The ASTM D8134-2018 Standard Guide provides a standardized method for internal hydrostatic pressure testing for United Nations (UN) -certified intermediate bulk container (IBC) designs. The Guide aims to harmonize procedures for hydrostatic stress testing to ensure conformity of test results and reduce discrepancies between testing facilities. The Guide specifies in detail the sequence of tests, applicable test equipment and fittings, and emphasizes the need for leak-proof testing prior to hydrostatic stress testing. Applicable for testing of composite and rigid plastic IBCs to ensure compliance with U.S. Department of Transportation and United Nations regulations. This standard helps improve Reliability of Encasement performance and fairness of testing.