API 598 – Valve Inspection and Testing This standard covers inspection, examination, supplemetary examinations, and pressure test requirements for resilient-seated, nonmetallic-seated (e.g. ceramic), and metal-to-metal-seated valves of the gate, globe, plug, ball, check, and butterfly types, Resilient seats are considered to be: a) soft seats, both silid and semi-solid grease type(e.g. lubricated plug) b) cmbination…

API 602 Steel Gate, Globe and Check Valves for Sizes DN 100 and Smaller for the Petroleum and Natural Gas Industries This International Standard specifies the requirements for a series of compact steel gate, globe and check valves for petroleum and natural gas industry applications. It is applicable to valves of – nominal sizes DN…

API 608 Metal Ball Valves—Flanged, Threaded and Welding Ends API 608 specifies the requirements for metal ball valves suitable for petroleum, petrochemical and industrial applications that have: — flanged ends in sizes NPS 1/2 through NPS 20 (DN 15 through DN500); — butt-welding ends in sizes NPS 1/2 through NPS 20 (DN 15 through DN 500);…

API 600 – Bolted Bonnet Steel Gate Valves for Petroleum and Natural Gas Industries API 600 specifies the requirements for a heavy duty series of bolted bonnet steel gate valves for petroleum refinery and related applications where corrosion, erosion and other service conditions indicate a need for full port openings, heavy wall sections and extra large…

API 594 Check Valves: Flanged, Lug, Wafer and Butt-welding API 594 covers design, material, face-to-face dimensions, pressure-temperature ratings, and examination, inspection, and test requirements for two types of check valves. Type ‘A’ check valves are short face-to-face and can be: wafer, lug, or double flanged; single plate or dual plate; gray iron, ductile iron, steel, nickel…

API 609 – Butterfly Valves: Double Flanged, Lug- and Wafer-Type This standard covers design, materials, face-to-face dimensions; pressure-temperature ratings; and examination, inspection, and test requirments for gray iron, ductile iron, bronze, steel, nickel-base alloy, or special alloy butterfly valves that provide tight shutoff in the closed position and are suitable for flow regulation. Valve configurations…

API 6D – Specification for Pipeline Valves API 6D specifies requirements and provides recommendations for the design, manufacturing, testing and documentation of ball, check, gate and plug valves for application in pipeline systems meeting the requirements of ISO 13623 for the petroleum and natural gas industries. API 6D is not applicable to subsea pipeline valves, as they…