American Society for Testing and Materials (ASTM). Current edition approved May 1, 2008. Published July 2008. Originally approved in 1994. Last previous edition approved in 2003 as A 926 - 03. 5 p. This test method covers a procedure for comparing materials used for coating, paving and lining corrugated metal pipe by use of a bed load abrasion testing machine. The procedure attempts to simulate the effect of stone, gravel and sand carried by a stream through corrugated metal pipe.