English — Forum #723 (Page 579/642)

1. Problems with pipeline supports for centrifugal pumps - HCBBS Forum
2. Analyzing the function of the connection line between the Taraji feed and the deethanized gasoline control valve outlet - HCBBS Forum
3. Has anyone dealt with the treatment of pharmaceutical wastewater? What process is used? - HCBBS Forum
4. Besides being used for acid production and sodium sulfite manufacture, what else can SO2 removed through flue gas purification be used for? - HCBBS Forum
5. Problems with natural gas-based hydrogen production facilities - HCBBS Forum
6. What is a valve oil seal? - HCBBS Forum
7. Calculate the density of the oil based on Enneberg distillation data - HCBBS Forum
8. On stress linearization in Abaqus - HCBBS Forum
9. Which company in China is good for gas chromatography and liquid chromatography? - HCBBS Forum
10. Can non-destructive testing of lined pipes be carried out using radiation? - HCBBS Forum
11. Tips on Questions 29 and 31 on the morning of the first day of the professional exam in 2011 - HCBBS Forum
12. Relationship between cooling rate and grain size - HCBBS Forum
13. Selection of heat exchangers - HCBBS Forum
14. The 300,000-ton high-temperature coal tar hydrogenation project was successfully commissioned - HCBBS Forum
15. What is the purpose of turning a centrifugal pump’s impeller by hand, and how is it done? - HCBBS Forum
16. Suspended solids content in water system - HCBBS Forum
17. Seeking information on the specific working principle of the accident position-locking valve - HCBBS Forum
18. Daily Question 2015.7.23 (EIA Discussion): 3 Wealth points for replies, plus 5 Wealth points for correct answers (single-choice question) - HCBBS Forum
19. What type of pump is suitable for ammonia unloading pumps? - HCBBS Forum
20. How should combustible gases in the ground tank be handled? - HCBBS Forum
21. Axial flow main fan - HCBBS Forum
22. What does “inhibited” mean here? - HCBBS Forum
23. Registered education background and work experience for application - HCBBS Forum
24. Function of the air preheater bypass in the spent acid pyrolysis unit - HCBBS Forum
25. On the methanation reaction in hydrogen production plants - HCBBS Forum
26. Air compressor outlet bellows - HCBBS Forum
27. What considerations are needed when changing from intermittent fixed-bed gas generation to continuous pure oxygen gas generation? - HCBBS Forum
28. It’s been two years since I graduated - HCBBS Forum
29. Corrosion protection for marine platform grating plates - HCBBS Forum
30. 【Daily Question】20150720 Knowledge on Starting and Stopping Feeder Machines (Reply +2 Wealth, Correct Answer +3 Wealth) - HCBBS Forum
31. I’m about to take the exam to become a machine tool fitter technician~~ Those who have already passed the exam, could you give me some advice?~~ - HCBBS Forum
32. Distillation tower: what to do if the packing is clogged? - HCBBS Forum
33. Reasons for turbidity in the atmospheric, vacuum, first-stage vacuum, and second-stage vacuum lines - HCBBS Forum
34. Turbine backpressure steam - HCBBS Forum
35. May I ask what kind of solution is suitable for absorbing fuming sulfuric acid? Can an alkaline solution be used? - HCBBS Forum
36. Material selection for pure titanium heat exchangers - HCBBS Forum
37. One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 264 - HCBBS Forum
38. Procedure for establishing a instrument calibration laboratory - HCBBS Forum
39. How long does it take to steam pork in rice flour? - HCBBS Forum
40. Discussion on coal for Lurgi furnaces - HCBBS Forum
41. Engineering management diagram - HCBBS Forum
42. Are there any friends who are involved in the recycling of used lubricant? - HCBBS Forum
43. For a reactor operating under 0.8 Mpa and with 180° HCl gas, what material is suitable? - HCBBS Forum
44. Daily Question 2015.7.24 (EIA Discussion): 3 Wealth points for replies, plus 5 Wealth points for correct answers (single-choice question) - HCBBS Forum
45. Usage of pipe fittings - HCBBS Forum
46. How does the CO2 stripping urea process reduce gas consumption? - HCBBS Forum
47. Is temperature and pressure compensation applied to the central oxygen? - HCBBS Forum
48. 【Daily Question】Basic knowledge of coking: +6 wealth for correct answers, +2 wealth for participation. Question 4 from 201507 - HCBBS Forum
49. Questions regarding underground corrosion protection - HCBBS Forum
