API SPEC 20F-2018 Corrosion-resistant Bolting for Use in the Petroleum and Natural Gas Industries (S API STD 2015-2018 Requirements for Safe Entry and Cleaning of Petroleum Storage Tanks (EIGHTH EDITIO API 19C-2018 Measurement of and Specifications for Proppants Used in Hydraulic Fracturing and Gravel API STD 6AV1-2018 Validation of Safety and Shutdown Valves for Sandy Service (THIRD EDITION) API TR 13M-5-2018 Procedure for Testing and Evaluating the Performance of Friction (Drag) Reducers i API STD 2610-2018 Design, Construction, Operation, Maintenance, and Inspection of Terminal and Tank AATCC EP7-2021 Evaluation Procedure for Instrumental Assessment of the Change in Color of a Test Spe API MPMS 22.4-2018 Manual of Petroleum Measurement Standards, Chapter 22.4 Testing Protocol for Pres