Half Price Standard Code

Addendum to Calculation of Heater-tube Thickness in Petroleum Refineries, Seventh Edition
Amendment by American Petroleum Institute, 12/01/2021

Errata to Specification for Valves, Twenty-Fifth Edition
Amendment by American Petroleum Institute, 12/01/2021

Addendum 1 to Packers and Bridge Plugs, Fourth Edition
Amendment by American Petroleum Institute, 04/01/2022

S-N Fatigue Design Guidelines and Test Data for Low-alloy Steel Bolts
standard by American Petroleum Institute, 03/01/2022

Lubrication, Shaft-sealing and Oil-control Systems and Auxiliaries, Sixth Edition
standard by American Petroleum Institute, 02/01/2022

Automated Safety Instrumented Systems for Onshore Blowout Preventer Actuation, First Edition
standard by American Petroleum Institute, 02/01/2022

Check Valves: Flanged, Lug, Wafer, and Butt-welding, Ninth Edition
standard by American Petroleum Institute, 02/01/2022

Addendum 1 to Type Testing of Process Valve Packing for Fugitive Emissions, Third Edition
Amendment by American Petroleum Institute, 03/01/2022

Datasheets for API Std 681, Liquid Ring Vacuum Pumps and Compressors for Petroleum, Chemical, and Gas Industry Services, Second Edition
Data Sheet by American Petroleum Institute, 07/14/2021

Manual of Petroleum Measurement Standards Chapter 17.1, Guidelines for Marine Inspection, Seventh Edition
Handbook / Manual / Guide by American Petroleum Institute, 02/01/2022