English — Forum #723 (Page 495/642)

1. Adjustment of oil viscosity - HCBBS Forum
2. Environmental Protection Daily Quiz 10.11: Participate for prizes; 3 correct answers earn an additional prize of 2 - HCBBS Forum
3. Comparison of seven sludge treatment and disposal process technologies - HCBBS Forum
4. Thin-walled sleeve with end sealing. Small holes with a diameter of less than 4 mm are made in the sleeve; natural gas passes through these holes. How is resistance calculated? - HCBBS Forum
5. Nozzle replacement - HCBBS Forum
6. What is a generation gap? - HCBBS Forum
7. How is the volume fraction of a gas mixture converted to a mass ratio? - HCBBS Forum
8. Why is the stripping tower in the low-temperature methanol washing unit shaking violently back and forth? - HCBBS Forum
9. What is the impact of separation efficiency on the synthesis reaction? - HCBBS Forum
10. One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 331 - HCBBS Forum
11. Catalytic cracking MIP process quench oil atomization steam - HCBBS Forum
12. Texaco’s main equipment - HCBBS Forum
13. Let’s work on questions 05-20 from the 2015 First-Class Constructor Examination – multiple-choice questions on Laws and Regulations, questions 21-22 - HCBBS Forum
14. During the Mid-Autumn Festival, let’s all share some delicious food - HCBBS Forum
15. What is the significance of controlling the temperature of the gas after it has been cooled by synthetic water? - HCBBS Forum
16. Selection of standard gas concentration range for toxic gases - HCBBS Forum
17. Water quality issues in circulating water systems - HCBBS Forum
18. What are the valve brands under Emerson? - HCBBS Forum
19. Question 60 on the foundation of Furnace 10/13: (A certain score is given to the top 40) - HCBBS Forum
20. How to calculate the saturated water content in nitrogen - HCBBS Forum
21. The cycle rate of UOP continuous reforming catalysts fluctuates greatly - HCBBS Forum
22. Since the environmental impact assessment hasn’t been approved, is this still useful? - HCBBS Forum
23. Which measuring instrument is suitable for measuring steam in large-diameter pipelines - HCBBS Forum
24. Regarding the integrated filtering, washing, and drying machine - HCBBS Forum
25. On differential pressure switches in metric and imperial systems - HCBBS Forum
26. With the chemical industry in such a poor state these days, should one consider changing careers? - HCBBS Forum
27. 【Daily Question】10. A high characteristic factor K value indicates what type of hydrocarbons are present in large quantities? - HCBBS Forum
28. Have the gas cylinder standards been repealed? - HCBBS Forum
29. What are the products made from urea as a raw material? - HCBBS Forum
30. What to do if the phenol content in the circulating oil is above the limit? - HCBBS Forum
31. Pulse signals, step signals – air compressors - HCBBS Forum
32. 【Daily Question】Question from Issue 20151008 - HCBBS Forum
33. Are there any LNG manufacturing plants? Quotation -- Design, manufacturing, construction - HCBBS Forum
34. Is it necessary to install a flame arrester on the central vent at the top of an internal floating roof tank? - HCBBS Forum
35. How can one become a quality inspector for marine valve and pipeline systems? - HCBBS Forum
36. 【Daily Question】Question from Issue 20151015 - HCBBS Forum
37. The sharp drop in crude oil prices does not change the expectation of price increases; however, it will still lead to a cooling down in the refined oil market - HCBBS Forum
38. What should be done if something gets stuck in the hydrogen tank used for caustic soda? - HCBBS Forum
39. Don’t mess with kids–let’s prevent another tragedy from happening - HCBBS Forum
40. Bingtong - HCBBS Forum
41. What do people think about Odom being in critical condition? - HCBBS Forum
42. Environmental Protection Daily Question 10.8: Participate for a prize; additional rewards for correct answers - HCBBS Forum
43. 【Daily Question】Question from Issue 20151014 - HCBBS Forum
44. Can the heat exchange tubes and tube sheets be made of different materials? - HCBBS Forum
45. Vacuum processes in fine chemical industry - HCBBS Forum
46. ~~Share your Taobao vs JD.com shopping list – a gift awaits if you share it (⊙o⊙)~~ - HCBBS Forum
47. Is it being implemented as specified in P46 of the explosion protection regulations, which states that \"for process equipment with a volume not exceeding 95 m3 and a radius of 4.5 M, it is classified as Zone 2\"? - HCBBS Forum
48. Briefly describe the main sources of chemical pollutants. - HCBBS Forum
