English — Forum #337 (Page 38/163)

1. Selection of American standard welding materials - HCBBS Forum
2. Regarding the issue of preventing oil from reaching the oxygen valve - HCBBS Forum
3. May I ask whether a company with Class B environmental protection qualifications is qualified to issue documents and drawings for the distillation of methanol from methanol and water? - HCBBS Forum
4. The role of NMP in pesticide production - HCBBS Forum
5. Can a vertical graphite condenser be used to condense gases? How are the gas inlets and outlets connected? How does the condensate water come in and go out? - HCBBS Forum
6. The stirrer in the reactor won’t move - HCBBS Forum
7. Construction of catalyst workshop - HCBBS Forum
8. Aromatic distillation process flow (five-column process) - HCBBS Forum
9. For high-temperature, high-pressure reactors with intermittent discharge, where the material tends to polymerize and crystallize, how should the discharge system be designed to prevent blockages? - HCBBS Forum
10. What is the best method for filtering or removing oil from wastewater containing oily tar? - HCBBS Forum
11. Bromine index, unsaturated hydrocarbons, and benzene ring structure - HCBBS Forum
12. Could experts in distillation please analyze and give some advice? - HCBBS Forum
13. CAD drafting A1 A2 - HCBBS Forum
14. Are there any people with experience in A2O operation who have encountered issues with excessive ammonia nitrogen levels? - HCBBS Forum
15. Seeking advice - HCBBS Forum
16. How should pressure be released after steam is introduced into the tower? Open the valve directly to relieve pressure? - HCBBS Forum
17. Clamp point problem - HCBBS Forum
18. What is the thickness of the PTFE lining in equipment with PTFE lining? What standards should be followed? - HCBBS Forum
19. Issues regarding the gas velocity in air lift circulation - HCBBS Forum
20. Summary of Process Standards [Water Supply and Drainage Standard Specifications] List (no attachments) - HCBBS Forum
21. How to calculate the straight pipe section between two 45-degree elbows - HCBBS Forum
22. We have an overflow tank here, and the liquid level is always low - HCBBS Forum
23. For the long-distance transport of flue gas, is it better to place the transfer fan near or far? - HCBBS Forum
24. Is it necessary to install a vent valve on the hydrochloric acid storage tank to prevent evaporation? How are your hydrochloric acid storage tanks designed? - HCBBS Forum
25. Can the support channel steel in the mixed-bed be welded to the tank body? - HCBBS Forum
26. What standard does the water filling experiment for atmospheric pressure storage tanks follow? - HCBBS Forum
27. Is there any distance requirement between the methanol storage tank’s fire dike and the multi-story framework of the methanol distillation tower? - HCBBS Forum
28. Chemical process diagram - HCBBS Forum
29. Nitric acid concentration technology and equipment - HCBBS Forum
30. Seeking help regarding the sealed ventilation of the liquid light tank - HCBBS Forum
31. 【Haichuan Equipment Guessing Game】What device is this? - HCBBS Forum
32. The glass plate level gauge and double-flange level gauge in the atmospheric pressure stripping tower are inaccurate - HCBBS Forum
33. How to remove acid radicals from organic solvents - HCBBS Forum
34. Can the yield of chemicals produced directly from crude oil reach up to 80%? What other new technologies are there besides ExxonMobil? - HCBBS Forum
35. Sulfur production furnace - HCBBS Forum
36. Cobalt sulfate solution to remove cadmium ions - HCBBS Forum
37. The yellowing problem of 2-cyanopyridine - HCBBS Forum
38. Leakage in the regenerator of 7-meter coke ovens (1) - HCBBS Forum
39. Demarcation of vacuum tubes - HCBBS Forum
40. If the mechanical calculations are satisfactory, can one disregard the codes? - HCBBS Forum
41. What are the reasons for the strong odor in the chloroacetic acid dissolution tank? - HCBBS Forum
42. Manual for the Design Selection of Petrochemical Equipment – Selection of Pumps - HCBBS Forum
43. For storage tanks of categories A and B with the same volume, is it better to have a larger height-to-diameter ratio or a smaller one? - HCBBS Forum
44. Why, for saturated steam, as the pressure increases and the temperature rises, does the enthalpy value decrease? - HCBBS Forum
45. Urgent! Urgent! Urgent! ! ! How should Note 2 in Table 3.4.1 of the building code be understood? - HCBBS Forum
46. Hydrogenated silicone oil - HCBBS Forum
47. Summary of the dibutylene glycol project - HCBBS Forum
