English — Forum #723 (Page 457/642)

1. The valve seat of the second-stage inlet valve in reciprocating compressors is prone to cracking - HCBBS Forum
2. Questions regarding the selection of design standards for automated instruments - HCBBS Forum
3. Can a pump foundation be built directly on concrete ground? - HCBBS Forum
4. Then, what type of gasket should be used? What factors need to be considered when selecting gaskets for flammable and explosive liquids? - HCBBS Forum
5. 【Daily Question】November 12, 2015: Horizontal Tank Saddle (2 wealth points for a reply + 3–8 additional wealth points if the answer is correct) - HCBBS Forum
6. Welcome all marine friends to the boiler section to answer questions; there’s plenty of knowledge to be gained, and plenty of rewards as well. - HCBBS Forum
7. What are the process parameters of a methanol level gauge? - HCBBS Forum
8. Working principle of desulfurization tank - HCBBS Forum
9. The pipe sizes follow the HG20553Ⅰb series; what standard should be used for the connected fittings? - HCBBS Forum
10. Penalties for safety accidents under the Safety Law - HCBBS Forum
11. Material standards for fire hydrant covers - HCBBS Forum
12. What are the regulations regarding containers operating under \"low temperature and low stress conditions\"? - HCBBS Forum
13. Plastic pump grounding issue - HCBBS Forum
14. Regarding how to urgently terminate the polymerization reaction in a 30m3 reactor during a power outage - HCBBS Forum
15. Environmental Protection Daily Question 11.7: Participate for a prize; 3 correct answers earn an additional prize of 2 - HCBBS Forum
16. 【Daily Question】Multiple-choice question 11.9: When sulfiding a general hydrogenation catalyst, once the H2S partial pressure in the recycle hydrogen reaches a certain value, - HCBBS Forum
17. Resource requirements for non-destructive testing in the manufacture of Class D pressure vessels - HCBBS Forum
18. Experts, I have questions regarding the manual valve on the furnace burner and the fuel gas pressure control valve, and I would like to seek your advice. - HCBBS Forum
19. 【Daily Question】November 6, 2015: Boiler True/False Questions (2 wealth points for replying, plus 3–8 additional wealth points for correct answers) - HCBBS Forum
20. Weekly topic: 5 Wealth points for those who answer correctly, 2 Wealth points for participation； Question 217 - HCBBS Forum
21. The simplest and most effective method to reduce nitrogen oxide emissions in coal-fired fluidized bed boilers - HCBBS Forum
22. Everyone, take question 61-2: multiple-choice questions 43-43 from the 2015 First-Class Constructor Examination in Project Management; there will be a reward for those who answer correctly - HCBBS Forum
23. Operating procedures for high-speed vertical centrifugal pumps and submersible pumps - HCBBS Forum
24. Could someone explain ammonia-based desulfurization, and are there any current applications of this method in China? - HCBBS Forum
25. What are the factors that affect the removal of ** in coking wastewater treatment? - HCBBS Forum
26. High-quality ball valve, API608, VQR2AL00, RF, 150LB - HCBBS Forum
27. What is the function of the air hole at the top of the main body of a magnetic flap level gauge? - HCBBS Forum
28. What is cavitation in fluids? What impact does it have on vortex flowmeters? - HCBBS Forum
29. One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 362 - HCBBS Forum
30. 【11.12-18 Weekly Question】+3 points for participation, +4~17 points for correct answer - HCBBS Forum
31. Double-flange diaphragm level gauge - HCBBS Forum
32. During the shutdown for maintenance in the hydrogen production plant, external hydrogen supply is used – how should the hydrogen consumption be calculated? - HCBBS Forum
33. PID diagram Instrument letter codes - HCBBS Forum
34. 【Daily Question No. 54】November 13, 2015: +2 wealth for participation, +3 to +8 wealth for correct answers - HCBBS Forum
35. Regarding minimum temperature requirements for transportation - HCBBS Forum
36. One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 358 - HCBBS Forum
37. Ammonia in raw coal gas - HCBBS Forum
38. Newbie in wastewater field seeking advice - HCBBS Forum
39. Operational summary of the 5 Shell coal gasification units currently in operation in China - HCBBS Forum
40. Suggestions for the Daily Environment Protection Question - HCBBS Forum
41. Civil Engineering Structure Discussion Area ---- [Daily Question] Question from the 20151116 issue - HCBBS Forum
42. One question per day (1115) - HCBBS Forum
43. What causes yellow smoke to be emitted during the quenching of slag and water in lead paste grid production using a blast furnace?/ - HCBBS Forum
44. Solving a problem related to steam tracing for instruments - HCBBS Forum
45. What are the factors that influence dirt formation? - HCBBS Forum
