English — Forum #723 (Page 518/642)

1. 【Daily Question】Chemical Engineering Principles 175: Single-Stage Extraction (September 17) - HCBBS Forum
2. One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 312 - HCBBS Forum
3. Different categories of cranes have varying periodic inspection requirements - HCBBS Forum
4. Which domestic manufacturers produce conductivity meters? The best option is one that offers good quality at a low price. - HCBBS Forum
5. Dangers of excessive internal temperature in cranes and ways to address it - HCBBS Forum
6. What are **chemicals? How many categories are there in total? - HCBBS Forum
7. Which is better, traditional fireproofing layers or modern thin fireproofing layers? - HCBBS Forum
8. What are the basic principles of work safety supervision and management in our country? - HCBBS Forum
9. I’m looking to buy a laptop priced between 2500 and 3500. Could everyone recommend some options? Thanks - HCBBS Forum
10. Thermostatic valve pressure difference - HCBBS Forum
11. Seeking help for online flue gas monitoring - HCBBS Forum
12. Regarding the absorption of BF3 (boric trifluoride) gas - HCBBS Forum
13. Seeking answers regarding the schedule for the bidding process of the power plant project - HCBBS Forum
14. September 18: Boiler Foundation, Question 35 – True/False Questions 7: (A certain score will be given to the top 40) - HCBBS Forum
15. Chlorine removal issue in the bismuth oxide method using zinc sulfate solution - HCBBS Forum
16. Do you know what considerations need to be taken into account when operating an electric single-girder crane? - HCBBS Forum
17. What are the components of a SIS safety instrument system? - HCBBS Forum
18. Regarding corrosion prevention of storage tanks - HCBBS Forum
19. Weld joint between tube sheet and heat exchange tubes - HCBBS Forum
20. Why are the disk and cover of the impeller generally designed to be thin on the outside and thick on the inside? - HCBBS Forum
21. Copper recovery from complexed wastewater in printed circuit board factories - HCBBS Forum
22. Does anyone know about this type of mixing tank and this kind of emulsifier? - HCBBS Forum
23. What is the reason why ecosystems can maintain a dynamic balance? - HCBBS Forum
24. I passed the Certified Safety Engineer exam, but no company wants to hire me; do I have no other choice but to work in secret? - HCBBS Forum
25. September 16: Boiler Foundation, Question 33 – True/False Questions 5: (A certain score will be given to the top 40) - HCBBS Forum
26. The issue of atmospheric heat retention - HCBBS Forum
27. Daily Question: Understanding why there are many views but few replies - HCBBS Forum
28. Seeking help with a calculation problem related to reinforced flat covers - HCBBS Forum
29. Pressure transmitter - HCBBS Forum
30. What are the differences between humid-heat type and high-profile outdoor motors and ordinary motors? - HCBBS Forum
31. Do you still remember that Hai Chuan once had a “popularity score”? - HCBBS Forum
32. Help, properties of perfluorobutadiene - HCBBS Forum
33. In a saline solution, what is the main purpose of measuring the ORP at the outlet of the 3# baffle tank? - HCBBS Forum
34. 【Don’t hit me】How is the decomposition temperature of calcium carbonate determined? - HCBBS Forum
35. Sign-in record post from September 19, 2015 - HCBBS Forum
36. Can nickel-based alloy supports be directly welded inside a nickel-based alloy composite tank? - HCBBS Forum
37. S200 and DCS communication configuration - HCBBS Forum
38. Requirements for the gap between the motor and the base plate - HCBBS Forum
39. In a batch of saline solution, what type of saline solution is returned to the intermediate tank by valves 4 and 6 of the HVM membrane filter? Why is it set up this way? - HCBBS Forum
40. Ten key features of plate heat exchangers - HCBBS Forum
41. I think Josh and Hayes are spies sent by the Rockets to the Clippers! Don’t tell Rivers under any circumstances! - HCBBS Forum
42. How to effectively recycle the wastewater generated again from the secondary brine chelating resin column - HCBBS Forum
43. What is the purpose of controlling the liquid level in the pressurized dissolved air tank in saline water? - HCBBS Forum
44. Insufficient reading permissions - HCBBS Forum
45. Environmental Protection Daily Quiz: Participate on 9/17 for a prize; an additional reward for those who get it right - HCBBS Forum
46. 【Daily Question】True or False: September 18th is regarded by the People’s Republic of China as a National Day of Shame. (Reply +5) - HCBBS Forum
