Regulations on Special Maintenance Management for the Operation of Large-scale Units in Refining and Chemical Enterprises

Below is the 2012 version of our company’s regulations: Provisions on the Management of Large-scale Units. Chapter 1: General Provisions. Article 1: These provisions are formulated in order to strengthen the management of large-scale units in the branch companies, improve the level of management of such units, and ensure safe, stable, and long-term operation of the facilities. They are based on relevant laws and regulations, as well as the Group Company’s “Provisions on Equipment Management (Trial)” and the Shareholding Company’s “Provisions on Equipment Management (Trial)” (hereinafter referred to as the “Provisions on Equipment Management (Trial)”). Article 2: These provisions apply to the management of large-scale units in joint-stock companies; the management of other units may refer to them. Article 3: The term “large-scale units” as used in these provisions refers to units that, based on actual production conditions and upon thorough consideration, are designated as falling under the scope of management for critical equipment. Article 4: To strengthen the management of large-scale power units, it is necessary to rely on technological progress, adhering to the principles of \"combining design, manufacturing, and operation; combining maintenance and repair; combining restoration, renovation, and upgrading; combining professional management with grassroots management; and combining technical management with economic management.\" Chapter 2 Management Responsibilities Article 5: The deputy manager in charge of equipment management is responsible for the overall management of large-scale generating units, in accordance with the management requirements and responsibilities stipulated in the Group Company’s and the Joint Stock Company’s \"Equipment Management Measures\" (provisional version). Article 6: Responsibilities of the Mechanical Operations Department. It is responsible for the centralized management of large-scale equipment, implementing the management systems, regulations, rules, and standards pertaining to large-scale equipment set forth by the Group Company and the Joint Stock Company. It also bears the responsibility of formulating relevant systems and detailed implementation rules for the management of large-scale equipment. (1) Responsible for or involved in the selection, design review, manufacturing supervision, installation, commissioning, and acceptance of large-scale units. (II) Responsible for the technical analysis of the operating conditions of large-scale units, as well as for conducting condition monitoring, fault diagnosis, and technical problem-solving for such units. (III) Organize the special-grade maintenance management for large-scale units. (IV) Establish and improve technical management records, reports, and other materials related to large-scale unit equipment; prepare summaries of the work related to such units, and organize regular inspections and evaluations. (5) Organize the formulation and review of maintenance procedures for large-scale units; participate in the review of operating procedures ； Responsible for preparing maintenance plans for large-scale units, approving the maintenance procedures, and overseeing process control and quality inspection. (6) Formulate and review plans and schemes for the renewal and renovation of large-scale units, organize their implementation, and ensure proper process control and acceptance. (7) Be responsible for the technical management of spare parts for large-scale units, and organize the preparation and approval of spare parts plans. (8) Be responsible for the promotion and application of new technologies, new processes, new materials, and new equipment in large-scale units, in order to continuously improve the equipment and technical standards of such units. (IX) Organize accident investigations and analyses of large-scale units and participate in accident handling. Article 7: Responsibilities of the Production Department (1) Participate in the selection, renovation, and design review of large-scale units. (II) Participate in the mechanical operation tests and acceptance of large-scale units, and organize the joint commissioning and performance evaluation of such units. (III) Organize the formulation and review of technical documents such as operating procedures, process standards, and accident response plans for large-scale units. (4) Responsible for the operation management of large-scale units, ensuring that they operate under specified process and technical conditions. (5) Participate in the investigation, analysis, and handling of accidents involving large-scale units. Article 8: Responsibilities of the Safety Department (1) Responsible for safety supervision throughout the entire management process of large-scale units. (II) Participate in the review of major overhaul and renovation plans for large-scale units. (III) Responsible for inspecting various safety measures of large-scale units, and organizing investigations, analyses, and handling of accidents involving such units. Article 9: Responsibilities of the Supply Department (1) Responsible for reviewing the qualifications of suppliers for large-scale units. (II) Responsible for the supervision of manufacturing and factory inspection of large-scale units. (III) Provide equipment or accessories, along with relevant technical documents, in a timely manner, with guaranteed quality and quantity, in accordance with the procurement plan. (4) Responsible