English — Forum #337 (Page 5/163)

1. How can the thermal engineering field in petrochemical design institutes develop? After working there for a few years, is it possible to switch to work at power design institutes or municipal design institutes? Are there any senior thermal engineers? - HCBBS Forum
2. Fundamentals of Manufacturing Processes (Multiple Choice) 20181216 - HCBBS Forum
3. May I ask what types of drawings are required for the electrical, instrumentation, and automatic control aspects of a project? The more detailed, the better - HCBBS Forum
4. Which teacher has information on the freezing points of sodium hypochlorite solutions at different concentrations? - HCBBS Forum
5. Selection of insulation and heat protection materials and their thicknesses for equipment and pipelines - HCBBS Forum
6. Calculate thickness using temperature difference and thermal conductivity - HCBBS Forum
7. Pneumatic conveying in riser reactors - HCBBS Forum
8. Animated video: 37 principles of chemical reactions and their dangers – Mercury and aluminum rust. - HCBBS Forum
9. Adding acid to adjust pH in industry - HCBBS Forum
10. Regarding the issuance of processes for chlorination, nitration, sulfonation, polymerization, fluorination, hydrogenation, oxidation, peroxidation, diazotization, cracking (.... - HCBBS Forum
11. 8.2-Daily Quiz (Pharmaceutical Engineering Version) GMP Knowledge Contest - HCBBS Forum
12. Material selection for solid sodium hydroxide dissolution tanks - HCBBS Forum
13. Expert appraisal of the scientific and technological achievements related to polyoxymethylene fiber aerogels by Kailuan Group has been completed - HCBBS Forum
14. Regarding the slurry catalysts for full-density polyethylene in fluidized beds, how does T3/DC affect the hydrogen blending copolymerization behavior? - HCBBS Forum
15. What is the formula for calculating the volume of different liquid levels in a spherical tank? What is the formula for calculating the volume of different liquid levels in a horizontal storage tank with a head? - HCBBS Forum
16. What are the precautions for operating a water ring vacuum pump? - HCBBS Forum
17. How is pneumatic valve interlock represented? - HCBBS Forum
18. Does anyone know the size of the flange gasket for the H44H-150LB-DN700 swing check valve? - HCBBS Forum
19. Design institutes for nitric acid plant systems and equipment manufacturers - HCBBS Forum
20. Regarding the low liquid level alarm caused by venting of the reactor liquid (process interlocks, alarm management) - HCBBS Forum
21. Fundamentals of Processing Technology (Multiple Choice) 20181128 - HCBBS Forum
22. Help-seeking criteria - HCBBS Forum
23. 【HVAC Version】Daily Question 20180704 - HCBBS Forum
24. The most comprehensive checklist for reviewing 3D models of chemical plants - HCBBS Forum
25. How many exhaust streams can a chimney accommodate at most? ? Are there any regulatory requirements? - HCBBS Forum
26. [Daily Question] Basic Process Knowledge (True/False Questions) 20191221 - HCBBS Forum
27. To heat pure water using wastewater at 100°C and make use of the waste heat, what type of heat exchanger scheme should be employed? - HCBBS Forum
28. Is a chimney considered an open-flame device? - HCBBS Forum
29. Problem of uneven pressure in gas pipeline branches - HCBBS Forum
30. [Daily Question] Basic Process Knowledge (Multiple Choice) 20190128 - HCBBS Forum
31. Hydrolysis of carbonyl sulfide to hydrogen sulfide - HCBBS Forum
32. How should the inlet and outlet valves of the steam cylinders be configured? - HCBBS Forum
33. Seek sodium methoxide design institute - HCBBS Forum
34. Look, what is this device and what is it used for? - HCBBS Forum
35. Design choices for pressure vessel welds - HCBBS Forum
36. The control room is located in an explosion-proof area; what should be done with the control cabinets? - HCBBS Forum
37. I have a question regarding the cooling of wet air - HCBBS Forum
38. Alarm values for temperature and level of coal tar storage tanks - HCBBS Forum
39. The temperature is negative during reactor purging - HCBBS Forum
40. Basic Process Knowledge (Multiple Choice) 20180207 - HCBBS Forum
41. Reward for information on the installation of safety valves before and after the pressure relief valve - HCBBS Forum
42. For gases heated to 280–300, what is the best method? - HCBBS Forum
43. How to convert calorific value into temperature rise - HCBBS Forum
44. Basic Process Knowledge (Multiple Choice) 20180412 - HCBBS Forum
45. May I ask whether compressed air or nitrogen with the same mass flow rate can use the same pipe diameter even if their pressures are different? - HCBBS Forum
46. What is the purpose of connecting a nitrogen supply to the fan? - HCBBS Forum
47. Electrodes for mist removal in sulfuric acid plants - HCBBS Forum
48. Process Section – Daily Hydrogenation Process Knowledge Question No. 041 - HCBBS Forum
49. Does anyone know anything about thermally conductive plastics? - HCBBS Forum
50. Who knows the progress of Cangzhou Dahua’s MDI project? - HCBBS Forum
51. [Daily Question] Basic Process Knowledge (Multiple Choice) 20190120 - HCBBS Forum
52. 【 Weekly Topic】【 Quality Version 20170106】 - HCBBS Forum
