English — Forum #337 (Page 74/163)

1. In food processing, how long is steam sterilization typically carried out before starting up the process, and what pressure of steam is used? - HCBBS Forum
2. What is the signing level required for the professional requirements related to pipeline materials in process engineering? - HCBBS Forum
3. Calculation of the diameter of the process water tank - HCBBS Forum
4. Why are the temperatures of the outlet head and the pipelines of the shell-and-tube heat exchanger different? - HCBBS Forum
5. Is it necessary to use a metal gasket between the nut of high-voltage equipment and the equipment itself? - HCBBS Forum
6. Should methanol wastewater with a concentration of around 30%–50% be classified according to fire hazard categories? ? ? - HCBBS Forum
7. 【Haichuan School Review Series Discussion】Job Responsibilities of Designers in Design Institutes - HCBBS Forum
8. [Daily Question] Basic Process Knowledge (True/False) 20190607 - HCBBS Forum
9. Is the thermal tightening of catalytic hydrogenation units carried out in a hydrogen environment or a nitrogen environment? - HCBBS Forum
10. How is the pipe material grade determined? - HCBBS Forum
11. 【HaiChuan Explores the World】Ancient Chinese drainage systems - HCBBS Forum
12. carbon disulfide - HCBBS Forum
13. How to operate and switch the circulating argon pump in the air separation process flow - HCBBS Forum
14. Oil and gas projects and chemical projects - HCBBS Forum
15. Steam flow rate - HCBBS Forum
16. 【Process Engineering Division - Pipeline and Valve Technology Exchange Forum - Daily Question - Questions 05-17】 - HCBBS Forum
17. Issues regarding the clay treatment unit in the ethylbenzene dehydrogenation to styrene plant - HCBBS Forum
18. Any experience with alternating steam and circulating water in the jacket/internal coil of a reactor? How can the water inside be removed effectively? - HCBBS Forum
19. What is the purpose of nitrogen purging for the rotating discharge valve in the silo? - HCBBS Forum
20. Is ammonia considered a highly hazardous substance? - HCBBS Forum
21. A gas pipeline leads to a device containing a solution; is a check valve needed at the connection point to the device? - HCBBS Forum
22. PFD diagram for vinyl acetate process design - HCBBS Forum
23. Newbie in the manufacturing field here. What are the uses of caustic soda flakes and liquid caustic soda in industrial production? - HCBBS Forum
24. Can organic solvents such as methanol, ethanol, acetonitrile, toluene, and xylene be used with PP or PE materials? - HCBBS Forum
25. Siphon pipe flow interruption - HCBBS Forum
26. 【Process Engineering Division – Pipeline and Valve Technology Exchange Forum – Daily Question – Questions 05-09】 - HCBBS Forum
27. Problems encountered in ammonia nitrogen testing - HCBBS Forum
28. It’s terrifying! - HCBBS Forum
29. Seeking process documentation for blood products, monoclonal antibodies, and cell culture production; willing to pay a high price to acquire it - HCBBS Forum
30. [Daily Question] Basic Process Knowledge (True/False) 20190807 - HCBBS Forum
31. Problems of refractory material manufacturers - HCBBS Forum
32. Some issues with seismic pressure gauges? - HCBBS Forum
33. [Daily Question] Basic Process Knowledge (Multiple Choice) 20190925 - HCBBS Forum
34. Tire pyrolysis - HCBBS Forum
35. COD determination - HCBBS Forum
36. A chemical technician is needed - HCBBS Forum
37. Can the water in the water seal tank be replaced with an MDEA solution? - HCBBS Forum
38. Which material used in steel-lined plastic systems can resist solvents such as methanol and toluene? Has it been used? - HCBBS Forum
39. Without further ado, the link to Perry’s Chemical Engineering Handbook (9th edition) - HCBBS Forum
40. [Daily Question] Basic Process Knowledge (True/False) 20190513 - HCBBS Forum
41. [Daily Question] Basic Process Knowledge (Multiple Choice) 20191022 - HCBBS Forum
42. Some knowledge about valves (I) - HCBBS Forum
43. Liquid oxygen production by cryogenic method - HCBBS Forum
44. Where should a beginner start learning ASPEN? It’s self-study; is training required? - HCBBS Forum
45. 【Haichuan School Review Series Discussion】Job Responsibilities of Reviewers in Design Institutes - HCBBS Forum
46. Why are some flow control loops FIC positive and others negative? - HCBBS Forum
47. Buried pipe pressure testing - HCBBS Forum
48. 0.4, 6.8 Nitrogen pipeline purging issues. - HCBBS Forum
49. Solving Difficulties in Polyurethane Spraying - HCBBS Forum
50. Density of high-temperature oil and gas - HCBBS Forum
51. How to manage a 20% sodium chlorite solution - HCBBS Forum
52. Distance from the filling station to the liquid nitrogen tank - HCBBS Forum
53. Acidic water stripping - HCBBS Forum
54. What are the prospects for those working in the thermal engineering field at listed petrochemical design institutes? Is it possible to change the process? - HCBBS Forum
