US Sanctions Chinese Refinery for Purchasing Iranian Oil

• Hengli Petrochemical is one of Iran's largest crude oil customers; China purchases over 80% of Iran's shipped oil according to 2025 Kpler data
• Independent 'teapot' refineries account for roughly a quarter of Chinese refinery capacity and are somewhat immune to U.S. sanctions due to minimal exposure to the U.S. financial system
• Iranian oil now trades at premiums to Brent prices as teapot refiners face increased competition after the U.S. issued temporary sanctions waivers that could allow India to purchase more Iranian crude

Summary: US Sanctions Chinese Refinery for Purchasing Iranian Oil

Key Actions:

The Trump administration imposed sanctions on April 24 against Hengli Petrochemical (Dalian) Refinery Co., one of Iran's largest crude oil customers, for purchasing billions of dollars' worth of Iranian oil. Approximately 40 shipping companies and vessels operating as part of Iran's shadow fleet were also sanctioned.

Market Context:

This follows previous sanctions targeting Chinese "teapot" refineries Shandong Shouguang Luqing Petrochemical and Shandong Shengxing Chemical. Teapot refineries represent roughly 25% of Chinese refinery capacity and have faced pressure from narrow or negative margins and weak domestic demand. China purchases over 80% of Iran's shipped oil, according to 2025 Kpler data.

Limited Effectiveness:

Sanctions experts note that independent Chinese refineries have minimal exposure to the U.S. financial system, making them somewhat immune to sanctions' full impact. Targeting Chinese banks facilitating these purchases would prove more effective. Previous sanctions created operational hurdles, including difficulties receiving crude and forcing refiners to sell products under different names.

Market Impact:

Recent developments have forced teapot refiners to purchase Iranian oil at premiums to international Brent prices, following Washington's temporary waiver of sanctions on Iranian oil at sea, which raised expectations of increased Indian purchases.

Official Statement:

Treasury Secretary Scott Bessent emphasized the U.S. is imposing a "financial stranglehold" on Iran and will continue targeting the network facilitating Iranian oil exports.

Strategic Objective:

The sanctions aim to restrict Iran's oil exports as Washington and Tehran struggle to restart peace talks.