Fire, explosion, poison, and corrosion prevention management system
Thread Content
Fire, explosion, and poison prevention management system 1. Basic principles 1.1 Chemical enterprises must exercise strict control over flammable and explosive materials used, as well as processes and equipment that pose fire and explosion risks. Effective safety measures should be taken to prevent fires and explosions, reduce the impact of such disasters, and thereby protect the company’s property and the safety of its employees. 1.2 Implement the policy of \"prevention first, combining prevention with suppression,\" actively adopt advanced fire prevention and extinguishing technologies, establish professional and volunteer fire protection organizations, carry out safety and fire prevention education, and strengthen fire inspections as well as the management of fire extinguishing equipment. 2. Production Facilities 2.1 In accordance with the classification requirements based on the fire and explosion hazards associated with the production and use of hazardous chemicals, the design and layout of the factory buildings, the architectural structure, the selection and installation of electrical equipment, as well as relevant safety facilities, must all comply with **the relevant fire protection requirements. 2.2 In those parts of the process equipment where fires or explosions may occur, instruments for monitoring temperature and pressure, as well as alarm systems (sound and light) and safety interlock devices, should be installed. 2.3 In areas where flammable gases (vapors) may leak and spread, gas concentration detectors and alarms should be installed. The alarm threshold value should be set at 20% below the lower explosive limit of that gas; if integrated with safety interlocks, the interlock shall activate at 50% below the lower explosive limit of that gas. 2.4 All automatic control systems shall be equipped with manual control systems as well. 2.5 All pipelines for transporting inert gases and oxidizing gases that are connected to flammable and explosive devices shall be equipped with mechanisms to prevent the entry of such flammable and explosive substances, but check valves alone should not be used. 2.6 For equipment where overheating or overpressure may occur due to the synthesis or decomposition of reaction materials, posing a risk of fire or explosion, automatic and manual emergency pressure relief systems should be installed. 2.7 A flame arrester should be installed at the outlet of the vent pipe for combustible gases (vapors), and a stop valve should be placed in an easily accessible location so that the gas supply can be cut off to extinguish a fire that occurs at the vent pipe outlet. 2.8 When transporting flammable and explosive materials, an appropriate flow rate should be controlled based on the pipe diameter and the resistivity of the medium, in order to minimize the generation of static electricity as much as possible. Anti-static measures for equipment, pipelines, etc., shall be implemented in accordance with the relevant provisions of the \"Technical Specifications for Static Grounding Design in Chemical Enterprises\" (CD90A3—). 2.9 Production or storage equipment that poses a risk of sudden overpressure or instantaneous decomposition explosion shall be equipped with blast shields (explosion-proof membranes); the outlet of the detonation tube shall face in a safe direction, and measures to prevent secondary explosions and fires shall be taken as necessary. 2.10 At the outlets for industrial wastewater from various production units, buildings, structures, tank farms, etc., in addition to water seal wells as required, isolation valves should also be installed between these areas and the water seal wells to prevent large amounts of flammable and explosive substances from entering the wastewater system. 2.11 For safety valves and vent pipes used with flammable and explosive gases, their outlet pipes must be placed outdoors and at a height of more than 2 meters above the building. 3. Hot work and use of fire 3.1 Based on the level of fire risk as well as the needs of production, maintenance, construction, etc., the using unit shall submit an application; the factory’s safety department will then conduct registration and approval to designate designated areas for hot work. All areas outside the designated hot work zones are considered no-fire zones. 3.2 Conditions and requirements for establishing fixed hot work areas: 3.2.1 Fixed hot work areas should be located upwind of flammable and explosive areas. 3.2.2 The distance from flammable materials, flammable buildings, tank areas, equipment, manholes, drainage ditches, water seal wells, etc., should be no less than 30 meters. 3.2.3 Indoor fixed hot work areas shall be separated from other areas by solid fire protection facilities, with doors and windows opening outward and clear access routes. 3.2.4 During normal venting or in the event of an accident, combustible gases will not spread into the fixed hot work area. 3.2.5 Flammable, explosive materials and other debris are not allowed to be stored in designated hot work areas, and a sufficient amount of fire-fighting equipment must be provided. 3.2.6 Clear signs shall be installed in designated hot work areas, and dedicated personnel shall be assigned for management. 3.3 In no-fire zones, except for fires used in the production process, all other long-term operations that can generate flames, sparks, or surface heat (such as electric furnaces, electric heaters, alcohol stoves, tea kettles, etc. used in laboratories) require a \"Fire Use Permit,\" and the validity period of such permits shall not exceed one year. The use of electric stoves, gas stoves for heating or warming food is prohibited in the production area. 3.4 The “Fire Use Permit” shall specify the person in charge, validity period, area where fire is allowed, and safety fire prevention measures. All permits for using fire must be approved by the security department, and such permits should be displayed near the area where fire is used for easy reference. 