WK97910 - Revision of C421-08(2020) Standard Test Method for Tumbling Friability of Preformed Block-Type and Preformed Pipe-Covering-Type Thermal Insulation

Work Item

ASTM WK97910

Revision of C421-08(2020) Standard Test Method for Tumbling Friability of Preformed Block-Type and Preformed Pipe-Covering-Type Thermal Insulation

C421-08(2020) was balloted for reapproval in fall of 2025 and received one (1) persuasive negative on notes placement.

Developed by Subcommittee: C16.32

Committee: C16

Staff Manager: Mary Mikolajewski

Date Initiated: 01-28-2026

Technical Contact: Patrick Noonan