Reuters:

Recent U.S. sanctions on two small Chinese refiners for buying Iranian oil have created difficulties receiving crude and led them to sell product under other names, sources familiar with the matter said, evidence of the disruption that Washington's stepped-up pressure is inflicting on Tehran's biggest oil buyer.

The targeting of independent refiners, known as teapots, marked an escalation in Washington's efforts to cut off Tehran's export revenue as President Donald Trump seeks to pressure Iran into a deal over its nuclear programme.

Washington's sanctions against Shandong Shouguang Luqing Petrochemical in March and Shandong Shengxing Chemical in April have also begun to deter other, larger independent Chinese refiners from buying Iranian crude, three of the sources said.

About five plants in the refining hub of Shandong province have halted purchases of Iranian oil since last month, worried about being hit by sanctions, two trading executives said. That wariness is the main reason discounts for Iranian Light have widened to $2.30-$2.40 a barrel against ICE Brent from about $2 a month ago, the executives and another source said.

Among the inconveniences faced by the two sanctioned teapots, state-run Shandong Port Group, the main port operator in the province, has denied entry to vessels loaded with crude they have purchased, five trade sources said. That follows the port group's January ban on port calls by U.S.-sanctioned tankers.

Shandong Port Group and Shengxing did not respond to requests for comment. A Luqing executive declined to comment.

Large state banks have also stopped providing Luqing with operational capital for purchasing crude, forcing it to work with smaller banks, four of the sources said.

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