for the acceptance of large-scale units and spare parts, and for keeping acceptance records. Inventory equipment and accessories should be stored as required and kept properly. (5) Responsible for handling any issues that arise during the procurement process. Article 10: Responsibilities of the User Unit (1) Be responsible for the use, maintenance, and management of the large-scale units within the unit, carry out thorough maintenance on these units, operate them in strict accordance with technical specifications, and ensure their safe, stable, and long-term operation. (II) Establish and improve equipment technical records, reports, and other relevant documents for large-scale units ； Responsible for preparing technical documents such as operating procedures, process standards, and emergency response plans for large-scale units, and submitting them for approval. (3) Responsible for carrying out regular analyses of the quality of oil products used by the units, and for archiving the analysis reports. (IV) Responsible for preparing plans for the maintenance, renewal, and renovation of large-scale units, and submitting them to the competent authorities ； Participate in the implementation and acceptance of maintenance, renewal, and retrofitting of large-scale units. (5) Actively carry out condition monitoring and fault diagnosis of large-scale units, identify equipment defects in a timely manner and implement corrective measures to reduce unplanned shutdowns. (VI) Participate in the investigation, analysis, and handling of accidents involving large-scale power units, and formulate accident prevention measures to implement them. (7) Participate in the selection, design review, trial operation, and acceptance of large-scale units. (8) Be responsible for the technical training and assessment of relevant personnel in the unit, so as to continuously improve the technical skills of those working in management, operation, and maintenance roles. Article 11: Responsibilities of the Maintenance Unit (1) Responsible for the maintenance and management of the large-scale units at the branch office, and carrying out top-level maintenance work on these units. (II) Establish and improve the equipment and technical documentation, spare parts records, as well as maintenance logs for large-scale units ； Responsible for preparing technical documents such as maintenance procedures, maintenance plans, and spare parts schedules for large-scale units, and submitting them for approval. (III) Be responsible for or participate in the implementation and acceptance of the installation, maintenance, upgrading, and renovation of large-scale units. (IV) Participate in the investigation, analysis, and handling of accidents involving large-scale units, formulate corrective measures, and organize their implementation. (5) Participate in the selection, design review, trial operation, and acceptance of large-scale units. (VI) Actively participate in the condition monitoring and fault diagnosis of large-scale units. (7) Responsible for the technical training and assessment of relevant personnel within the unit, continuously improving the technical capabilities of staff in management, inspection, and maintenance. Article 12: The Quality Center is responsible for analyzing the quality of lubricants used in large-scale machinery and issuing analysis reports. Chapter 3 Design and Selection of Large-scale Units Article 13: The design unit shall, in accordance with the technical requirements of the production process, provide the enterprise and manufacturers with technical data for the selection of large-scale units after conducting design calculations, so as to enable preliminary selection. Article 14: The preliminary design plans and drawings prepared by the manufacturer must undergo a tripartite design review involving the manufacturer, the design agency, and the enterprise before they can be used for manufacturing. Article 15: The design and selection of large-scale units shall comply with the latest versions of relevant technical standards and specifications. Taking into account the flammable and explosive nature of operations in the petroleum refining and chemical industries, units that are reliable in operation, offer great flexibility in handling, have a rational structure, high efficiency, and are easy to maintain should be chosen, so as to meet the requirements of low life-cycle costs, high overall equipment efficiency, and high safety and reliability. Article 16: Large-scale units must be equipped with comprehensive control systems, interlock protection systems, real-time monitoring instruments, and condition monitoring systems. Chapter 4: Supervision of Manufacturing and Factory Inspection of Large-scale Units Article 17: The manufacturer selected for producing the units must be one with a good track record, excellent reputation, high-quality service, advanced design and manufacturing capabilities, as well as compliance with relevant international standard certification systems. The models manufactured must meet **environmental protection standards and energy-saving requirements. Article 18: The manufacturer must carry out design, manufacturing, and testing in accordance with the technical agreement; any changes must be approved by all parties involved in the design, manufacturing, and management processes. Article 19: During the manufacturing process of large-scale units, the Supply Department shall engage a supervision unit with the appropriate qualifications to conduct supervision at the manufacturing plant. Article 20: Before