ASTM-C159 › Complete Document History
Standard Specification for Vitrified Clay Filter Blocks

Complete Current Edition:
   2006 R21 EDITION - REAPPROVED IN 2021 - April 6, 2021

Obsolete Revision Information:
   2006 R16 EDITION - REAPPROVED IN 2016 - Nov. 1, 2016
   2006 R11 EDITION - REAPPROVED IN 2011 - Jan. 1, 2011
   2006 EDITION - Standard Specification for Vitrified Clay Filter Blocks - May 1, 2006
   1998 EDITION - Standard Specification for Vitrified Clay Filter Blocks - March 10, 1998
   1995 EDITION - Standard Specification for Vitrified Clay Filter Blocks - Oct. 10, 1995
   1991 EDITION - Standard Specification for Vitrified Clay Filter Blocks - July 15, 1991
   1986 EDITION - Standard Specification for Vitrified Clay Filter Blocks - Sept. 26, 1986