55. Heat exchanger BEM800-0.5/0.6-161-3500/19-1 - HCBBS Forum
56. Hot water storage tank - HCBBS Forum
57. Can the diameter of the same pipeline number in the process package be changed? - HCBBS Forum
58. I would like to know how many small sewage treatment units are needed in a factory; since there are no buildings or tanks, what procedures are required, and is a construction permit necessary? - HCBBS Forum
59. Does that instructor have test questions on calculating the hydrogen-to-oil ratio? - HCBBS Forum
60. What is cold transport and hot transport? - HCBBS Forum
61. Recycling of precious metals in catalysts - HCBBS Forum
62. When gas and liquid are mixed in a static mixer, is there any difference between the two outlets? Which one is for the liquid and which one for the gas? - HCBBS Forum
63. May button boxes or individual distribution cabinets be installed in Type A and Type B rooms? - HCBBS Forum
64. Excuse me, for small fans that are explosion-proof and made of aluminum, what brand is better? - HCBBS Forum
65. [Daily Question] Basic Process Knowledge (True/False Questions) 20190815 - HCBBS Forum
66. Delete - HCBBS Forum
67. Is a flame arrester required for the liquefied gas loading arm? - HCBBS Forum
68. Regarding the setup of the inlet main pipe for the two operating and one standby water pumps - HCBBS Forum
69. How to extract sodium bicarbonate from wastewater containing about 3% sodium bicarbonate - HCBBS Forum
70. Where does the regulation state that a backup tank must be installed for liquid ammonia storage tanks? - HCBBS Forum
71. Can the cabinet room be located in an explosion-proof area? ? - HCBBS Forum
72. What are the requirements for oil temperature in the control oil of centrifugal compressors? - HCBBS Forum
73. What does this symbol mean in the P&ID? - HCBBS Forum
74. Who has the operating procedures for ammonia synthesis at Hunan Anchun? - HCBBS Forum
75. Filling with a mixture of carbon dioxide and argon gas - HCBBS Forum
76. 350CMH, 50Pa, what type of fan should be used? ! - HCBBS Forum
77. Application of track ball valves in propane dehydrogenation units - HCBBS Forum
78. On-site control cabinet, explosion-proof electrical cabinet - HCBBS Forum
79. Flanges come in PN series and CLASS series – what is the difference? How to convert - HCBBS Forum
80. Seeking methods for removing ammonia nitrogen from wastewater with high ammonia nitrogen and high salt content - HCBBS Forum
81. [Daily Question] Basic Process Knowledge (True/False Questions) 20190616 - HCBBS Forum
82. Why can’t the density of a sodium hydroxide solution be calculated using the superposition method? - HCBBS Forum
83. Ethylene and propylene liquids are safely discharged into the cooling tank. The flash point of ethylene is lower than that of propylene; if a check valve is installed at the junction of the propylene discharge pipe and the collection pipe to prevent ethylene vapor at low temperature from flowing back into the propylene pipeline, will this have any impact on the propylene discharge? - HCBBS Forum
84. Problem of excessively long outlet pipe in centrifugal pumps - HCBBS Forum
85. Request Aspen simulation for the gas-phase synthesis of vinyl acetate from acetylene - HCBBS Forum
86. How is hygiene managed in power plants? - HCBBS Forum
87. Can the power distribution room and the automatic control room be built adjacent to each other? If possible, does the adjacent wall need a firewall? - HCBBS Forum
88. What software is used to draw perspective views of pipes - HCBBS Forum
89. Zhejiang Tongkun Holding Group and Shanghai Baosteel Gas Company’s annual production of 1.2 million tons of ethylene glycol - HCBBS Forum
90. RDS residue hydrogenation - HCBBS Forum
91. I need help figuring out what p-xylene is used to produce or synthesize in the fields of pesticides and pharmaceuticals - HCBBS Forum
92. I would like to ask experts about the extraction of bromine using hydrobromic acid and hydrogen peroxide - HCBBS Forum
93. Does anyone know how much a set of low-temperature plasma waste gas treatment equipment costs? A small scale will do - HCBBS Forum
94. Can a 5% hydrofluoric acid aqueous solution be transported using PVC-C piping and fittings? - HCBBS Forum
95. The new type of silico-calcium offers many advantages over traditional silico-calcium; it is the preferred choice for casting and steelmaking! - HCBBS Forum
96. What does a 10-ton boiler mean in the context of waste heat utilization? - HCBBS Forum
97. What plastic materials can withstand methanol pipelines and containers at 50°C? - HCBBS Forum
98. [Daily Question] Basic Process Knowledge (True/False) 20190511 - HCBBS Forum
99. [Daily Question] Basic Process Knowledge (True/False Questions) 20190629 - HCBBS Forum
100. Thiazophos production process - HCBBS Forum