large-scale units leave the factory, the Supply Department shall organize relevant technical personnel to conduct quality inspections in accordance with the technical agreement. Chapter 5: Installation, Commissioning, and Acceptance of Large-scale Units Article 21: The entity responsible for the installation of large-scale units must be one with a good track record, excellent reputation, high-quality service, as well as the appropriate qualifications and capabilities for equipment installation. Article 22: Before the installation of large-scale units and auxiliary equipment, the manufacturer must provide complete technical documentation in accordance with the technical agreement sowie relevant technical standards and specifications (which should include at least the factory certificate of conformity and inspection records, the general assembly drawings of the unit, installation drawings and related diagrams, the packing list and detailed list of components, as well as other technical information related to the unit and its auxiliary equipment). Article 23: Before the installation of large-scale units, the manufacturer, supply department, mechanical department, and installation unit must jointly participate in the unpacking inspection. Article 24: The installation unit must prepare an installation plan for large-scale units in accordance with relevant standards and specifications. Installation may only proceed after it has been reviewed by the Machinery Department, as well as the design and supervision units. The manufacturer shall provide technical guidance and assist in resolving any issues that arise during the installation process. Article 25: The on-site supervision unit must supervise the entire installation process in accordance with the provisions of the supervision contract and the requirements outlined in the installation plan. Article 26: Upon completion of the installation of large-scale units, the installing unit must, within the stipulated time frame, provide the Machinery Division with complete as-built documentation, special tools, and accompanying accessories. Article 27: To comprehensively evaluate the mechanical operation performance, process technical performance, and control performance of large-scale units, trial runs should be conducted on them after installation is completed. Based on the actual circumstances and relevant contract provisions, the entity responsible for the commissioning of large-scale units is determined, and a corresponding commissioning team is established. This team prepares the commissioning plan, which is then reviewed jointly by the design and manufacturing manufacturers, the production department, the technical department, the logistics department, and other relevant units. Article 28: After trial operation, large-scale units must meet at least the following conditions before they can be accepted: (1) They must operate continuously for no less than 72 hours under rated conditions. (II) The technical performance meets the design requirements and can fully satisfy production needs. (III) The control system and monitoring system are operating well, with all adjustment mechanisms responding quickly, flexibly, and accurately. (IV) There are complete and accurate test run records. Chapter 6 Operation Management of Large-scale Units Article 29: The commissioning of large-scale units must be carried out only after being inspected and approved by the Machinery Department as well as relevant departments such as production, technology, and safety. The startup of the unit must be carried out in strict accordance with the approval procedure (except for emergency startups as specified in the operating procedures). The persons responsible for approval must be present until the unit is operating normally; this approval process is organized by the unit’s operating entity and the relevant records are kept on file ； The co-signing units include the Safety Department, the Mobility Department, the Production Department, the user units, as well as the instrumentation, electrical engineering, and maintenance teams. Article 30: Operators and maintenance personnel must undergo technical training and pass relevant assessments before they can take up their posts and obtain the necessary qualifications. Article 31: The operating unit shall formulate operating procedures for large-scale units, organize relevant personnel to study them carefully, and ensure that these procedures are strictly followed. It is strictly prohibited to operate the units under conditions of overheating, overpressure, overload, excessive vibration, or high speed. Article 32: Operators must strictly implement the routine inspection system, checking various parts of large-scale units in accordance with the prescribed inspection routes, contents, and standards. They should identify problems, potential hazards, and unsafe factors promptly, and carefully fill out operation records, defect records, and daily operation logs. Article 33: When operators detect abnormal operation of large-scale units, they shall immediately investigate the cause, take corrective measures, and report it in a timely manner. To ensure the safety of the equipment and personnel, in emergency situations, operators have the authority to take decisive actions in accordance with the operating procedures until the machine is stopped immediately. Article 34: For defects existing in large-scale units that cannot be addressed promptly, the Machinery Department shall organize relevant departments and units to conduct thorough studies and take appropriate