- API RP 5A3 - Recommended Practice for Thread Compounds for Casing, Tubing, and Line Pipe
- API RP 5A5 - Recommended Practice for Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Petroleum and natural gas industries - Field inspection of new casing, tubing and plain-end drill pipe
- API Spec 5B - Specification for Threading, Gauging, and Thread Inspection of Casing, Tubing, and Line Pipe Threads
- API RP 5B1 - Recommended Practice for Threading, Gauging, and Thread Inspection of Casing, Tubing, and Line Pipe Threads
- API RP 5C1 - Recommended Practice for Care and Use of Casing and Tubing
- API Bull 5C2 - Bulletin for Performance Properties of Casing, Tubing, and Drill Pipe
- API Bull 5C3 - Bulletin for Formulas and Calculations for Casing, Tubing, Drill Pipe, and Line Pipe Properties
- API RP 5C5 - Recommended Practice for Procedures for Testing Casing and Tubing Connections
- API RP 5C6 - Recommended Practice for Welding Connections to Pipe
- API RP 5C7 - Recommended Practice for Coiled Tubing Operations in Oil and Gas Well Services
- API Spec 5CT - Specification for Casing and Tubing, Petroleum and natural gas industries - Steel pipes for use as casing or tubing for wells
- API Spec 5D - Specification for Drilling Pipe
- API Spec 5L - Specification for Line Pipe, Petroleum and natural gas industries - Steel pipe for pipeline transportation systems
- API RP 5L1 - Recommended Practice for Railroad Transportation of Line Pipe
- API RP 5L2 - Recommended Practice for Internal Coating of Line Pipe for Non-Corrosive Gas Transmission Service
- API RP 5L3 - Recommended Practice for Conducting Drop-weight Tear Tests on Line Pipe
- API RP 5L7 - Recommended Practice for Unprimed Internal Fusion Bonded Epoxy Coatng of Line Pine
- API RP 5L8 - Recommended Practice for Field Inspection of New Line Pipe
- API RP 5L9 - Recommended Practice for External Fusion Bonded Epoxy Coating of Line Pipe
- API Spec 5LC - Specification for CRA Line Pipe
- API Spec 5LCP - Specification for Coiled Line Pipe
- API Spec 5LD - Specification for CRA Clad of Lined Steel Pipe
- API RP 5LW - Recommended Practice for Transportation of Line Pipe on Barges and Marine Vessels
- API RP 5SI - Recommended Practice for Purchaser Representative Surveillance and/or Inspection at the Supplier
- API Std 5T1 - Standard for Imperfection Terminology
- API TR 5TRSR22 - Technical Report for SR22 Supplementary Requirements for Enhanced Leak Resistance LTC
- API RP 5UE - Recommended Practice for Ultrasonic Evaluation of Pipe Imperfections