English — Forum #723 (Page 381/642)

1. Sequential start-up of parallel variable-frequency exhaust fans - HCBBS Forum
2. X-ray digital imaging - HCBBS Forum
3. May I ask? - HCBBS Forum
4. Let’s all discuss the operational status of converting coke oven gas into LNG or CNG - HCBBS Forum
5. If high-quality tape is used and the thread is tightened and then turned back a little, will there be leakage? - HCBBS Forum
6. Seeking foreign design standards - HCBBS Forum
7. How to communicate with clients who have requirements - HCBBS Forum
8. Regarding the orientation of the stop valve - HCBBS Forum
9. Issues with the boiler feedwater control valve bypass line - HCBBS Forum
10. 【Daily Topic】【Storage & Transportation Edition 20160113】 - HCBBS Forum
11. Haichuan’s “Season of Gratitude” – To you and me who have been together through the years【Mechanical006】 - HCBBS Forum
12. What is the value of Registered Power 2016? - HCBBS Forum
13. I have a question regarding the feeding method for hydrogenation reactors; I would appreciate it if experts could provide an answer. Thank you! - HCBBS Forum
14. 【Picture of the Day】2016 1.12 Have you seen this device before? - HCBBS Forum
15. Haichuan Gratitude Season – Thanking Our Teachers【Petroleum Area 019】 - HCBBS Forum
16. Seeking some knowledge about catalysts - HCBBS Forum
17. 【Daily Topic】【Engineering Version 20160113】 - HCBBS Forum
18. 【Joint Study*】【Civil Engineering Version 20160115】 - HCBBS Forum
19. Sign-in record post from January 17, 2016 - HCBBS Forum
20. How can sealing be achieved during the unloading process of methanol vehicles? - HCBBS Forum
21. Remove organic matter - HCBBS Forum
22. A general discussion on intermediate professional titles (engineers)? - HCBBS Forum
23. Could you explain the working principle of the deethanizer and the liquefied gas tower? - HCBBS Forum
24. May I ask about the instrument configuration of atmospheric and vacuum distillation units? - HCBBS Forum
25. Axial movement of centrifugal pump shaft - HCBBS Forum
26. 【Daily Question No. 64】January 12, 2016: +2 wealth for participation, +3 wealth for a correct answer - HCBBS Forum
27. Things to note regarding the electrical aspects of belt conveyors and telescopic conveyors - HCBBS Forum
28. 【Daily Question】January 23, 2016: When designing a sieve plate tower, if a certain structural parameter is changed (first 50 replies + 2 points; additional rewards for correct answers...) - HCBBS Forum
29. What type of valves are used for cutting and grinding polycrystalline silicon and monocrystalline silicon? - HCBBS Forum
30. In the alkylation industry, can the vapor phase in the flash tank be cooled by cryogenic methods without the use of a compressor? - HCBBS Forum
31. The impact of national standard specifications for caprolactam on subsequent production - HCBBS Forum
32. I would like to ask fellow sailors: how can the initial boiling point of gasoline be controlled during normal-pressure operations? - HCBBS Forum
33. OCP unit - HCBBS Forum
34. Double-girder bridge crane - HCBBS Forum
35. Environmental Protection Daily Question 1.12: Participate for a prize; 3 correct answers earn an additional 5 as a reward - HCBBS Forum
36. 【Daily Topic】【Storage & Transportation Edition 20160112】 - HCBBS Forum
37. I just got my engineer certificate; I’m not sure if I should keep it with me? - HCBBS Forum
38. Compressor motor heater and space heater - HCBBS Forum
39. 【Daily Topic】【Quality Version 20160114】 - HCBBS Forum
40. Drying of activated carbon - HCBBS Forum
41. Design of the base height of the vacuum distillation tower - HCBBS Forum
42. Question: During pressure test inspections, what is the relationship between the ambient temperature and the temperature of the medium? - HCBBS Forum
43. 【Daily Topic】【Civil Engineering Version 20160117】 - HCBBS Forum
44. Haichuan Thanksgiving Season – Expressing gratitude to friends and mentors along the career path 【Career 010】 - HCBBS Forum
45. Conversion between cubic decimeters and cubic meters - HCBBS Forum
46. Help needed - HCBBS Forum
47. A reward is offered for a paper — assistance with downloading foreign-language literature - HCBBS Forum
48. The process piping is 1/2\" small pipes; how can a 1\" flanged diaphragm pressure gauge be installed? - HCBBS Forum
49. Technical patent holders for coal chemical and petrochemical projects - HCBBS Forum
50. I’ve upgraded to fourth grade! - HCBBS Forum
51. What is the effect of quinoline insolubles on hydrogenation (reaction) catalysts? - HCBBS Forum
52. The use of barium sulfate in PVC and its functions - HCBBS Forum
