API RP 60

Describes procedures and equipment that can be used in testing and evaluating of high-strength proppants stronger than silica sand. The objective of the recommended tests is to improve the quality of high-strength proppant materials delivered to the well site. Suggested procedures are presented for proppant sampling; samples handling, storage, and retention; sieve analysis of proppant samples; determining average particle sphericity and roundness; determining proppant crush resistance; and determining density of proppant materials.