Standard Test Methods for Apparent Porosity, Water Absorption, Apparent Specific Gravity, and Bulk Density of Burned Refractory Brick and Shapes by Boiling Water1
This preferred is issued underneath the fixed designation c 20; the variety without delay following the designation indicates the year of authentic adoption or, inside the case of revision, the yr of ultimate revision. a range of in parentheses indicates the year of remaining reapproval. a superscript epsilon (e) shows an article exchange because the closing revision or reapproval.
This widespread has been accepted for use by way of agencies of the branch of protection.
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