Operating procedures for common chemical machinery

Formulated according to material reaction and equipment parameters.

learn first* General operating procedures for general equipment, individual special equipment requires special learning * .

Chemical machinery is mainly about the operating procedures of transmission equipment, and there is not much else.

There are many types of chemical machinery and equipment. Different models and specifications have different operating points. Specific equipment is required, and operating procedures pay special attention to the relationship between general and individual.

Operating procedures are generally written according to the equipment instruction manual, plus the actual operating parameters of the equipment.

Operating procedures are generally compiled based on the instructions for use and the requirements of the process and production characteristics. The operating procedures for the same equipment may be different in different process locations.

Centrifugal pump operating procedures 1. Starting and stopping of the pump. 1.1 Before starting the pump each time, turn the coupling by hand. It should feel easy and even in weight. Pay attention to whether there is any noise in the pump, whether the connections are loose, and whether there is leakage at each seal. If so, try to eliminate it. 1.2 After the motor is disconnected and inspected, check whether the running direction of the motor is consistent with the rotation mark of the pump. 1.3 Check whether the bearing lubricating oil is within 2 mm above and below the center oil line. The brand of lubricating oil is 46# mechanical lubricating oil. 1.4 Close the outlet valve, open the inlet valve, and pour enough fluid into the pump to prevent evacuation of the pump without liquid. If there is a vent valve, you can open the vent valve until liquid flows out, and then close the vent valve. Close the pressure gauge needle valve. 1.5 Start the motor. After the pump operates normally, first open the needle valve of the pressure gauge, then slowly open the outlet valve, and adjust the opening of the outlet valve according to the output pressure. 1.6 The pump should not be operated for more than 1 minute with the outlet valve closed to prevent the pump from holding back pressure and causing seal leakage. 1.8 When stopping the pump, first close the outlet valve, then cut off the power supply, close the pump inlet valve and the pressure gauge needle valve. And sweep the line as required. 2. Pump operation. 2.1 If it is found that the motor is overloaded and must continue to work, the outlet valve must be closed to reduce the flow of the pump (in order to reduce power) so that the pump can still work normally. 2.2 During operation, if vibration or abnormal sound is found, the machine should be stopped immediately for inspection and normal operation can only be carried out after the fault is eliminated. 2.3 It is never allowed to use the valve on the suction pipeline to adjust the flow to avoid cavitation and cause the pump to evacuate. 2.4 The pump is generally not suitable for continuous operation at less than 30% of the design flow rate. If it must be operated continuously under this condition, a bypass pipe should be installed on the inlet and outlet pipelines to adjust the flow rate to the specified use range of the pump. 3. Maintenance points of centrifugal pumps. 3.1 Always check the temperature rise of the pump and motor. The bearing temperature rise should not be greater than 40°C, and the limit temperature should not be greater than 70°C. 3.2 Always pay attention to whether the amount of oil stored in the bearing seat is within the specified range. In order to keep the oil clean and well lubricated, new oil should be replaced regularly. Under normal circumstances, all oil should be replaced with new oil after every 1500 hours of operation. 3.3 The outside of the pump and the environment should be kept clean at all times. When flushing with water, the motor should be protected from moisture. After flushing, wipe the water traces on the pump with a cloth. 3.4 If the pump has been out of use for a long time, the pump body needs to be rinsed with clean water, especially the sealing parts, and the inlet and outlet of the pump must be sealed and properly stored.