49. 【Weekly Topic】Steam Target Practice - HCBBS Forum
50. Fresh graduate newbie seeking a job - HCBBS Forum
51. Hydrogen peroxide rinsing process - HCBBS Forum
52. Hardness of forgings - HCBBS Forum
53. Weekly topic: 5 Wealth points for correct answers, 2 Wealth points for participation； Question 190 - HCBBS Forum
54. The original feeding issue of the tower - HCBBS Forum
55. How many types of cooling towers are there? - HCBBS Forum
56. Are there any good methods for machining and drilling holes in ring pipes? - HCBBS Forum
57. Fundamentals of Chemical Engineering: One Question per Day – Fluids Knowledge - HCBBS Forum
58. Who has the regulations for the management of large-scale units? - HCBBS Forum
59. Steps for commissioning a new diesel hydrofinishing unit – please help with the details - HCBBS Forum
60. A total of 930,000 tons of methanol have been produced - HCBBS Forum
61. Salt acid shower one-way valve - HCBBS Forum
62. Differences between BDV valves and BV valves in natural gas stations - HCBBS Forum
63. Is it necessary to use explosion-proof electrical equipment? - HCBBS Forum
64. Problems in industrial water quality testing - HCBBS Forum
65. On the economics of producing methane using H2 in the coal hydrogenation to methane technology - HCBBS Forum
66. Safety risks associated with excessive oxygen content in heating furnaces - HCBBS Forum
67. 【Daily Question】Question from Issue 20151009 - HCBBS Forum
68. 【Daily Question】Wastewater Knowledge - 10.15 (Answer +2, Correct Answer +4) - HCBBS Forum
69. How is the cycle for overhauling equipment in chemical plants determined? - HCBBS Forum
70. Can a reciprocating compressor be operated without a return line? - HCBBS Forum
71. Differences in the applications of ammonia permeation and helium permeation - HCBBS Forum
72. What is the purpose of calibrating a flow meter? - HCBBS Forum
73. Intermediate certificate - HCBBS Forum
74. Seeking help regarding a 20-cubic-meter tank for concentrated sulfuric acid - HCBBS Forum
75. Problems with shaft turning in centrifugal compressor units - HCBBS Forum
76. How do pressure relief devices address corrosion issues? - HCBBS Forum
77. Why is a \"Comprehensive Material Table\" needed? - HCBBS Forum
78. Treatment of resin wastewater - HCBBS Forum
79. How to choose a cooling tower filler? - HCBBS Forum
80. Flow rate of the DN200 inlet main pipe pump - HCBBS Forum
81. Selection of the discharge valve - HCBBS Forum
82. 【Daily Question】10.16 True or False: The working principle of a refrigeration compressor (+20 wealth) - HCBBS Forum
83. 【Daily Question】Chemical Engineering Principles 201: Drying (October 13) - HCBBS Forum
84. Work Safety Supervision Bureau: Qualification requirements for torch design - HCBBS Forum
85. What problems can occur in actual production due to an inadequate design of the bubble tray or improper operation? - HCBBS Forum
86. How should the valves required by TSO be implemented? - HCBBS Forum
87. Post the lecture video on Mechanical and Electrical Practice by Dong Meiying from 2015, in which Haiyou is seeking help - HCBBS Forum
88. List of attendees at the 2014-2015 Hydrogen Production by Hydrogenation Conference - HCBBS Forum
89. How to do a good job in equipment management in chemical enterprises - HCBBS Forum
90. Differences between the butane stripping tower and the hydrogen sulfide stripping tower \How to consider these factors during design - HCBBS Forum
91. What are the facilities for preventing accidents? - HCBBS Forum
92. What are the foreign brands of valves with a carbon steel lining and PVDF coating? - HCBBS Forum
93. I would like to ask, what software is used for simulation calculations of ammonia absorption? - HCBBS Forum
94. 【Daily Question】Question from Issue 20151009 - HCBBS Forum
95. Between paste form and glass flake, which provides better corrosion protection after using epoxy furan modified resin? - HCBBS Forum
96. There’s a shop for sale at the entrance of the residential complex; I want to buy it but I’m not sure what needs to be done - HCBBS Forum
97. What technical requirements must be met when installing a standard throttle device? - HCBBS Forum
98. Workplace Debate Episode 65: Which is more attractive, a high salary or stability? (Plus 3 wealth for participating in the reply) - HCBBS Forum
99. Regarding early-stage technology and market aspects versus later-stage project issues, which is more important? - HCBBS Forum
100. How to prevent corrosion of the main unit and its accessories after the turbine is shut down - HCBBS Forum