English — Forum #723 (Page 458/642)

1. What are the causes of pressure fluctuations in resin towers and regeneration towers? - HCBBS Forum
2. Communication issues - HCBBS Forum
3. Central state-owned enterprises, state-owned enterprises, and grade distinctions - HCBBS Forum
4. Share free download link for Water Pollution Control Engineering, Volumes 1 and 2 (Gao Tingyao, 3rd edition) - HCBBS Forum
5. Why can’t the gas in a circulating compressor be circulated for a long time? - HCBBS Forum
6. What is the approximate pressure loss when fluid flows through a throttling device? - HCBBS Forum
7. Details of the under-bed ignition system for 75t/h medium-pressure CFB boilers - HCBBS Forum
8. Indicator for determining the acid value of dark-colored carbon nine petroleum resin - HCBBS Forum
9. Do the heat exchange tubes of condensing waste heat boilers have fins? - HCBBS Forum
10. 【Daily Question】Question from Issue 20151113 - HCBBS Forum
11. Which standards specify the classification and details regarding the performance grades or material grades of bolts and nuts? - HCBBS Forum
12. Should a flexible hose be used for loading ethylene oxide (EO)? - HCBBS Forum
13. Corrosion protection for ammonia tank bodies - HCBBS Forum
14. Material issues with the chlorate decomposition heater - HCBBS Forum
15. The problem with methanethiol - HCBBS Forum
16. Let’s discuss the selection of catalytic reaction terminators, as well as the choice of devices for each. - HCBBS Forum
17. Why is 304 stainless steel called 304? ! - HCBBS Forum
18. Discussion on obtaining the electrical safety certificate - HCBBS Forum
19. Wealth, oh wealth, oh wealth, oh wealth, oh wealth, oh wealth - HCBBS Forum
20. What qualifications and regulations are required for manufacturing pressure vessels at atmospheric pressure? - HCBBS Forum
21. Natural gas dehydration - HCBBS Forum
22. What are the differences in manufacturing between atmospheric pressure vessels and pressure vessels? - HCBBS Forum
23. What are the two main categories of wet flue gas denitration technologies? - HCBBS Forum
24. Jin Yong discusses coal chemical industry again: Proceed cautiously with coal-to-gas projects, impose strict restrictions on coal-to-oil projects - HCBBS Forum
25. How is a pressure vessel at normal pressure defined? - HCBBS Forum
26. After the compressed air pipeline has passed the strength test, is it still necessary to conduct a leakage test (air-tightness test)? ? - HCBBS Forum
27. How to prevent freezing in clean air ducts and unclean air ducts? - HCBBS Forum
28. How should the water collection device for the water exiting a cooling tower be designed? - HCBBS Forum
29. Is it necessary to add flame arresters to the outer arch roof of stable crude oil floating roof tanks? - HCBBS Forum
30. Regarding the temperature of the expanded air entering the upper tower - HCBBS Forum
31. What are the critical lower temperature limits for carbon steel and chromium-molybdenum steel? - HCBBS Forum
32. Seek the English template for Sinopec’s DCS specification document - HCBBS Forum
33. One question per day (1108) - HCBBS Forum
34. Design specification requirements - HCBBS Forum
35. Wind energy, hydroenergy, solar energy, nuclear energy – after all these years of development, which one is most likely to become the mainstream? - HCBBS Forum
36. Treatment methods for high-concentration phosphorus-containing wastewater - HCBBS Forum
37. What material should be used for storage tanks to hold dilute sulfuric acid? - HCBBS Forum
38. 【Daily Question】11.13 Multiple-choice Question: When hydrogen embrittlement occurs on the surface of steel, it manifests as - HCBBS Forum
39. Difference between Q345R(HIC) and Q345R(R-HIC) - HCBBS Forum
40. What skills should an instrument engineer and an instrument team leader possess respectively? - HCBBS Forum
41. What is the purpose of feeding pure water into the lower part of the [water mist separator]? - HCBBS Forum
42. I would like to ask how to enter polymerization reactions in Aspen - HCBBS Forum
43. What level of H2S content in the gases emitted by various units in petrochemical plants is considered to indicate acidic gas? - HCBBS Forum
44. What is polyoxysulfuric acid corrosion of austenitic stainless steel equipment? ? ? ? - HCBBS Forum
45. What is a preliminary hazard analysis? - HCBBS Forum
46. Regarding the issue of switching to a different pump - HCBBS Forum
47. Methyl chloroformate - HCBBS Forum
48. 【Daily Question】Multiple-choice question 11.10 During nitrogen leak testing in the hydrogenation and hydrogen-handling system, the safety valve should - HCBBS Forum
49. One question per day (multiple choice) - HCBBS Forum
