API STD 2610-2018 Design, Construction, Operation, Maintenance, and Inspection of Terminal and Tank API STD 20L-2018 Qualification of Polymeric Seal Manufacturers for Use in the Petroleum and Natural API STD 622-2018 Type Testing of Process Valve Packing for Fugitive Emissions (THIRD EDITION) API TR 13M-5-2018 Procedure for Testing and Evaluating the Performance of Friction (Drag) Reducers i API STD 2015-2018 Requirements for Safe Entry and Cleaning of Petroleum Storage Tanks (EIGHTH EDITIO API STD 6AV1-2018 Validation of Safety and Shutdown Valves for Sandy Service (THIRD EDITION) GB 150.4-2011 Pressure Vessels Part.4 FABRICATION INSPECTION AND TESTING AND ACCEPTANCE ASM Handbook Volume 17:Nondestructive Evaluation and Quality Control 9th Edition