English — Forum #723 (Page 483/642)

1. Mechanical seal start-up exhaust? - HCBBS Forum
2. The split-type LVDT outputs 4~20mA – is a load resistor required? - HCBBS Forum
3. Which pump should be chosen in this situation - HCBBS Forum
4. Question 70 on boiler foundations on October 23: (A certain score will be given to the top 40) - HCBBS Forum
5. Recommended heat transfer oil - HCBBS Forum
6. Afternoon Summary of Alkylation Oil (20151026) - HCBBS Forum
7. Issues with the output of PT100 temperature transmitters - HCBBS Forum
8. Issues regarding the treatment of used lubricating oil in centrifugal compressors - HCBBS Forum
9. 【Daily Question】10.26 True or False: Water content in crude oil can cause tower flooding (Reply with +2 for rewards) - HCBBS Forum
10. Request for chimney draft calculation - HCBBS Forum
11. 【Cracking Question Bank】What is the purpose of the waste heat boiler in a cracking furnace? - HCBBS Forum
12. Guidelines for the Standardized Management of Industrial Hazardous Waste Generating Units--12 - HCBBS Forum
13. Daily Report on Alkylated Oils: 20151019 - HCBBS Forum
14. Let’s work on questions 23-24, the multiple-choice questions on \"Engineering Economics\" from the 2015 First-Class Constructor Examination, question 26 part 2 - HCBBS Forum
15. Are there any seniors working on EVA emulsions? What’s the situation of the domestic EVA emulsion market? - HCBBS Forum
16. I would like to ask those who have obtained the certificate: when getting it, do the staff at the counter check the social security statement? - HCBBS Forum
17. Key points of installation technology for metal ring gaskets used on the RJ sealing surface of pipe flanges - HCBBS Forum
18. Diameter of the flow-limiting orifice plate on the pressure tapping pipe of the gasifier - HCBBS Forum
19. What are the general categories of environmental impact assessment? - HCBBS Forum
20. A problem was detected with the bottom reboiler during normal production - HCBBS Forum
21. 【Ethylene Question Bank】The purpose of pressurizing first and then introducing liquid when starting an ethylene refrigeration compressor is - HCBBS Forum
22. Drying tower to remove moisture - HCBBS Forum
23. What is the function of the chlorine seal groove near the chlorine main pipe? - HCBBS Forum
24. Issues related to Sinopec’s Hebi coal-to-olefins project - HCBBS Forum
25. What are the main factors affecting the PSA process? - HCBBS Forum
26. Everyone who is the class leader, come in please - HCBBS Forum
27. Please provide the calculation process - HCBBS Forum
28. Regarding hydrogen sulfide in recycled hydrogen. - HCBBS Forum
29. 【Daily Question】Wastewater Knowledge - 10-21 (Answer +3, Correct Answer +5) - HCBBS Forum
30. How to calculate chimney emissions】 - HCBBS Forum
31. The feed rate and sulfur content are known; now the sulfur content needs to be changed. What is the calculation process? - HCBBS Forum
32. Special Topic 2 of the Registered Chemical Engineer Professional Examination: Separation of Heterogeneous Systems, Solid Fluidization - HCBBS Forum
33. Regarding the differences in flue gas composition, how is the heat content of the flue gas calculated? - HCBBS Forum
34. Selection of coal mill size - HCBBS Forum
35. Request interlock settings for liquid oxygen pump redundancy - HCBBS Forum
36. Seeking guidelines for setting up electronic fences at sewage treatment plants - HCBBS Forum
37. Aspen Dynamics simulation - HCBBS Forum
38. Seeking advice on entering flange data for sw6-2011 software calculation - HCBBS Forum
39. 10° elbow - HCBBS Forum
40. 【Petrochemical Edition】Vote to claim rewards in the October Best Administrator selection contest - HCBBS Forum
41. How come the wealth exchange for luck points is gone? - HCBBS Forum
42. The oil discharge pressure in the cylinder of the diaphragm compressor is too high – what could be the cause? - HCBBS Forum
43. Connection type between the tubes and the tube sheet of a falling film evaporator - HCBBS Forum
44. One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 338 - HCBBS Forum
45. What are the main sources of chemical pollution? - HCBBS Forum
46. How to prove that PVC powder meets the requirements for medical products? - HCBBS Forum
47. 【Daily Question】Chemical Engineering Principles 212: Multi-layer Plane Walls (October 24) - HCBBS Forum
48. [Cracking Question Bank] What are the ways to represent cracking depth? - HCBBS Forum
49. 【Ethylene Question Bank】What are the key factors affecting the ethylene yield in the demethanization tower? (5 points) - HCBBS Forum