47. Is the stabilization time of the instrument equal to the full stroke time? - HCBBS Forum
48. Equipment maintenance labor cost calculation - HCBBS Forum
49. 【Daily Question】Question from Issue 20150921 - HCBBS Forum
50. How to carry out shutdown and cleaning under the new environmental protection requirements - HCBBS Forum
51. Regarding the replacement version of HGJ209-83 \"Code for Construction and Acceptance of Medium and Low Pressure Chemical Equipment\" - HCBBS Forum
52. Diameter of the drain pipe - HCBBS Forum
53. The distribution issue of turbine radial bearings - HCBBS Forum
54. Wastewater treatment project - HCBBS Forum
55. The certification exam is deceptive; I’m planning to try other exams instead - HCBBS Forum
56. Working principle of the dilution fan - HCBBS Forum
57. Topic on oil content at the compressor outlet (third week of September) - HCBBS Forum
58. Regarding cup-Tower installation - HCBBS Forum
59. Why are nylon pipes rarely chosen for use in the chemical industry? - HCBBS Forum
60. The production process for industrial triethylaluminum? - HCBBS Forum
61. Requirements for the design and detailed design of safety facilities - HCBBS Forum
62. The inlet water of the SBR is black, and the outlet water is also black - HCBBS Forum
63. Difference between minimum design metal temperature and design temperature - HCBBS Forum
64. Service life of pearlescent sand - HCBBS Forum
65. What are the processing methods for centrifuge impellers? - HCBBS Forum
66. Talk about Dongfang Xi Al’s polysilicon project in Wucaiwan, Changji - HCBBS Forum
67. September 12: Boiler Basics Question 29 – True/False Questions 1: (A certain score will be given to the top 40 participants) - HCBBS Forum
68. A newly registered number. Please take good care of each other - HCBBS Forum
69. Daily Question, 2015.9.17 (EIA Discussion): 3 Wealth points as a reward for replying, plus 5 Wealth points for the correct answer (single-choice question) - HCBBS Forum
70. What are the ways to classify sensors? - HCBBS Forum
71. I have a question regarding the pressure equalization holes in the return tank - HCBBS Forum
72. Want to learn *how to read DCS logic diagrams - HCBBS Forum
73. Problems with heat exchangers and reboilers in delayed coking units - HCBBS Forum
74. Customized management of fire extinguishers - HCBBS Forum
75. Let’s talk about technical immigration - HCBBS Forum
76. Methods to prevent indirect contact electric shock? - HCBBS Forum
77. Does liquid sulfur trioxide dissolve in concentrated sulfuric acid? - HCBBS Forum
78. Technical discussion: Can bolt holes be drilled in a concrete foundation that has already been poured? - HCBBS Forum
79. Incident Handling 45: How should a circulating fluidized bed boiler be handled when it shuts down? - HCBBS Forum
80. When using the direct comparison method to calibrate instruments, how should a standard gauge be selected? - HCBBS Forum
81. One Question per Day, September 15, 2015 - HCBBS Forum
82. “Heat exchange optimization for “narrow points” - HCBBS Forum
83. 【Daily Question】Chemical Engineering Principles 172: Gas Film Control (September 14) - HCBBS Forum
84. Methanol reaction and hydrogenation processes - HCBBS Forum
85. What are electromagnetic compatibility standards? - HCBBS Forum
86. There is a square shield below the ABB positioner, with a hole inside it – what is it for? - HCBBS Forum
87. Is there a theoretical calculation model for noise reduction? - HCBBS Forum
88. Let’s brainstorm about what causes coal tar to coking during the heat exchange and heating process. - HCBBS Forum
89. If the composition of an azeotropic system is higher than its equilibrium composition, does that mean the originally light component becomes the heavy component? - HCBBS Forum
90. Communication issues between the controller and the operation station? - HCBBS Forum
91. One question per day to learn about occupational health - HCBBS Forum
92. A case study on the troubleshooting of faulty control valves in technical upgrades - HCBBS Forum
93. Considerations for selecting pressure transmitters - HCBBS Forum
94. Are there retention valves available in a 1/2 size? - HCBBS Forum
95. Question: How should such incidents be handled? - HCBBS Forum
96. The difference between monoethanolamine and ethanolamine - HCBBS Forum
97. How to contact BASF China? - HCBBS Forum
98. Part-time job for CAD mechanical drawing - HCBBS Forum
99. Installation of the water seal tank - HCBBS Forum
100. What to do if the liquid level controller of the geothermal deaerator is always broken? - HCBBS Forum