API certifications

73 American Petroleum Institute specifications are held by companies listed on Oilfield Index. Open one to see the certified companies and the categories they serve.

• API Q1Quality Management System Requirements for Organizations Providing Products for the Petroleum and Natural Gas Industry2060 companies
• API 6ASpecification for Wellhead and Tree Equipment815 companies
• API ISOISO 9001 Quality Management and/or ISO 14001 Environmental Management Systems764 companies
• API 7-1Rotary Drill Stem Elements633 companies
• API 6DSpecification for Valves622 companies
• API 5CTCasing and Tubing469 companies
• API 5BSpecification for Threading, Gauging, and Thread Inspection of Casing, Tubing, and Line Pipe Threads464 companies
• API 7-2Threading and Gauging of Rotary Shouldered Connections451 companies
• API 16ASpecification for Drill-Through Equipment420 companies
• API 5LLine Pipe302 companies
• API 16CSpecification for Choke and Kill Equipment237 companies
• API Q2Quality Management System Requirements for Service Supply Organizations for the Petroleum and Natural Gas Industries219 companies
• API 7KDrilling and Well Servicing Equipment218 companies
• API 600Valves - Steel Gate Valves, Flanged and Butt-Welding Ends212 companies
• API 609Valves - Butterfly Valves: Double-flanged, Lug- and Wafer-Type167 companies
• API 8CDrilling and Production Hoisting Equipment (PSL 1 and PSL 2)115 companies
• API 602Valves - Compact Carbon Steel Gate Valves113 companies
• API 4FSpecification for Drilling and Well Servicing Structures105 companies
• API 11D1Packers and Bridge Plugs97 companies
• API 20EAlloy and Carbon Steel Bolting for Use in the Petroleum and Natural Gas Industries86 companies
• API 608Valves - Metal Ball Valves71 companies
• API 594Valves - Wafer and Wafer-Lug Check Valves70 companies
• API 5DPDrill Pipe69 companies
• API 17DSpecification for Subsea Wellhead and Tree Equipment68 companies
• API 2BSpecification for the Fabrication of Structural Steel Pipe64 companies
• API 16DControl Systems for Drilling Well Control Equipment and Control Systems for Diverter Equipment59 companies
• API 10ACements and Materials for Well Cementing57 companies
• API 11AXSpecification for Subsurface Sucker Rod Pump Assemblies, Components, and Fittings54 companies
• API 14LLock Mandrels and Landing Nipples53 companies
• API 20FCorrosion-Resistant Bolting for Use in the Petroleum and Natural Gas Industries51 companies
• API 11BSucker Rods and Rod-Related Products50 companies
• API 11ESpecification for Pumping Units42 companies
• API 20BOpen Die Shaped Forgings for Use in the Petroleum and Natural Gas Industry35 companies
• API 9ASpecification for Wire Rope35 companies
• API 19ACSpecification for Completion Accessories34 companies
• API 6DSSSpecification for Subsea Pipeline Valves34 companies
• API 14ASubsurface Safety Valve and Annular Safety Valve Equipment29 companies
• API 5LCCRA Line Pipe29 companies
• API 5LDCRA Clad or Lined Steel Pipe29 companies
• API 650Welded Tanks for Oil Storage29 companies
• API 5CRACasing and Tubing - Corrosion Resistant Alloys26 companies
• API 12FShop-Welded Tanks for Storage of Production Liquids23 companies
• API 13ADrilling Fluids Materials23 companies
• API 20CClosed Die Forgings for Use in the Petroleum and Natural Gas Industry21 companies
• API 15LRSpecification for Low Pressure Fiberglass Line Pipe19 companies
• API 19G1Side-Pocket Mandrels18 companies
• API 2COffshore Pedestal-Mounted Cranes18 companies
• API 16RCDSpecification for Rotating Control Devices17 companies
• API 19G2Flow-Control Devices for Side-Pocket Mandrels17 companies
• API 15SSpoolable Reinforced Plastic Line Pipe15 companies
• API 2WSteel Plates Produced by Thermo-Mechanically Controlled Processing for Offshore Structures15 companies
• API 2HSpecification for Carbon Manganese Steel Plate for Offshore Structures14 companies
• API 15HRSpecification for High Pressure Fiberglass Line Pipe13 companies
• API 19BEvaluation of Well Perforators13 companies
• API 603Valves - Class 150, Cast, Corrosion-Resistant, Flanged-End Gate Valves12 companies
• API 17JSpecification for Unbonded Flexible Pipe10 companies
• API 2YSteel Plates, Quenched-and-Tempered, for Offshore Structures10 companies
• API 16ARStandard for Repair and Remanufacture of Drill-Through Equipment8 companies
• API 7FOil Field Chain and Sprockets8 companies
• API 16FSpecification for Marine Drilling Riser Equipment6 companies
• API 17KSpecification for Bonded Flexible Pipe6 companies
• API 19VSubsurface Completion Isolation (Barrier) Valves and Related Equipment6 companies
• API 5STSpecification for Coiled Tubing—U.S. Customary and SI Units6 companies
• API 19G3Running Tools, Pulling Tools and Kick-Over Tools and Latches for Side-Pocket Mandrels5 companies
• API 20ACastings for Oil and Gas Applications5 companies
• API 12BSpecification for Bolted Tanks for Storage of Production Liquids3 companies
• API 12DSpecification for Field-Welded Tanks for Storage of Production Liquids3 companies
• API 15LESpecification for Polyethylene Line Pipe (PE)3 companies
• API 18LCMProduct Life Cycle Management System Requirements for the Petroleum and Natural Gas Industries3 companies
• API 12PSpecification for Fiberglass Reinforced Plastic Tanks2 companies
• API 2FSpecification for Mooring Chain2 companies
• API 5LCPSpecification for Coiled Line Pipe2 companies
• API 7VDrill Stem Valves2 companies