2021–2026 Maintenance Schedule (Unit: days)
| Company | Maintenance Period | Duration (days) | Remarks |
|---|---|---|---|
| Maoming Petrochemical | Mar 25–May 5, 2021 | 40 | |
| Fushun Petrochemical | Apr 5–May 19, 2021 | 44 | Originally planned for Apr 10; brought forward to Apr 5. |
| Jilin Petrochemical | Jun 4–Jul 22, 2021 | 48 | |
| Shanghai Petrochemical | Apr 15–Jun 20, 2021 | 65 | Overhaul of the 400 kt/y large ethylene unit. |
| Panjin Ethylene | Jul 15–Sep 2, 2021 | 48 | |
| Qilu Petrochemical | Aug 4–Sep 23, 2021 | 50 | |
| Yangzi Petrochemical | From May 23, 2021 | 14 | Originally scheduled for March, the overhaul was postponed to H2. It covered one 400 kt/y ethylene unit in the old production area, with only that single ethylene unit shut down. |
| Yanshan Petrochemical | Mar 25–May 19, 2021 | 54 | |
| Zhenhai Refining & Chemical | May 18–Jun 2, 2021 | 15 | The overhaul, originally planned for Apr 6, was postponed to mid-May. |
| CNOOC Shell Petrochemicals Phase I | From Jul 13, 2021* | 30 | |
| Xinjiang Tianli | From Oct 27, 2021 | 30 | As the large ethylene unit had already been shut down ahead of schedule for maintenance, Tianli Co. also shut down for maintenance. |
| Sinochem Quanzhou | Dec 1, 2021–Jan 20, 2022 | 50 | |
| Yangzi Petrochemical | Mar 15–May 25, 2022 | 70 | The No. 2 ethylene unit (400 kt/y) entered overhaul on Mar 15 and was restarted on May 25. The No. 1 ethylene unit (400 kt/y) was shut down on Mar 28 for planned maintenance until May 31. |
| Maoming Petrochemical | Apr 30 and May 7, 2022 | — | Restarted on Aug 7. |
| Shanghai Petrochemical | Jun 18–Aug 20, 2022 | — | The No. 2 ethylene unit (300 kt/y) was restarted on Aug 20; after stable operation, the No. 1 ethylene unit (400 kt/y) was restarted. |
| Dushanzi Petrochemical | From Jul 2, 2022 | 10 | The large ethylene complex was shut down on Jul 2 due to a cold box leak; emergency repair lasted about 10 days. |
| Qilu Petrochemical | Jul 20–Aug 2, 2022 | 13 | Qilu's ethylene overhaul began on Jul 20, with full shutdown on Jul 23. Maintenance ended and feedstock feeding resumed on Aug 2; ethylene tar was produced on Aug 3–4. |
| Hengli Petrochemical | Aug 1–21, 2022 | 20 | |
| Hengli Petrochemical | Sep 13–22, 2022 | 10 | The 1.5 Mt/y ethylene cracker was shut down on Sep 13; the overhaul was expected to last 7–10 days. |
| Gulei Petrochemical | Sep 14–Oct 10, 2022 | 25 | The 1 Mt/y ethylene unit was taken offline for a short overhaul starting Sep 14. |
| Zhejiang Petrochemical (Phase II, second line) | Feb 15–Mar 10, 2023 | 23 | — |
| Zhenhai Refining & Chemical | Feb 26–May 15, 2023 | 84 | Restarted on May 15. |
| Liaoyang Petrochemical | Apr 7–late May 2023 (est.) | — | — |
| Zhejiang Petrochemical | May 10–Jun 30, 2023 | 50 | — |
| Shanghai SECCO | May 20–Jul 21, 2023 | — | Overhaul completed on Jul 21. |
| Lanzhou Petrochemical | From Jun 6, 2023 | Planned 60 days | |
| Daqing Petrochemical | Jun 10–Jul 20, 2023 | 40 | Daqing Petrochemical was off line Jun 10–Jul 20; Huake was off line Jun 12–Jul 30. |
| Zhongke Refining & Petrochemical | Jul 13–27, 2023 | 14 | Started up on Jul 27. |
| CNOOC Shell Petrochemicals | Jul 17–27, 2023 | 10 | Started up on Jul 27. |
| Bora Petrochemical | Jul 31–Sep 24, 2023 | 55 | Started up on Sep 24. |
