English — Forum #723 (Page 486/642)

1. Replacement issue between PN B series and ASME CLASS series - HCBBS Forum
2. Second draft for public comments on the “Guiding Opinions on Regulating Demonstration Projects for Coal-Based Fuels” - HCBBS Forum
3. What kind of equipment is the YRH-type heat exchanger? - HCBBS Forum
4. There are utility trenches on the road, and steel covers need to be placed over them. How should the load requirements be determined? - HCBBS Forum
5. New technologies for cold-rolled sheets and strips and coated layers - HCBBS Forum
6. Issues regarding the vent pipe behind the safety valve - HCBBS Forum
7. What is the difference between slime and dirt? - HCBBS Forum
8. How to remove the piston rod and crosshead connector of a reciprocating compressor? - HCBBS Forum
9. For acidic water, a single-column stripping process is used; what is the ammonia nitrogen content in the acidic gas extracted from the top of the column? - HCBBS Forum
10. How is the slope of a drainage ditch (open channel) determined? - HCBBS Forum
11. Regarding the pH value of demineralized water - HCBBS Forum
12. How to repair local deformation in tower equipment? - HCBBS Forum
13. Effect of initiator in recycled VCM on dispersant - HCBBS Forum
14. Environmental Protection Daily Quiz: October 16 – Participate for prizes; 3 correct answers and you’ll get another 3 as a bonus - HCBBS Forum
15. Can a centrifugal pump be used for 100-degree wastewater? - HCBBS Forum
16. Selection of steam flow meters - HCBBS Forum
17. 【Daily Question】Question from the 20151019 issue - HCBBS Forum
18. Environmental Protection Daily Quiz 10.21: Enter to win prizes; 3 correct answers earn an additional prize of 2 - HCBBS Forum
19. Effect of density change after gas switching for pulverized coal gasification and pulverized coal transport - HCBBS Forum
20. How to choose the diameter of a basket filter based on flow rate - HCBBS Forum
21. What specific occupations do the friends in the environmental protection section have? - HCBBS Forum
22. 【Daily Question】Chemical Engineering Principles 213: Insulation Materials (October 25) - HCBBS Forum
23. Sampling of the components in nitrogen and hydrogen pipelines is required; what kind of sampler should be used, with a maximum pressure of 1 MPa, and it is also desired to be able to use it at atmospheric pressure... - HCBBS Forum
24. Issues related to the utilization of flue gas desulfurization by-products - HCBBS Forum
25. Huangtai circulating fluidized bed gasifier - HCBBS Forum
26. Calculation of external pressure on copper tubes in fixed-tube-sheet copper tube heat exchangers - HCBBS Forum
27. How to treat methanol wastewater at 8000 ppm? - HCBBS Forum
28. I don’t know how to read the parameters of flow orifice plates; please help - HCBBS Forum
29. I have been working in equipment procurement for over 4 years and now feel I’ve hit a bottleneck; I don’t know what to do next - HCBBS Forum
30. In the D-type connection between the tube sheet and the shell as well as the tube bank, how are the flange thickness δf'' and width bf determined? - HCBBS Forum
31. Rat control in the control room - HCBBS Forum
32. It’s not academic grades that determine a child’s life; well written! - HCBBS Forum
33. Dear friends, please give your opinions – how should we understand what is meant by \"detailed drawings\"? - HCBBS Forum
34. Are there any recommended manufacturers of heat pipe exchangers? - HCBBS Forum
35. What is the impact of excessive changes in the vapor and liquid phase loads in a tower on its operation? How does the phenomenon of tower flooding occur? - HCBBS Forum
36. 【Daily Question】Question from Issue 20151022 - HCBBS Forum
37. 【Daily Question No. 40】October 26, 2015: +2 wealth for participation, +3 to +8 wealth for correct answers - HCBBS Forum
38. Why are there fewer side products from the tower and are they darker in color? Is it an internal issue with the tower or due to the reflux flow? - HCBBS Forum
39. Xiaobai wants to know how to analyze this logic - HCBBS Forum
40. 【Daily Question】Question from Issue 20151020 - HCBBS Forum
41. Tank rust removal and anti-corrosion treatment - HCBBS Forum
42. 【Daily Question】Chemical Engineering Principles 204: Baffles (October 16) - HCBBS Forum
43. Profits from downstream products of propylene - HCBBS Forum
44. Coiled tube heat exchanger - HCBBS Forum
45. Butene recovery compressor - HCBBS Forum
46. Which is better, a breathing manhole or an emergency vent manhole cover? - HCBBS Forum
47. Difference between zinc-rich epoxy resin and epoxy zinc-rich paint - HCBBS Forum
48. 【Daily Question】10.25 Short Answer Question: The necessary conditions for a distillation process are - HCBBS Forum
49. Why is the pressure in the hydrogen pipeline 4 Kpa higher than that in the chlorine pipeline? - HCBBS Forum
