Maintenance Schedule 2021–2026 (Unit: Days)
| Enterprise Name | Maintenance Period | Duration (Days) | Remarks |
|---|---|---|---|
| Maoming Petrochemical | Mar 25 – May 5, 2021 | 40 | |
| Fushun Petrochemical | Apr 5 – May 19, 2021 | 44 | Originally scheduled for April 10; advanced to April 5. |
| Jilin Petrochemical | Jun 4 – Jul 22, 2021 | 48 | |
| Shanghai Petrochemical | Apr 15 – Jun 20, 2021 | 65 | Maintenance of the 400 kt/a large ethylene unit. |
| Panjin Ethylene | Jul 15 – Sep 2, 2021 | 48 | |
| Qilu Petrochemical | Aug 4 – Sep 23, 2021 | 50 | |
| Yangzi Petrochemical | Started May 23, 2021 | 14 | Originally planned for March maintenance, postponed to H2. Maintenance involved one legacy 400 kt/a ethylene unit; only one ethylene train was shut down. |
| Yanshan Petrochemical | Mar 25 – May 19, 2021 | 54 | |
| Zhenhai Refining & Chemical | May 18 – Jun 2, 2021 | 15 | Originally planned for April 6 maintenance, postponed to mid-May. |
| CNOOC Shell Phase I | Dec 2021 | 30 | |
| Xinjiang Tianli | Oct 27, 2021 | 30 | As the large ethylene unit had already been shut down early for maintenance, Tianli Co. also ceased operations for maintenance accordingly. |
| Sinochem Quanzhou | Dec 1, 2021 – Jan 20, 2022 | 50 | |
| Yangzi Petrochemical | Mar 15 – May 25, 2022 | 70 | Unit 2 (400 kt/a ethylene) entered maintenance on Mar 15 and restarted on May 25. Unit 1 (400 kt/a ethylene) shut down on Mar 28, with planned maintenance until May 31. |
| Maoming Petrochemical | Apr 30, 2022 | - | Restarted on Aug 7. |
| May 7, 2022 | |||
| Shanghai Petrochemical | Jun 18 – Aug 20, 2022 | - | The 300 kt/a Unit #2 ethylene plant restarted on Aug 20. After stabilization, the 400 kt/a Unit #1 ethylene plant was restarted. |
| Dushanzi Petrochemical | Jul 2, 2022 | 10 | The large ethylene unit at Dushanzi Petrochemical shut down on Jul 2 due to a cold box leak, undergoing emergency repairs for approximately 10 days. |
| Qilu Petrochemical | Jul 20 – Aug 2, 2022 | 13 | Maintenance began on Jul 20, with full shutdown achieved by Jul 23. Feedstock introduction resumed on Aug 2 after maintenance completion; ethylene pyrolysis fuel oil production started on Aug 3–4. |
| Hengli Petrochemical | Aug 1 – Aug 21, 2022 | 20 | |
| Hengli Petrochemical | Sep 13 – Sep 22, 2022 | 10 | The 1,500 kt/a ethylene cracker shut down on Sep 13; maintenance expected to last 7–10 days. |
| Gulei Petrochemical | Sep 14 – Oct 10, 2022 | 25 | The 1,000 kt/a ethylene unit underwent brief shutdown for maintenance starting Sep 14. |
| Zhejiang Petrochemical Phase II Train 2 | Feb 15 – Mar 10, 2023 | 23 | - |
| Zhenhai Refining & Chemical | Feb 26 – May 15, 2023 | 84 | Restarted on May 15. |
| Liaoyang Petrochemical | Apr 7 – End of May 2023 (Est.) | - | - |
| Zhejiang Petrochemical | May 10 – Jun 30, 2023 | 50 | - |
| Shanghai SECCO | May 20 – Jul 21, 2023 | - | Maintenance ended on Jul 21. |
| Lanzhou Petrochemical | Started Jun 6, 2023 | Planned 60 days | |
| Daqing Petrochemical | Jun 10 – Jul 20, 2023 | 40 | Daqing Petrochemical: Jun 10–Jul 20; Huake: Jun 12–Jul 30. |
| Zhongke Refining & Chemical | Jul 13 – Jul 27, 2023 | 14 | Restarted on Jul 27. |
| CNOOC Shell | Jul 17 – Jul 27, 2023 | 10 | Restarted on Jul 27. |
| Baolai Petrochemical | Jul 31 – Sep 24, 2023 | 55 | Restarted on Sep 24. |
| BASF-YPC | Sep 5 – Sep 25, 2023 | 20 | Product output resumed on Sep 25. |
