English — Forum #337 (Page 100/163)

1. 1.25Cr-0.5Mo material - HCBBS Forum
2. Can electric heating be added to the hydrogen pipeline? - HCBBS Forum
3. Relationship between pipeline pressure class and design pressure - HCBBS Forum
4. Calculation of energy consumption for 85℃ hot water - HCBBS Forum
5. Fundamentals of Processing Technology (Multiple Choice) 20181122 - HCBBS Forum
6. Is the cooling effect of circulating water for hydrogen the same as that for nitrogen? - HCBBS Forum
7. Pressure issues with the pumps in closed-loop systems! - HCBBS Forum
8. Why can’t I send the picture? - HCBBS Forum
9. Determine whether the following substances can be separated by azeotropic distillation - HCBBS Forum
10. Establishment of the vacuum system for the condensing steam turbine - HCBBS Forum
11. Issues related to burying ethylene oxide storage tanks - HCBBS Forum
12. Basic Process Knowledge (Multiple Choice) 20180814 - HCBBS Forum
13. By-product of iron red; seeking information on its source - HCBBS Forum
14. Don’t the external dimensions of the equipment need to be indicated on the equipment layout diagram? Just the positioning dimensions? - HCBBS Forum
15. How to set the negative pressure protection for the device - HCBBS Forum
16. Selection of plain porcelain filters and mesh size - HCBBS Forum
17. In petrochemical fire protection codes, how are the upwind and downwind directions determined? - HCBBS Forum
18. Issues with the small dikes and drainage ditches surrounding the units (frames) of chemical plants - HCBBS Forum
19. What are the standards for PTFE pipes and fittings? ? ? - HCBBS Forum
20. To gasify coal gas, is steam or heat transfer oil better? The temperatures of both steam and heat transfer oil are limited to 135 degrees - HCBBS Forum
21. Vibration issue in the vacuum pump outlet main pipe - HCBBS Forum
22. Some questions regarding safety valves - HCBBS Forum
23. Is there a problem with the installation of the accident pool? - HCBBS Forum
24. The boiling point of dichloroethane in exhaust gases is relatively low; it needs to be removed through adsorption. What should be done, given that adsorption cannot take place at high temperatures? - HCBBS Forum
25. Who is the design pressure and design temperature actually meant for? What is it used for? - HCBBS Forum
26. Can steam condensate be discharged directly? - HCBBS Forum
27. How is it to absorb acetic acid with NaOH? ! - HCBBS Forum
28. I would like to ask everyone: when calculating safety valves, should liquid chlorine be treated as a liquefied gas? - HCBBS Forum
29. Regarding the calculation of fuel calorific value - HCBBS Forum
30. What counts as a torch containing flammable liquids - HCBBS Forum
31. Can two units be combined to form one unit? Please give the reason, thank you! A generous reward will be given for an accurate answer! - HCBBS Forum
32. What happens if there is sudden air leakage in the valve of the liquid phase? Can the valve still function properly under the same temperature and pressure conditions? - HCBBS Forum
33. DCS - HCBBS Forum
34. Where should the three-valve assembly for the process pipelines of the inlet and outlet devices be installed? - HCBBS Forum
35. Reasons for the damage of pressure vessels - HCBBS Forum
36. The complete design process for a chemical engineering design project - HCBBS Forum
37. Pipe pressure drop - HCBBS Forum
38. How can the remaining liquid inside the equipment be completely drained if there is no low-point discharge valve at the bottom of the equipment? - HCBBS Forum
39. Under what circumstances is it necessary to equip a pump with variable frequency control? - HCBBS Forum
40. [Mechanical Equipment Technology Edition] Daily Question 20180706: Refrigeration Systems — Refrigeration Parameters (16) - HCBBS Forum
41. Is it not appropriate to use circulating water to cool gases, given that gases have a relatively low specific heat? - HCBBS Forum
42. How is the exhaust gas from hydrogenation reactions in fine chemical manufacturing monitored? - HCBBS Forum
43. PTFE anti-drip agent production process - HCBBS Forum
44. Our company’s ion liquid desulfurization performance metrics - HCBBS Forum
45. May I ask, does it mean that for steel-lined plastic pipes, one can first install the carbon steel pipe and then insert a layer of plastic pipe inside it? - HCBBS Forum
46. Basic Process Knowledge (Multiple Choice) 20180927 - HCBBS Forum
47. Fundamentals of Manufacturing Processes (Multiple Choice) 20181109 - HCBBS Forum
48. How is a flexible metal hose represented in PID? Get a legend - HCBBS Forum
49. Numbering sequence - HCBBS Forum