countermeasures. After the unit stops operating due to a fault, it is necessary to conduct a thorough inspection and analyze the cause; the unit must not be started blindly. Article 35: Strengthen the lubrication management of the machinery units, strictly implement the lubrication management system, and ensure comprehensive management of lubricating oils, seal oils, control oils, and related equipment. Regularly analyze the quality of oil products, and advocate the use of advanced techniques such as ferrography and spectroscopic analysis to promptly detect conditions such as equipment wear. Article 36: Carry out regular maintenance of the standby units to keep them in good condition for use. Standby units need to be inspected regularly ； The oil pump is started once a week and rotated manually once a week; the electrical and instrumentation systems are inspected monthly with records kept. Conduct a trial run half a month before important holidays; keep running until all parameters of the equipment stabilize, then stop it for standby, and keep proper records of the trial run. Units with the same process number and serving as backups are switched every quarter. Article 37: Mechanical, electrical, and instrumentation maintenance personnel shall, in accordance with the requirements of their respective specialties, carry out routine maintenance work on mechanical equipment, electrical equipment, control instruments, and interlock protection systems, in order to continuously improve the equipment integrity rate, instrument control rate, and interlock operation rate. Article 38: To ensure the safety of the unit, the interlock protection system must be operated in automatic mode. The interlock protection devices originally installed in the unit must not be disabled without authorization; in special cases where such disabling is necessary, it must be done in accordance with the \"Provisions for the Management of Interlock Protection Systems\". Article 39: When large-scale units are started up or shut down, relevant professional technical personnel shall be present to supervise. Article 40: Advanced monitoring technologies should be actively adopted to carry out effective condition monitoring and fault diagnosis for large-scale units. Regular analysis and evaluation of the operational data of these units are necessary in order to improve the level of predictive management regarding their operating conditions. Chapter 7: Special Maintenance Management for Large-Scale Units Article 41: Strengthen the management of special maintenance for large-scale units by formulating detailed rules for such maintenance, holding regular meetings on special maintenance tasks, evaluating the work of the maintenance teams involved, and establishing appropriate reward and punishment systems. Article 42: A special-grade maintenance team for large-scale units shall be established, led by the Mechanical Department and comprising technical experts from fields such as machinery, electrical systems, instrumentation, operation, and management. A designated person from the Mechanical Department shall serve as the team leader, and the members of this special-grade maintenance team should remain relatively stable. Article 43: Responsibilities of the top-level maintenance team: (1) To earnestly implement the detailed rules for top-level maintenance established by the enterprise, and to carry out top-level maintenance work on the large-scale units under their responsibility. (II) Organize joint inspections on a weekly basis and hold regular special maintenance meetings to analyze and assess the operating conditions of large-scale units, propose corrective measures for any existing issues, and ensure the safe operation of these units. (III) Responsible for preparing the monthly reports on special maintenance and condition monitoring for large-scale units, and submitting the summary of monthly special maintenance work on time. Article 44: Special Maintenance Meeting (1) The special maintenance meeting is held every Wednesday at 9:00 a.m., chaired by professional engineers from the Maintenance Department. Participants include technical personnel designated by various maintenance units and special maintenance teams, team leaders, leaders in charge from the Maintenance Department and its professional engineers, as well as leaders in charge from various maintenance units. (II) The main contents of the special care meeting include the following: ① Each team reports on the equipment inspection results, operational status, lubricant analysis findings, the operation of utility systems, existing problems, and proposed solutions. ②The professionals from the Maintenance Department report on the status of inspections and provide recommendations regarding operational maintenance precautions. ③Check the inspection records of equipment in various units to understand the status of equipment inspections. ④Discuss the issues existing with the equipment and the handling suggestions put forward by the special care team, to formulate handling recommendations ； For major and complex equipment issues, the maintenance unit should first develop a detailed troubleshooting plan. After it is discussed and approved by the user unit, the Mechanical Affairs Department, and the relevant maintenance units, it shall be submitted to higher-level leadership for approval, after which the Mechanical Affairs Department will organize its implementation. ⑤Experience in the management of communication equipment, as well as new technologies and management theories. (III) The staff from