3.5 The use of electric or gas welding (cutting), blowtorches in no-fire zones, as well as temporary operations that generate flames, sparks, or hot surfaces such as the use of electric drills and grinding wheels in flammable and explosive areas, are all considered hot work; a \"Hot Work Permit\" must be obtained for such activities. 3.6 Hot work is managed under a three-level system: 3.6.1 Special hot work refers to hot work that involves special risks in important areas such as flammable and explosive production facilities and tank farms that are still in operation. 3.6.2 Class 1 hot work: hot work carried out in flammable and explosive areas (i.e., areas with Class A or Class B fire hazards). 3.6.3 Class 2 hot work refers to hot work operations other than Class 1 hot work and special hot work. 3.6.4 For hot work carried out after the entire plant, a workshop, or a single building has been shut down, and after the equipment has been cleaned, purged, analyzed to confirm its suitability, and isolation measures have been taken, the level of risk associated with such hot work can be reduced, either entirely or partially, to level 2 according to the degree of fire hazard involved. 3.6.5 For hot work during festivals, holidays, or in cases of abnormal production conditions, enhanced management measures shall be implemented. 3.6.6 All areas where hot work is carried out shall be uniformly planned by the plant’s safety department, and marked on the plant layout plan. 3.7 Special hot work and Class 1 hot work must be approved following a proper analysis before they can be carried out; the validity period of such hot work permits is one day (24 hours) ； Secondary hot work also requires analysis, and its hot work permit is valid for six days. 3.8 The hot work permit must clearly indicate the level of hot work, its valid period, the entity that applied for it, the exact location where the hot work will be carried out, the details of the work to be done (including the methods used), the safety measures to be taken, the time and place at which samples were taken for hot work analysis, the results of such analysis, the time each time the hot work begins, as well as the signatures and comments of all responsible persons and approvers at various levels. 3.9 Responsibilities of Various Persons in Charge 3.9.1 The person in charge of the hot work is fully responsible for carrying out the hot work. He/she must thoroughly understand the details of the work to be done, as well as the location of the hot work and the surrounding area, before proceeding with it. This person is also responsible for developing safety measures for the hot work, and for informing the workers about their tasks and the fire safety precautions that need to be followed. 3.9.2 After receiving the hot work permit, the person carrying out the hot work must carefully verify whether all the requirements specified in it have been met and whether the approval procedures are complete. If it is found that the conditions for performing hot work are not met, one has the right to refuse to carry out such work and report it to the company’s safety department. The person performing hot work must carry the hot work permit with them at all times; working without a permit or with incomplete approval procedures is strictly prohibited. 30 minutes before each welding operation (including when resuming work after a break of more than 30 minutes), the welding permit must be presented to the personnel on duty at the site. 3.9.3 The hot work supervisor is responsible for conducting safety and fire prevention inspections at the hot work site, and such a role should be assigned to someone who is responsible, experienced, familiar with the site, and knows how to extinguish fires. The fire work supervisor must sign to approve the fire work permit. The supervisor must not leave the site during the operation; in case of any abnormal situation, they should immediately order the operation to be stopped and contact the relevant personnel to take action. After the task is completed, it is necessary to inspect the site together with the person in charge of the hot work and the person performing the hot work, to eliminate any remaining embers and ensure that no fire sources are left behind before leaving the site. 3.9.4 The team leader (shift supervisor) is responsible for coordinating production activities with hot work operations. During hot work, if there is an emergency or abnormal situation in the production system, it is necessary to immediately order the cessation of the hot work. 3.9.5 The hot work analyst is responsible for the analysis results; they must fill in the sampling time and analysis results accurately on the hot work permit and sign to confirm them. 3.9.6 Review and approval officers at all levels must bear full responsibility for the approval of hot work. They must go to the site in person to thoroughly understand the area where the hot work will be carried out and its surrounding conditions, assess and determine the level of risk associated with such work, examine and improve the fire safety measures, and verify that all the approval procedures are in place. Only after confirming that all safety conditions are met can they sign off on the approval of the hot work. 3.10 The regulations regarding the final approval authority for different levels of hot work are as follows: For Level 1 hot work, the entity carrying out the work must submit it to the factory’s safety department for reevaluation, with final approval granted by the general manager or the deputy general manager in charge. Level 2 hot work requires re-examination by the person in charge of the unit where the hot work will be carried out, followed by final approval from the factory’s safety department. For special hot work, it must be reviewed by the factory’s safety department before being submitted to the general manager or the deputy general manager in charge for final approval. 3.11 Hot work analysis shall comply with the following provisions: 3.11.1 Sampling must be representative, and the analysis samples for special hot work shall be retained until the completion of the hot work operation. 3.11.2 The interval between sampling and hot work must not exceed 30 minutes; if this interval is exceeded or hot work is suspended for more than 30 minutes, sampling and analysis must be carried out again. 