Reference number
ISO 349:1975
© ISO 2024
ISO 349:1975
Hard coal — Audibert-Arnu dilatometer test
Edition 1
1975-01
Retirada
Retirada (Edición 1, 1975)

Resumen

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.

Informaciones generales

  • Estado
     : Retirada
    Fecha de publicación
     : 1975-01
    Etapa
    : Retirada de la Norma Internacional [95.99]
  • Edición
     : 1
    Número de páginas
     : 11
  • Comité Técnico :
    ISO/TC 27/SC 5
    ICS :
    73.040 
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