South Korea will likely return to a familiar game plan to replace Iranian oil it will no longer have access to after May, now that the US intends to tighten sanctions on Iranian exports. South Korea is the biggest buyer of Iranian condensate, an ultra-light oil prized by the country’s refiners as a raw material for petrochemicals manufacturing. SK Incheon Petrochem, Hyundai Oilbank and Hanwha Total Petrochemical are set to once again scan the world for alternative, but more expensive, condensate supplies and snap up heavy naphtha oil products for their processing units, known as splitters, industry sources and analysts said. Last year, South Korea bought and tested as many as 23 different types of condensate from 15 countries as possible substitutes for Iranian condensate, at a cost of about $9 billion, government and trade data analyzed by Thomson Reuters showed. South Korean petrochemical makers bought condensate from gas fields in Africa and Europe and even picked up an obscure cargo from Tunisia, in addition to tapping more supplies from Qatar, Saudi Arabia, the US and Australia. South Korean splitters are designed to process condensate from Qatar and Iran which are low in sulfur and produce no residue. “Those who can bear the cost would make investments and switch their import sources, those who can’t have to bite the bullet and use Qatari condensate,” said Kim Jae-kyung, research fellow at the Korea Energy Economics Institute. This year South Korean refiners did not have to hunt as they made full use of the Iranian oil volumes allowed under the US waivers by importing only Iranian condensate. Those waivers will expire on May 1. South Korea is on track to import about 249,000 barrels per day (bpd) of Iranian South Pars condensate by the end of April, 70 percent of the total volume of condensate it imported last year, the data showed, much more than it needs in the first half of 2019. The country’s condensate demand has also fallen in the first half of this year as refiners cut runs at splitters on poor naphtha margins and as Hanwha Total shut a splitter for maintenance, the sources said. SK and Hanwha Total may replace condensates by buying more heavy naphtha, a raw material for petrochemicals. Low naphtha prices could help repeat a spike in imports that happened in late 2018. Hanwha Total, which operates two condensate splitters, last year raised its monthly average imports of heavy naphtha to 400,000 tons from 250,000 tons in the absence of Iranian condensate. Spot premiums of the fuel rose to multi-year highs last year after South Korea imported a record 20 million barrels of naphtha in December. “Stronger demand for heavy full-range naphtha should happen although it could happen at a lesser extent versus last year because refineries in general are using more light crude. Buyers in South Korea may also have gotten some alternative condensates to Iranian grades,” said an industry source who tracks both markets. To help refiners source alternative supplies, the South Korean government plans to extend freight rebates for shipments of non-Middle East crude to the end of 2021, South Korea’s energy ministry said on its website in mid-April.