3.11.3 When analysis is carried out using a detonation meter (or other similar devices), such instrument must be calibrated and validated using standard samples of the object under test. 3.12 The following standards shall be followed for hot work analysis: 3.12.1 When using an explosion detector, the concentration of the gas or vapor in the area being tested shall be less than or equal to 20% of the lower explosive limit (on a volume basis, the same applies hereafter). 3.12.2 When other analytical methods are used, if the lower explosive limit concentration of the gas or vapor being tested is 10% or higher, its concentration shall be less than 1% ； When the lower explosive limit concentration is 4% or higher, it should be less than 0.5% ； For those with an explosive lower limit concentration of less than 4%, the concentration should be less than 0.2%. 3.13 The following relevant regulations shall be followed when performing hot work: 3.13.1 For any equipment, pipes, or other components that may be in contact with flammable or explosive substances, blind plates must be used to completely isolate them from the system; where necessary, a section of the connecting pipe should be removed as well. 3.13.2 For equipment, pipelines, containers, etc., that contain flammable or explosive substances, work involving open flames may only be carried out after sediment removal, cleaning, and substitution analysis have shown satisfactory results. If welding is to be carried out inside equipment, a “Work Permit for Equipment Interior” must also be obtained. 3.13.4 Appropriate fire-fighting equipment or extinguishing measures shall be available at the area where welding is carried out. 3.13.5 Outdoor welding operations should be halted in case of winds of force 5 or above. 4. Fire protection organizations and facilities 4.1 Adhere to the fire protection policy of \"prevention first, combined prevention and suppression,\" adopt advanced fire and explosion prevention technologies for disaster relief, and implement target management. 4.2 Enterprises must establish a fire safety committee composed of senior management and leaders of various functional departments ； The workshop shall establish a fire safety team as well as a voluntary fire fighting group under its leadership. 4.3 The fire protection organization shall formulate fire protection work plans based on the characteristics of the enterprise, its production and maintenance activities, as well as seasonal changes, and implement target management for fire protection. Conduct regular fire safety education and training, as well as drills based on hypothetical accidents. 4.4 Strict management shall be exercised over all flammable and explosive materials, as well as over the processes of production, storage, transportation, sales, and use that may pose a risk of fire or explosion, along with the related equipment. 4.5 Enterprises shall, based on factors such as production scale, fire hazard level, and the fire protection support that can be provided by adjacent units, determine the appropriate fire protection facilities and equipment for the production, storage, and transportation of goods in accordance with relevant requirements set out in **, ministerial regulations, and other applicable standards. 4.7 Fire-fighting equipment should be placed in a location that is visible, easily accessible, and safe. It must be inspected regularly, following the principle of \"three fixings\" (fixed location, fixed type, and designated personnel responsible for its maintenance), and it is not allowed to be used for other purposes. 4.8 In the event of a fire, those on site should immediately take action to extinguish it, and alert the security department as well as relevant personnel in the factory, providing information about the substance that is on fire. If the involvement of the fire department is necessary, someone should be sent to the intersection to guide the fire trucks, indicating the route for them to take and the locations of fire-fighting water sources. Volunteer firefighters must actively cooperate in extinguishing the fire and maintaining order at the scene. 5. Other fire safety measures 5.1 Implement the Ministry of Chemical Industry’s “Regulations on Banning Smoking in Chemical Enterprises”. 5.2 Motor vehicles are prohibited from entering flammable and explosive production areas as well as warehouses storing flammable and explosive chemicals. Motor vehicles that must enter the aforementioned areas shall be equipped with flame arresters or other safety measures. 5.3 It is strictly prohibited to use flammable liquids such as gasoline to clean motor vehicles, equipment, floor scales, and clothing. 5.4 Used oil-cotton gauze, oil paper, and other flammable cleaning materials should always be placed in covered metal containers designed for this purpose, stored in a safe location, and removed on a regular basis. 5.5 It is not allowed to store non-production-related liquefied petroleum gas cylinders randomly within the factory, and flammable and combustible liquids such as alcohol are not permitted to be kept in offices and **interior areas. 5.6 It is strictly prohibited to construct buildings or structures or stack various materials within fire separation distances and fire access routes. 5.7 It is strictly prohibited to store flammable materials under high-voltage lines. The distance between flammable and explosive factories, warehouses, and installations and high-voltage lines must be more than 1.5 times the height of the high-voltage line towers. 5.8 Units that develop new flammable and explosive materials, products, as well as new equipment with fire and explosion hazards must implement fire safety measures in accordance with the specific methods for preventing fires and explosions provided by the development department. Only after obtaining approval from the higher-level competent authorities can such products be put into production. 5.10 Tools that are highly likely to generate sparks are prohibited in flammable and explosive areas. 5.11 In flammable and explosive areas, it is prohibited to wear work clothes made of fiber materials that can generate static electricity sparks, as well as shoes with metal nails. 5.12 When fighting fires involving toxic and hazardous substances, one should stand upwind and wear protective gear if necessary. 5.13 Garages shall comply with relevant regulations such as the Code for Fire Protection Design of Garages (GBNJ67—). 5.14 The management of various material warehouses shall, in addition to complying with the regulations regarding the management of material warehouses, also adhere to the relevant provisions of Articles 8 and 9 of these rules. 5.15 Other regulations regarding fire and explosion prevention shall be implemented in accordance with the relevant sections of this system as well as the requirements of other systems. This post was last edited by snowdfr on 2009-3-7 20:44.]