53. Let’s discuss again the differences and similarities between safety inspections, fire safety inspections, occupational health inspections, and environmental protection inspections - HCBBS Forum
54. 【Frontiers in HaiChuan Chemical Technology】New approaches for the reuse of halogenated organic pollutants have been developed - HCBBS Forum
55. What material should be used for flame arresters on acidic exhaust gases (such as small amounts of hydrochloric acid, hydrogen bromide, dichloroethane, etc.)? - HCBBS Forum
56. 【Frontiers of HaiChuan Technology】A new type of zeolite molecular sieve synthesized by a Chinese research team for the efficient conversion of heavy oil - HCBBS Forum
57. How is the removal or recovery of acetaldehyde achieved in the process for producing vinyl acetate? Which expert has literature on this topic? - HCBBS Forum
58. Regarding hazardous chemical processes - HCBBS Forum
59. Ammonia synthesis tower shell temperature - HCBBS Forum
60. Is there a possibility of polymerization-induced overpressure at the safety valve interface of the loop reactor in a polypropylene plant? - HCBBS Forum
61. Problem with the two nozzles of liquid ammonia cylinder 800L - HCBBS Forum
62. What is the purpose of adding a needle valve after the boiler water flow control valve? - HCBBS Forum
63. What to do if the book containing the published paper is lost? - HCBBS Forum
64. The issue of the speed of temperature increase and decrease? - HCBBS Forum
65. Can the boilers in chemical enterprises handle chemical emission gases? Do the regulations permit this? Please give some advice - HCBBS Forum
66. Compressibility factor of gas - HCBBS Forum
67. What material should be used for 50% hydrogen peroxide at a pH of around 1? Do pipes with a diameter of DN50 or more fall under pressure pipelines? - HCBBS Forum
68. Determine the diameter using the temperature obtained after mixing at 2 different temperatures - HCBBS Forum
69. Contents of professional design in chemical engineering processes - HCBBS Forum
70. Calculation of air leakage rate in the vacuum system of a decompression tower - HCBBS Forum
71. Applying for a job as a chemical engineer, with an intermediate professional qualification certificate - HCBBS Forum
72. Is it a requirement to use a dip pipe for unloading flammable liquids? - HCBBS Forum
73. Distance between overhead coal gas pipelines and buildings - HCBBS Forum
74. How to solve the problem of peak steam load? - HCBBS Forum
75. Is the pipeline flow rate related to desulfurization? - HCBBS Forum
76. The materials for the stainless steel hoses used for the air supply in pneumatic valves, as well as the air supply valves and pneumatic triple units, – who is responsible for installing these air supply pipelines for the pneumatic valves? - HCBBS Forum
77. Fundamentals of Manufacturing Processes (True/False Questions) 20170901 - HCBBS Forum
78. Could we discuss the use of Pipeflow for calculating pumps in complex piping systems? - HCBBS Forum
79. There’s a pipe blockage issue here; I’d like some advice - HCBBS Forum
80. May non-metallic (flammable) pipes be used in Class A and B explosion-proof areas? ? What should be done if it’s necessary to use it due to corrosion issues? - HCBBS Forum
81. May I ask if formaldehyde can be removed through flashing or stripping? - HCBBS Forum
82. Pump selection and calculation - HCBBS Forum
83. Guess what device this is? - HCBBS Forum
84. If a canopy is built over an outdoor Class A liquid storage tank with a capacity of 50 cubic meters, does that make it a warehouse? ? - HCBBS Forum
85. Selection of distillation column reflux method - HCBBS Forum
86. Abnormality in the internal pipelines of the torch - HCBBS Forum
87. Regional Distribution Atlas of the “Academicians Cluster” in the Chemical Field: Which Region Leads the Way? – South China Region - HCBBS Forum
88. After the pump motor is driven by variable frequency, is there no such thing as **secondary energy efficiency** for the motor anymore? - HCBBS Forum
89. Basic Process Knowledge (Multiple Choice) 20181126 - HCBBS Forum
90. 【Daily Question】 【AC Version for Static Equipment...Question 110】 April 20, 2019 – Revised multiple-choice questions...Everything is going well - HCBBS Forum
91. In an interlock logic diagram, what does E. S/D PB NOT PRESSED mean? - HCBBS Forum
92. What is the market price of sodium hydrosulfide, and are sales good? - HCBBS Forum
93. Manufacturers of reaction kettle equipment for chemically synthesized active pharmaceutical ingredients - HCBBS Forum
94. Inconsistent CO2 property queries - HCBBS Forum
95. Old K says every week – talking about things in the petrochemical design industry. Post 48: The maximum flow rate can be used to determine the capacity of gravity-fed pipelines - HCBBS Forum
96. [Daily Question] Basic Process Knowledge (True/False) 20190607 - HCBBS Forum
97. Installation issues with high-pressure airless nozzles - HCBBS Forum
98. Industrial equipment - HCBBS Forum
99. Basic Process Knowledge (Multiple Choice) 20180413 - HCBBS Forum
100. [Daily Question] Basic Process Knowledge (True/False: Fill in “√” for correct and “×” for incorrect) May 23, 2020 - HCBBS Forum