The document defines the requirements and the tests for sands and gravels for well construction. The sands and gravels are used as filters in drilled wells.
DIN 4924:1998 history
2014DIN 4924:2014-07 Sands and gravels for well construction - Requirements and testing
2014DIN 4924:2014 Sands and gravels for well construction - Requirements and testing
1998DIN 4924:1998 Sands and gravels for well construction - Requirements and testing