48. Demand Analysis of Downstream Application Areas in China’s Formaldehyde Industry - HCBBS Forum
49. I was wondering, do people usually search for and download American patents often? - HCBBS Forum
50. Natural gas: relationship between pressure and flow rate - HCBBS Forum
51. Coal Chemical Engineering Technology, edited by Guo Shucai - HCBBS Forum
52. Request the legend for the axial flow pump - HCBBS Forum
53. Regarding the transportation of gas cylinders - HCBBS Forum
54. Hydrogen at 3 MPa is reduced in pressure using a control valve to 0.7 MPa for use; how should the discharge capacity of the safety valve downstream of the control valve be calculated? - HCBBS Forum
55. Dear managers, I have a question: regarding the liquid level and pressure balance in the fractionation tower during water-cooled transportation, the feed rate is shown as 20 t/h while the output rate is shown as 29 t/h. With a material balance discrepancy of 9 t, is this normal? They are all orifice plate flow meters - HCBBS Forum
56. Gas-liquid mixer - HCBBS Forum
57. Acrylonitrile plant - HCBBS Forum
58. Centrifuge - HCBBS Forum
59. 4Q Plan - HCBBS Forum
60. The CO2 level in the gas purified by low-temperature methanol washing cannot be reduced - HCBBS Forum
61. Sharing of engineering and process books and standard documents - HCBBS Forum
62. Laboratory acceptance and commissioning inspection - HCBBS Forum
63. Manufacturers of wear-resistant ash transfer elbows discuss the causes of wear in wear-resistant pipes - HCBBS Forum
64. Why is the diameter enlarged after the steam trap? - HCBBS Forum
65. I’m seeking help from experts regarding the calculation of bolt tension and shear force in wall-mounted tripods - HCBBS Forum
66. What does the diagram in HG/T20505-2014 represent? - HCBBS Forum
67. Timing of the leak test - HCBBS Forum
68. How to install a magnetic flap level gauge - HCBBS Forum
69. Regarding the issue of vaporization due to heating in glass panels during winter? - HCBBS Forum
70. Process Design for Fuel Ethanol (Molecular Sieve Adsorption Dehydration) - HCBBS Forum
71. System pressure test after shutdown and major maintenance - HCBBS Forum
72. Guys, I need help with the issue of theoretical unit consumption - HCBBS Forum
73. Does the volume change after methanol dissolves tar? How much has it changed? - HCBBS Forum
74. What aspects need to be examined during pipeline inspection, and are there any standards or specifications? Thank you - HCBBS Forum
75. Compressor surge occurs when either the volumetric flow rate is low or the mass flow rate is low. - HCBBS Forum
76. Tank farm water injection system - HCBBS Forum
77. What are the advantages and disadvantages of various methods for producing OBD? - HCBBS Forum
78. Coking gasoline as a catalytic terminator - HCBBS Forum
79. Looking for a book - HCBBS Forum
80. Layout issues for fine chemical projects - HCBBS Forum
81. Seek help regarding the gas release rate from the cylinder - HCBBS Forum
82. Vibration problem of the smoke extractor - HCBBS Forum
83. The issue of the proportion of costs associated with the maintenance of chemical processing equipment - HCBBS Forum
84. What are the reasons for the frequent tripping of high-pressure fans and how to resolve it? - HCBBS Forum
85. Is this reaction a hazardous process? - HCBBS Forum
86. Rums PDH Operating Procedures - HCBBS Forum
87. Difference between Fire Hazard Class A2 and Class A4 - HCBBS Forum
88. What are the effects if the inlet temperature of a centrifugal compressor increases? - HCBBS Forum
89. Illustrated Diagram of Fine Chemical Production Process, Part 2 - HCBBS Forum
90. Does the hydrogen produced as a by-product in the styrene plant contain sulfur and methane impurities? - HCBBS Forum
91. Sulfur recovery, hydrogen pre-sulfidation, and activation of oxidation reactions - HCBBS Forum
92. Diffusion agent finder - HCBBS Forum
93. Direct dehydrogenation of ethanol to acetaldehyde - HCBBS Forum
94. Heat Transfer, 5th Edition, by Tao Wenquan - HCBBS Forum
95. The impact of gas components on screw compressors - HCBBS Forum
96. What kind of insulation should be used to insulate a tank with a steel lining and PTFE coating? - HCBBS Forum
97. Urgent need, seeking help - HCBBS Forum
98. The designed pressure for the water pressure is 0.6 MPa, but saturated steam with a pressure of 0.1–0.3 MPa needs to be introduced. Does this require classification as a pressure vessel? - HCBBS Forum
99. Are flexible connections installed at the inlet and outlet of the screw pump? - HCBBS Forum
100. When should the three-stage oil and gas recovery equipment be turned on? - HCBBS Forum