Water ring vacuum pump operating procedures 1. Preparations before starting The storage period is too long (more than three years in a good storage environment； For vacuum pumps that have been stored in a poor environment for more than two years), the grease in the bearings should be replaced before starting. 1. Crank the pump before starting it. While turning the opposite wheel, check whether the turning is easy, whether the sound is normal, and whether there is any jamming. ； 2. Open the vacuum pump water supply valve until water flows out from the drain valve so that the vacuum pump reaches the starting water level requirement. If there is still no water flowing out for a long time, the pipe or drain valve may be clogged. If you drive at this time, the vacuum pump will be damaged. ； 2. Start-up 1. Properly adjust the vacuum pump water inlet valve so that the vacuum pump has a suitable amount of water. (If the amount of water entering the vacuum pump is too large, the load on the pump will also be large, and the vacuum degree will become smaller. ； If the water inflow is too small, a water ring cannot be formed and the vacuum cannot be drawn. ； ) 2. Fully open the vacuum pump exhaust valve, slightly open the air inlet valve, and start the vacuum pump ； 3. Adjust the opening of the vacuum pump air inlet valve and system vent valve to control the vacuum degree of the pumped system at around -0.08MPa. ； 3. Shutdown 1. First close the intake valve to only 15%, press the stop button and close the intake valve ； 2. Close the water supply valve ； 3. If the machine is shut down for more than two days, the cleaning drain valve and the low-position drain plug should be opened to drain the accumulated water in the pump and pipelines (if there is a possibility of freezing, this must be done before shutting down). 4. Standby pump shift 4. Main points of vacuum pump maintenance 1. Is the temperature of the motor bearing normal? The bearing temperature should not exceed 50°C, and the maximum measured temperature should not exceed 75°C.℃ ； 2. Is the water supply of the pump normal? 3. Is the drainage temperature normal? The temperature rise of the inlet and outlet water of the pump generally does not exceed 5°C. 4. Whether the main performance parameters of the pump are normal. 5. If any abnormality is found during operation, stop the machine immediately for inspection. After the fault is eliminated, restart according to the regulations. 6. The bearing grease is lubricated with calcium-based grease, and the amount of grease accounts for about 1/3 of the bearing oil chamber.

The above are the operating procedures for centrifugal pumps and vacuum pumps in my unit. Post them here for everyone to discuss and learn from.* one time.

Catalog of centrifugal pump maintenance management regulations 1 General principles 1.1 Scope 1.2 Referenced norms and standards 2 Maintenance procedures 2.1 Maintenance work content 2.2 Technical preparation before maintenance 2.3 On-site maintenance preparation 2.4 Maintenance plan 2.4.1 Failure maintenance plan 2.4.2 Minor repair plan 2.4.3 Major repair plan 3 Main technical requirements 3.1 Bearing 3.2 Packing gland 3.3 Oil ring 3.4 Pressure reducing ring and intermediate support 3.5 Coupling and concentricity 3.6 Impeller, shaft and bushing, pump body and rotor 3.7 Seal 4 Precautions 4.1 Inspection precautions 4.2 Precautions before commissioning 4.3 Precautions for trial operation 5. Safety and environmental protection measures 5.1 Basis 5.2 Operation hazard analysis and countermeasures 5.3 Implementation measures 6. Supporting documents (refer to the maintenance operation instructions) 6.1 Maintenance operation ticket 6.2 Power outage ticket 6.3 Hot Work Ticket 6.4 Maintenance Record Form 6.5 Completion Report 1 General Principles 1.1 Scope This maintenance instruction is provided for the maintenance of centrifugal pumps in the first guaranteed transportation area of xxxxx Company. Technical personnel and maintenance personnel should perform maintenance based on the actual on-site conditions and the manufacturer's technical data during the actual process. 