English — Forum #723 (Page 527/642)

1. What are the respective advantages of plate evaporators and shell-and-tube evaporators, and what are the differences between them? - HCBBS Forum
2. What is the purpose of controlling the flow rate at the inlet of the pretreater in saline water? - HCBBS Forum
3. Catalyst inhibitor for naphtha hydrogenation - HCBBS Forum
4. Design of multi-story chemical plant buildings of Class A - HCBBS Forum
5. What is the maximum temperature that Dongsheng’s V-type seal rings can withstand? - HCBBS Forum
6. Post-weld heat treatment equipment: what to do if the pre-welded parts fall? - HCBBS Forum
7. Why does the alkali in the LPG C4 alkaline washing tank crystallize? - HCBBS Forum
8. Can nickel-based alloy 600 replace CR20Ni32 for use in the thermocouple sleeves of hydrogen production furnace tubes? - HCBBS Forum
9. 【Daily Question】Question from Issue 20150918 - HCBBS Forum
10. Could everyone clarify whether the trough is equipped with flushing water? - HCBBS Forum
11. Sign-in record post from September 20, 2015 - HCBBS Forum
12. Comparison of SMC’s pneumatic directional control valves and STNC Sonotek’s options? - HCBBS Forum
13. Effect of the preheating line in the catalytic nozzle - HCBBS Forum
14. Local replacement of desulfurization drill pipes in delayed coking - HCBBS Forum
15. The positive terminal has a voltage of 24V with respect to ground, while the negative terminal has a voltage of 0V with respect to ground. Why are the voltages at both the positive and negative terminals measured as 0V? What’s going on? - HCBBS Forum
16. 【Daily Question】Issue 20150922 Test - HCBBS Forum
17. MTP, MTO catalysts - HCBBS Forum
18. Solving distillation column problems~~~ - HCBBS Forum
19. 【Daily Question】Question from Issue 20150918 - HCBBS Forum
20. Dear experts, I’m looking for a low-cost formula for bulk dishwashing detergent using a sulfonic acid + caustic soda + AES system - HCBBS Forum
21. How to back up the database of the Deltav system? - HCBBS Forum
22. What is the maximum nominal diameter for which elliptical end caps can be formed in one piece at manufacturing plants these days? - HCBBS Forum
23. What are the methods for escaping from a fire? - HCBBS Forum
24. Urgently seeking a equipment engineer - HCBBS Forum
25. Regarding expansion refrigeration - HCBBS Forum
26. Carbon source feeding device and selection - HCBBS Forum
27. 【Daily Question】9.22 Reply +2； To +3 - HCBBS Forum
28. 【Seeking Talents】Guangdong Dewei High-Tech Energy Co., Ltd - HCBBS Forum
29. 【Daily Question】9.23 Reply +2； To +3 - HCBBS Forum
30. Residue ash content - HCBBS Forum
31. Product: ammonium sulfate, Jiaxing, manufacturers for recovery or treatment - HCBBS Forum
32. 【Daily Question】September 22: What is the correct procedure for injecting fuel into the riser when starting up a catalytic cracking unit? - HCBBS Forum
33. Are American media really saying that the Rockets will win the Western Conference title? Did they receive red envelopes from the Rockets? - HCBBS Forum
34. May I ask, at what concentration of salt acid is there no significant acid mist? - HCBBS Forum
35. Some tips for learning English* – recommendations and sharing - HCBBS Forum
36. Calculation of the addition concentration of flocculants and dispersants - HCBBS Forum
37. The super bounty feature has been improved. Post more to solve problems and gain wealth. Celebrating the establishment of the Operations Team: 23 Wealth per person, available twice! - HCBBS Forum
38. 【Daily Question】9.20 Reply +2； To +3 - HCBBS Forum
39. Summary of Freelance Task Bidding Posts - HCBBS Forum
40. Reasons for the decrease in compressor temperature - HCBBS Forum
41. What are the design features of a water scrubber tower? - HCBBS Forum
42. Discussion on the Zhongtian Hechuang project - HCBBS Forum
43. Exhaust treatment - HCBBS Forum
44. Is it necessary to purge with nitrogen when shutting down a chemical liquid processing line? - HCBBS Forum
45. What is the configuration of the four models of gaskets ABCD, with inner and outer rings? - HCBBS Forum
46. Heating furnace burner - HCBBS Forum
47. I’m new to process piping; please help me out with this issue. Thank you - HCBBS Forum
48. A brief discussion on some peculiar cases encountered in the operation of pressure vessels - HCBBS Forum
