English — Forum #723 (Page 484/642)

1. 【Daily Question】Chemical Engineering Principles 206: Heat Transfer Rate (October 18) - HCBBS Forum
2. How do you determine the gas flow rate for nitrogen purging in centrifuges? - HCBBS Forum
3. Difference between IEC 60331/60332 fire protection standards and flame retardancy standards - HCBBS Forum
4. Help - HCBBS Forum
5. I would like some advice on the installation of pumps, pipes, and valves - HCBBS Forum
6. Principle of stress-relief heat treatment - HCBBS Forum
7. How to handle liquid ammonia? - HCBBS Forum
8. Looking for a cracked patch for PDMS12.0SP6.0 - HCBBS Forum
9. Questions regarding the post-heat treatment of low-alloy steel - HCBBS Forum
10. Who has a template for a technical patent application? Thank you for your help - HCBBS Forum
11. Let’s work on questions 21-20 from the 2015 First-Class Constructor Examination, related to \"Engineering Economics\": multiple-choice questions 13-14 - HCBBS Forum
12. 【Daily Question】Question from Issue 20151023 - HCBBS Forum
13. Request the process medium code from Tianchen Design Institute - HCBBS Forum
14. Calculation of the material balance regarding the normal hydrogen production volume of the device - HCBBS Forum
15. Anti-freezing measures for sewage areas - HCBBS Forum
16. Break-even point for coal-to-oil production - HCBBS Forum
17. PDMS11.6 software application - HCBBS Forum
18. What does the concentration unit ppm mean? - HCBBS Forum
19. Surprise! Instructions for using “This Month’s Luck” allocated by the system - HCBBS Forum
20. Pressure vessel issues - HCBBS Forum
21. Aquatech’s zero-liquid-discharge technology will be applied to Shenhua Group’s coal-to-oil project - HCBBS Forum
22. Seeking help with Gibbs reactor - HCBBS Forum
23. Let’s work on question 24, part 2015, from the First-Class Constructor Examination – Multiple Choice Questions 19-20 in Engineering Economics - HCBBS Forum
24. What is the most serious lubrication accident you have seen? - HCBBS Forum
25. Weekly topics: reach 200 to claim a variety of rewarding prizes； Question 200 - HCBBS Forum
26. What’s the use of evacuating a steam turbine? - HCBBS Forum
27. Seeking advice on the selection of steam control valves for alkylation units - HCBBS Forum
28. What is the safety investment ratio for production costs? - HCBBS Forum
29. Determine whether this filter is a pressure vessel? - HCBBS Forum
30. Issues regarding the supervision engineer qualification certificate - HCBBS Forum
31. Corrosion of copper pipes by boiler steam cooling water - HCBBS Forum
32. I’m curious to know how many people use SolidWorks Routing for 3D piping modeling - HCBBS Forum
33. Who is Mei Changsu? - HCBBS Forum
34. Liquefied petroleum gas, gasoline alkaline desulfurization - HCBBS Forum
35. Online analytical instruments - HCBBS Forum
36. May a steel structure canopy be installed on top of Class A tank areas? - HCBBS Forum
37. Congratulations, my store has reached two hearts! - HCBBS Forum
38. Request for the 15-year Chlor-Alkali Association directory - HCBBS Forum
39. Regarding the settings for “new member posts” - HCBBS Forum
40. What is the economic evaluation of safety technologies? - HCBBS Forum
41. Daily Question 2015.10.20 (EIA Discussion): 3 Wealth points for replies, plus 5 Wealth points for correct answers (multiple-choice question) - HCBBS Forum
42. Unit conversion table - HCBBS Forum
43. Is the flow rate stable for a metering pump that uses frequency conversion control? Has the head changed? - HCBBS Forum
44. Let’s work on questions 21-22 from Set 25 of the 2015 First-Class Constructor Examination in Engineering Economics – multiple-choice questions - HCBBS Forum
45. Help translate - HCBBS Forum
46. I want to open a small noodle shop; please help me come up with a name - HCBBS Forum
47. Acceptance at pipeline installation site - HCBBS Forum
48. 【October 26 – November: One question per Monday】Multiple-choice questions - HCBBS Forum
49. The cam design method developed by the Japanese - HCBBS Forum
50. What is the phenomenon of vapor-liquid azeotropy in the drum, its causes, and treatment methods? - HCBBS Forum
51. In negative pressure distillation, how is the flow rate of the forced circulation pump in the reboiler at the bottom of the tower determined? - HCBBS Forum
52. Hiring a production supervisor - HCBBS Forum
53. The issue of keeping the device over winter - HCBBS Forum
