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ISO 349:1975

Hard coal — Audibert-Arnu dilatometer test

Jan 1, 1975
95.99   Withdrawal of Standard   Jan 13, 2020

General information

95.99     Jan 13, 2020

ISO

ISO/TC 27/SC 5

International Standard

73.040  

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Scope

Specifies a method for determining the swelling properties of hard coal when heated under standard conditions in a dilatometer. In performing the method a pencil made of powdered coal formed under pressure is inserted into a precisely calibrated narrow tube and topped by a calibrated steel rod which slides in the bore of the tube. The whole is heated at a constant and definite rate. By making regular readings of the displacement of the rod as a function of the temperature and expressing the displacements observed as percentages of the original length of the penicl a curve is plotted.

Life cycle

NOW

WITHDRAWN
ISO 349:1975
95.99 Withdrawal of Standard
Jan 13, 2020

REVISED BY

PUBLISHED
ISO 349:2020