| Sichuan Petrochemical | Sep 15 – Nov 15, 2023 | 60 | |
| Shanghai Petrochemical | Started Sep 25, 2023 | -- | Small ethylene unit. |
| Zhenhai Refining & Chemical | Oct 16 – Nov 2, 2023 | 18 | Restarted on Nov 2. |
| CNOOC Shell Phase II | Oct 20 – Dec 10, 2023 | 50 | |
| Guangzhou Petrochemical | Oct 13 – Nov 8, 2023 | 26 | |
| Maoming Petrochemical | Dec 24, 2023 – Mar 15, 2024 | 82 | Cracker Unit No. 1. |
| Shanghai SECCO | Dec 4 – Dec 11, 2023 | 7 | |
| Qilu Petrochemical | Started Dec 23, 2023 | ||
| Baolai Petrochemical | Dec 27, 2023 – Jan 4, 2024 | Est. 10 days | |
| Guangzhou Petrochemical | Dec 30, 2023 – Jan 13, 2024 | 14 | |
| Sino-Korean Petrochemical | Jan 16 – Jan 26, 2024 | Est. 1 week | |
| BASF-YPC | Jan 25 – Jan 30, 2024 | ||
| Zhongke Refining & Chemical | Mar 19 – May 29, 2024 | 70 | |
| Zhejiang Petrochemical | Mar 5–22 / Apr 2–30, 2024 | Alternating maintenance of two units. | |
| Zhongyuan Ethylene | Early Apr – May 15, 2024 | Restarted May 15 | |
| Xinjiang Tianli | May 15 – Jul 15, 2024 | 60 | |
| Zhejiang Petrochemical | Jun 14 – 25, 2024 | 10 | |
| Beifang Huajin | Jul 12 – Oct 8, 2024 | Approx. 80 days | |
| Dongming Petrochemical | Jul 5 – Aug 4, 2024 | 31 | |
| Jilin Petrochemical | Aug 20 – Oct 20, 2024 | 60 | |
| Fujian Union Petrochemical | Oct 5 – Dec 20, 2024 | 60 | |
| Sino-Korean Petrochemical | Oct 10, 2024 – Jan 8, 2025 | 90 | |
| BASF-YPC | Apr 8 – Jun 3, 2025 | 56 | Restarted on Jun 1; product output on Jun 4. |
| Sino-Saudi Tianjin | Apr 21 – Jun 6, 2025 | 46 | Restarted on Jun 6. |
| Hengli Petrochemical | May 13 – Jun 10, 2025 | 28 | Restarted on Jun 10. |
| Yanshan Petrochemical | May 25, 2025 – TBD | Long-term shutdown planned | |
| Fujian Union Petrochemical | Jun 5 – Jun 20, 2025 | 16 | |
| Zhejiang Petrochemical | Jun 23 – Aug 10, 2025 | 48 | Restarted on Aug 10. |
| Wanhua Chemical Phase II | May 13 – Jun 25, 2025 | 41 | |
| Dongming Petrochemical | Jul 28 – Sep 18, 2025 | 52 | Restarted on Sep 18. |
| Fushun Petrochemical | Aug 15 – Oct 28, 2025 | 74 | Restarted on Oct 28. |
| Zhenhai Refining & Chemical | Sep 27 – Nov 20, 2025 | 54 | Restarted on Nov 20. |
| Guangzhou Petrochemical | Oct 13 – Dec 8, 2025 | 56 | Restarted on Dec 8. |
| Zhongyuan Petrochemical | Oct 25, 2025 – TBD | TBD | |
| Maoming Petrochemical | Nov 26, 2025 – Jan 10, 2026 | 45 | One unit under maintenance. |
| Shanghai Petrochemical | Nov 25, 2025 – Jan 25, 2026 | 62 | Restarted on Jan 25. |
| Sinochem Quanzhou | Nov 25, 2025 – Jan 26, 2026 | 64 | Restarted on Jan 26. |
| Dongming Petrochemical | Dec 13 – Dec 24, 2025 | 11 | Restarted on Dec 24. |
| United Petrochemical | Jan 8 – Jan 19, 2026 | 11 | Restarted on Jan 19. |
| Gulei Petrochemical | Mar 9 – Jul 19, 2026 | 132 | Restarted on Jul 19. |
| CNOOC Shell | Mar 6 – Apr 30, 2026 | 55 | Restarted on Apr 30. |
| Yangzi Petrochemical | May 5 – Oct 1, 2026 | 148 | Shipment resumed on Oct 1. |
| Sino-Korean Petrochemical | Jun 4 – Jul 15, 2026 | 39 | Restarted on Jul 15. |
| Hainan Refining & Chemical | Jun 6 – Oct 20, 2026 | 136 | Restarted on Oct 20. |
| Shenghong Refining & Chemical | Jul 1 – Aug 17, 2026 | 48 | Restarted on Aug 17. |
| CNOOC Shell | Aug 31, 2026 – TBD | ||
| Wanhua Chemical | Oct 10, 2026 – TBD | Restart expected in mid-December. | |
| Source: Chempricehub Information |
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