On July 14, 2026, Tongli obtained the API 6A certificate issued by the American Petroleum Institute (API)!
As the authoritative certification body for the global oil and gas industry, the American Petroleum Institute (API) has established strict and comprehensive audit standards for enterprises. From March 23 to March 27, 2026, API dispatched experienced and professional auditors to conduct a thorough and meticulous evaluation of Tongli. After a rigorous 5-day audit, Tongli successfully passed the certification and obtained the API 6A certification certificate on July 14th.
API 6A Certification Details
Effective Date：14-Jul-2026 Expiration Date：14-Jul-2029
Monogram API-6A Wellhead and Tree Equipment
Casing and Tubing Heads
Maximum PSL：PSL 1, PSL 2, PSL 3
Mandrel-Type Hangers
Maximum PSL：PSL 1, PSL 2, PSL 3
Cross-Over Connectors
Maximum PSL：PSL 1, PSL 2, PSL 3
Top Connectors
Maximum PSL：PSL 1, PSL 2, PSL 3
Tees and Crosses
Maximum PSL：PSL 1, PSL 2, PSL 3
Adapter Spools and Spacer Spools
Maximum PSL：PSL 1, PSL 2, PSL 3
Blind and Test Flanges
Maximum PSL：PSL 1, PSL 2, PSL 3
Gate, Ball, Plug Valves
Maximum PSL：PSL 1, PSL 2, PSL 3
Chokes
Maximum PSL：PSL 1, PSL 2, PSL 3