Corrosion Prevention Management System Chapter 1 General Provisions Article 1 This management system is formulated in order to strengthen the management of equipment corrosion prevention, prevent and reduce damage to production equipment caused by corrosive substances, extend the service life of equipment, ensure safe production, further improve the level of corrosion prevention efforts, and in accordance with the Group Company’s \"Equipment Management Measures (Trial)\". Article 2: This system specifies the requirements regarding the establishment of anti-corrosion management organizations for equipment in branch companies, their responsibilities, and technical management. Article 3: Corrosion prevention management of equipment is a key aspect of equipment management. All types of equipment, pipelines, structures, etc. that are subject to corrosion by process media, cooling water, the atmosphere, soil, etc. (hereinafter collectively referred to as “equipment”) must adopt corresponding anti-corrosion measures. Chapter 2 Management Responsibilities Article 4 The deputy manager in charge of equipment management at the company, under the leadership of the manager and in accordance with the management requirements and responsibilities stipulated in the \"Equipment Management Measures (Trial)\", is fully responsible for the corrosion prevention work related to equipment at the Tianjin branch. Article 5: The company shall establish a leadership group for corrosion protection and a corrosion protection technology center, which are responsible for researching and making decisions on major corrosion prevention issues within the company, as well as carrying out corrosion investigations, monitoring, and other related corrosion prevention tasks. Article 6: The company’s equipment management department shall assign full-time or part-time technical personnel to be responsible for equipment corrosion prevention work. Their main responsibilities include: 1. Under the leadership of the company’s deputy manager in charge of equipment and the leading group for corrosion protection work, they are responsible for the technical management of equipment corrosion prevention, and they collaborate with relevant departments to carry out effective corrosion prevention management and research efforts. 2. Responsible for implementing relevant laws, regulations, as well as the group company’s various systems, rules, procedures, and standards; and formulating equipment corrosion prevention management systems in light of the company’s specific circumstances. 3. Responsible for the technical management of corrosion prevention for the company’s equipment, supervising various secondary units to implement the group company’s regulations regarding corrosion prevention, and checking the level of compliance. 4. Responsible for organizing corrosion protection measures for the equipment used in processes such as the processing of high-sulfur crude oil. 5. Responsible for reviewing the annual monitoring and maintenance plans for corrosion prevention projects in the company’s subsidiary units, inspecting the corrosion prevention measures applied to key equipment, and overseeing the implementation of these corrosion prevention plans. 6. Organize and participate in the investigation, analysis, handling, and reporting of major equipment corrosion and leakage incidents. 7. Participate in the review of construction plans for major anti-corrosion projects as well as in their completion inspection. 8. Promote the application of new technologies, new materials, new processes, and new equipment, and organize technical exchanges on equipment corrosion prevention. 9. Keep track of the corrosion trends of major production units and key equipment, and supervise and inspect subordinate units to carry out regular corrosion inspections, tests, as well as daily corrosion prevention measures. 10. Supervise and inspect each secondary unit to establish and improve technical documentation for corrosion prevention management. Article 7: The production technology management department is the department responsible for process corrosion prevention. Its main responsibilities include: 1. Under the leadership of the company’s deputy manager in charge of production technology and the leading group for corrosion protection work, it is responsible for managing the company’s processes related to corrosion prevention, and works together with relevant departments to ensure effective implementation of these measures. 2. Responsible for formulating the company’s process anti-corrosion management systems and detailed procedures, as well as monitoring their implementation. 3. Participate in the preparation of the company’s annual anti-corrosion plan, and monitor its implementation. 4. Promote the application of new technologies, new materials, new processes, and new equipment, and ensure proper technical management for corrosion prevention in these processes. 5. Responsible for formulating and improving the technical regulations for process corrosion prevention, job operation procedures, and process cards, as well as overseeing their implementation. 6. Responsible for formulating anti-corrosion plans and measures for production processes such as the processing of high-sulfur crude oil, organizing the development of anti-corrosion technologies, and monitoring the implementation of process operations. 