50. Monopolies remain intact; what good does deregulating refined oil prices do? - HCBBS Forum
51. [Cracking Question Bank] What are the parameters that affect hydrocarbon cracking, and how do they influence it? - HCBBS Forum
52. Retraction size of the central oxygen nozzle in the GE coal-water slurry gasification process burner - HCBBS Forum
53. 【Daily Question】Question from Issue 20151020 - HCBBS Forum
54. Guidelines for the Standardized Management of Industrial Hazardous Waste Generating Units--6 - HCBBS Forum
55. I would like to ask what is done with methanol exhaust gas in your area? - HCBBS Forum
56. The PSA oxygen-generation molecular sieve always turns into powder within half a year; I’m looking for a molecular sieve that can be used reliably - HCBBS Forum
57. Investment in building an electrolytic copper plant - HCBBS Forum
58. Regarding the issue of phosphorus removal - HCBBS Forum
59. I’m a beginner and eager to get everyone’s help. Thank you all! - HCBBS Forum
60. 【Daily Question No. 11】October 26, 2015: +2 wealth for participation, +3 wealth for a correct answer - HCBBS Forum
61. 【Daily Question】October 22, 2015: Steel materials (2 wealth points for a reply; +3 to +8 wealth points if the answer is correct) - HCBBS Forum
62. Question: Can material 2507 withstand 1% dilute sulfuric acid at a temperature of @100 degrees? Thank you! - HCBBS Forum
63. Why isn’t there a section on waste heat power generation technology in the forum? - HCBBS Forum
64. What type of heat exchanger is suitable for heat exchange between air and air at low temperatures (-143°C)? - HCBBS Forum
65. 【Daily Question】Question 22: Test question from issue 20151019 (Reply +2)； For the other +3) - HCBBS Forum
66. Can stainless steel and composite steel plates (carbon steel/stainless steel) be heat-treated? - HCBBS Forum
67. Is it necessary to purge the catalyst bed? - HCBBS Forum
68. Slurry circulation - HCBBS Forum
69. 【Daily Question No. 7】October 20, 2015: +2 wealth for participation, +3 wealth for a correct answer - HCBBS Forum
70. Is there a simple way to distinguish between new and used material in blank castings made of nickel-based alloys based on their appearance? - HCBBS Forum
71. Bolt design - HCBBS Forum
72. Guidelines for the Standardized Management of Industrial Hazardous Waste Generating Units--9 - HCBBS Forum
73. Is the sludge very fine and does not flocculate? - HCBBS Forum
74. How many structural types are there for the liquid distribution devices in packed towers? - HCBBS Forum
75. Which sea friend can provide the contact information of the manufacturers of vinyl chloride dehydration aggregators, as well as information on their performance? - HCBBS Forum
76. What are the hazards of dust to the human body? - HCBBS Forum
77. What is a motor protector? Which standard specifies the relevant requirements? - HCBBS Forum
78. 【Recycling, Sewage】Vote for the Best Member of October to win cash prizes - HCBBS Forum
79. In the Luoyang area, one district manager is needed - HCBBS Forum
80. Urgently seeking piping engineers or workshop layout engineers - HCBBS Forum
81. Must a flame arrester be installed on combustible gas pipelines? - HCBBS Forum
82. Job hunting - HCBBS Forum
83. Seek the price trend of stainless steel seamless tubes and nickel products from 2013 to the present - HCBBS Forum
84. What should be noted when installing a remote transducer rotor pump flow meter? - HCBBS Forum
85. Cl2 is dried using concentrated sulfuric acid; why can’t H2 be dried the same way? - HCBBS Forum
86. What material should be used to fill the gap between buried gasoline pipelines and sleeves? - HCBBS Forum
87. Briefly describe the installation method of the liquid receiving tray for tower equipment? - HCBBS Forum
88. Gas heat exchanger - HCBBS Forum
89. Seeking advice on career development for recent graduates - HCBBS Forum
90. What level of sulfur content in ammonia-vaporized wastewater is considered excessive, measured in milligrams per liter? - HCBBS Forum
91. Question: Is it possible to use 304 stainless steel as a container for a 20% urea solution? - HCBBS Forum
92. Continuous catalyst regeneration - HCBBS Forum
93. Calculation of resistance in wire mesh demisters - HCBBS Forum
94. What are the causes of leaks in the hoses of liquid ammonia pump accumulators? - HCBBS Forum
95. Pump purging issue - HCBBS Forum
96. 【Daily Question】Question 25: Test question from issue 20151022 (Repeat +2)； For the other +3) - HCBBS Forum
97. How does the heat conduction rate change as the thickness of the insulation material increases? - HCBBS Forum
98. Briefly describe the tasks and objectives of environmental quality assessment. - HCBBS Forum
99. The catalyst loading ratio for reprocessing the four reactors is ( ) - HCBBS Forum
100. Briefly describe the structural features of metal hollow O-ring seals? - HCBBS Forum