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 5742-2 (1970): Terms and symbols for sieve bottoms, PartII: Perforated plates [CED 55: Sieves, Sieving and otherSizing Methods]

IS : 5742 ( Part II ) - 1970

Indian Standard TERMS AND SYMBOLS FOR

SIEVE BOTTOMS

PART 41 PERFORATED PLATES

Sieves, Sieving and Other Sizing Methods Sectional Committee, BDC 19

Chairman

DR K. N. MATHUR

National Physical Laboratory, Hillside Road, New Delhi 12

Member.r Representing

SHRI S. N. AROXA Shalimar Wires & Industries Ltd, Uttarpara SHRI D. N. CHARRARORTY ( Alternate )

SHRI S. K. BAJORIA Krishanlal Thirani & Co Ltd, Calcutta SHRI S. K. GANDHI ( Alternate )

SRRI N. N. BANERJEE All India Instrument Manufacturers and Dealers Association ( Bombay Region )

SHRI R. R. CHAKRABORTY National Instruments Ltd, Calcutta DR I. C. DOS M. PAIS CUDDOU Central Water & Power Commission, New Delhi

SHRI S. V. SUKYANARAINA (Alternate) SHRI HARCHAND SIN~H The Indian Steel & Wire Products Ltd, ,Jamshedpur

SHRI R. R. KAYI.ISH ( Alternate ) Dx. R. R HATTIAN~ADI The Associated Cement Companies Ltd, Bombay

DR 61. K. GHAI~PULIEY (Alternate) JOINT DlRt3:lXoR, RESEARCH Research, Designs and Standards Organization,

( FE ), RDSO Ministry of Railways, Lucknow DEPUTY Ilr~m~on, RESEARCH

( FE ), RDSO ( Alternate ) SHRI D. S. JOSHI Hindustan Boilers, Bombay LT-COL R. V. N. KADAMBI Research and Development Organization ( Ministry

of Defence 1 SHTCI N. MOHAN RAO ( Alternate )

SHRI CHANDRAKANT L. KHAQKAM All India Wire Netting Manufacturers’ Association,

SHRI V. KRISHNAI+IOORTHY SHI~I R. N. MALLICK SHRI H. M. MARWAH

Bombay Directorate General of Technical Development Directorate General of Technical Development Hindustan Wire Netting Co Ltd, Bombay

SHRI G. H. MARWAH ( Alternate) SHRT D. K. MEHTA Tata-Tobins-Fraser Ltd, Jamshedpur

SHRI M. H. RAO (Alternate ) SHRI PKEM PRAKASH National Physical Laboratory ( CSIR ), New Delhi SHRI R. RAJARAMAN Central Board of Irrigation & Power, New Delhi

( Continued on page 2 )

INDIAN ST-ANDARDS INSTITUTION MANAK BHAVAN, 9 BAHADUR SHAH ZAF.4R MARG

NEW DELHI 1

IS : 5742 ( Part II ) - 1970

( Continued from page 1)

Members Representing

“,an~;E~f~ RAMACHANDRAN National Test House, Calcutta Tata Iron & Steel Co Ltd, Jamshedpur

SHRI D. D. BHUPTANI ( Alternate ) SRRI J. R. SACHDEVA Defence Production Organization ( Ministry of

Defence ) SHRI K. C. M~SEA ( Alternate)

SRRI K. K. SENGUPTA Hindustan Steel Ltd, Dhansar SHI~I A. K. SEN ( Alternate )

SRIII P. N. SOOD All India Instruments Manufacturers and Dealers Association ( Delhi Region)

SHRX P. V. SUBBA RAO The Andhra Scientific Co Ltd, Masulipatarn’ SHRI K. C. TOSHNIWAL All India Instrument Manufacturers and Dealers

Association ( Calcutta Region ) SHRI H. C. VERMA Associated Instrument Manufacturers ( India )

Private Ltd, New Delhi SHRI A. V. A. SHASTRI ( Alternate )

SHRI R. NAQARAJAN, Director General, IS1 ( Ex-oficio Member ) Director ( Civ Engg )

Serretary

SHRI VINOD KUIXA a

Assistant Director ( Civ Engg ), IS1

IS : 5742 ( Part II ) - 1970

Indian Standard TERMS AND SYMBOLS FOR

SIEVE BOTTOMS

PART II PERFORATED PLATES

0. FOREWORD

0.1 This Indian Standard (Part II ) was adopted by the Indian Standards Institution on 30 July 1970, 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 A series of Indian Standards relating to sieves, methods of sieving with wire cloth and perforated plates for industrial sieves, domestic sieves has been prepared or is under preparation. These include a large number of terms and symbols used for defining screen bottoms. The extensive use of these terms has necessitated the preparation of this glossary; Part I of which covers woven and welded screens and Part II 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 to relating it to the practices in the field in this country. This has been met by basing the standard on ‘DIN 4185 Part 2 Screen bottoms, definitions and letter symbols for perforated screen bottoms’ issued by Deutscher Normenausschuss.