54. Biomass fuel will replace coal-fired boilers - HCBBS Forum
55. What is the purpose of installing insulation rings on thermal insulation equipment? - HCBBS Forum
56. Calculation of filter element quantity - HCBBS Forum
57. What do noise measurement metrics mean? - HCBBS Forum
58. [Cracking Question Bank] The factors that affect the radiation in cracking furnaces include - HCBBS Forum
59. What inspections should be carried out on the auxiliary equipment before starting a circulating fluidized bed boiler? - HCBBS Forum
60. 【Daily Question】Question from the 20151021 issue - HCBBS Forum
61. When the heat pipe’s evaporation section is filled with flue gas, what is the typical value for the mass flow rate facing it? - HCBBS Forum
62. Drying tower - HCBBS Forum
63. Question 65 on the foundation of Furnace 10/18: (A certain score is given to the top 40) - HCBBS Forum
64. Liquid degassing technology - HCBBS Forum
65. Examples of energy savings from double-effect distillation - HCBBS Forum
66. What are the common types of steel used for various components of boilers? - HCBBS Forum
67. What is the effect of using an MBR membrane in combination with biological contact oxidation? - HCBBS Forum
68. 【Hydrogen Section】Vote for the Best Member of October to win cash prizes - HCBBS Forum
69. What are the consequences of connecting an explosion-proof instrument to a safety barrier? - HCBBS Forum
70. Coking stilling furnace - HCBBS Forum
71. Is there a standard definition for HT/G 20580-20585 steel chemical containers (commonly known as the six-in-one type)? - HCBBS Forum
72. Is the air volume the same for the forward-curved and backward-curved blades of a centrifugal fan? - HCBBS Forum
73. Xinhuang Sanxin Barium Industry Co., Ltd - HCBBS Forum
74. Global crude oil demand is expected to decline by 33% in 2016 - HCBBS Forum
75. Understanding Modern Corporate Management from the ~~Resignation Letter from a Former Vice President at Huawei to Ren Zhengfei~~ - HCBBS Forum
76. Who is familiar with furfural equipment? - HCBBS Forum
77. gaodi913 appointed as the head of the mechanical equipment region, super moderator - HCBBS Forum
78. Raw material gas filter before the converter - HCBBS Forum
79. Recently, the company plans to purchase a batch of portable alarms. I’m not sure which manufacturer’s products are the best; I would appreciate some advice from those who know more about this. Thank you! - HCBBS Forum
80. Urgently need the contact information of the patent holder for the four-nozzle water-coal slurry gasification process! ! - HCBBS Forum
81. Solution for three-valve block model - HCBBS Forum
82. Start-up of the atmospheric and vacuum distillation tower - HCBBS Forum
83. How to adjust the liquid level in the cold water tank? - HCBBS Forum
84. What type of level gauge is used to measure the level of concentrated sulfuric acid? - HCBBS Forum
85. Can flat-weld flanges be used for gas pipelines? - HCBBS Forum
86. Issues regarding the cooling water hose for the Texaco gasifier burner - HCBBS Forum
87. Why are discharge flow meters generally not installed for low-temperature materials? - HCBBS Forum
88. Changes in the pH of the black water from the gasification grate after flash evaporation - HCBBS Forum
89. Let’s work on questions 12-20 from the 2015 First-Class Constructor Examination, multiple-choice questions on Laws and Regulations, numbers 65-66 - HCBBS Forum
90. The pressure for methanol synthesis cannot be increased, but the pressure difference in the synthesis tower is very high - HCBBS Forum
91. Cold and heat in coal chemical industry: Which sector is seeing growth? - HCBBS Forum
92. Where can the temperatures of the shell and the tubes be seen in the final results at HTRI? - HCBBS Forum
93. 【Daily Question】Question from Issue 20151022 - HCBBS Forum
94. What is the difference between PH and phS in the parameters of circulating water? - HCBBS Forum
95. Are the outlet valves with one in use and one as backup always open? - HCBBS Forum
96. Issues related to heat exchangers - HCBBS Forum
97. Why is only hardness testing performed on Grade I forgings? - HCBBS Forum
98. Does a differential pressure level gauge need to be sent for inspection regularly? - HCBBS Forum
99. What are the requirements for pressure testing after the installation and maintenance of tower equipment? - HCBBS Forum
100. What type of flow meter is used to measure heat transfer oil? - HCBBS Forum