53. Difference between pressurized and unpressurized in closed-loop systems - HCBBS Forum
54. Reasons for high exhaust temperature of air compressors - HCBBS Forum
55. Is it better to arrange the boiler pipes horizontally or vertically? - HCBBS Forum
56. What are the advantages and disadvantages of installing a central control room in large petrochemical plants? - HCBBS Forum
57. [Petroleum and Chemical Activities] Notice on the Establishment of the “Petroleum and Chemical Publicity Team” - HCBBS Forum
58. Environmental Protection Daily Question 1.21: Participate for prizes; 3 correct answers earn an additional 5 prizes - HCBBS Forum
59. 【Daily Question】1.18 On hydrogen corrosion (3 wealth points for replies; +3 to –8 wealth points for correct answers) - HCBBS Forum
60. 【Daily Question】1.18 Fill-in-the-blank question: What is used to indicate the anti-knock property of automotive gasoline? - HCBBS Forum
61. Help: The gauge reading of the float level meter on site is zero - HCBBS Forum
62. CAESAR II stent elevation - HCBBS Forum
63. 【Daily Topic】【Storage & Transportation Edition 20160115】 - HCBBS Forum
64. 【Joint Study*】【Civil Engineering Version 20160112】 - HCBBS Forum
65. Questions about nitrogen production molecular sieves - HCBBS Forum
66. It is recommended to download the attachment; a one-click option for downloading multiple files is available - HCBBS Forum
67. What are the pressures of low-pressure nitrogen, nitrogen, and high-pressure nitrogen respectively? - HCBBS Forum
68. Sulfur recovery and flue gas treatment in refineries, issues related to catalytic flue gas desulfurization and denitrification - HCBBS Forum
69. What pumps are used for loading liquefied gas and reprocessing? - HCBBS Forum
70. The ethylene oxide solenoid valve cannot shut off automatically - HCBBS Forum
71. How many compression stages are required for a reciprocating compressor with a pressure ratio of 10? - HCBBS Forum
72. The PLC screen of the French expander is locked; the mouse cannot be moved - HCBBS Forum
73. What are the current high-pressure polyethylene projects in the country? - HCBBS Forum
74. What are good ways to deal with biological sludge in heat exchangers? - HCBBS Forum
75. What’s the problem? Stack overflow at line: 0. - HCBBS Forum
76. Discussion on methods to prevent instrument freezing - HCBBS Forum
77. How should middle-aged people take care of their health? - HCBBS Forum
78. Two WeChat conversations with a former classmate who lost his job - HCBBS Forum
79. Regarding the issue of oxygen degreasing - HCBBS Forum
80. It is recommended to add a “preview attachments” feature - HCBBS Forum
81. Pitting corrosion of S30403 - HCBBS Forum
82. 【Weekly Topic】1.18~1.24: How to remove calcium sulfate (automatically +5 wealth for replies; an additional 3-10 wealth for wealth analysis) - HCBBS Forum
83. Consult the manufacturer regarding surfacing issues - HCBBS Forum
84. 【Daily Question】1.18 Multiple-choice question: In a spectrophotometer, its principle is ( ) (New Year’s bonus!) - HCBBS Forum
85. One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 424 - HCBBS Forum
86. How to address the issue of fine sludge generated by sodium sulfide precipitation in copper-nickel wastewater, which tends to pass through filters? - HCBBS Forum
87. 【Daily Question】2016.1.13 Heat exchanger structure selection (first 50 replies + 2 wealth points; additional 3–8 wealth points for correct answers) - HCBBS Forum
88. Does a sulfur-resistant shift catalyst require temperature elevation for reduction? Or direct vulcanization? - HCBBS Forum
89. 【Joint Study*】【HVAC Version 20160120】 - HCBBS Forum
90. Occupational Health Daily Question 1.22: Participate for a prize; 3 correct answers and an additional 5 prizes will be given - HCBBS Forum
91. Individual motor test - HCBBS Forum
92. 【Joint Study*】【HVAC Version 20160122】 - HCBBS Forum
93. Single-acting cylinders are equipped with two-position three-way solenoid valves, while double-acting cylinders are equipped with two-position five-way solenoid valves, right? - HCBBS Forum
94. Haichuan Public Welfare Lottery, Issue 2, 2016-1-22 - HCBBS Forum
95. Regarding liquefied gas LPG/LNG - HCBBS Forum
96. How to remove high levels of nitrogen and phosphorus in domestic wastewater - HCBBS Forum
97. Substances that are soluble in water mix with water - HCBBS Forum
98. How to weld ENiCrMo-3 on the surface of S30408? ? ? - HCBBS Forum
99. Look, the growth process of strawberries - HCBBS Forum
100. What issues should be considered when mixing petroleum coke into coal-fired CFB boilers? - HCBBS Forum