1.2 Referenced specifications and standards GB50231-98 General specifications for construction and acceptance of mechanical equipment installation projects GB50275-98 Specifications for construction and acceptance of compressor, fan, pump installation projects Mechanical Engineer's Manual Equipment Installation Technology Practical Manual (upper and lower) Manufacturer's centrifugal pump operation, repair and maintenance manual 2 Maintenance procedures 2.1 Maintenance work content 2.1.1 Centrifugal pump maintenance is divided into two parts: On-site repairs and workshop repairs. Maintenance and minor repairs of large pumps are generally performed on site ； For medium and overhaul of small pumps, they are usually disassembled and transported back to the workshop for repair. 2.1.2 For small and medium-sized centrifugal pumps, intermediate maintenance is generally not arranged. Except for regular overhaul, it is temporary minor repair. The overhaul cycle is generally 12-18 months of continuous operation, and the maintenance cycle is generally determined according to actual operating conditions. 2.1.3 Centrifugal pump overhaul and minor repair items (see Table 2-1) Table 2-1 Centrifugal pump major repair item number Minor repair number Overhaul 1 Check and repair bearings 1 Including minor repair items 2 Deal with seals 2 Disassemble and check the degree of damage to each part 3 Check the concentricity 3 Check the curvature of the main shaft and straighten it if necessary 4 Check and repair the cooling water system 4 Repair or replace parts that do not meet the standards, including pump body casting and replacement of sliding bearings 5 Deal with defects and loopholes that occur during operation 5. Adjust the sway of the rotor and find dynamic and static balance if necessary 6. Measure the concentricity of the rotor and stator 7. Inspect the ancillary equipment of the main pump unit 2.2 Technical preparation before maintenance 2.2.1 Personnel: Construction personnel must have employment certificates, have basic professional knowledge and maintenance skills and have engaged in similar work. 2.2.2 Machinery and tools: Machinery and tools used for construction must be inspected and calibrated before use. Commonly used maintenance tools include hydraulic shaft pullers, reverse chains, bearing heaters, common bench tools (various wrenches, screwdrivers, flat shovels, scrapers, hand hammers, etc.), vernier calipers, outer diameter micrometers, inner diameter micrometers, dial indicators, magnetic meter holders, etc. When necessary, various machining equipment and electrical welding equipment are required. 2.2.3 Materials: Confirm that all materials required for construction are available. All construction materials must be obtained from the warehouse through prescribed procedures. In this way, the quality of construction materials can be ensured through the control of supply channels, procurement processes, warehouse management and other links. Any materials and accessories obtained through other channels are prohibited from being used in construction. 2.1.4 Construction plan: The maintenance operation plan shall be prepared and approved by technical personnel and shall be signed and approved by the relevant technical supervisor of the owner. Operators must be familiar with the specifications, standards, construction content, and construction steps cited in the construction plan, and put forward targeted opinions and measures based on their understanding of the project. 2.2.5 Security risk analysis: Through HSE risk analysis, the main risks are identified and corresponding countermeasures are proposed. 2.2.6 Construction safety confirmation: Confirm whether the construction safety hazards raised during the construction have been eliminated. For suspicious points that cannot be eliminated in time but may cause major accident risks, the construction can be suspended, written records should be kept, and the relevant responsible persons should be notified in a timely manner. ； For environments and construction sites where there are hidden dangers and where construction is to be carried out, opinions must be given in a timely manner, and relevant responsible persons on site shall be notified, and necessary preventive and control measures shall be taken through the efforts of both parties. If an accident occurs during construction, emergency remedial methods and measures must be taken to minimize the hazard of the accident. These measures must be approved by the owner before construction can begin. 