( round )
C : Square, with-sides parallel to the edges of the plate
CD :Square, with diagonals parallel to the edges of the plate
H : Hexagonal
LR :Slots with round ends
ZC : Slots with square ends
@ fq=jf--$ txji
W w2 w2
H LR LC
FIG. 1 COPE FOR SHAPE OF HOLES
4
IS : 10483 - 1983
4-3 Anertmre
_-_ "rw"'-'- !%ve
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.I._Y,"'"'. -VI ahcane=
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ture size shall be stated in millimetres. The width of a slot, q, cornbiked
with its length, w,, by the sign x shall be stated in that order ( see Fig. 2 ).
--
da- G-4 L.__L-.L A_
L3 LIZI’ L;,i-;
HB LR Lx20 LC 5x25
FIG. 2 EXAMPLES OF CODED SHAPE OF HOLE AND APERTURE SIZE
4.3 Arrangement of Holes - Following the aperture size, the appro-
priate symbol for the arrangement of holes shall be stated as given in 4.3.1
to 4.3.4.
4.3.1 An arrangement of hoies with their midpoints at the vertices of
rectangles shall be coded U ( see Fig. 3 ).
_:_ --
I ,+- -i
A_
I _ _ __I
l- I
PI
L --l a-
+ -
I
-7
-A_ +-
-:-
I I
.I--P*----l
FIG. 3 U-ARRANGEMENT
5
’ tS: iO483- 1983
,4.3.2 An arrangement of holes with their midpoints at the verl .iccs of
rectangles and at the intersection -of their diagonals shall be codrd Z (see
Fig. 4 ).
l--p2-i
Fro. 4 Z-ARRANOEMENT
4.3.3 An arrangement of holes with their midpoints at the vertices of
squares and at the intersection of their diagonals, when the length of the
semi-diagonal is a round number, may be coded M ( see Fig. 5 }.
Fro. 5 M-ARRANGEMENT
6
IS : 10483- 1983
4.3.4 An arrangement of holes with their midpoints at the vertices of
equilateral triangles shall be coded T ( see Fig. 6 ).
FIG. 6 T-ARRANGEMENT
4.4 Pitch - Following the symbol for arrangement of holes, their pitch
or pitches shall be stated in millimetres.
4.4.1 For shapes R, C, CD or H in U- or Z-arrangements, both pitches
shall be stated, the shorter one, pl, first, and combined by the sign x
(see Fig. 7 and 8). In the case of a U-arrangement, when PI= f~s, only
p shall be stated ( seeFig. 9 ).
FIG. 7 EXAMPLEOFRlO U15 x 20
7
tiri0483i 1983
l-*0---J
.FIG. -8 EXAMPLE OF C5 215 x 20
L-*cMl
;
FIG. 9 EXAMPLE OF Cl0 U20
4.4.2 For shapes LR or LC ( slots ) in U- or Z-arrangements, the pitch
parallel to the width of the slots, p ,, shall be stated first (SIG Fig. 10
and 11). In the case of a U-arrangement, when p1 = p2, only p shall be
stated ( see Fig. 12 ).
I--,* -4
PIG. 10 EXAMPLE OILLR3 x lOIJ12 x 18
8
IS : 10483 - 1983
L-12-4
FIG, 11 EXAMPLEOF LC3 X 10 218 x 12
Fra. 12 EXAMPLEOF LClO X 15 U2O
4.4.3 For M- or T-arrangements, only p shall be stated ( see Fig. 13
and 14).
FIG. 13 EXAMPLEOF CD8 M12.5
9
IS I 10483 - 1983
FIG. 14 EXAMPLEOF H10 T16
4.5 Orientation of the Perforation of the Plate - There are operating
conditions in which the orientation of the perforations with the edges of
the plate affects the performance. Choice of orientation is stated as
Orientation 1 or Orientation 2 as given in 4.5.1 to 4.5.3.
-4.5.1 With the T-arrangement, Orientation 1 shall be with pitch fi
parallel to the longer edge ( see Fig. 15 ); and Orientation 2 shall be with
p parallel to the shorter edge ( see Fig. 16 ).
-f
P
FIG. 15 T-ARRANGEMENT,ORIENTATION1
10 ,
IS:iO483-1983
FIG. 16 T-ARRANGEMENT, ORIENTATION 2
4.502 With U- and Z-arrangements, Orientation 1 shall be with the
shorter pitch fi1 parallel to the longer edge ( see Fig. 17 ); and Orientation
2 shall be with the shorter pitch parallel to the shorteredge ( see Fig. 18 ).
4.5.3 With shapes LR and LC ( slots ) in U- or Z-arrangements, Orien-
tation 1 shall be with the width w1 parallel to the longer edge ( see
Fig. 19 ); Orientation 2 shall be with the width parallel to the shorter edge
( see Fig. 20 ).
11
la
_l
FIG. 17 EXAMPLEOF C5 ZlO x 18 ORIENTATION1 FIG. 18 EXAMPLEOF C5 ZIO x 18 ORIENTATION
2
l-----s6----l
Fm. 20 hAMF’&IZ 9~. T23?3)( 18 Zt2 )< 36 ORIENTAT3ON_2
_
