English — Forum #723 (Page 629/642)

1. On the recycling of condensate water - HCBBS Forum
2. Questions regarding helium testing of equipment - HCBBS Forum
3. 【Daily Question】June 9 – Compressor flow rate issue (First 80 participants get +2 points; those who answer correctly receive an additional 3–8 wealth points) - HCBBS Forum
4. Guys, tell me, how many points can one get for the cases related to the three chapters on fluid flow, heat transfer, and mass transfer if they master them well? - HCBBS Forum
5. Seeking talent in hydrogenation technology - HCBBS Forum
6. 【Weekly Topic】(30) June 8, 2015: What are the requirements for the working environment of a spectrophotometer? - HCBBS Forum
7. The sulfur content in the raw material exceeds the standard - HCBBS Forum
8. Silicone paint - HCBBS Forum
9. How to switch the main feedwater circuit for firing the furnace - HCBBS Forum
10. Daily Question June 4, 2015 (Safe Communication): A reward of 3 wealth points for replies; 3 additional wealth points for correct answers – participation comes with a reward - HCBBS Forum
11. 2015 First-Class Constructor Exam - HCBBS Forum
12. What to do if the MVR has a high vacuum level, a low system boiling point, and low evaporation capacity? - HCBBS Forum
13. Attachments cannot be added when posting - HCBBS Forum
14. Superheated steam - HCBBS Forum
15. Division of pressure grades for process pipelines - HCBBS Forum
16. Transmitter open-circuit protection output - HCBBS Forum
17. Light gas alarm for rectifier transformer - HCBBS Forum
18. Which domestic manufacturers produce high-quality vacuum pumps? - HCBBS Forum
19. 【Weekly Topic】- “Gambling” at Work” - HCBBS Forum
20. Oxygen station off-gas recovery - HCBBS Forum
21. Why is the production capacity of a settler related to the settling velocity and settling area, but not to the settling height? - HCBBS Forum
22. Regarding the retirement of steel wire ropes for lifting purposes - HCBBS Forum
23. Weekly topic: 5 Wealth points for those who answer correctly, 2 Wealth points for participation； Question 60 - HCBBS Forum
24. High-temperature high-pressure steam cylinder - HCBBS Forum
25. Daily Question June 3, 2015 (Safe Communication): A reward of 3 wealth points for replies; 3 additional wealth points for correct answers – participation comes with a reward - HCBBS Forum
26. Diameter change before and after the pump - HCBBS Forum
27. The ranking of ripe fruits is out - HCBBS Forum
28. On the empty tower gas velocity of corrugated plate packing towers - HCBBS Forum
29. Introduction to the latest technologies for repairing wear at reducer bearing locations - HCBBS Forum
30. External standard and area normalization - HCBBS Forum
31. Methods to reduce sewage COD as soon as possible - HCBBS Forum
32. How does everyone fill out the risk analysis section on the personnel change application form? - HCBBS Forum
33. What is the impact of downloading all configurations during system operation? - HCBBS Forum
34. 【Daily Question】Principles of Chemical Engineering 074: Fluid Resistance (June 8) - HCBBS Forum
35. Mechanical powder self-locking valve or relief valve - HCBBS Forum
36. Regarding the tool inventory sheet for the repair shop - HCBBS Forum
37. Liquid yellow phosphorus flow monitoring - HCBBS Forum
38. The quality of valve gaskets - HCBBS Forum
39. Selection of variable-frequency drive motor for screw pumps - HCBBS Forum
40. Refrigeration tower diameter change - HCBBS Forum
41. On pipeline vibration analysis - HCBBS Forum
42. It is hot during rescue operations; how to reduce the cooling load of rich gas. - HCBBS Forum
43. Pressure Vessel Product Certificate - HCBBS Forum
44. Hey expert, please teach me what the device parameters mean - HCBBS Forum
45. What are the reasons for low oil pressure in reciprocating compressors? - HCBBS Forum
46. Which marine friend can provide information on **legal occupational diseases** - HCBBS Forum
47. Why are welded steel pipes commonly used for natural gas transmission pipelines in our country - HCBBS Forum
48. What is the failure mode for Hydrogen Stress Corrosion? - HCBBS Forum
49. Jet fuel hydrogenation startup and shutdown plan - HCBBS Forum
50. Which version of FRNC-5PC is everyone using? - HCBBS Forum