46. 【Popular Science on Polymers and Materials】--009 Why does tying things with plastic rope become looser over time? +jlszhoujidai - HCBBS Forum
47. Dichlorodihydrosilicon retrodisproportionation - HCBBS Forum
48. 【Daily Question】 November 10: What is the main form of friction in commonly used contact mechanical seals? ? ? - HCBBS Forum
49. There are no joints in the end caps; what should be done if the end caps purchased have joints? - HCBBS Forum
50. How to deal with oil contamination in methanol from low-temperature methanol washing - HCBBS Forum
51. 【Daily Question】11.11 Multiple-choice question: The lowest oil temperature at which oil can catch fire spontaneously is called ( ) - HCBBS Forum
52. What is the difference between pre-furnace hydrogen mixing and post-furnace mixing? - HCBBS Forum
53. Regarding PID control - HCBBS Forum
54. Will switching the production of a full-density polyethylene plant affect output? - HCBBS Forum
55. Urgent! One set of instructions for the ultrasonic flowmeter - HCBBS Forum
56. China Coal Chemicals Monthly Report October 2015 - HCBBS Forum
57. What are the standards for determining the specifications and length of fasteners? - HCBBS Forum
58. The active alumina in the Klaus catalyst undergoes a hydration reaction with water vapor - HCBBS Forum
59. Principle and calculation formula of power generation based on saturated vapor pressure difference - HCBBS Forum
60. “The meaning of the model designation “YJF-L10H” for high-pressure hydraulic stop valves - HCBBS Forum
61. Fluoride-containing wastewater treatment - HCBBS Forum
62. Workplace Debate Episode 70: Should one learn more skills or management skills in their youth? - HCBBS Forum
63. Seeking paid services from experts familiar with PSA adsorbents - HCBBS Forum
64. What’s wrong with Wang Gang? - HCBBS Forum
65. The alkali level in the IC tank is high – what should be done? I seek advice from experts! - HCBBS Forum
66. How can pressure vessels be classified according to their shell structure? - HCBBS Forum
67. How to enter the calculated values of local stress for SW6 - HCBBS Forum
68. The function of the minimum flow line in the reforming unit - HCBBS Forum
69. Deep extraction and shallow extraction schemes - HCBBS Forum
70. Difference between armored thermoresistors and assembled thermoresistors - HCBBS Forum
71. 【Daily Question】November 14, 2015: Boiler True/False Questions (3 wealth points for replying; +3 to 8 additional wealth points for correct answers) - HCBBS Forum
72. 【Daily Question】Question from Issue 20151110 - HCBBS Forum
73. Team leader - HCBBS Forum
74. Regarding the issue of catalyst sulfidation - HCBBS Forum
75. One question per day - HCBBS Forum
76. Methanol reaction - HCBBS Forum
77. Pneumatic control valve - HCBBS Forum
78. Calculation of plate-fin heat exchangers, heat transfer area, and calculation software - HCBBS Forum
79. Low oil prices lead to delays in the commissioning of multiple coal tar hydrogenation units - HCBBS Forum
80. Which level gauge should be used to determine the oil-water interface in an extraction tower? - HCBBS Forum
81. Catalyst raw material issue - HCBBS Forum
82. Is it necessary to install a steam trap at the end of the steam purging pipeline? - HCBBS Forum
83. Principles of chemistry in daily life – trembling when urinating - HCBBS Forum
84. Post floor naming - HCBBS Forum
85. Blended coking wax oil - HCBBS Forum
86. How should one view the situation of having enjoyed a beautiful view but not having any photos as a reminder?” - HCBBS Forum
87. What are the environmental corrosion factors for flue gas desulfurization equipment? What are the respective impacts? - HCBBS Forum
88. Mobile phones can also be used, along with Internet software—for thermal calculations of coils submerged in a constant-temperature bath. - HCBBS Forum
89. Joint Learning*1110: +2 wealth for participation, +9 wealth for correct answers - HCBBS Forum
90. 【Daily Question】True or False 11.8 During the actual pre-sulfiding process of catalysts - HCBBS Forum
91. What does the two-phase flow in the regenerator that people often talk about refer to? - HCBBS Forum
92. Issues regarding the adjustment and calibration of safety valves - HCBBS Forum
93. How much more can the use of imported crude oil be increased? - HCBBS Forum
94. How to handle the large amount of process data generated by DCS - HCBBS Forum
95. Observe people - HCBBS Forum
96. 【Daily Question】Question from Issue 20151109 - HCBBS Forum
97. Ten technologies regarding nitrogen fertilizers - HCBBS Forum
98. What are the steps for an emergency shutdown of a cyclic compressor? - HCBBS Forum
99. 【Weekly Question】+9 for correct answers, +2 for participation； Close this post on Sunday - HCBBS Forum
100. Complains about breaking the golden egg – it’s a shame that it happened 6 times in total - HCBBS Forum