American Petroleum Institute

API 5B

Specification for Threading, Gauging, and Thread Inspection of Casing, Tubing, and Line Pipe Threads

464 companies listed on Oilfield Index hold API 5B (Specification for Threading, Gauging, and Thread Inspection of Casing, Tubing, and Line Pipe Threads), issued by the American Petroleum Institute.

Categories these companies serve

Certified companies 464

“API Composite List” means the company holds an active licence for this specification on the American Petroleum Institute’s public Composite List; “claimed by vendor” means the company lists it and the list does not confirm it. Certificate files are available to signed-in members. Claim your listing to keep yours current.