English — Forum #723 (Page 564/642)

1. How to separate a mixed acid of sulfuric acid and *ao acid? - HCBBS Forum
2. Cooling capacity to refrigerant flow rate conversion software - HCBBS Forum
3. 【Basic Knowledge of Glossary Definitions for “Polymers and Materials”-016】Glossary definitions related to polymers - HCBBS Forum
4. Treatment of the unpleasant odor from cold coking water in coking tanks - HCBBS Forum
5. Temperature of the medium-pressure reactor - HCBBS Forum
6. What does “make reference to this paragraph” mean? - HCBBS Forum
7. Safety valve discharges from the extraction tower and the raffinate water washing tower of the aromatic hydrocarbon extraction unit - HCBBS Forum
8. In the chemical industry, is it better to focus on production or safety? - HCBBS Forum
9. What does “implementing act” mean? - HCBBS Forum
10. What kind of day counts as a day at work? - HCBBS Forum
11. Reforming pre-hydrogenation reactor dipleg - HCBBS Forum
12. How is a 4-20mA signal generated? - HCBBS Forum
13. Siphon oil tank pressure of high-speed pump - HCBBS Forum
14. Which is more accurate for calculating heat exchangers, EDR or HTRI? - HCBBS Forum
15. Which specialty should be responsible for determining the classification of explosive hazard areas? - HCBBS Forum
16. Gasketed salt acid storage tank - HCBBS Forum
17. When calibrating the safety valve of a machine, must it be checked against the set pressure indicated on the label? - HCBBS Forum
18. Interesting chemical engineering questions - 5: Why does gypsum in seawater not precipitate easily? Standard answer already exists - HCBBS Forum
19. How to calculate the length of the weld that is enclosed by the opening - HCBBS Forum
20. Please ask an expert to explain a few terms! - HCBBS Forum
21. What are the main light components in the overhead stream of the diesel hydrocracking hydrogen sulfide removal stripping tower? - HCBBS Forum
22. Simulation of bubble column reactors - HCBBS Forum
23. AC for asphalt production plants - HCBBS Forum
24. Summary of Equipment Purging Work - HCBBS Forum
25. How should waste lubricating oil from mechanical pumps be disposed of? - HCBBS Forum
26. There is some uncertainty regarding the definition of pump head - HCBBS Forum
27. Oxidative dehydrogenation to butadiene - HCBBS Forum
28. I would like to ask how, in industry, heat is supplied from the overhead condenser of a distillation tower to the reboiler? - HCBBS Forum
29. 【Daily Question】Question from Issue 20150819 - HCBBS Forum
30. For personal safety, it is essential to learn earnestly from the lessons of the accident in Binhai New Area, Tianjin. - HCBBS Forum
31. Selection of sulfur foam tank level gauge (with agitator) - HCBBS Forum
32. Chemical Engineering in Daily Life – Question 21: Are those methods for removing formaldehyde from indoor air really effective? Standard answer already exists - HCBBS Forum
33. Centrifugal pumps are facing problems - HCBBS Forum
34. The overall axial membrane stress in an internally pressurized cylinder is always half of the overall circumferential membrane stress. - HCBBS Forum
35. Overheating of the working fluid in the water ring vacuum pump - HCBBS Forum
36. Compressor volumetric flow rate - HCBBS Forum
37. Note: Real exam questions from 2011, Knowledge section, afternoon session, question 64 - HCBBS Forum
38. How is flange thermal fastening accomplished? - HCBBS Forum
39. Problems in simulating azeotropic compositions - HCBBS Forum
40. As an owner, how can someone with a background in process development move towards a career in project management? - HCBBS Forum
41. May I ask: does anyone know anything about the current situation of methyl formate, both domestically and internationally? - HCBBS Forum
42. Selection of the medium outlet temperature for air coolers in process design - HCBBS Forum
43. Weekly topic: 5 wealth points for those who answer correctly, 2 wealth points for participation； Question 145 - HCBBS Forum
44. One's background in the design field is extremely important - HCBBS Forum
45. I would appreciate guidance from experts on the methods for adjusting the outlet temperatures at each stage of the three-stage reciprocating fresh hydrogen compressor - HCBBS Forum
46. 【Daily Question】Question from Issue 20150811 - HCBBS Forum
47. Fixed-bed offset flow problem - HCBBS Forum
48. Liquefied Air Fujian Ammonia Synthesis Recruitment - HCBBS Forum
49. I have questions regarding several materials; could some expert help resolve them? - HCBBS Forum
50. The motor started but stopped automatically after a while - HCBBS Forum
51. What is the difference between cold standby and idle mode? - HCBBS Forum