2.3 Preparation for on-site maintenance 2.3.1 Maintenance personnel can only carry out maintenance operations after completing relevant signature confirmations according to the work content of the maintenance operation ticket. For special operations, a special operation permit must be obtained. Special assignments include but are not limited to: Hot work, work at height, work in restricted space, isolation work, etc. 2.3.2 The centrifugal pump should be shut down and isolated from the system by the owner's operator, and pressure relief, venting, cooling, purging, replacement, etc. should be carried out, and then confirmed by on-site operators and maintenance personnel. 2.3.3 The power supply to the motor should be disconnected by the electrical operator, and a "Maintenance in Progress" sign should be hung. The maintenance personnel should conduct a second confirmation. 2.3.4 Maintenance personnel should check and confirm the temperature of the medium inside the machine. Construction can only be carried out after the temperature drops to normal temperature. 2.3.5 Maintenance personnel check the internal pressure to see if the pointer of the pressure gauge points to the zero position. 2.4 Maintenance plan 2.4.1 Failure maintenance plan 2.4.1.1 Failure forms and causes (1) The pump cannot output liquid a. The pump does not inject enough liquid. b. There is air in the pump suction pipe. c. The suction height of the pump exceeds the allowable range. d. The resistance of the pipeline is too large. e. There is foreign matter blocking the pump. (2) The pump flow is insufficient or the lift is too low a. The impeller is corroded, the flow channel is corroded, and the orifice ring clearance exceeds the standard. b. The pipeline resistance is too large. c. There is foreign matter blocking the pump. d. There is air leakage in the pump body or suction pipe. (3) Excessive current (overload when the pump is running) a. The packing of the packing pump is pressed too tightly. b. Friction occurs between the rotating part and the stationary part. (a). The curvature of the shaft exceeds the allowable value. (b) The mouth-ring gap is too small. (c) The bulkhead bolts are unevenly strong. (d) The axial displacement of the pump shaft is too large, causing friction between the impeller end face and the casing end face. (4) Bearing overheating a. The oil is too dirty, contains impurities, and lacks oil. b. The bearing assembly is incorrect. c. The bearing is excessively worn or damaged. (5) Pump vibration is too large a. The back pressure of the pump inlet and outlet pipelines is too large. b. There are problems with the quality of pump installation and maintenance. c. The coupling is not properly aligned. d. There is a large gap between the inner and outer rings of the bearing, the shaft, and the inner hole of the bearing box. e. The mass of the rotor is unbalanced. (6) Seal leakage a. There is a problem with the quality of seal installation. b. The seal is damaged. c. The end face specific pressure is too small. 2.4.1.2 Faulty component analysis (1) Bearing damage. (2) The shaft is deformed and bent. (3) The impeller is deformed or damaged. (4) The pump casing is damaged or deformed. (5) The seal is damaged. (6) There is air leakage or foreign matter in the flow channel. 2.4.1.3 Fault maintenance processing (1) Based on the inspection and analysis of the fault phenomenon, determine the location and components of the fault, and initially determine the maintenance content ； (2) Handle operation tickets and power outage tickets, close the inlet and outlet valves, relieve pressure, vent, purge or replace, cool down, and confirm them ； (3) Disassemble the faulty parts, inspect and measure them, and analyze and determine the cause of the fault. ； (4) Carry out necessary measurements, repairs and replacements ； (5) After reassembly, conduct acceptance test run and sign ； (6) For large centrifugal pumps or major fault repairs required by the owner, a maintenance report must be written and submitted for archiving in a timely manner. 