7. Responsible for providing information on the sulfur distribution and acid distribution of the device. Article 8: The Company’s Corrosion Protection Technology Center is the unit responsible for research on corrosion prevention for company equipment, as well as for its inspection (monitoring). Its main responsibilities include: 1. Being in charge of corrosion prevention measures for the company’s processes, as well as the inspection (monitoring), testing, and evaluation of equipment corrosion resistance. 2. Responsible for carrying out corrosion investigations on production plant equipment and pipelines. During major overhauls of key equipment and devices suffering from severe corrosion, a comprehensive corrosion investigation should be conducted, and a corrosion investigation report along with recommendations for corrective actions should be prepared. 3. Develop and implement various corrosion monitoring measures to keep track of the corrosion status of equipment in real time, and be responsible for tasks such as targeted thickness measurement, coupon placement, and the use of corrosion probes at various corroded areas. Predict the service life of equipment, and conduct failure analysis and research. 4. Carry out research projects on corrosion prevention to develop reasonable corrosion protection solutions for installations and equipment. 5. Establish a corrosion database for the equipment to understand the patterns of corrosion, guide the implementation of effective anti-corrosion measures, and support the competent authorities in carrying out proactive and preventive corrosion control in production management. 6. Collaborate with the production facilities to analyze the corrosive agents and corrosion products of equipment prone to corrosion. 7. Cooperate with relevant departments in the review of anti-corrosion project plans and quality monitoring. 8. Responsible for research on process corrosion prevention, material corrosion prevention, and other protection technologies. Article 9 Responsibilities of the project construction management department: Implement the relevant specifications, regulations, and standards set by ** and the group company; supervise the construction units responsible for the projects to carry out construction in strict accordance with the technical requirements of the anti-corrosion design; and organize the inspection of the construction quality. Article 10 Responsibilities of the Materials and Equipment Department: 1. Purchase equipment, materials, anti-corrosion coatings, and chemicals strictly in accordance with the technical requirements specified by the design team or the client; the quality of these items must meet **standards or industry standards. 2. In accordance with relevant quality standards, be responsible for conducting quality inspections on various corrosion-resistant materials, coatings, and chemicals purchased, and only those that pass the inspection may be stored in the warehouse. Article 11 Responsibilities of the equipment management department in secondary units: 1. Implement the anti-corrosion management systems set by the head office and the company, and carry out effective anti-corrosion management work within the respective unit. 2. The equipment management departments of each secondary unit shall assign full-time or part-time technical personnel to be responsible for the technical management of equipment corrosion prevention. 3. Responsible for preparing the annual plan for anti-corrosion inspection of the unit’s equipment, and ensuring its implementation. 4. Formulate detailed rules for the anti-corrosion management of the unit’s equipment, and be responsible for their implementation as well as supervision and inspection. 5. Be responsible for establishing and improving the anti-corrosion documentation system within the unit, creating records for equipment and pipelines prone to corrosion as well as collections of corrosion-related images, and setting up a database. 6. Organize relevant units to carry out anti-corrosion investigations and monitoring to understand the anti-corrosion status of the equipment and formulate improvement measures. 7. Participate in the technical department’s efforts to establish process anti-corrosion control parameters, monitor the implementation of these parameters, and work with the technical department to revise them in a timely manner as changes occur in crude oil and chemical materials. 8. Inspect the construction quality and participate in the completion acceptance of the unit’s anti-corrosion projects. 9. Conduct regular training on corrosion prevention techniques for equipment management personnel in production workshops, and promote the application of new technologies, materials, processes, and equipment. 10. Collaborate with the technical management department in reviewing the demand plans for various anti-corrosion chemicals as well as the suppliers, and participate in the quality inspection and evaluation of such chemicals. 11. Responsible for organizing the investigation and analysis of corrosion incidents. 12. Responsible for preparing anti-corrosion investigation reports and anti-corrosion reports, which are compiled into the monthly asset reports and submitted to the company’s equipment management department on a monthly basis. Chapter 3: Management Requirements Article 12: Corrosion prevention projects and equipment shall be subject to scientific management in order to provide comprehensive protection measures for them. These measures include reasonable design, proper selection of materials, careful construction, inspection and acceptance, comprehensive protection, testing and monitoring, as well as automatic control. Article 13: Strict control should be exercised over the process operating conditions; overloading and improper operations are strictly prohibited. In particular, the content of corrosive substances in the materials must not exceed the specified levels, in order to prevent increased equipment corrosion due to fluctuations in the production process. The arbitrary discharge of corrosive substances is prohibited. When process conditions change, corresponding measures should be taken to prevent the corrosion protection measures of the equipment from becoming ineffective. Article 14: Special protection shall be provided for the key