ASTM-D441

Tumbler Test for Coal

Applicability: ASTM D441 is a standard test method used to determine the friability of coal, which is its tendency to break or crumble during handling and transportation. It’s a crucial test for assessing coal quality and suitability for various applications.

Purpose: This test method covers the determination of the relative friability of a particular size of sized coal. It affords a means of measuring the liability of coal to break into smaller pieces when subjected to repeated handling at the mine or subsequently, by the distributor or by the consumer.