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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.
Gate, Globe, and Check Valves for Sizes DN 100 (NPS 4) and Smaller for the Petroleum and Natural Gas Industries
Standard published on 1.5.2022
Selected format:Corrosion-resistant, Bolted Bonnet Gate Valves-Flanged and Butt-welding Ends
Standard published on 1.12.2013
Selected format:Corrosion-resistant, Bolted Bonnet Gate Valves-Flanged and Butt-welding Ends
Standard published on 1.9.2018
Selected format:Fire Test for Quarter-turn Valves and Valves Equipped with Nonmetallic Seats
Standard published on 1.6.2016
Selected format:Fire Test for Quarter-turn Valves and Valves Equipped with Nonmetallic Seats
Standard published on 1.10.2022
Selected format:Metal Ball Valves - Flanged, Threaded, and Welding Ends
Standard published on 1.11.2012
Selected format:Metal Ball Valves-Flanged, Threaded and Welding Ends
Standard published on 1.11.2012
Selected format:Metal Ball Valves—Flanged, Threaded, and Welding Ends
Standard published on 1.1.2020
Selected format:Butterfly Valves: Double-flanged, Lug- and Wafer-type, and Butt-welding Ends
Standard published on 1.4.2021
Selected format:Centrifugal Pumps for Petroleum, Petrochemical, and Natural Gas Industries
Standard published on 1.9.2010
Selected format:Latest update: 2025-08-15 (Number of items: 2 211 582)
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