2.4.2 Minor repair plan (1) Apply for work tickets and power outage tickets, close the inlet and outlet valves, relieve pressure, vent, purge or replace, cool down, and confirm them ； (2) Disassemble the mechanical seal, check the dynamic and static rings, springs, sealing rings (gaskets), and bushings in detail, find out the cause of leakage, and make necessary measurements, repairs, and replacements. ； (3) Disassemble the bearing, check in detail whether the bearing, shaft, and bearing box are running or holding the shaft, whether the rolling elements, inner and outer rings, cages, and sleeves are intact, whether the bearing clearance exceeds the standard, and find out the corresponding reasons, and make necessary measurements, repairs, and replacements. ； (4) Eliminate leakage in pipelines and pipeline flanges of pump washing cooling water, lubricating oil and oil seal systems ； (5) Clean the pipelines and equipment of the cooling water, lubricating oil and oil seal systems ； (6) Replace lubricating oil ； (7) After reassembly, correct the concentricity of the pump shaft and the motor shaft. ； (8) Carry out acceptance test run and sign ； (9) For large centrifugal pumps or minor repairs required by the owner, a maintenance report must be written and filed in a timely manner. 2.4.3 Major repair plan (taking the cantilever pump as an example) (1) Apply for work tickets and power outage tickets, close the inlet and outlet valves, perform pressure relief, venting, purging or replacement, cooling, and confirm them. Toxic and harmful media should be purged or replaced. For high-temperature media, the temperature should be cooled to normal temperature by blowing ； (2) Use an oil pot or oil basin to receive the bearing box lubricating oil and store it centrally. Disassemble the coupling cover, coupling and pump-attached cooling water, sealing oil, and lubricating oil pipelines. Find the concentricity data before maintenance, and make matching marks before disassembling the coupling to facilitate smooth reassembly. ； (3) Loosen the bearing box leg anchor screws ； (4) Loosen the screws connecting the pump body, pump base, and inlet and outlet flanges (this step needs to be considered when the small pump is disassembled as a whole and returned to the workshop for maintenance) ； (5) Disassemble the mechanical seal gland (measuring compression) and the connecting screws of the pump body large cover (for safety reasons, leave the two seal gland bolts and nuts incomplete and use a screwdriver to pry them open to check whether there is pressurized medium leaking from the valve in the pump body) ； (6) Lift down the pump rotor, bearing box, pump cover and sealing guide chain as a whole (small pumps can be lifted down by people) ； (7) Remove the connecting screws of the impeller back cap, impeller, mechanical seal and bearing gland, and pull out the pump bearing rotor. ； (8) Disassemble the pump wheel and bearings ； (9) Clean, inspect/measure all parts in detail, check the wear and corrosion, and then determine the repair method: a. Check the sleeves, bearings, stuffing box, pressure reducing ring, oil sealing ring, impeller, screw back cap, etc., and make records. b. Check the dynamic and static balance of the measuring rotor (if necessary). c. Measure the concentricity and curvature of the shaft. d. Determine the parts to be replaced or repaired based on the inspection and measurement results. (10) Assemble the pump in the reverse order of disassembling the pump, and the coordination of each component should meet the technical requirements. (11) Connect the motor and pump and perform alignment. (12) Carry out acceptance test run and sign ； (13) Write a maintenance report and submit it for archiving in a timely manner. 3． Main technical requirements 3.1 Bearing a. The ovality and shaft diameter taper of the bearing cannot be greater than 0.02. b. The roughness of the shaft diameter surface should be less than 1.6µm. c. The contact area between the shaft diameter and the bearing bush should not be less than 60-90º. d. The fit between the thrust rolling bearing and the shaft that does not bear radial load should meet the requirements in Table 1. Shaft diameter (mm) 18-30 30-50 50—80 80—120 120—180 Clearance (micron) +7— -30 +8—35 +10—40 +12—41 +14—54 Table 1. Coordination of thrust rolling bearing and shaft e. Under normal circumstances, the sliding bearing clearance is 0.0015—0.002 times the diameter of the pump shaft. The clearance between the main shaft of the sliding bearing and the upper shoe is measured using the lead wire method. The clearance on both sides is half of the upper clearance. The requirements in Table 2 should be met. Table 2 Sliding bearing clearance Shaft diameter (mm) 18-30 30-50 50-80 80-120 120-180 Clearance (micron) 27-60 45-100 75-160 120-240 180-320 f. The clearance of the rolling bearing should meet the requirements