International Standard
ISO 561:1989
Coal preparation plant — Graphical symbols
Reference number
ISO 561:1989
ISO 561:1989
Edition 2
1989-12
1989-12
© ISO 2024
International Standard
p
ISO 561:1989
4651
Published
(Edition 2, 1989)
This standard was last reviewed and confirmed in 2023.
Therefore this version remains current.
Abstract
The symbols have been selected in accordance with the following principles: a) the plants should be widely used; b) the symbols should be easy to draw and readily be distinguishable one from another; c) the principle and not the appearance of any particular type of machine should be represented, d) where a single symbol represents a group of items for which separate symbols are s-tandardized nationally, the ISO symbol should be readily distinguishable from any one of the national symbols.
General information
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Status: PublishedPublication date: 1989-12
Corrected version (en): 1992-07
Corrected version (fr): 1992-07Stage: International Standard confirmed [90.93] -
Edition: 2Number of pages: 13
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Technical Committee :ISO/TC 27/SC 1
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Life cycle
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Previously
WithdrawnISO 561:1974
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Now
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