the Mobility Department are responsible for taking minutes of the Special Care Committee’s meetings and for the archiving of those minutes. Article 45: Inspection of Special Care Equipment (1) The operator shall inspect the equipment every two hours and fill in the duty inspection record ； During inspections, it is mainly checked whether all operating parameters of the equipment are within specified ranges, ensuring compliance with the \"four no’s\" (no overpressure, no overheating, no overspeed, no overload). Report any issues found to the workshop supervisor or technical staff promptly. (II) Maintenance personnel shall conduct inspections on a regular basis once a day; during statutory holidays, the on-duty staff shall carry out inspections daily. Any issues discovered must be reported promptly to the workshop supervisor or technical personnel, and inspection records must be kept ； During inspections, in addition to listening, touching, observing, and smelling, various testing devices are used to check whether the equipment is operating within the specified parameters; equipment defects are carefully identified, and any issues found are addressed promptly. (III) The special care team organizes the technical personnel in the team to conduct joint inspections of the equipment on a regular daily basis, and keeps records of these inspections ； Any change to the joint inspection time must obtain the approval of the professional engineers from the Maintenance Department and be reported to the Special Care Committee. (IV) The responsible leader of the using and maintenance unit shall conduct a weekly inspection of the equipment, be responsible for checking the unit’s joint inspection records, and provide comments thereon. (5) The professional engineers from the Maintenance Department conduct weekly inspections of the equipment, carry out monitoring and analysis of its condition, check the results of joint inspections, and provide their opinions. On a monthly basis, they conduct a comprehensive analysis of the specially monitored units and prepare analysis reports ； In the event of any abnormalities, conduct thorough tracking, monitoring, and analysis, prepare a written report on the equipment’s condition, and report it promptly to higher-level management. Article 46: Management and Archiving of Special Care Records (1) Special care records consist of 5 categories, and the responsibilities for their management and archiving are as follows: Serial Number Record Type Managing Unit Frequency of Recording Person Responsible for Recording Archiving Unit 1 Operator inspection records Using unit Once every 2 hours Operators Using unit 2 Maintenance personnel inspection records Maintenance unit Once a day Maintenance personnel Maintenance unit 3 Joint inspection records for special care Special care team: Technicians once a day, professional engineers once a week, and supervisors once a week; technicians from the using/maintenance unit and professional engineers from the Operations Department Using unit 4 Special care meeting records Operations Department Once a week Professional engineers from the Operations Department Operations Department 5 Lubrication analysis reports Using unit Once every 2 weeks Lubricant analysts from the Quality Control Center Using unit (2) It is necessary to properly classify and archive the equipment records of one’s own unit, ensuring that the records remain complete and accurate. The retention period for these records shall be the same as the lifespan of the equipment. (III) Modifications and changes to the special care records shall be approved through discussion by the special care committee and require its joint signature. Article 47: Inspection and Assessment (1) The Equipment Management Department conducts monthly assessments on the 20th of each month, based on the implementation and management of special equipment care in various units, in accordance with the requirements of the economic responsibility system, in order to reward those who perform well and hold those who perform poorly accountable. (II) The Equipment Management Department conducts a comprehensive evaluation of the equipment every December, prepares an evaluation report, and submits it to the relevant supervisor. (III) The Maintenance Department summarizes the annual top-level maintenance activities in December each year and reports to the annual Equipment Management Meeting. Chapter 8: Maintenance of Large-scale Units Article 48: The production units and equipment maintenance teams submit maintenance plans to the Mechanical Operations Department. This department reviews these plans in light of the actual technical condition of the equipment as well as production requirements, and approves them accordingly. Maintenance plans for units are generally divided into annual plans and temporary plans. After the maintenance plan is compiled, it is sent to the production units and maintenance units. Article 49: In the event of serious problems during production, emergency repairs may be carried out upon approval by the factory management, and the necessary spare parts, tools, and materials must be made available. Emergency repair plans are formulated and issued on a temporary basis, and the related repair tasks must be completed on time. Article 50: The production unit formulates a shutdown plan based on the maintenance schedule, carries out the shutdown procedures in accordance with this plan, and issues a maintenance work order once the conditions for maintenance are met. Prepare a plan for the materials required for