API - American Petroleum Institute

The American Petroleum Institute - API represents more than 400 members involved in the oil and natural gas industry. Over 900 API standards serve as the basis for API quality programs covering production material and lubricants, and certification programs for storage tanks, pressure vessels, and piping inspectors.

Publication CodeTitleSegmentDescription
API Publication 4721Analytical Detection and Quantification Limits: Survey of State and Federal ApproachesGeneralSurvey of state and federal approaches to analytical detection and quantification limits
API 526Flanged Steel Pressure Relief ValvesUpstreamSpecification for flanged steel pressure relief valves
API 620Design and Construction of Large, Welded, Low-Pressure Storage TanksDownstreamDesign and construction standards for large welded low-pressure storage tanks
API RP 1007Loading and Unloading of MC 306 / DOT 406 Cargo Tank Motor VehiclesPipelineRecommended practice for loading and unloading cargo tank motor vehicles
ANSI/API 1104Welding of Pipelines and Related FacilitiesPipelineWelding standards for pipelines and related facilities
API 650Welded Steel Tanks for Oil StorageDownstreamDesign, manufacture, erection, and inspection of welded steel tanks for oil storage
API 653Tank Inspection, Repair, Alteration, and ReconstructionDownstreamProcedures for inspection, repair, alteration, and reconstruction of storage tanks
API 5LSpecification for Line PipePipelineSpecification for seamless and welded steel line pipe
API SPEC 6ASpecification for Wellhead and Christmas Tree EquipmentUpstreamSpecification for wellhead and Christmas tree equipment
API 5CTSpecification for Casing and Tubing (U.S. Customary Units)UpstreamSpecification for casing and tubing in U.S. customary units
API RP 7GRecommended Practice for Drill Stem Design and Operation LimitsUpstreamRecommended practice for drill stem design and operation limits