English — Forum #723 (Page 570/642)

1. An abnormal noise occurred at the moment the stirring started - HCBBS Forum
2. Lime dosing issue - HCBBS Forum
3. Which one has 30% waste sulfuric acid? - HCBBS Forum
4. Operation of the vent valve during planned shutdown of the gasifier - HCBBS Forum
5. Latest exam updates - HCBBS Forum
6. The relationship between the concentration of ammonium bicarbonate and conductivity - HCBBS Forum
7. Which model of equipment is commonly used for hot work analysis and gas detection in confined space operations? - HCBBS Forum
8. SIL level of the SIS loop - HCBBS Forum
9. What are the regulations regarding the layout of the on-site level gauge and the remote level gauge connections on the equipment? - HCBBS Forum
10. Question 8, Case Analysis, Afternoon Session, Registered Chemical Engineering Exam 2011 - HCBBS Forum
11. Alarm on the small feeding line - HCBBS Forum
12. I have questions regarding biological phosphorus removal in wastewater treatment - HCBBS Forum
13. Questions regarding the considerations for replacing instrument brands - HCBBS Forum
14. Which design institute is good for organic amine exhaust gas absorption technology? - HCBBS Forum
15. Purpose of the quick-opening air valve in the heating furnace - HCBBS Forum
16. Mixed refrigerant - HCBBS Forum
17. I would like to ask about the process for operating Sinopec projects - HCBBS Forum
18. On the selection of inlet filters for piston compressors - HCBBS Forum
19. PX production from coal tar – a new route to coal-derived aromatics - HCBBS Forum
20. Where is the backwashing operation for the side filters there? - HCBBS Forum
21. mechanical minimum stop - HCBBS Forum
22. Arrangement of vortex suppressors - HCBBS Forum
23. Discussion on the tube bundle configuration of turbine condensers - HCBBS Forum
24. Is it available on the Tianjin University’s postgraduate entrance examination questions and answers forum? Help with the link! ! ! - HCBBS Forum
25. Regarding the calibration of radio frequency admittance level alarms - HCBBS Forum
26. 【Daily Question】Chemical Engineering Principles 124: Theoretical Drying Process (July 29) - HCBBS Forum
27. Questions regarding the annual inspection of pressure vessels - HCBBS Forum
28. Reason why raw water pressure testing cannot be used for stainless steel pipes - HCBBS Forum
29. What are the pressures of the high-pressure and low-pressure flares in a refinery? - HCBBS Forum
30. 【Daily Question】Question from Issue 20150730 - HCBBS Forum
31. Is it energy-efficient for a transformer to operate in this way? - HCBBS Forum
32. Regarding HART protocol communication - HCBBS Forum
33. Newbie’s troubles - HCBBS Forum
34. Introduction to the classification, applications, and selection of solenoid valves - HCBBS Forum
35. Discussion on stress analysis methods for fiberglass reinforced plastic pipes - HCBBS Forum
36. For newly installed units, the belts and fins of the air-cooled fans are always damaged. Has anyone encountered this issue? What are some solutions? - HCBBS Forum
37. Weekly topic: 5 wealth points for those who answer correctly, 2 wealth points for participation； Question 133 - HCBBS Forum
38. Regarding the issue of coke oven flue gas volume - HCBBS Forum
39. What is the main purpose of adding magnesium sulfate to fertilizers? Does it also have nitrogen-fixing capabilities? - HCBBS Forum
40. Calculation of Kv for gas control valves - HCBBS Forum
41. Daily Question 2015.7.29 (EIA Discussion): 3 Wealth points for replies, plus 5 Wealth points for correct answers (single-choice question) - HCBBS Forum
42. Hot weather has arrived, and screw air compressors are truly annoying! - HCBBS Forum
43. 【Basic Knowledge of Glossary Definitions for “Polymers and Materials”-012】Glossary definitions related to polymers - HCBBS Forum
44. Practical application of liquid sulfur degassing towers - HCBBS Forum
45. How is fees charged for individual design work? - HCBBS Forum
46. How to choose the flow-open and flow-close settings for control valves - HCBBS Forum
47. Requirements for X-ray inspection of boiler manhole rings - HCBBS Forum
48. What are good solutions for medium-voltage frequency converters to handle voltage fluctuations? - HCBBS Forum
49. Is a dew prevention heater still needed if an air conditioner is installed in the PLC control cabinet? - HCBBS Forum
