API RP 505-2018 Recommended Practice for Classification of Locations for Electrical Installations at API RP 5EX-2018 Design, Verification, and Application of Solid Expandable Systems (FIRST EDITION) API RP 2027-2018 Ignition Hazards and Safe Work Practices for Abrasive Blasting of Atmospheric Stora API RP 19G10-2018 Design and Operation of Intermittent Gas-lift Systems (FIRST EDITION) API RP 1115-2018 Design and Operation of Solution-mined Salt Caverns Used for Liquid Hydrocarbon Sto API RP 934-E-2018 Recommended Practice for Materials and Fabrication of 1_Cr-_Mo Steel Pressure Vess API TR 6MET-2018 Metallic Material Limits for Wellhead Equipment Used in High Temperature for API 6A API STD 603-2018 Corrosion-resistant,bolted bonnet gate valves. Flanged and butt-welding ends (ninth