49. Page 39 of the 2013 version of SH 3010, and page 65 of the 2000 version – why was so much content removed? . - HCBBS Forum
50. DPT100 Instructions - HCBBS Forum
51. Body language in communication skills - HCBBS Forum
52. 【Weekly Topic】- What are the fillers used in contact oxidation? - HCBBS Forum
53. Which is better, four shifts with three rotations or four shifts with two rotations? - HCBBS Forum
54. Selection of wastewater treatment equipment - HCBBS Forum
55. 【Daily Question】0916 Surface finishing of tower foundations (+2 wealth for participation, +3~8 wealth for correct answer) - HCBBS Forum
56. Should a two-piece fitting be installed in front of the pressure vessel? - HCBBS Forum
57. Seeking a complete set of analytical instruments for chlor-alkali plants (heavy reward offered) - HCBBS Forum
58. Stress calculation for pipes under negative pressure - HCBBS Forum
59. How to prevent the equipment from being eroded by the material flowing in the pipes - HCBBS Forum
60. Sliding carbon phenomenon occurs in the Ende furnace - HCBBS Forum
61. What are the main types of circulating water cooling? - HCBBS Forum
62. Issue with the NaCl concentration in brine - HCBBS Forum
63. One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 308 - HCBBS Forum
64. Discussion on filtration issues in butyllithium production - HCBBS Forum
65. Adjustment of oil viscosity - HCBBS Forum
66. Has anyone used Hefei Smith flow meters? How is the product? - HCBBS Forum
67. Please ask an expert to let me know - HCBBS Forum
68. Catalytic cracking catalyst poisoning - HCBBS Forum
69. Magnetic seal for kettles - HCBBS Forum
70. Oil slurry furfural extraction unit - HCBBS Forum
71. Buried pipe issue - HCBBS Forum
72. Questions regarding canned motor pumps and magnetic drive pumps…… - HCBBS Forum
73. Downstream products of mirabilite - HCBBS Forum
74. Job hunting for procurement - HCBBS Forum
75. For foreign-funded companies, the monthly salary of an M.E. Manager is around 25K - HCBBS Forum
76. Speculations on how long changes in feed composition affect subsequent units - HCBBS Forum
77. For pipelines carrying flammable and explosive media, is it acceptable to use magnetic particle testing for the welds? - HCBBS Forum
78. What is the meaning of INDUCTION PERIOD? - HCBBS Forum
79. 【Daily Question】Chemical Engineering Principles 174: Driers (September 16) - HCBBS Forum
80. 【Daily Question】Issue 20150917 Test - HCBBS Forum
81. Double overflow tray and single overflow tray - HCBBS Forum
82. What is the pressure resistance of 140*8 seamless steel pipes? - HCBBS Forum
83. Where is the future development? - HCBBS Forum
84. How should 8 filters be combined and controlled in a reasonable way? Urgent! Urgent! Urgent! ! ! - HCBBS Forum
85. 【Daily Question No. 19】September 21, 2015: +2 wealth for participation, +3 wealth for a correct answer - HCBBS Forum
86. Questions on PDS desulfurization technology knowledge - HCBBS Forum
87. The circulating water in mechanical pumps often gets scaled and clogged - HCBBS Forum
88. Differences and application ranges of R307 and R307C electrodes - HCBBS Forum
89. Regarding the issue of chloride content - HCBBS Forum
90. Is it still necessary to conduct a strength test on the newly purchased valves before installing them on site? - HCBBS Forum
91. c2 - HCBBS Forum
92. What causes the hydrogen sulfide and carbon dioxide levels in the sulfur recovery lean solution to be above the specified limits? - HCBBS Forum
93. Can methyl formate be stored in a dome tank? - HCBBS Forum
94. What are the countermeasures for cable fires? - HCBBS Forum
95. High liquid level in the catalytic converter pre-vulcanization tank - HCBBS Forum
96. Device for detecting whether the cooling water of pumps is flowing - HCBBS Forum
97. What parameters are represented by the expansion joint model? - HCBBS Forum
98. **Are there any differences between summer and winter regarding the filling capacity of liquid chlorine cylinders? - HCBBS Forum
99. The sludge from hydrolytic acidification has a different appearance compared to that from other water treatment processes - HCBBS Forum
100. What is the effect of crushing industrial catalysts on their performance? - HCBBS Forum