of Table 3. Table 3 Radial clearance units of bearings: Millimeter shaft diameter (mm) 20-30 35-50 55-80 85-120 125-150 New ball bearing 0.01-0.02 0.015-0.025 0.015-0.025 0.025-0.035 0.025-0.035 New column bearing 0.035-0.055 0.055-0.065 0.06-0.08 0.075-0.15 0.15-0.17 Limit value 0.1 0.2 0.2 0.3 0.3 g. The sliding bearing tightening force is 0.015-0.020 mm, and the rolling bearing tightening force is -0.015--+0.015 mm. 3.2 Packing gland a. The diameter gap between the packing gland and the shaft sleeve is 0.75-1.0 mm. b. The gap between the outer diameter of the packing gland and the stuffing box is 0.1-0.15 mm. c. The mechanical seal gland rubber pad should be 1.50-2.50 mm higher than the contact surface. 3.3 Oil ring a. The gap between the oil seal ring and the shaft sleeve is 1.00-1.50 mm. b. The outer diameter gap between the stuffing box and the oil seal ring is 0.15-0.20 mm. 3.4 Pressure reducing ring and intermediate support a. The diameter gap between the intermediate support and the shaft sleeve is 0.65-1.00 mm. b. The diameter gap between the pressure reducing ring and the shaft sleeve is 0.52-1.25 mm. 3.5 Coupling and concentricity a. Coupling and shaft diameter are transitional fits as shown in Table 4. Table 4 Coupling and shaft diameter matching shaft diameter (mm) 18-30 30-50 50—80 80—120 120—180 Clearance (micron) +17 -20 +20 -23 +22 -26 +26 -31 +30 -35 b. Pin rubber ring The rubber ring of the coupling is 0.15-0.35 mm smaller than the hole diameter, and the axial clearance is 2-6 mm. c. Concentricity standard (circumferential/axial): Diaphragm type 0.15/0.10, gear or pin rubber ring type 0.08/0.06, rigid type 0.06/0.04. 3.6 Impeller, shaft and sleeve, pump body and rotor a. The thickness of the impeller key is 0.15-0.35 mm smaller than the keyway depth. b. The shaft diameter is allowed to bend no more than 0.015 mm. The middle part of the low-speed pump shaft shall not be larger than 0.07 mm, and the middle part of the high-speed pump shaft shall not be larger than 0.04 mm. c. The fit between the shaft and the sleeve should be as shown in Table 5. Table 5: Fitting diameter of shaft and sleeve (mm) 18-30 30-50 50—80 80—120 120—180 Clearance (micron) +36 0 +40 0 +51 0 +62 0 +88 -0 d. The rotor shaft diameter shake is not greater than 0.015 mm, and the shaft sleeve is not greater than 0.02 mm. e. The oscillation of the impeller mouth ring shall not be greater than 0.04 mm, and the axial oscillation of the impeller end face shall not be greater than 0.23 mm. f. Pump body level: The axial cold oil pump is 0.15-0.25 mm, the hot oil pump is less than 0.10 mm, the transverse cold oil pump is 0.05-0.12 mm, and the hot oil pump is less than 0.15 mm. 3.7 Seal a. The compression amount of the mechanical seal spring of the pump is 3-6 mm, and the end face specific pressure is 0.3-0.6MPa. b. Allowable leakage, light oil medium: Mechanical seal is 10 drops/minute, packing is 20 drops/minute ； Heavy oil medium: Mechanical seal 5 drops/minute, packing 10 drops/minute. 4. Precautions 4.1 Maintenance Precautions a. Use special tools when disassembling couplings and rolling bearings to avoid damaging the parts. b. The shell and bearing should be in close contact. c. The end face of the packing gland must be perpendicular to the shaft. d. The outer diameter of the oil seal ring is perpendicular to the end face. e. There is no scale, oil stain, cracks, etc. on the impeller surface. f. The key and keyway must be in close contact, and no additional pads are allowed. g. When tightening various screws, tighten them symmetrically and apply force evenly. h. When the bearing bush is compressed in the bearing body, excessive tightening force will cause the bearing bush to deform. ； If the tightening force is too small, the upper shaft will jump after the pump is started. i. The rolling elements and raceway surfaces of rolling bearings should be smooth and free of peeling. It rolls flexibly, rotates smoothly, slows down slowly and then stops running without vibration. j. When replacing the impeller, static balance should be found. k. When disassembling the mechanical seal, do not use a flat shovel, knock it, or damage the moving ring, stationary ring and sealing ring. l. When installing the mechanical seal, you should first determine the fixed position of the transmission seat, then assemble the stationary part and the rotating part, and install the