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Matters needing attention in overhaul of large equipment in power plant
1 Preparation before overhaul 1 Before the overhaul begins, the maintenance workers, temporary workers, outsourcing workers, etc. who take part in the overhaul should take a safety examination, so that they can work with certificates, and the maintenance workers who take part in the overhaul should also take a safety examination when necessary; For the production workshops involved in maintenance, a "maintenance mobilization meeting" should be organized before the maintenance begins, and employees should be organized to learn various maintenance plans and safety assessment rules and regulations, so that the maintenance plans and safety assessment rules and regulations can participate in the maintenance, and all the personnel involved in the maintenance can achieve "I want safety, I know safety and I will be safe". The preparatory work before overhaul includes: (1) The factory department establishes the overhaul headquarters and issues the overhaul notice. (2) Release maintenance safety management regulations, maintenance project and schedule flow chart, maintenance safety assessment rules, maintenance safety supervision and inspection system, maintenance civilized construction standards, etc. (3) formulate corresponding safety measures for non-standard projects, which shall be examined and approved by relevant departments. (4) Power instruments, safety instruments and rigger instruments used in maintenance shall be tested according to test standards, and test reports and certificates shall be provided, and accounting records shall be kept. (5) All kinds of grounding wires, signs and warning signs are ready. 2. System isolation should strictly implement the "three votes and three systems". According to the requirements and measures of "Work Ticket, Operation Ticket and Operation Safety Measure Ticket", the corresponding equipment should be hung with warning signs such as "Someone is working", "No switching", "No fireworks", "No passing" and "Preventing falling objects from high altitude" and locked. Use guardrail, net, belt, etc. 3. Control of safety key points during maintenance 3. 1 Control the safety of operation process. Before starting work, organize relevant personnel to learn the items and measures of maintenance work, and fill in the "Safety Work Measures Ticket", work content, staff list, safety precautions and on-site danger point analysis. 3.2 Management of temporary power supply during construction The temporary power supply box for unit maintenance should be carefully checked, and the damaged or unqualified power supply box should be repaired and replaced. Set up a register of temporary power supply for unit maintenance, and set up a professional electrician group to be responsible for the temporary power supply maintenance. 3.3 Standardize lifting operation. Before using each lifting equipment, check and test snap rings, wire ropes, cranes, winches, chains, etc. Establish account according to the standard, record and paste the Certificate of Conformity, and do the load test of temporary hoisting. Accurate load calculation and test should be carried out for major hoisting operations, and the hoisting operation department should fill in the "Application Form for Hoisting Operation" two days in advance, and the hoisting operation can only be carried out after it is approved by the relevant departments of the factory overhaul headquarters. Lifting operation should be commanded and operated by professionals. 3.4 The acceptance control scaffolding (1) is more than 3m from the ground, and the multi-person working platform is accepted by professionals of the factory maintenance headquarters. (2) A small number of personnel platforms below 3m from the ground shall be checked and accepted by professionals of the user department. (3) After the scaffold erection, the acceptance shall be more than 3m from the ground. After the acceptance by the safety technicians of the department, the department shall fill in the acceptance contact form, and after the joint inspection by the safety supervision department and the biotechnology department, the "scaffold inspection certificate" shall be issued and pasted on the scaffold. Fill in the "Scaffolding Inspection Certificate" below 3m from the ground, and paste it on the scaffold after it is accepted by the safety technicians of this department. 3.5 Strengthen the management of on-site wells, pits, holes and temporary fences. For wells, pits, holes and temporary fences opened and dismantled during maintenance and overhaul, safety fences and protective nets should be set up, warning lights should be added at night, and "safety warning" signs should be hung. 3.6 Management of inflammable and explosive articles (1) During maintenance, there are many inflammable articles used on site, such as oxygen bottles, acetylene bottles, gasoline and kerosene. These items should be placed separately, such as oxygen bottles and acetylene bottles, empty bottles and full bottles. Gasoline and kerosene should be kept away from kindling and kept and registered by special personnel. (2) When hot work is carried out in fire prevention equipment and fire-forbidden areas, such as oil system, pulverized coal equipment, hydrogen cooling unit and hydrogen system. , should handle the "hot work ticket", and take various fire prevention measures. 