Bulletin . Fig. 3. Type B Permeameter adopted as standard. This corresponds to pressure differences that areapt to occur when the bricks are used in furnaces and to air flow ratesthat can be measured conveniently. 19. Range of Usefulness.—Type B permeameter can be used inmeasuring the permeability of any of the commercial refractories. Bysuitable modifications, which will be described later, this range can begreatly extended. 20. Description of Permeameter.—As shown in Figs. 3 and 4, re-spectively, the apparatus consists essentially of a mercury trough andreservoir, two flowmeters (only one of
Bulletin . Fig. 3. Type B Permeameter adopted as standard. This corresponds to pressure differences that areapt to occur when the bricks are used in furnaces and to air flow ratesthat can be measured conveniently. 19. Range of Usefulness.—Type B permeameter can be used inmeasuring the permeability of any of the commercial refractories. Bysuitable modifications, which will be described later, this range can begreatly extended. 20. Description of Permeameter.—As shown in Figs. 3 and 4, re-spectively, the apparatus consists essentially of a mercury trough andreservoir, two flowmeters (only one of which is shown in the diagram),a small gasometer, and a pressure gauge. The mercury trough andreservoir are used in sealing the brick to the apparatus, the flow-meters in measuring the volume rate of air flow through the brick, andthe gasometer and pressure gauge in maintaining the standard pressuredrop across the brick. THE MEASUREMENT OF THE PERMEABILITY OF CERAMIC BODIES \q. l^ I M I I I I I I I I I i l II II I I I I I I I I I I I I I I I I I | I I I I I I I I I I I I I I >=6=
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectenginee, bookyear1904