sealing end cover in the sealing body. 4.2 Precautions before commissioning a. Check whether the mechanical seal is installed properly. b. Check whether the process pipeline is intact. c. Perform a static pressure test on the mechanical seal to check for leakage. d. If the leakage is serious, it must be disassembled for inspection and reassembled. e. The static pressure test pressure can be equivalent to the pump outlet pressure. f. Turn the car to see if it rotates easily and flexibly. g. Add lubricating oil before test run. h. Check that the anchor screws are tightened and cooling water, lubricating oil, etc. are supplied normally. i. The hot oil pump must be preheated before starting, so that the temperature of the pump body is not lower than the inlet temperature by 40 degrees, and the preheating speed is 50 degrees/hour. j. When starting the centrifugal pump, close the outlet valve and open the inlet valve. 4.3 Precautions for trial operation a. The trial run must be run under load. b. The sliding bearing temperature shall not be greater than 70 degrees, and the rolling bearing temperature shall not be greater than 75 degrees. c. Check the vibration of the front and rear bearings. d. Check whether the packing is too tight or too loose. e. There should be no noise from various parts of the rotor. f. Cooling water, lubricating oil, and sealing oil are flowing smoothly without leakage. g. Flow and pressure are stable. h. Pay attention to the heating of the stuffing box. 5. Safety and environmental protection measures 5.1 Basis 1. "XXxxx Corporation Industrial Production Labor Safety and Health Management Regulations" 2. "Petrochemical Construction Safety Technical Regulations" (SH3505-1999) 3. Owner's safety regulations for on-site construction operations 4. "Safety Management Regulations for Lifting Operations" 5.2 Operation risk analysis and countermeasures 1. Conduct HSE risk analysis before operation, determine the main risks, and take corresponding measures. 2. Confirm the power outage, close the inlet and outlet valves for isolation, media pressure relief, venting, purging or replacement, cooling, etc. 2. Before work, it is necessary to confirm that the motor is powered off, and the electrician hangs a power outage maintenance warning sign on the operation cabinet. 3. Be careful when lifting the rotor to avoid being hit or bruised, and no one should stand underneath. 4. Hot work must issue a special work ticket of the corresponding level, implement safety conditions, and be supervised by a dedicated person. 5. Prevent lubricating oil, discharge media, and operating waste from contaminating the environment and the site. 5.3 Implementation measures 1. Construction workers of personal protective equipment should wear work shoes, safety helmets, gloves, goggles, etc. 2. Organizational measures 1) Strictly comply with various safety and environmental protection regulations for on-site operations of the cracking unit. 2) The person in charge of operations before construction should make work arrangements and hold safety meetings, and the person in charge of operations after construction should summarize the work. 3) Complete various safety work tickets before construction. 4) Set up full-time safety officers to inspect, supervise and implement safety issues. 5) Take protective measures during operation to ensure the safety of people and equipment, and to ensure that the environment is not polluted. 6) If any abnormal situation is encountered during construction, the relevant personnel of the owner should be contacted promptly for analysis and processing. 3. Emergency organization 1) Before working, operators should have a detailed understanding of the operating procedures and the corresponding actions that individuals should take in various emergency situations. 2) When an emergency occurs, the person in charge of the operation will direct emergency operations. 4. Pollution prevention 1) During construction operations, the project leader must designate personnel or safety officers to supervise the sanitary conditions of the work site. 2) All waste must be properly managed and disposed of. 3) Clean the site after the work is completed to ensure that the site is cleared of materials and materials. 6. Maintenance support documents 6.1 Maintenance work ticket 6.2 Power outage ticket 6.3 Hot work ticket 6.4 Maintenance record form 6.5 Completion report