50. For multiple-choice questions in case analysis, is scoring given for selecting fewer options? - HCBBS Forum
51. Some personal views on the new SO2 emission standards - HCBBS Forum
52. During the first temperature increase in the hydrogenation process, the temperature should be below 60°, and the pressure in the upstream system should not exceed 4 MPa - HCBBS Forum
53. Find a specialist to design the expansion joint - HCBBS Forum
54. I have questions regarding the Aspen DSTWU module; please provide an answer - HCBBS Forum
55. How should the auxiliary equipment of a heating furnace be arranged? - HCBBS Forum
56. 【Daily Question】July 26: The main fan of the catalytic cracking unit - HCBBS Forum
57. Why can’t the reminder be removed after the system upgrade? - HCBBS Forum
58. Alignment requirements for flexible coupling flanges of pump machinery - HCBBS Forum
59. How to purify high-temperature gas at 500°C-650°C? - HCBBS Forum
60. The latest standards for PVC resin produced by suspension method - HCBBS Forum
61. What are the differences and advantages/disadvantages between fieldbus control and the installation of conventional field instruments? - HCBBS Forum
62. Discussion on gasification flushing water - HCBBS Forum
63. What should be noted when taking samples with a bladder? - HCBBS Forum
64. Pump head issue - HCBBS Forum
65. Why are the wear-resistant coatings on our factory’s 220T/H and 240T/H units of different heights? Why? - HCBBS Forum
66. Monoblock compressor noise - HCBBS Forum
67. Regarding the control room, the cabinet room is designed to be at positive pressure – how many companies do this? - HCBBS Forum
68. 【Daily Question】7.23 Reply +2； To +3 - HCBBS Forum
69. Regarding the issues encountered in obtaining the registered chemical engineer certificate, urgently needed. Thank you for your reply; I’m waiting anxiously - HCBBS Forum
70. Urgently need ASN (sulfur**) technology - HCBBS Forum
71. Is it true that Emerson’s DELTAV system has a Chinese version of the DCS developed for the Chinese market? - HCBBS Forum
72. Questions from the first pressure vessel design review exam in 2015 (drawing selection and defense) for reference - HCBBS Forum
73. Gas-water separation and expanded gas route - HCBBS Forum
74. One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 261 - HCBBS Forum
75. High temperature – what are the flow measurement instruments? - HCBBS Forum
76. Should a high-temperature hot water pump be set to automatic mode? - HCBBS Forum
77. On hydrogen purification technology - HCBBS Forum
78. The ammonium nitrogen content in cold, high-sulfur wastewater increases - HCBBS Forum
79. Welding - HCBBS Forum
80. Piping and modular design for offshore petrochemical platforms - HCBBS Forum
81. What valve material is used for Freon at -35 degrees Celsius? - HCBBS Forum
82. Analyze shielded pump failures - HCBBS Forum
83. Introduction, features, and applicable media of steel-lined PO pipes - HCBBS Forum
84. 8 Rules for the Workplace to Help You Define Yourself - HCBBS Forum
85. SIS, ESD. DCS redundancy - HCBBS Forum
86. The load current of the centrifugal pump is overloaded - HCBBS Forum
87. Has registration not started yet this year? - HCBBS Forum
88. Are alloy steel pipes good? It’s not much - HCBBS Forum
89. Regarding temperature detection, why are there no transmitters on site? - HCBBS Forum
90. Are there any common property calculation methods available for Aspen Plus? - HCBBS Forum
91. Effect of the annular gap size in the downcomer and upcomer - HCBBS Forum
92. Shandong Yake Environmental Protection Technology Co., Ltd - HCBBS Forum
93. Gasoline: Where have the components at both ends gone? - HCBBS Forum
94. I can’t open the notification about the association’s certification training - HCBBS Forum
95. [Weekly Topic] (37) July 25, 2015: A brief overview of the precautions for using electronic balances. - HCBBS Forum
96. 【Daily Question】20150728 Knowledge on boiler blowdown rate (2 wealth points for a reply + additional 3 wealth points for a correct answer) - HCBBS Forum
97. When using a single-flange transmitter to measure liquid level, what value will the transmitter display if the medium solidifies? - HCBBS Forum
98. Procedures for propane dehydrogenation - HCBBS Forum
99. If a steel-lined equipment is lined with two layers of rubber, what is the material of each layer? The same or different? - HCBBS Forum
100. 【Daily Question】Chemical Engineering Principles 120: Liquid Flooding in Downcomers (July 25) - HCBBS Forum