corrosion-prone areas of the main production units, with regular monitoring carried out. Article 15: Corrosion-resistant materials shall be used for their designated purposes. Corrosion-resistant equipment, spare parts, and materials must come with certificates of conformity, test reports, and material identification marks; their use and storage shall comply with relevant regulations. Article 16: Existing anti-corrosion equipment shall not be canceled or altered arbitrarily. If changes are indeed necessary, the using unit must submit a proposal, which must be approved by the production and technical department as well as the equipment management department before any modification can be made. Article 17 Equipment anti-corrosion projects shall not be put into production use without passing the completion acceptance inspection. Article 18: Attention should also be paid to the corrosion caused by fuel, circulating water, and chemicals. The equipment management department shall work together with relevant departments to carry out monitoring and take measures to protect the equipment. Article 19: Corrosion prevention management shall employ effective testing methods to monitor equipment, and active efforts shall be made to establish conditions for the use of online monitoring techniques. Article 20: Several aspects to note when conducting parking inspections: 1. Assess the degree of dirt on the equipment; conduct component analysis if necessary, and archive the data. 2. Investigate the corrosion and damage of the equipment. Special attention should be paid to investigating the forms, types, distribution of corrosion, and damage that cannot be clearly identified during the operation of the equipment; changes in the wall thickness of the equipment should also be measured. 3. Investigate the degree of degradation in the strength of equipment materials, as well as whether and to what extent phenomena such as temper embrittlement, hydrogen embrittlement, stress corrosion, and creep cracks occur in the components under the effects of high-temperature creep and thermal stress. 4. To determine the corrosion rate rapidly, probes (resistance probes, coupon probes, hydrogen probes, etc.) should be used as much as possible in locations where such conditions exist for monitoring purposes. 5. Metallographic and microscopic analysis should be conducted on areas affected by abnormal corrosion (intergranular corrosion, hydrogen embrittlement, stress corrosion, etc.). 6. Equipment prone to corrosion, such as the tube sheets, baffle plates, and shells of heat exchangers ； Heating furnace tubes, elbows ； The head and shell of the tower ； Detailed inspection plans should be developed for areas such as the reactor nozzles and cladding layers. 7. By integrating the results of various tests, analyze the causes of corrosion, propose protective measures, take photographs of typical corrosion sites for archiving, and compile materials on such typical corrosion cases. 8. Each secondary equipment management department shall organize equipment corrosion investigations during the shutdown for maintenance of the facilities, and within one month after the maintenance is completed, it shall summarize the results of these corrosion investigations and fill out records regarding equipment corrosion after the maintenance. Equipment with severe corrosion should be reported immediately, and the equipment management department shall organize the formulation of action plans. The damaged anti-corrosion coating after maintenance must be repaired promptly. 9. The principles for selecting materials to prevent corrosion in equipment should be in accordance with Sinopec’s \"Guidelines for the Selection of Materials in the Design of Key Equipment for Processing High-Sulfur Crude Oil\" SH/T3096-2001 and \"Guidelines for the Selection of Materials in the Design of Key Pipelines for Processing High-Sulfur Crude Oil\" SH/T3129-2002. At the same time, corresponding material upgrade plans and anti-corrosion measures should be formulated based on the results of corrosion surveys, and advanced practices as well as research findings should be actively adopted. Article 21 Management of anti-corrosion records 1. The Company’s Equipment Management Department shall establish and maintain records including corrosion inspection records for equipment and pipelines prone to corrosion, as well as shutdown investigation reports ； Report on the application of new technologies, new materials, new experiences, and new achievements ； Reports on accidents caused by corrosion, etc. 2. The equipment management departments of secondary units shall establish and maintain records including: the unit’s annual anti-corrosion plan ； “Statistical Table on Corrosion Prevention for the “One Removal, Three Injections” Process ； Table of Corrosive Agents in Crude Oil ； Corrosion inspection records and shutdown investigation reports for equipment and pipelines prone to corrosion ； Sulfur distribution maps of key units, acid value distribution maps, as well as various corrosion-related test data such as analysis of triple-top condensate water, salt content before and after electrodialysis, chloride ion content, sulfur content, and acid value ； Completion documents for anti-corrosion works ； Report on the application of new technologies, new materials, new experiences, and new achievements ； Inspection status of process corrosion prevention, etc. 3. The records that should be established and kept in the production workshop include: a list of equipment prone to corrosion, pipelines, valves, flanges, bolts, elbows, etc., as well as a three-dimensional diagram of the pipelines ； “Statistical Table on Corrosion Prevention for the “One Removal, Three Injections” Process ； Records of equipment and pipeline corrosion inspections as well as shutdown investigation reports for this workshop ； Schematic diagrams for pipeline thickness measurement in this workshop, pipeline layout diagrams, equipment thickness measurement schematics, etc. Article 22: A monthly meeting system shall be established, whereby the Corrosion Protection Technology Center regularly organizes relevant personnel to hold regular corrosion meetings to discuss issues related