maintenance, submit it to the supply department for procurement, and track the arrival of those materials. Article 51: Before the maintenance of large-scale units, the Mechanical Department shall, in accordance with relevant maintenance procedures and the operating conditions of the units, organize the formulation of maintenance tasks and contents with the goal of achieving long-cycle operation ； Select a maintenance unit with strong technical capabilities and practical experience, and review the maintenance plan. Article 52: The maintenance unit shall, in accordance with the maintenance tasks and contents of the units as well as relevant maintenance procedures, and by referring to historical maintenance records, prepare maintenance plans and construction schedules. It shall also submit a plan for the spare parts required for maintenance; after approval by the Machinery Department, these plans shall be submitted to the Supply Department for procurement, and all preparations necessary for the maintenance work shall be carried out. Article 53: Maintenance units must establish a quality assurance system and implement various maintenance measures in accordance with the requirements of the HSE system, to ensure safe and orderly maintenance work and to complete the maintenance tasks on time and to the required standard. Article 54: During the maintenance process, the maintenance unit must organize the work in strict accordance with the maintenance plan and schedule, and provide technical training. Engineers responsible for the maintenance shall explain the structural features and technical requirements of the unit, so that those involved in the maintenance are fully aware of the technical data that needs to be measured and the issues that require attention. Strengthen inspections and quality acceptance during the maintenance process. For key intermediate steps, they must be jointly confirmed by the Mobility Department, the user unit, and the maintenance unit. Article 55: The maintenance process must be carried out in strict accordance with the unit’s manual and relevant regulations, ensuring civilized work practices and eliminating rough handling. Advanced specialized tools should be used; it is strictly prohibited to use hammers for random striking. The principles of “three lines,” “no exposure to the elements,” and “three levels of cleanliness” must be observed. Three lines: one line for tools, one line for parts, and one line for materials. Three things kept out of the light: lubricants kept out of the light, cleaned parts kept out of the light, and precision measuring tools kept out of the light. Three types of cleanliness: cleanliness of the site where work is suspended, cleanliness of the maintenance site, and cleanliness of the site where work resumes. Article 56: Maintenance personnel must be clear about the material composition and technical requirements of the materials, components, and equipment they take; it is absolutely not allowed to take them based on subjective assumptions. The supply department should provide accurate quality certificates and clear markings to prevent mixing and misuse. Article 57: During the maintenance process, the maintenance unit must fill in the inspection and repair records carefully, completely, and accurately. Data that must be measured and recorded during a major overhaul of the unit include: the concentricity of the unit before and after maintenance, the tightening torque of the coupling bolts as well as other bolts that require specific torque values, the installation position and locking pressure of the coupling, the levelness of the casing, the runout of various parts of the rotor, the ellipticity at the shaft journals, the gaps in the air seals, oil seals, and bearing shells, the tension on the bearing shells, shaft displacement, the assembly and positioning dimensions of the rotor relative to the casing, technical data related to sealing, the levelness of the gearbox, the center distance between the meshing gears, the meshing gap, and the replaced components. Article 58: During maintenance work, it is necessary to pay attention to coordination among different types of workers and to maintain close communication. Cross-functional tasks should be coordinated uniformly by the logistics department to avoid delaying the project timeline. Article 59: During the main maintenance process, the Mechanical Department shall propose the contents for intermediate inspections (i.e., inspections at key control points) as well as the inspection forms, and then organize personnel from various workshops to carry out joint inspections, with a joint signature on the intermediate inspection forms. One copy is kept by the production unit and one by the maintenance unit, with one copy retained by the Maintenance Department. After the maintenance is completed, the construction unit submits an application, and the Machinery Department organizes the final acceptance inspection. The inspection and acceptance process should be accompanied by complete handover documents, including: the maintenance plan, maintenance records, intermediate acceptance forms for the main stages of the maintenance work, as well as test and technical evaluation results. The acceptance record must be signed by the production, construction, and logistics departments. Article 60: During unit maintenance, the principle of \"three no-handovers\" must be adhered to (no handover if quality standards are not met, no handover without maintenance records, no handover if hygiene conditions are unsatisfactory), as well as the