50. What is the purpose of those flexible hoses for both the inlet and outlet of the circulating water pump? - HCBBS Forum
51. 【Daily Question】 November 17: What should the pressure of the air purification system be controlled at? ? ? ? ? - HCBBS Forum
52. Can superheated steam or saturated steam be used with 304 pipes? - HCBBS Forum
53. 【Daily Question】November 11, 2015: Boiler True/False Questions (3 wealth points for a reply; +3 to 8 additional wealth points for a correct answer) - HCBBS Forum
54. Question about container thickness for 0.2 MPa - HCBBS Forum
55. What are the technical requirements for the manufacturing and installation of distributor heads? - HCBBS Forum
56. 【Daily Question】November 12: Differences in fan pressure between winter and summer (First 80 participants + 2 extra points for each correct answer; 3–8 wealth points additionally) - HCBBS Forum
57. Who has the documents for the liquid sulfur loading process? - HCBBS Forum
58. Questions about acid cleaning and passivation - HCBBS Forum
59. 【Daily Question】November 6, 2015: Participation +2 Wealth； +3 to 8 wealth for correct answers - HCBBS Forum
60. 【Daily Question】Question for Issue 20151114 (Reward for Participation) - HCBBS Forum
61. Regarding the issue of hydrogen emissions - HCBBS Forum
62. Regarding the arrangement of smoke ducts around the helipad on offshore fixed platforms - HCBBS Forum
63. 【Daily Question】Question from Issue 20151110 - HCBBS Forum
64. The diesel tank became cloudy after transfer; what could be the reason? - HCBBS Forum
65. 【Daily Question】2015.11.06 Main stressed components (2 Wealth points for a reply + 3–8 additional Wealth points for a correct answer) - HCBBS Forum
66. 3 years of experience in alkylation, two experiences with initial commissioning – seeking a new opportunity - HCBBS Forum
67. Pressure booster at the top of the vacuum tower - HCBBS Forum
68. Piping design - HCBBS Forum
69. Explanation regarding the principle that \"during the commissioning of heat exchangers, the water temperature rise rate should be kept as low as possible (≯1.5°C/min)\"? - HCBBS Forum
70. Heat exchanger model - HCBBS Forum
71. What should be considered when installing a vortex flowmeter? - HCBBS Forum
72. Flow rate and pressure - HCBBS Forum
73. Thoughts on **the management of chemicals** - HCBBS Forum
74. Everyone, work on question 68-2: Multiple-choice question 54 from the 2015 First-Class Constructor Examination in Project Management; there will be a reward for those who answer it correctly - HCBBS Forum
75. BENTLY probe measurement issues - HCBBS Forum
76. Regarding the issue of nitrogen sealing for containers. - HCBBS Forum
77. Who has a detailed introduction to Axens’ PrimeG+ process in France, along with the operating procedures for related catalytic gasoline hydrogenation units? - HCBBS Forum
78. Corrosion replacement of blast furnace gas pipelines in the coke oven basement - HCBBS Forum
79. How many butane isomerization units have been put into operation in China so far? - HCBBS Forum
80. What should the owner of a new project in a chemical plant do? - HCBBS Forum
81. One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 355 - HCBBS Forum
82. Treatment of high-concentration ammonia-nitrogen wastewater - HCBBS Forum
83. 【Daily Question】Question from Issue 20151109 - HCBBS Forum
84. 【Popular Science Tips on Polymers and Materials】--007 When hot water is poured into a mineral water bottle, it turns white + jlszhoujidai - HCBBS Forum
85. Sign-in record post from November 13, 2015 - HCBBS Forum
86. In metal smelting, the production of which products generates wastewater with high ammonia nitrogen and high salt levels? - HCBBS Forum
87. Jacket anodic protection - HCBBS Forum
88. I propose: seriousness + technology + harmony - HCBBS Forum
89. Pipe diameter, outer diameter, flange diameter – the sizes among them - HCBBS Forum
90. Gauge gasket - HCBBS Forum
91. Screw post grade - HCBBS Forum
92. Civil Engineering Structure Discussion Area ---- [Daily Question] Question from the 20151114 issue - HCBBS Forum
93. Manufacturer for replacing pump components - HCBBS Forum
94. Adopt new energy heating methods to reduce pollution from coal-fired heating - HCBBS Forum
95. A newbie has a question about cold high scores and cold low scores - HCBBS Forum
96. Design of heat exchangers - HCBBS Forum
97. 【Daily Question】Chemical Engineering Principles 229: Parallel Pipelines (November 10) - HCBBS Forum
98. Questions regarding the true vapor pressure - HCBBS Forum
99. 【Daily Question】11.14 Multiple-choice question: The explosion limit of hydrogen sulfide is (based on hydrogen sulfide) - HCBBS Forum
100. Centrifugal compressor - HCBBS Forum