English — Forum #723 (Page 473/642)

1. Joint Learning*1030: +2 wealth for participation, +9 wealth for correct answers - HCBBS Forum
2. I earnestly ask: why does the activity of platinum carbon drop significantly after being soaked in methanol for half an hour? - HCBBS Forum
3. Does the water flow rate in the spiral plate type 1 heat exchanger change depending on the diameter of the inlet pipe? - HCBBS Forum
4. What is a check valve with a partition? - HCBBS Forum
5. What welding electrode should be used for surfacing NO8825 on the tube sheet S30408? - HCBBS Forum
6. 【Daily Question】10.29 Multiple-choice question: After the oil in the container is completely drained during shutdown, it should be purged with steam for ( ) hours - HCBBS Forum
7. 【Daily Question】11.5 Multiple-choice question: Even when anti-hydrogen steel is used, during the shutdown process - HCBBS Forum
8. Coke oven shutdown for maintenance - HCBBS Forum
9. Joint Study*1104: +2 wealth for participation, +9 wealth for correct answers - HCBBS Forum
10. How to analyze equipment frost cracking? - HCBBS Forum
11. Regarding the boiler boiling issue - HCBBS Forum
12. Retrieve items you deleted and emptied from the recycle bin - HCBBS Forum
13. What are the methods for detecting vortex frequency? - HCBBS Forum
14. With whom is the Siemens CP communication module mainly used for communication? Is it necessary? - HCBBS Forum
15. Four rates of instruments - HCBBS Forum
16. Seeking advice on denitrification and phosphorus removal processes - HCBBS Forum
17. For containers such as spherical tanks, should the manhole at the top be opened first or the one at the bottom when opening the tank? - HCBBS Forum
18. What effects can inadequate water and steam quality have on the components of a circulating fluidized bed boiler? - HCBBS Forum
19. PID control - HCBBS Forum
20. Joint Learning*1103: +2 wealth for participation, +9 wealth for correct answers - HCBBS Forum
21. Hydrogen peroxide and sodium hydroxide - HCBBS Forum
22. The function of the manifold in the heating plant - HCBBS Forum
23. 【Daily Question】Question from Issue 20151030 - HCBBS Forum
24. Issues regarding polluted acid and waste acid treatment - HCBBS Forum
25. How can I use CAD to fill the gap between two circles? Thank you! - HCBBS Forum
26. There are cable trays for analog cables/power cables/temperature and digital signals cables; in which tray is it most suitable to place fiber optic cables? - HCBBS Forum
27. Color coding specifications for grounding flat bars - HCBBS Forum
28. Heat exchanger - HCBBS Forum
29. Is a manual valve usually installed in front of the solenoid valve? - HCBBS Forum
30. Calculation issues for fixed tube sheets in SW6 - HCBBS Forum
31. Regarding the setup of loading for ANSYS nonlinear calculations - HCBBS Forum
32. Questions about a claim regarding denitrification - HCBBS Forum
33. What precautions should be taken when operating a flush level gauge? - HCBBS Forum
34. Principles and requirements for operating a heating furnace - HCBBS Forum
35. Using hot-rolling and cold-rolling is suitable for making containers - HCBBS Forum
36. What is the difference between gate valves Z26R-N114 and Z26R-J101? - HCBBS Forum
37. As long as one has a clear conscience, that’s enough - HCBBS Forum
38. 【Daily Question】2015.10.29 Tube blockage in heat exchangers (First 80 participants + 2 rewards) - HCBBS Forum
39. Temperature of catalytic feedstock tank - HCBBS Forum
40. How can heat transfer oil leaks be prevented? - HCBBS Forum
41. 9.8MPA, 315 degrees, 30 T/H backpressure turbine, with a backpressure of 4.5 barg. Is there? - HCBBS Forum
42. How to determine the proportion of on-site random inspections for valves - HCBBS Forum
43. Everyone, let’s work on question 38-2: multiple-choice questions 56-57 from the 2015 First-Class Constructor Examination in Engineering Economics; there will be a reward for correct answers - HCBBS Forum
44. Questions about consulting firms preparing feasibility studies and project proposals? - HCBBS Forum
45. How should the position, specifications, and quantity of the saddles for horizontal storage tanks be specified? - HCBBS Forum
46. Welding procedure card, welding procedure specification, welding procedure qualification report - HCBBS Forum
47. PDS Seeking Help Season 2 - HCBBS Forum
48. All fates are predestined! - HCBBS Forum
49. Internal quality control standards - HCBBS Forum
50. Motor vibration problems - HCBBS Forum
51. 【Daily Question No. 19】November 5, 2015: +2 wealth for participation, +3 additional wealth for correct answers - HCBBS Forum
52. For multi-stage absorption towers, how should the concentration of the absorbent solution be determined? - HCBBS Forum