to fluctuations in raw materials, process adjustments, and equipment corrosion. In the event of serious equipment corrosion problems, special meetings shall be convened. Article 23: To meet the needs of processing high-sulfur crude oil, all secondary units shall earnestly implement the \"One Opinion and Three Regulations\" issued by the group company, and take proper measures to prevent equipment corrosion. Chapter 4: Project Construction and Acceptance Article 24: The construction of anti-corrosion projects and the quality inspection thereof must comply with relevant regulations, procedures, and standards set by ** and the group company. For corrosion protection construction, it is necessary to select a construction team that possesses the appropriate qualifications for such work, strong technical capabilities and equipment, as well as a track record of successful projects. Article 25: Thorough preparation work must be carried out before construction begins. 1. The design technical briefings must be completed, and the construction drawings must be reviewed. 2. The construction contractor shall carefully prepare a construction plan in accordance with the requirements, and this plan must include the construction technical measures to be taken when working under abnormal weather conditions. 3. Construction management personnel and workers must receive professional technical training to meet the technical and safety requirements of on-site construction. 4. Construction tools and testing instruments must meet the requirements of on-site construction. 5. Verify that the materials used for corrosion prevention work meet the design requirements, and that their quality satisfies ** or relevant industry standards. For new materials and products, in addition to undergoing quality inspections upon arrival at the factory, it is also necessary to verify whether they possess technical certification documents issued by the relevant authorities. Article 26: Engineering management departments and construction units shall organize the construction management of anti-corrosion projects carefully, strictly adhere to relevant technical specifications and construction methods, and ensure the quality and safety of the construction. The construction of important anti-corrosion projects should be entrusted to a third party with the appropriate qualifications for quality supervision. Article 27: Strengthen the quality inspection and acceptance of anti-corrosion engineering projects. 1. Each construction step must undergo intermediate quality inspections, and a comprehensive quality inspection must be carried out upon completion of the construction. 2. The general contractor responsible for the construction of anti-corrosion projects shall be fully accountable for the quality of the work; upon completion of the project, it is necessary to provide complete as-built documents in a timely manner as required. Chapter 5: Use and Maintenance Article 28: When establishing equipment records, various departments must include information related to corrosion prevention. Equipment anti-corrosion records, such as accurate and complete corrosion data records and corrosion failure records that can be accessed at any time, should be established. Article 29: For equipment equipped with anti-corrosion measures, the user must operate it in strict accordance with the operating procedures. When the process conditions change, corresponding measures should be taken to prevent the corrosion protection measures of the equipment from becoming ineffective. Article 30: The maintenance and repair of non-metallic anti-corrosion linings on equipment shall be carried out in accordance with SHS 03058, \"Procedures for the Maintenance and Repair of Non-Metallic Anti-Corrosion Linings on Chemical Equipment.\" Article 31: Attention should be paid to and efforts should be made to strengthen the corrosion protection of the external surfaces of equipment. Corrosion protection treatments for these external surfaces shall be carried out in accordance with the conditions of corrosion on the equipment, following the requirements of SHS 01034 \"Procedures for Painting and Maintenance of Equipment and Piping\". Article 32: For devices and equipment that have been out of use for a long time, corresponding anti-corrosion measures should be taken based on their characteristics to provide protection, and any damage that has occurred should be repaired promptly. Chapter 6 Corrosion Inspection and Monitoring Article 33 To meet the corrosion prevention needs of oil refining and chemical production facilities where corrosion is relatively severe, various units shall establish a corrosion monitoring network based on the distribution pattern of corrosive agents along the process flow, strengthen the inspection and monitoring of equipment corrosion, and provide a basis for the maintenance and proper operation of such equipment. Article 34: The equipment management departments of secondary units shall, based on the actual circumstances, organize the preparation of plans and layout diagrams for equipment corrosion monitoring within their respective units. They shall establish monitoring records, promptly organize the data, and create a systematic and comprehensive monitoring database. Using this database, they shall analyze the corrosion situation, calculate the corrosion rate, and propose measures to prevent corrosion. Article 35: In light of the characteristics of the production process, strengthen the monitoring and analysis of the content of corrosive substances in materials, establish a regular analysis system, and strictly control the level of such corrosive substances. Article 36: The equipment management departments of secondary units shall maintain records of the distribution of key corrosive agents such as hydrogen sulfide along the process flow. In particular, for those devices manufactured from high-strength steel materials and exposed to high levels of hydrogen sulfide in the surrounding environment, the equipment management departments must arrange for sampling and analysis of hydrogen sulfide levels at least once a month, as well as for the compilation of relevant data. In the liquefied petroleum gas, propylene, and