【Q&A Question 061】2017.03.02
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This post was last edited by 955559 on 2017-7-21 22:24. [Q&A Question No. 061] What tasks should be carried out when stopping the pump for maintenance on 2017.03.02? The reference answers will be visible after responding; points are awarded by identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) a. Close the inlet and outlet valves to drain the liquid remaining in the pump. b. If there is sealed quench steam, the steam should be shut off. c. The dry liquid hydrocarbons must be thoroughly rinsed with water to meet the requirements. d. Close the cooling water valve of the cooler. e. Inform the electrician to cut off the power supply. 2017 Q&A Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html Third Phase of HAICHUAN Outstanding Management Members Selection Contest http://bbs.hcbbs.com/thread-1655902-1-1.html (Source: HAICHUAN Chemicals Forum)
a. Close the inlet and outlet valves to drain the liquid remaining in the pump. b. If there is sealed quenching steam, shut off that steam as well. c. For dry liquid hydrocarbons, rinse them thoroughly with water until they are of acceptable quality. d. Turn off the cooling water for the cooler. e. Inform the electrician to cut off the power supply.
Before maintaining the pump, close the inlet and outlet valves of the pump, drain all the fluid inside it and purge it thoroughly. For hot oil pumps, wait until the pump body has cooled down before stopping the cooling water supply.
1. Power off and lock； 2 Pressure relief and evacuation, displacement ； 3. Blind plates may need to be added depending on the operating conditions ； 4 Prepare work orders and get ready for the task.
a. Close the inlet and outlet valves to drain the liquid remaining in the pump. b. If there is sealed quench steam, the steam should be shut off. c. The dry liquid hydrocarbons must be thoroughly rinsed with water to meet the requirements. d. Close the cooling water valve of the cooler. e. Inform the electrician to cut off the power supply.
1. The material must be completely drained. 2. Replace the pump body. 3. Turn off the power supply. 4. Help with the preparation work for repairs.
The inlet and outlet valves are closed; the medium is drained and replaced. There is shielding steam in place, and attention is paid to wind direction. The levels of flammable and toxic hazardous gases have been found to be within acceptable limits. The work order has been prepared, and there is a dedicated person overseeing the operation
1) Close the inlet and outlet valves to drain the liquid remaining in the pump. 2) If there is sealed quenching steam, the steam should be turned off. 3) The dry liquid hydrocarbons must be thoroughly rinsed with water to meet the requirements. 4) Close the cooling water valve of the cooler. 5) Inform the electrician to cut off the power.
1. Close the pump outlet. 2. Drain the medium inside the pump. 3. If there is nitrogen or steam, use it to purge the pump. 4. Lock and tag the pump’s inlet and outlet to isolate them. 5. Tag the pump’s control panel to cut off power. 6. Lock and tag the pump control switch in the distribution cabinet and cut off power there as well. 7. Notify the maintenance team to repair the pump
a. Close the inlet and outlet valves to drain the liquid remaining in the pump. b. If there is sealed quench steam, the steam should be shut off. c. The dry liquid hydrocarbons must be thoroughly rinsed with water to meet the requirements. d. Close the cooling water valve of the cooler. e. Inform the electrician to cut off the power supply.