principle of \"four no-starts\" (do not start the unit until work is completed, do not start it if full guarantees are not in place, do not start it if there are obvious leaks, do not start it if hygiene conditions are unsatisfactory). Comprehensive quality management is implemented during the unit maintenance process, a quality assurance system is established to ensure the quality of maintenance work, and inspections are carried out in strict accordance with technical standards. Article 61: After the maintenance of large-scale units is completed, a trial run of the units shall be carried out, and records of the trial run shall be kept. The unit can be put into operation only after passing the trial run. The production unit organizes the startup process, develops a startup plan, trains the personnel involved in the startup, and ensures it is prepared to handle any potential issues that may arise. A static test must be conducted before starting up, with signatures from the production, construction, and maintenance teams; the startup process must be carried out strictly in accordance with the operating procedures. Article 62: Within one month after the unit begins operating normally, the maintenance unit shall submit the maintenance documents and commissioning records to the Machinery Department and the user unit for archiving. Article 63: After the machine is turned on, the Maintenance Department shall organize professional managers and equipment technicians to prepare a technical summary of the maintenance work. Article 64: Strengthen the management of spare parts for large-scale units. After the using and maintenance unit submits a purchase list, the Motorized Vehicles Department should carefully organize its review, while the Supply Department should carry out the purchases in strict accordance with the technical requirements and plans outlined by the Motorized Vehicles Department, to ensure the quality of the spare parts. Chapter 9: Update and Renovation of Large-scale Units Article 65: The update and renovation of large-scale units shall be carried out in a planned and targeted manner, in line with the enterprise’s safety production and technological development plans. Article 66: When large-scale units are in the following situations, renewal or renovation may be considered: (1) There are serious defects or they pose a serious threat to safe production. (II) Those that have exceeded their original designed service life, have aged components, outdated technical performance, and a high failure rate. (III) Those that, although not having exceeded their designed service life, have outdated technical performance, poor quality, frequent failures, and high maintenance costs. (IV) Those that cannot meet the production requirements. (5) **Those explicitly designated for elimination. Article 67: The Mechanical Department shall organize equipment condition assessments for large-scale units, and formulate plans for the renewal and renovation of such units based on the results of these assessments. Article 68: When upgrading or modifying large-scale power units, thorough technical and economic evaluations must be conducted. New technologies should be actively adopted to improve the performance of these units, so as to achieve safety, reliability, and economic Reasonableness The optimal solution should be chosen to ensure good returns on investment in such equipment. Article 69: The Motorization Department is responsible for formulating and submitting plans for the renewal and renovation of large-scale units. After approval by higher-level authorities, these plans are included in the annual renewal project schedule, which is then implemented carefully. Article 70: Enterprises shall go through the procedures for scrapping large-scale units that need to be scrapped in accordance with the relevant regulations of group companies and joint-stock companies. Chapter 10 Inspections and Assessments Article 71: The contents of inspections shall include: (1) Whether the operating capacity of large-scale units meets the requirements of normal production or reaches the designed capacity. (II) Whether all operating parameters, mechanical performance parameters, and lubricant performance indicators of the large-scale units are within the ranges specified in the operating procedures. (III) Whether the main unit and auxiliary equipment (coolers, separators, lubrication systems, sealing systems, pipes, valves, etc.) are in good condition. (IV) Whether the control rate, utilization rate, integrity rate, and interlock activation rate of the instrumentation system meet the specified requirements. (5) Whether the electrical equipment is in good condition. (VI) Whether all kinds of documents and records are complete, accurate, and properly documented in a timely manner, and whether special-level maintenance tasks have been carried out. Article 72: The assessment contents and standards shall include: (1) A good condition rate of large-scale units greater than 98%. (II) The compliance rate of lubricant specifications is 100%. (III) The utilization rate of the interlock protection system is 100%. (IV) The integrity rate of electrical equipment is 100%. (5) The archival materials (including records of special-level maintenance meetings, defect records, technical archives, lubricant analysis records, accident records, condition monitoring records, etc.) are complete and accurate, with entries made in a timely manner. (VI) The number of unplanned shutdowns of the equipment due to faults in the unit itself is zero. (7) Zero major accidents.