4. Civilized construction (1) Workshops and teams involved in maintenance should divide the tool boxes at the maintenance site, and put the spare parts of equipment and dismantled spare parts into a fixed position for management. Before the start of overhaul, the factory overhaul headquarters should make a customized positioning map and distribute it to the team. (2) The site shall provide a safe passage. (3) For fragile ground, when dismantling and placing equipment, wooden boards or rubber boards should be laid on the ground. (4) When working on the ground which is easy to absorb oil, oil-resistant rubber should be laid to prevent secondary pollution. 5. Adhere to the pre-shift meeting, mobilization meeting, trade union summary meeting and post-shift meeting in safety group activities, and adhere to weekly safety activities. (1) briefing. The monitor should explain the work content, construction quality requirements, safety measures and precautions of the work items to the staff, and designate a special person to be responsible. The "Work Ticket" and "Safety Measure Ticket" filled in by the person in charge of each operation site shall be strictly reviewed, especially to check whether the safety measures and precautions are comprehensive. (2) kick-off meeting. Before the start of each job, the person in charge of the job should read out the work contents, safety measures and precautions to other staff members, and then read out the safety precautions and measures filled in the "Work Safety Measures Ticket". After reading, all participants should sign in the signature column, and the signature column is not allowed to be changed. (3) collecting trade unions. Briefly summarize the day's work, count the personnel and tools, and check whether there are any left-over items and kindling on the site. (4) After-hours meeting. First of all, all situations at work will be reported by the person in charge of the work. After the report, the monitor will make a comprehensive summary. (5) Adhere to the weekly safety activity day, learn the safety regulations, measures and systems related to work, and convey the documents related to safety management from the factory maintenance headquarters. 6. Organize pickets to suppress violations. Organize a security violation picket. The picket team consists of professionals from the factory overhaul headquarters, safety supervision departments and workshop safety management personnel (set up according to the actual situation), and patrol the overhaul site every day to correct violations in time. And regularly publish the phenomenon and personnel violating the rules in the "Violation Notice", point out the problems existing in the violation, and conduct the assessment according to the "Detailed Rules for Inspection of Maintenance Violation". Set up the "exposure column of violation system" at the maintenance site, shoot the violation system on the spot, and expose it on the "exposure column" and MIS website, which not only educates yourself, but also educates everyone. In addition, the public security, fire control and medical system should be established during the maintenance to ensure the smooth progress of the maintenance. 7 Carry out strict safety customer care (1) for temporary workers and outsourcing workers. Before the overhaul, all temporary workers and outsourcing engineering personnel participating in the overhaul shall be educated and tested on safety regulations and safety knowledge, and unqualified personnel shall not participate in the overhaul. (2) Three certificates (safety qualification certificate, business license and tax registration certificate) shall be audited for the personnel of the construction team and installation team who participate in the outsourcing project. The outsourcing construction team with incomplete three certificates cannot be used by bidding. Personnel participating in special operations must hold special operation licenses, such as aerial work licenses and scaffolding installation certificates. (3) Adhere to the principle of "whoever employs is responsible". The employer shall conduct safety examination and disclosure of safety measures for workers who resume classes and outsourcers, register those who pass the examination, and obtain the "temporary employment certificate" from the factory safety supervision department before the employer's guardian can enter the site for work, otherwise, it shall be assessed in violation of regulations. (4) Factory safety supervisors and users should establish temporary files (including ID cards, photos, various qualification certificates, etc.). ) for temporary workers and outsourcers. (5) The system of "security construction deposit" shall be implemented for temporary teams and outsourcing construction teams involved in maintenance. Before leaving work, according to the percentage of the total project cost (determined by itself), pay the "safety construction deposit" to the unit, and sign the "Safety Construction Responsibility Agreement" as an annex to the contract. Anyone who violates the rules and acts arbitrarily in the construction will be deducted from the "safety construction deposit" according to the "Safety Assessment Rules" of the unit after being detected by the supervision and inspection department. 8. After the maintenance is completed, the safety facilities of the field equipment shall be fully restored. Access covers, stairs, walkways and railings are complete. Indoor and outdoor lighting is complete. Equipment description is complete. The flow direction and signs of equipment and media are complete.