50. Repair of control valves - HCBBS Forum
51. TP304 heat exchange tube - HCBBS Forum
52. “Haichuan Irrigation Co., Ltd. Convenience Store” – Has Wen Dou fooled you? - HCBBS Forum
53. With trim and seat in Monel. - HCBBS Forum
54. Regarding instrument grounding - HCBBS Forum
55. Seeking information on the types of heat transfer oil used in gas pipeline thermometers and temperature-sensing sleeves - HCBBS Forum
56. Establishment of equipment inventory records - HCBBS Forum
57. 【Daily Question】On August 8, in the absorption and stabilization system, the key to improving the C3 recovery rate lies in reducing ? in the dry gas - HCBBS Forum
58. 【Daily Question】2015.08.01 Welding joint coefficient (first 100 replies + 2 wealth points; additional 3–8 wealth points for correct answers) - HCBBS Forum
59. Generally, how does the pressure gauge reading change after the water pump is started? - HCBBS Forum
60. Material selection for low-temperature methanol washing piping - HCBBS Forum
61. Whether the plant interlock includes a new hydrogen machine or not - HCBBS Forum
62. Catalyst deactivation - HCBBS Forum
63. pH issue in electro-deionized water - HCBBS Forum
64. Is 10Cr13 included in the material? - HCBBS Forum
65. Academy member recommendations for pressure vessel manufacturing - HCBBS Forum
66. Problem of steam seal condensate water in back-pressure steam turbines - HCBBS Forum
67. One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 269 - HCBBS Forum
68. Pipeline installation height - HCBBS Forum
69. What are the reasons for the rapid pressure increase in the lithium bromide self-priming device? - HCBBS Forum
70. The low-voltage frequency converter cannot adjust speed at low frequencies - HCBBS Forum
71. I would like to ask the veterans on the chemical engineering forum about career choices - HCBBS Forum
72. Calculation of the high-level expansion tank for the ethylene glycol cooling system - HCBBS Forum
73. Selection of the hydrogen extraction PSA control system - HCBBS Forum
74. A question regarding the handling of lubricating oil - HCBBS Forum
75. Archives of completion documents for chemical engineering projects - HCBBS Forum
76. Active screen ion nitriding—a new ion nitriding technology - HCBBS Forum
77. 65%*ao Acid storage tank material - HCBBS Forum
78. The FINA World Championships are in full swing - HCBBS Forum
79. Several issues that arose during the startup of the hydrogenation unit - HCBBS Forum
80. A brief discussion on the formula for vanadium catalyst conversion rate - HCBBS Forum
81. There are quite a few gods related to seas and rivers; I hope for some advice - HCBBS Forum
82. Notice on the Republication of the List of Administrative and Service Fees Charged by Centrally Administered Human Resources and Social Security Departments - HCBBS Forum
83. On the relationship between liquidity and viscosity - HCBBS Forum
84. Selection of pressure gauges - HCBBS Forum
85. The five key skills that tend to decline in the workplace - HCBBS Forum
86. Blending of 93# gasoline - HCBBS Forum
87. Running water does not rot - HCBBS Forum
88. CAESAR 2: How to add a pump in a pipe segment? - HCBBS Forum
89. Breaking News – Beijing Wins the Right to Host the 2022 Winter Olympics - HCBBS Forum
90. Is it acceptable to hire a firefighter who has just started working in this department, has no prior experience in firefighting, and is 40 years old? - HCBBS Forum
91. I’m confused; who can enlighten me? - HCBBS Forum
92. Seeking help with problems in the ammonia synthesis reaction - HCBBS Forum
93. Waste catalyst recovery technology plan - HCBBS Forum
94. Discussion question: Why are two valves installed for the main fuel gas in the heating furnace? - HCBBS Forum
95. What are the types of groundwater pollution that you are aware of? - HCBBS Forum
96. Coating for the inner wall of vertical tanks - HCBBS Forum
97. Help me analyze whether this phenomenon with the control valve is normal or a problem on the customer’s end - HCBBS Forum
98. Remaining ammonia water COD - HCBBS Forum
99. Besides CAD & 3D drafting and PDMS, does our department have electrical drafting as well? - HCBBS Forum
100. The outlet pressure of the centrifugal pump has reached the required head, but the current is not 80% of the rated current - HCBBS Forum