other substances that enter the spherical tank, the hydrogen sulfide content must not exceed the values specified in the design requirements; the equipment management department must enforce strict controls and carry out thorough evaluations. Article 37: Parameters in the process flow that reflect the degree of equipment corrosion and the corrosivity of the media (such as iron ion content, chloride ion content, hydrogen sulfide content, pH value, dew point temperature, etc.) should be analyzed regularly, and process operations should be adjusted promptly based on the analysis results. Article 38: For equipment equipped with electrochemical corrosion protection methods such as cathodic protection, the effectiveness of this protection should be checked regularly, and the protection parameters should be adjusted in a timely manner based on the results of these checks. Chapter 7: Process Corrosion Prevention Management Article 39: To reduce and prevent corrosion of equipment caused by process media, all units shall actively implement process corrosion prevention measures. It mainly includes the following: removing certain medium components that cause equipment corrosion, such as desalination and desulfurization in oil refining, and oxygen removal in steam production ； Add corrosion inhibitors and neutralizers that can reduce or suppress corrosion, as well as a third component that can reduce or suppress corrosion ； Select and maintain process conditions that can reduce or prevent corrosion, such as appropriate temperature, pressure, component ratios, pH value, flow rate, etc ； Other process conditions that can mitigate and suppress corrosion. Article 40: All units shall establish process anti-corrosion management systems and improve their management frameworks and responsibility systems. The technical management department, equipment management department, material and logistics department, user units, inspection units, etc., work together to form a comprehensive management network. Article 41: Strengthen the testing and analysis of corrosive substances in various chemical raw materials entering the plant. For crude oil, tests and analyses should be conducted on parameters such as sulfur content, salt content, acid value, nitrogen content, and heavy metal content, so as to adjust the corrosion prevention measures in a timely manner. Article 42: The production technology department shall regularly inspect the implementation of anti-corrosion measures as specified in technical documents such as process technologies and operating procedures, as well as process cards. It should strengthen the daily management of process anti-corrosion measures and address promptly any issues that arise during their application. Process anti-corrosion measures must operate in sync with the startup and shutdown of the plant. Article 43: The two atmospheric and vacuum distillation units in the refining department adjust the \"one removal and three injections\" operation in a timely manner based on the test data of the three types of water, thereby reducing equipment corrosion. Strictly follow the control parameters specified for the electrodesalination process in the equipment’s process card, and adjust factors such as water injection volume, desalination temperature, electric field strength, and the amount of demulsifier added in a timely manner to improve the efficiency of electrodesalination. Article 44: The equipment management department shall conduct follow-up inspections on the effectiveness of the process corrosion prevention measures, and promptly provide the technical department with the results of these inspections, so as to offer a reliable basis for improving the efficiency of process corrosion prevention and for selecting appropriate corrosion inhibitors. Chapter 8 Inspections and Assessments Article 45 The Company’s Equipment Management Department shall organize relevant units to conduct regular inspections and assessments of the corrosion prevention measures for major production facilities and key equipment, as well as the implementation of corrosion prevention regulations. Article 46: The equipment management departments of secondary units shall regularly inspect the corrosion monitoring status of equipment such as those used for thickness measurement, as well as the condition of the equipment’s anti-corrosion facilities. Article 47: The production technology department shall conduct monthly inspections of the control status of technical indicators related to process corrosion prevention for each unit, as well as the use of corrosion prevention agents and the quality inspection results. The main reference documents include Sinopec’s “Management System for Equipment in Sinopec”, Sinopec’s “Regulations on Strengthening Corrosion Inspection of Refining Units”, Sinopec’s “Regulations on Thickness Measurement of Equipment and Pipelines Used in Units Processing High-Sulfur Crude Oil”, Sinopec’s “Regulations on Anti-Corrosion Techniques for Storage Tanks Used in Units Processing High-Sulfur Crude Oil”, Sinopec’s “Guidelines on Material Selection for Equipment and Pipelines in Use in Certain Units Processing High-Sulfur Crude Oil”, the “Guidelines for Design and Material Selection of Key Equipment in Units Processing High-Sulfur Crude Oil” SH/T 3096, the “Regulations on External Anti-Corrosion Design of Chemical Equipment and Pipelines” HG/T 20679, the “Technical Regulations for the Design of Lined Steel Vessels” HG/T 20678, “Chemical Equipment with Rubber Linings” HG/T 20677, “Chemical Equipment with Brick and Plate Linings” HG/T 20676, “Rust Grades and Rust Removal Grades on Steel Surfaces Before Painting” GB 8923, the “Specifications for Construction and Acceptance of Anti-Corrosion Projects for Chemical Equipment and Pipelines” HGJ 229, the “Specifications for Construction and Acceptance of Building Anti-Corrosion Projects” GB 50212, the “Quality Inspection and Evaluation Standards for Building Anti-Corrosion Projects” GB 50224, the “Maintenance and Repair Procedures for Non-Metallic Anti-Corrosion Linings on Chemical Equipment” SHS 03058, and the “Technical Specifications for Anti-Corrosion Coatings on Petrochemical Equipment and Pipelines” SH 3022