50. 【Daily Question】Wastewater Knowledge - 10-23 (Answer +3, Correct Answer +5) - HCBBS Forum
51. Registration of Class B boilers - HCBBS Forum
52. Principle of calcium chloride dehydrator and principle of freeze dehydration - HCBBS Forum
53. Toxic gas detector - HCBBS Forum
54. Exchange capacity of MTBE resin catalysts - HCBBS Forum
55. Differences in the ethylene glycol process - HCBBS Forum
56. Differences in residue oil - HCBBS Forum
57. What is the difference between the actual density of a liquid and its standard density, and which density should be used as a reference for pump selection? - HCBBS Forum
58. I would like to ask which domestic companies are planning to launch polysilicon projects. - HCBBS Forum
59. Chemical process construction drawing design, drafting, design, verification, review, approval, authorization - HCBBS Forum
60. “Why do the \"miraculous\" phoenix trees bloom in late autumn? - HCBBS Forum
61. What is the effect of air velocity on methanol synthesis? - HCBBS Forum
62. Please provide the latest versions of the two standards - HCBBS Forum
63. What are people’s thoughts on the current MTO and MTP? - HCBBS Forum
64. Heat exchanger design for liquefied ethylene cooling recovery - HCBBS Forum
65. Reasons for the high COS content in exhaust gases - HCBBS Forum
66. 0.05% salt, acid at 85°C – which stainless steel grades 2205, 2507, 904L can be used? - HCBBS Forum
67. Learn to stay calm - HCBBS Forum
68. Selection and application techniques of desiccants in vacuum environments - HCBBS Forum
69. Turbine make-up steam quick-shut valve - HCBBS Forum
70. Relationship between heating furnace dampers and negative pressure - HCBBS Forum
71. What is the significance of safety analysis work? - HCBBS Forum
72. Fluctuations in diesel upgrading distillation column - HCBBS Forum
73. The market is recovering - HCBBS Forum
74. Has anyone heard of the manufacturer LAT? Working on expanders~~ - HCBBS Forum
75. May I ask whether the fittings in plastic-lined (PP, PE, PVC) steel pipes and fittings specified in HG20538-1992 can be connected to flanges specified in HG20592? - HCBBS Forum
76. Can a screw pump have its inlet closed to reduce flow rate and thereby lower outlet pressure? - HCBBS Forum
77. What should be noted when replacing a liquid chlorine cylinder? - HCBBS Forum
78. The series on the ingredients in the \"Who Am I?\" section of the Food category at the convenience store of HaiChuan Irrigation Co., Ltd. now has over 250 entries； - HCBBS Forum
79. Construction site management for small and medium-sized projects - HCBBS Forum
80. Statistics on sulfur content indicators in urea carbon dioxide gas - HCBBS Forum
81. 【Daily Question】Question from Issue 20151021 - HCBBS Forum
82. Which factories, and which aspects of those factories are prone to fires caused by static electricity? - HCBBS Forum
83. Interest from the community points bank - HCBBS Forum
84. 【Weekly Question】+9 for correct answers, +2 for participation； Close this post on Sunday - HCBBS Forum
85. Problems encountered during the on-site production of the evaporator - HCBBS Forum
86. 【Daily Question】Question from Issue 20151020 - HCBBS Forum
87. 【Daily Question】Question from the 20151021 issue - HCBBS Forum
88. Let’s work on question 16-20 from the 2015 First-Class Constructor Examination, related to \"Engineering Economics\": multiple-choice questions 03-04 - HCBBS Forum
89. What to do if you’re on the wrong side or with the wrong person? - HCBBS Forum
90. Selection of level gauges for formaldehyde storage tanks - HCBBS Forum
91. Dimethyl ether: Challenges and opportunities alike - HCBBS Forum
92. What filter media is used in the side filter tank? - HCBBS Forum
93. What are the requirements for sulfuric acid in Mannheim process potassium sulfate? - HCBBS Forum
94. 【Ethylene Question Bank】Why should the bed temperature in a methanation reactor not be controlled too low? (Question bank: 5 points) - HCBBS Forum
95. Be like water in life, and like a mountain in action - HCBBS Forum
96. How to manage the risks of decisions? - HCBBS Forum
97. What happens when vacuum residue comes into contact with superheated steam? - HCBBS Forum
98. Measurement issues of elbow flowmeters - HCBBS Forum
99. Environmental Protection Daily Quiz: October 24 – Participate for prizes; 3 correct answers earn an additional prize - HCBBS Forum
100. Issues with electronic versions - HCBBS Forum