53. Water ring vacuum pumps have a high rotation speed, can be driven directly by a motor, and require no lubrication inside, right? - HCBBS Forum
54. Safe release of new equipment - HCBBS Forum
55. Selection of hydrogen flow meter - HCBBS Forum
56. Looking for waste alkali solution from refineries; preferably within Jiangsu Province. Contact Mr. Chen at 15061655132 - HCBBS Forum
57. Just a quick question: do the parameters need to be changed after moving an electromagnetic flowmeter? - HCBBS Forum
58. Ammonium molybdate/molybdenic acid - HCBBS Forum
59. Factors affecting the outlet flow rate of centrifugal pumps - HCBBS Forum
60. Topic on maintenance staff training (first week of November) - HCBBS Forum
61. Types of dry adsorption desulfurization agents for SO2 removal - HCBBS Forum
62. 【Daily Question】10.27 True or False: When drying a hydrogenation catalyst, the higher the system pressure, the greater the compressor displacement, and thus the drying... - HCBBS Forum
63. Acid leakage from the flange of the purification acid pipe - HCBBS Forum
64. How to increase wealth points? - HCBBS Forum
65. Everyone, let’s work on question 36-2: multiple-choice questions 53-54 from the 2015 First-Class Constructor Examination in Engineering Economics; there will be a reward for those who answer correctly - HCBBS Forum
66. What is the normal initial boiling point of deasphalted oil? - HCBBS Forum
67. Find the characteristic parameters of helium at different temperatures, that is, its density, specific heat, thermal conductivity, motion, etc., at various temperatures... - HCBBS Forum
68. Issues regarding the retesting of materials entering the site for installation projects - HCBBS Forum
69. Are there any books on hydrogen production management? Thank you - HCBBS Forum
70. Standards for piling and foundations - HCBBS Forum
71. What aspects need to be considered in a comprehensive analysis of the energy consumption for hydrogen production? - HCBBS Forum
72. How to deal with organic impurities in 2-inch natural gas pipelines - HCBBS Forum
73. Design pressure of vacuum pipeline - HCBBS Forum
74. The issue with the interlock valve tag number - HCBBS Forum
75. What standards should be followed for the factory acceptance of centrifugal pumps? - HCBBS Forum
76. Weekly topic: 5 Wealth points for those who answer correctly, 2 Wealth points for participation； Question 205 - HCBBS Forum
77. 【Daily Question】Question from Issue 20151029 - HCBBS Forum
78. 【Daily Question】Wastewater Knowledge - 10.30 (2 points for answering, 5 points for a correct answer) - HCBBS Forum
79. Which design institute is good at treating wastewater from the refining industry? Looking for recommendations - HCBBS Forum
80. [Daily Question] Sewage Knowledge - 10-28 (Answer +2 +Correct Answer +5) - HCBBS Forum
81. 【Daily Question】Chemical Engineering Principles 221: Convection Heat Transfer (November 2) - HCBBS Forum
82. How to determine the type of pressure transmitter based on the Rosemount 3051 series model? - HCBBS Forum
83. 【Daily Question】Wastewater Knowledge - 10.28 (2 points for answering, 5 points for a correct answer) - HCBBS Forum
84. Describe the development of catalysts for methanol synthesis? - HCBBS Forum
85. How to handle a circulating fluidized bed boiler after it shuts down? - HCBBS Forum
86. Daily Question 2015.10.28 (EIA Discussion): 3 Wealth points for replies, plus 5 Wealth points for correct answers (multiple-choice question) - HCBBS Forum
87. 【Daily Question No. 17】November 3, 2015: +2 wealth for participation, +3 wealth for a correct answer - HCBBS Forum
88. \"Coal Chemical Industry Zone\" – Wage Payments, October 2015 - HCBBS Forum
89. Workplace Debate Episode 69: Spend more or save more in your youth? - HCBBS Forum
90. Seeking help with chemical engineering design — Ammonia-nitrogen wastewater treatment project with a daily processing capacity of 300 m3 - HCBBS Forum
91. What correct attitude should we have toward the environment? - HCBBS Forum
92. How to handle the excess sludge from paper mill wastewater treatment - HCBBS Forum
93. What does the insulation layer in the catalyst basket refer to? - HCBBS Forum
94. Top-cutting oil - HCBBS Forum
95. How is the excess air coefficient of a circulating fluidized bed boiler determined? - HCBBS Forum
96. How to write a job application resume? - HCBBS Forum
97. Why does the luck score in November still carry over the cumulative value from October? - HCBBS Forum
98. Discussion on boiler issues - HCBBS Forum
99. With profit at the core, the gas deep-processing industry chain continues to expand - HCBBS Forum
100. Issues related to the annual monitoring of radiation sources - HCBBS Forum