51. Hydrorefining of coked naphtha and coked diesel - HCBBS Forum
52. Discussion on the causes of the Jianli shipwreck - HCBBS Forum
53. How many years has Haiyou worked in the field of automated instrumentation? What is your educational background? What is your occupation? - HCBBS Forum
54. Weekly topic: 5 wealth points for those who answer correctly, 2 wealth points for participation； Question 69 - HCBBS Forum
55. One question per day - HCBBS Forum
56. Centrifugal extractor | Extraction tank | Extraction column – three-step extraction method for penicillin - HCBBS Forum
57. Is PTFE sealant the main type of adhesive used for plugging leaks under pressure? - HCBBS Forum
58. Questions regarding rotary joints and mechanical seals - HCBBS Forum
59. Dear teachers, is there any good method for adjusting parameters when refining crude oil? - HCBBS Forum
60. Condition analysis for safety valve calculation - HCBBS Forum
61. 【Serial】The Growth Story of a Chemical Engineering Designer - 37 - HCBBS Forum
62. Sodium hydrosulfide concentration - HCBBS Forum
63. Large-particle urea bag-type dust recovery device - HCBBS Forum
64. What are the process parameters, and which ones are important? - HCBBS Forum
65. Is there a lot of interference from relays? - HCBBS Forum
66. Calcination coke device, tank furnace calcination process, steam specifications generated - HCBBS Forum
67. Today is the college entrance exam. Does it change one’s fate? - HCBBS Forum
68. 【Daily Question】Principles of Chemical Engineering 068: Classification of Pumps (June 2) - HCBBS Forum
69. Looking for CAD drawings of a 4.3-meter coke oven door and door frame; please share them - HCBBS Forum
70. Is the material of insulating iron sheet iron? - HCBBS Forum
71. Valve anti-ejection design - HCBBS Forum
72. Vinyl chloride polymerization EDTA - HCBBS Forum
73. Fluctuations in the control valve of the Siemens positioner - HCBBS Forum
74. What is the purpose of setting the inlet vent valve for Converter 2 in the low water vapor ratio conversion process? - HCBBS Forum
75. The rights have arrived - HCBBS Forum
76. Difference between limit switch contact types: 10A@240VAC and 5A@220VAC - HCBBS Forum
77. 【Daily Question】Wastewater Knowledge-093 (June 6) (2 points for answering, 4 points for a correct answer) - HCBBS Forum
78. I have a question about a case - HCBBS Forum
79. The working principle of the float level gauge - HCBBS Forum
80. Notice on Postponing the 2015 Survey and Design Examination - HCBBS Forum
81. I received a file in DAT format; what software can be used to open it? - HCBBS Forum
82. Weekly topic summary post, since March 2005 (continuously updated) - HCBBS Forum
83. The issue of urea particle cooling in summer! - HCBBS Forum
84. Seeking guidance on the design standards for cofferdams for acidic water tanks - HCBBS Forum
85. Selection of flow meters and control valves - HCBBS Forum
86. Circuit board etching solution - HCBBS Forum
87. Select the appropriate absorber based on the following conditions - HCBBS Forum
88. Can an air compressor be used to compress nitrogen? - HCBBS Forum
89. When has the exam date been postponed this year? Why hasn’t it been announced yet! ! Urgent! Urgent! Urgent! - HCBBS Forum
90. Do wastewater treatment chemical dosing devices have an automatic dosing system? - HCBBS Forum
91. What types of impacts from upstream water flow can easily affect the wastewater treatment plants of petrochemical enterprises? - HCBBS Forum
92. Calculation of flanges for non-standard long-neck equipment - HCBBS Forum
93. Natural gas shutoff butterfly valve - HCBBS Forum
94. There is a nitrile glove factory upstream; when water flows into that factory, the sludge becomes contaminated - HCBBS Forum
95. Dear sea friends, how should we understand this concept of NPSH regarding centrifugal pumps? - HCBBS Forum
96. If I want to see the standards, do I have to buy them? There are so many standards these days; how much will it cost to buy them? - HCBBS Forum
97. Relationship between stripping steam and tower top pressure - HCBBS Forum
98. Low-nitrogen burner for power boilers - HCBBS Forum
99. Reactor design - HCBBS Forum
100. Weekly topic: 5 wealth points for those who answer correctly, 2 wealth points for those who participate； Question 59 - HCBBS Forum