52. Several issues with the dry quenching unit for coke - HCBBS Forum
53. What kind of prototype products are generally used for the A2 pressure vessel manufacturing certificate nowadays? - HCBBS Forum
54. In the design of water supply, drainage, and fire protection systems for petrochemical industries, how should the outer diameter and wall thickness of steel pipes be determined? - HCBBS Forum
55. Range of wire bridging - HCBBS Forum
56. Selection of sulfuric acid pumps - HCBBS Forum
57. Can rectangular containers be supported by a skirt? ! - HCBBS Forum
58. Dear Haiyou, please help calculate the amount of caustic soda required to adjust the pH of the sewage tank! ! - HCBBS Forum
59. One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 278 - HCBBS Forum
60. Is there really no solution for high-salt, high-COD wastewater? - HCBBS Forum
61. 【Daily Question】2015.08.19 Medium Classification (Top 100 replies + 2 wealth points; additional 3–8 wealth points for correct answers) - HCBBS Forum
62. Some issues regarding steam valve leakage and condensate return valve dripping - HCBBS Forum
63. If the liquid feed rate drops suddenly, how do the parameters related to the distillation column change? - HCBBS Forum
64. The equipment of the unit is equipped with two safety valves – do both have to be in use? - HCBBS Forum
65. Calculation of local stresses induced by external loads on plate heat exchangers - HCBBS Forum
66. Can nylon tubing for control valves be used in the Yulin area of Shanxi? - HCBBS Forum
67. 【Weekly Topic】20150817 What are the main hazards of scale to boiler operation? (Participation rewards available) - HCBBS Forum
68. Daily Question: Coke powder shaping and gasification issues - HCBBS Forum
69. What will happen to the modification of a pressure cooker? - HCBBS Forum
70. Chemical industry tip: The difference between DN and De - HCBBS Forum
71. Problems with the flash vaporization arrangement - HCBBS Forum
72. What is the reason for the light yellow-green color of hydrocracked diesel? - HCBBS Forum
73. What is the catalyst for FV-10? What are the performance parameters? - HCBBS Forum
74. Repost—Industry Observer: My 7-year experience in the coal chemical industry, along with insights on the energy sector - HCBBS Forum
75. Impurity issues in crude methanol - HCBBS Forum
76. Just preparing the drawings for the exchanger tube bundle and classifying them - HCBBS Forum
77. Benefits at Dalian Hengli Petrochemical - HCBBS Forum
78. Can the air supply pipeline for the pneumatic valve be introduced from the lower level? - HCBBS Forum
79. Maintenance of low-temperature liquid storage tanks - HCBBS Forum
80. NB/T47014 Appendix D: Welding procedure qualification for heat exchange tubes and tube sheets – separate qualification or combined qualification - HCBBS Forum
81. How to determine whether paint is water-based or oil-based - HCBBS Forum
82. Prospects for piping and process engineering in static equipment - HCBBS Forum
83. Weekly topic: 5 Wealth points for those who answer correctly, 2 Wealth points for participation； Question 146 - HCBBS Forum
84. Request Chinese version markings for API650 - HCBBS Forum
85. Actually, a question related to boilers will be asked; those who rank in the top 30 will receive a certain score - HCBBS Forum
86. Determination of the gas volume for oil and vapor recovery in storage tanks - HCBBS Forum
87. How much of the steam generated in the flash tank of the steam generation system condenses through the pipes? - HCBBS Forum
88. Is 0.6mm S22053 duplex steel available easily in the market? - HCBBS Forum
89. How to find the minimum thickness of pressure pipes - HCBBS Forum
90. Daily Question: Environmental Knowledge (August 11) (2 points for answering, +4 points for a correct answer) - HCBBS Forum
91. Vacuum pump pumping time - HCBBS Forum
92. Why can’t lucky points be exchanged for wealth points? - HCBBS Forum
93. The important role of the overload protection device in cantilever cranes - HCBBS Forum
94. Regarding the painting issue of fasteners for non-standard equipment - HCBBS Forum
95. Chemical Engineering in Daily Life - Question 5 - Standard Answers Available - HCBBS Forum
96. Is there any method for producing hydrogen from liquefied gas? - HCBBS Forum
97. The technical development level of instrumentation and automation in China - HCBBS Forum
98. Seeking assistance with the design of storage tanks for chlorobenzene and similar substances - HCBBS Forum
99. 【Basic Knowledge of Glossary Definitions for “Polymers and Materials”-021】Glossary definitions related to polymers - HCBBS Forum
100. Is it possible to extract tar from tar residue? - HCBBS Forum