| Yangzi-BASF Petrochemical | Sep 5–25, 2023 | 20 | Began producing products on Sep 25. |
| Sichuan Petrochemical | Sep 15–Nov 15, 2023 | 60 | |
| Shanghai Petrochemical | From Sep 25, 2023 | — | Shanghai Petrochemical small ethylene unit. |
| Zhenhai Refining & Chemical | Oct 16–Nov 2, 2023 | 18 | Restarted on Nov 2. |
| CNOOC Shell Petrochemicals 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 | No. 1 cracker. |
| Shanghai SECCO | Dec 4–11, 2023 | 7 | |
| Qilu Petrochemical | From Dec 23, 2023 | ||
| Bora Petrochemical | Dec 27, 2023–Jan 4, 2024 | 10 (est.) | |
| Guangzhou Petrochemical | Dec 30, 2023–Jan 13, 2024 | 14 | |
| Sinopec-SK (Wuhan) Petrochemical | Jan 16–26, 2024 | About 1 week (est.) | |
| Yangzi-BASF Petrochemical | Jan 25–30, 2024 | ||
| Zhongke Refining & Petrochemical | Mar 19–May 29, 2024 | 70 | |
| Zhejiang Petrochemical | Mar 5–22 & Apr 2–30, 2024 | — | The two units were overhauled on a rotating basis. |
| Zhongyuan Ethylene | Early Apr–May 15, 2024 | — | Started up on May 15. |
| Xinjiang Tianli | May 15–Jul 15, 2024 | 60 | |
| Zhejiang Petrochemical | Jun 14–25, 2024 | 10 | |
| North Huajin Chemical | Jul 12–Oct 8, 2024 | About 80 days | |
| Dongming Petrochemical | Jul 5–Aug 4, 2024 | 31 | |
| Jilin Petrochemical | Aug 20–Oct 20, 2024 | 60 | |
| Fujian Refining & Petrochemical | Oct 5–Dec 20, 2024 | 60 | |
| Sinopec-SK (Wuhan) Petrochemical | Oct 10, 2024–Jan 8, 2025 | 90 | |
| Yangzi-BASF Petrochemical | Apr 8–Jun 3, 2025 | 56 | Started up on Jun 1; began producing products on Jun 4. |
| Sinopec SABIC Tianjin Petrochemical | 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 | Planned long-term shutdown | |
| Fujian Refining & Petrochemical | Jun 5–20, 2025 | 16 | |
| Zhejiang Petrochemical | Jun 23–Aug 10, 2025 | 48 | Restarted on Aug 10. |
| Wanhua Chemical (Yantai), Phase II | May 13–Jun 25, 2025 | 41 | |
| Dongming Petrochemical | Jul 28–Sep 18, 2025 | 52 | Started up on Sep 18. |
| Fushun Petrochemical | Aug 15–Oct 28, 2025 | 74 | Started up on Oct 28. |
| Zhenhai Refining & Chemical | Sep 27–Nov 20, 2025 | 54 | Started up 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 | Overhaul of one unit. |
| Shanghai Petrochemical | Nov 25, 2025–Jan 25, 2026 | 62 | Restarted on Jan 25, 2026. |
| Sinochem Quanzhou | Nov 25, 2025–Jan 26, 2026 | 64 | Restarted on Jan 26, 2026. |
| Dongming Petrochemical | Dec 13–24, 2025 | 11 | Restarted on Dec 24. |
| Lianhe Petrochemical | Jan 8–19, 2026 | 11 | Restarted on Jan 19, 2026. |
| Gulei Petrochemical | Mar 9–Jul 19, 2026 | 132 | Restarted on Jul 19, 2026. |
| CNOOC Shell Petrochemicals | Mar 6–Apr 30, 2026 | 55 | Restarted on Apr 30, 2026. |
| Yangzi Petrochemical | May 5, 2026–TBD | — | Planned restart in August 2026. |
| Sinopec-SK (Wuhan) Petrochemical | Jun 4–Jul 15, 2026 | 39 | Restarted on Jul 15, 2026. |
| Hainan Refining & Chemical | Jun 6, 2026–TBD | 3–4 months | Planned shutdown of 3–4 months. |
| Shenghong Refining & Chemical | Jul 1–Aug 17, 2026 | 48 | Restarted on Aug 17, 2026. |
| CNOOC Shell Petrochemicals | Aug 31, 2026–TBD |
*The original Chinese entry for CNOOC Shell Petrochemicals Phase I reads "July 13, 1905," which appears to be a typo; it has been translated as July 13, 2021 based on the 2021–2026 scope of the table.
Source: Chempricehub News
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