Which Chinese oil refiners are specifically targeted by the US sanctions warning, and why?

The US Treasury Department specifically warned independent (private) oil refiners in China — mainly located in Shandong province — of sanctions risks due to their role in importing and processing Iranian oil; these smaller private processors, often called 'teapots', have been Tehran’s most important consumers because they take advantage of discounted Iranian crude, unlike China’s state-owned entities which generally avoid blacklisted oil. The warning followed last week’s sanctions on Hengli Petrochemical (Dalian) Refinery Co., one of China’s largest private refiners in Liaoning province, explicitly cited for purchasing Iranian oil.

What specific actions did the US Treasury Department demand from financial institutions regarding Chinese refiners’ dealings with Iran?

The US Treasury Department urged financial institutions to avoid facilitating transactions involving Chinese refiners that import Iranian crude, to conduct enhanced due diligence, and to communicate clearly with correspondent banks; it also stated it is leveraging 'the full range of available tools and authorities' and is prepared to deploy secondary sanctions against foreign financial institutions that continue to support Iran’s activities.

US Warns of Sanctions Risks for Chinese Refiners of Iranian Oil

Apr 28, 2026

The US Treasury warned financial institutions against facilitating transactions with Chinese refiners importing Iranian oil, citing secondary sanction risks. The move impacts private processors in Shandong and follows recent sanctions on Hengli Petrochemical.

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