1. SCOPE

1.1 This standard (Part II ) gives various terms and their explanations with illustrations relating to perforated plates. The concerned symbols are also given,

2. TERMS AND SYMBOLS FOR PERFORATED PLATES

2.1 The terms and symbols for screen bottoms relating to perforated plates have been classified into the following main sections and are given in Ta,ble 1:

a) General,

b) Types of holes, and

c) Arrangement of holes.

TABLE 1 TERMS AND SYMBOLS FOR PERFORATED PLATES UI 4

( C!ause 2.1 )

Sz.No.6~ TERM

1. GENE<RAL

1. i Perforated plate side

4

1.2 Hole width

I .2.1 For round holes

1.2.2 For squar6 holes

1.2.3 For elongated holes

1.2.4 Fbr hexagonal holes

b,

I .3 Hole Img1h 1

-

_

Length of the side of the perforated plate in the direction of the larger hole spacing

Length of the side of the perforated plate in the direction of the smaller hole spacing

i _

-

Dianleter of the perforation

Length of the side of the hole

Smaller dimension of the hole

Dtlyce;r of the inscribed

Longest dimenhi(;n of the hole

-

See Fig. for 1.2.3

TABLE 1 TERMS AND SYMBOLS FOR PERFORATED PLATES - Contd

SL No, & TERM

1.6 Pitch

1.6.1 For round holes

1.6.2 For square holes

1.6.2.1 Straight and diagonal rows

1.6.2.2 Parallel rows of staggered holes

SYMBOL

-

t

t

-

-

_-

EXPLANATION

Distance between centres of two neighbouring holes . t=c+2 ;.= c+TY

-

Distance between centres of two neighbouring square holes t=c+W

Distance between the centres of two neighbouring square holes or distance between centres of two rows of square holes t=c+W

_____ _~__ - . ..- -----.--_~-

ILLUSTRATION

‘I T

~_~~ ~~~~~

2. TYPES OF HOLES

2.1 Round holes

2.2 Square holes

2.3 Elongated holes

2.4 Hexagonal holes

2.5 Other holes

R

(2.

I‘R

I-i

-

3. AkRANGEXIENT OF U HOLES

3.1 Round holes

3 1.1 In st;lggcrcd rows

3.1.2 In diagonally staggrled rows

I

R,

Rd -

-

TABLE 1 TERb AND SYMBOLS FOR PERFORATED PLATES - Contd E: . . VI

pp I 1 z! SL No. & TERM SY?mOL 1 EXPLANATION I ILLUSTRATION

i3 h

I I ,.--.-...-----_ I

-~. 3 3.1.3 In straight rows RP i -

3.2 Scjuare holes

3.2.1 Parailel ( staggered )

z

3.2.2 Diagonal

3.2.3 In straight rows

Qs

Qd

QP

T ._ / I -

-

;

-

-

t + w

IS:

460-1962

1568-1960

1607-1960

2405- 1963

3150-1968

4124-1967

4879-1968

4961-1968

5257-1969

5258-1969

5282-1969

5421-1969

INDIAN STANDARDS

ON

Sieves, Sieving and other Sizing Methods

Test sieves ( noised ) . . . . . . . . . . . . . . .

Wire gauge for general purposes . . . . . . . . . . . .

Methods for dry sieving . . . . . . . . . . . .

Wire cloth and perforated plates for industrial sieves . . . . . .

Hexagonal wire netting for general purposes (Jirst revision ) . . .

Glossary of terms relating to powders . . . . . . . . .

Method of sub-division of gross sample of powder used for determina- tion of particle size . . . . . . . . . . . . . . .

Determination of particle size of powders by air elutriation methods

Eyepiece and screen graticules for determination of particle size of powders . . . . . . . . . . . . . . . . . .

Determination of particle size of powders by optical microscope method . . . *.. . . . . . . . . . . . .

Liquid sedimentation methods for determination of -particle size of powders . . . . . . . . . . . . . . . . . .

Glossary of terms relating to test sieves and test sieving . . . . . .

Rs

8.00

1.50

5.50

2.50

1.50

3.50

5.50

7.50

2.00

11.00

8.50

2.50