Last week, ethylene prices gained in North East Asia, Korea and China while quoting stable in the Southeast Asian region, as per Chemweek.
An industry source in Asia, requesting to remain unidentified, informed a Polymerupdate team member, "Ethylene prices increased as market players noted constrained supply conditions. The increase was mainly due to the restricted supply of September shipments in Northeast Asia, along with continued plant maintenance activities in China that reduced regional production further. These elements restricted supply balances and helped boost prices, despite demand indicators staying stable. At the same time, prices in Southeast Asia remained steady as limited trading activity and careful purchasing maintained a range-bound market. In general, the variation shows supply-driven robust performance in Northeast Asia compared to subdued sentiment in Southeast Asia".
On Friday, FOB Korea ethylene prices were assessed at the USD 785-795/mt levels while FOB Japan ethylene prices were assessed at the USD 780-790/mt levels, both week on week higher by USD (+5/mt). CFR North East Asia ethylene prices were assessed at the USD 825-835/mt levels, up USD (+5/mt) from the previous week.
The source added, "Prices in Northeast Asia are anticipated to increase further in the upcoming months, as planned plant maintenance activities in South Korea in the fourth quarter is expected to constrain supply even more. This strengthens the anticipation of an optimistic perspective in the region. On August 20, it was announced that 10 petrochemical firms from South Korea have consented to reorganize their operational structure, which involves a considerable cutback in naphtha-cracking capacity, as stated by government authorities. This development may restrict feedstock availability for ethylene production even more, increasing upward pressure on regional prices".
The firms will jointly decrease their yearly naphtha-cracking capacity by 2.73.7 million metric tons. Market participants observed that although this action is anticipated to maintain ethylene prices steady in the short term, it is improbable to cause a significant price surge considering the current demand perspective. At the same time, the downstream effect on the Chinese polyethylene (PE) market is anticipated to be minimal, since South Korean PE imports to the nation are primarily restricted to specialized and premium grades. Consequently, the reorganization of South Korean naphtha-cracking activities is expected to have minimal impact on the overall supply-demand equilibrium for PE in China.
Meanwhile, CFR South East Asia ethylene prices were assessed steady at the USD 815-825/mt levels.
In plant news, Chiba Chemicals Chemical Ethylene Corp has restarted its cracker last weekend following a turnaround. Run rates at the cracker, which was shut for maintenance in mid-June 2025, have been normalized. Located in Chiba, Japan, the cracker has an ethylene production capacity of 612,000 mt/year and propylene production capacity of 330,000 mt/year.
In other plant news, Long Son Petrochemicals cracker has attained on-spec production following the resumption of operations around August 18, 2025. The cracker had been shut down in mid-October 2024 due to concerns over shrinking production margins and weakened demand. Located in Long Son, Vietnam, the cracker has an ethylene production capacity of 950,000 mt/year.
In another plant news, Formosa Petrochemical Corp (FPCC) will continue to keep its No.2 cracker off stream till end August 2025. The cracker was shut for maintenance in Q3 2025. Located in Mailiao, Taiwan, the No.2 cracker has an ethylene production capacity of 1.035 million mt/year.
mrchub.com