Knowledge of the “9 days work, 5 days off” schedule in petrochemical engineering

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““Nine completions”: 1. The project is completed in accordance with the specifications outlined in the design documents； 2. The preliminary assessment of the project quality is satisfactory ； 3. The heating furnace (including waste heat recovery) has been installed; the furnace tubes have passed the pressure test, heat treatment, and non-destructive testing, and furnace drying is complete ； 4. The process pipelines have passed the pressure test, physical and chemical tests, heat treatment, and non-destructive testing; the system has been cleaned, purged, and verified to be airtight ； 5. Insulation, corrosion prevention, and fire protection work are basically completed ； 6. The strength tests, non-destructive testing, and heat treatment of the static equipment assembled on-site have been completed successfully; the internal components of the static equipment towers have been installed, the access panels have been cleaned and sealed, the packing for the packed towers has been installed, the internal components of the reactors have been installed and the catalysts have been filled in, and the internal components of the containers have been installed along with completion of cleaning and inspection tasks ； 7. The individual testing of the rotating equipment was successful ； Successful commissioning and calibration of large-scale units ； The electrical and instrumentation calibration of the device is successful ； 8. The temporary facilities for construction in the plant area have been removed, the road construction on site is complete, and the water supply and drainage works are finished ； 9. The “three inspections and four determinations” items that affect the joint commissioning, as well as design changes, have been resolved; responsibilities for all other outstanding items are clear, along with their respective completion dates. “\"Five Handovers\": Verification and handover of the actual quantities of the project in accordance with the design drawings ； Review, verification, and handover of preliminary project quality assessment documents and relevant commissioning records ； Handover of specialized tools, instruments, equipment, as well as spare parts and supplies for construction and installation purposes ； Final project tasks settlement and confirmation of completion time ； Transfer of random technical documents.