Standard Practice for
Calculation and Adjustment of Silica (SiO2) Scaling for
Reverse Osmosis1
This standard is issued under the fixed designation D 4993; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
Click below to download Astm D 4993 – 89 (Reapproved 2003) Pdf free
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Click here to Astm D 4992 – 94 (Reapproved 2001) Pdf free download