ASTM-C421 › Complete Document History
Standard Test Method for Tumbling Friability of Preformed Block-Type and Preformed Pipe-Covering-Type Thermal Insulation

Complete Current Edition:
   2008 R20 EDITION - REAPPROVED IN 2020 - March 19, 2020

Obsolete Revision Information:
   2008 R14 EDITION - REAPPROVED IN 2014 - May 1, 2014
   2008 EDITION - Tumbling Friability of Preformed Block-Type and Preformed Pi - April 15, 2008
   2005 EDITION - Tumbling Friability of Preformed Block-Type and Preformed Pi - Aug. 1, 2005
   2000 EDITION - Tumbling Friability of Preformed Block-Type and Preformed Pi - Oct. 10, 2000
   1995 EDITION - Tumbling Friability of Preformed Block-Type and Preformed Pi - Aug. 15, 1995
   1988 EDITION - Tumbling Friability of Preformed Block-Type and Preformed Pi - Sept. 30, 1988