American Petroleum Institute

API 6A

Specification for Wellhead and Tree Equipment

815 companies listed on Oilfield Index hold API 6A (Specification for Wellhead and Tree Equipment), issued by the American Petroleum Institute.

Categories these companies serve

Certified companies 815

“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.