API RP 5EX-2018 Design, Verification, and Application of Solid Expandable Systems (FIRST EDITION) API RP 19G10-2018 Design and Operation of Intermittent Gas-lift Systems (FIRST EDITION) API STD 2015-2018 Requirements for Safe Entry and Cleaning of Petroleum Storage Tanks (EIGHTH EDITIO API SPEC 20F-2018 Corrosion-resistant Bolting for Use in the Petroleum and Natural Gas Industries (S API STD 6AV1-2018 Validation of Safety and Shutdown Valves for Sandy Service (THIRD EDITION) API STD 20L-2018 Qualification of Polymeric Seal Manufacturers for Use in the Petroleum and Natural API STD 2610-2018 Design, Construction, Operation, Maintenance, and Inspection of Terminal and Tank API 19C-2018 Measurement of and Specifications for Proppants Used in Hydraulic Fracturing and Gravel