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API (American Petroleum Institute) is a leader in the development of petroleum and petrochemical equipment and operating standards covering topics that range from drill bits to environmental protection. These embrace proven, sound engineering and operating practices and safe, interchangeable equipment and materials. Many have been incorporated into state and federal regulations and adopted by ISO for worldwide acceptance.
CHECK VALVES: FLANGED, LUG, WAFER, AND BUTT-WELDING *** FOR MONOGRAM LICENSEES ONLY ***
Standard published on 1.9.2010
Selected format:Check Valves: Flanged, Lug, Wafer, and Butt-welding
Standard published on 1.7.2017
Selected format:Check Valves: Flanged, Lug, Wafer, and Butt-welding
Standard published on 1.2.2022
Selected format:Valve Inspection and Testing
Standard published on 1.10.2016
Selected format:Valve Inspection and Testing
Standard published on 1.2.2023
Selected format:Metal Plug Valves-Flanged, Threaded and Welding Ends
Standard published on 1.1.2013
Selected format:Metal Plug Valves—Flanged, Threaded, and Welding Ends
Standard published on 1.3.2020
Selected format:Recommended Practice on Thread Compounds for Casing, Tubing, Line Pipe, and Drill Stem Elements
Standard published on 1.1.2021
Selected format:Thread Compounds for Casing, Tubing, Line Pipe, and Drill Stem Elements
Standard published on 1.2.2023
Selected format:Recommended Practice on Thread Compounds for Casing, Tubing, Line Pipe, and Drill Stem Elements
Standard published on 1.1.2021
Selected format:Latest update: 2025-08-18 (Number of items: 2 212 161)
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