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U D C 621.928 Ref. No.: ISOlR 565 - 1967 (E)
IS0
I N T E R N AT I O N AL O R GAN 1 Z AT 1 O N F O R S T A N D AR O I 2 AT I O N
IS0 RECOMMENDATION
R 565
WOVEN WIRE CLOTH AND PERFORATED PLATES
IN TEST SIEVES
NOMINAL SIZES OF APERTURES
1st EDITION
April 1967
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The copyright of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of ISO.
For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian. Copies to be obtained through the national standards organizations.
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BRIEF HISTORY
The IS0 Recommendation R 565, Woven Wire Cloth and Perforated Plates in Test Sieves -
Nominal Sizes of Apertures, was drawn up by Technical Committee ISO/TC 24, Sieves, Sieving
and other Sizing Methods, the Secretariat of which is held by the Deutscher Normenausschuss
(DNA).
Work on this question by the Technical Committee began in 1956 and led, in 1964, to the
adoption of a Draft IS0 Recommendation.
In April 1965, this Draft IS0 Recommendation (No.805) was circulated to all the IS0
Member Bodies for enquiry. It was approved, subject to a few modifications of an editorial nature,
by the following Member Bodies :
Brazil Ireland U.A.R.
Canada Israel United Kingdom
Chile Netherlands U.S.A.
France New Zealand U.S.S.R.
Germany Sweden Yugoslavia
Hungary Switzerland
India Turkey
One Member Body opposed the approval of the Draft:
Italy
The Draft IS0 Recommendation was then submitted by correspondence to the IS0
Council, which decided, in April 1967, to accept it as an IS0 RECOMMENDATION.
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ISOIR 565 - 1967 (E)
IS0 Recommendation R 565 April 1967
WOVEN WIRE CLOTH AND PERFORATED PLATES
IN TEST SIEVES
NOMINAL SIZES OF APERTURES
1. SCOPE
This IS0 Recommendation gives the nominal sizes of apertures for woven wire cloth and per-
forated plates in test sieves.
2. TYPE OF SIEVING MEDIA IN TEST SIEVES
2.1 Woven wire cloth consists of wires woven to form nominally square apertures.
2.2 Perforated plates are metal plates with either squ
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