API TR 16TR1-2018 BOP Shear Ram Performance Test Protocol (FIRST EDITION; ERTA 1_ October 2018) API TR 979-2018 Applications of Refractory Lining Materials (FIRST EDITION) API TR 13TR3-2018 Size Measurement of Dry, Granular Drilling Fluid Particulates (FIRST EDITION) API SPEC 6A-2018 Specification for Wellhead and Tree Equipment (TWENTY-FIRST EDITION; API Monogram p 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 TR 17TR8-2018 High-pressure High-temperature Design Guidelines (SECOND EDITION; ERTA 1_ March 20 API SPEC 5CT-2018 Casing and Tubing (TENTH EDITION; API Monogram Program Effective Date_ August 1, 2