Three more Chinese shipping companies and a pair of executives have been blacklisted by the US after they allegedly shipped petroleum products from Iran.

New Far International Logistics, Sino Energy Shipping and Zhihang Ship Management have all been hit with sanctions, along with Sino Energy executive Zuoyou Lin and New Far executive Min Shi.

Those five, plus Iranian Abadan Refining and UAE-based Chemtrans Petrochemicals Trading, were said to have been significantly involved with the Islamic republic's oil industry.

"Iran's petroleum industry is a major source of revenue for the Iranian regime and funds its malign activities throughout the Middle East," the US State Department said on Thursday.