ISO 349:1975
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ISO 349:1975
4300

État actuel : Annulée

Cette norme a été révisée par ISO 349:2020

Résumé

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.

Informations générales

  •  : Annulée
     : 1975-01
    : Annulation de la Norme internationale [95.99]
  •  : 1
     : 11
  • ISO/TC 27/SC 5
    73.040 
  • RSS mises à jour

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