50. What is the flow rate for an air compressor with parameters of 0.8 m3/min and P=0.7 MPa? ? Urgent urgent urgent - HCBBS Forum
51. How should the heat of vaporization of a mixed gas be calculated - HCBBS Forum
52. Basic Process Knowledge (Multiple Choice) 20181022 - HCBBS Forum
53. 【Daily Question】【Static Equipment – AC Version... Question 4】November 16, 2018. Multiple-choice question.. Entry for a prize - HCBBS Forum
54. Regarding the treatment of reboiler steam condensate - HCBBS Forum
55. If a flammable liquid is introduced into the reaction vessel inside the factory building for reaction, should such a factory building be classified as Category A? - HCBBS Forum
56. Building code: 3.6.9 – The sub-control room can be located adjacent to Class A and B factories; but does that mean the sub-control room itself needs to be explosion-proof? - HCBBS Forum
57. Discharge volume under fire conditions of the breather valve of a methanol storage tank (atmospheric pressure tank) - HCBBS Forum
58. Basic Process Knowledge (Multiple Choice) 20180817 - HCBBS Forum
59. What is the difference between soft start and variable frequency start? Are the results of the action all the same? - HCBBS Forum
60. Vocational skills training tutorial for team leader positions@ - HCBBS Forum
61. Can an emergency shut-off valve not replace remote control for operating valves? - HCBBS Forum
62. R22 direct-cooling evaporator - HCBBS Forum
63. Problem with cooling of the reaction vessel – urgent (risk of cooling water entering the heating coil at 280°C) - HCBBS Forum
64. Feasibility study stage: building area - HCBBS Forum
65. Which is the best for calculating pressure drops in tees and elbows in hydraulic calculations? - HCBBS Forum
66. Dry-to-wet conversion of process gases - HCBBS Forum
67. Process parameters related to sulfuric acid evaporation - HCBBS Forum
68. Fundamentals of Manufacturing Processes (Multiple Choice) 20181019 - HCBBS Forum
69. Fundamentals of Manufacturing Processes (Multiple Choice) 20181117 - HCBBS Forum
70. I would like to ask: for equipment such as pumps and heat exchangers, which haven’t been ordered yet, but for which civil engineering requirements still need to be specified, how do you go about doing that? - HCBBS Forum
71. Chemical Engineering, Senior Engineer – Written Exam Outline - HCBBS Forum
72. Fundamentals of Manufacturing Processes (Multiple Choice) 20180822 - HCBBS Forum
73. Fundamentals of Manufacturing Processes (Multiple Choice) 20180713 - HCBBS Forum
74. Fire separation distance between the power distribution room and Class A factories - HCBBS Forum
75. What is the safe temperature for unloading materials with an open outlet? - HCBBS Forum
76. Basic Process Knowledge (Multiple Choice) 20180727 - HCBBS Forum
77. Calculation of inflation time for vacuum equipment - HCBBS Forum
78. How to calculate a coiled tube heat exchanger? - HCBBS Forum
79. Inspection status of the heat-traced small pipelines - HCBBS Forum
80. The readings of the dual-display mechanical meter and the liquid crystal meter of the gas turbine flowmeter are inconsistent. - HCBBS Forum
81. Which category does the trichloroethylene storage tank belong to? - HCBBS Forum
82. Questions about the oxidation process in high-risk processes? ? - HCBBS Forum
83. How should these two notes about jogging be understood? - HCBBS Forum
84. Why is there a large amount of free water at the end of the air purification duct network? - HCBBS Forum
85. How should I understand the pressure before and after the control valve in the data table? - HCBBS Forum
86. Selection of flexible hoses - HCBBS Forum
87. Pressure dew point and atmospheric conversion table - HCBBS Forum
88. I need help from experts: how should the DCS and SIS systems be depicted in a process flow diagram? - HCBBS Forum
89. The superheated steam at 1.0 MPa and 230°C was cooled and depressurized to become saturated steam at 0.5 MPa and 165°C - HCBBS Forum
90. A batch of nitrogen cylinders is planned to be installed in the natural gas heat transfer oil furnace room; what are the layout requirements? - HCBBS Forum
91. Emergency relief tank - HCBBS Forum
92. Color of butyllithium reaction - HCBBS Forum
93. When steam or gas is depressurized or released into a large open space, its temperature must drop, right? - HCBBS Forum
94. Why is 8.5% hydrogen peroxide considered a safe concentration? Is hydrogen peroxide at this concentration still considered category A? - HCBBS Forum
95. HYSYS issues - HCBBS Forum
96. htri is used to calculate heat exchanger vibration - HCBBS Forum
97. Hydrogen peroxide is used on site, and I plan to purchase barrels of it; the daily usage is only 500 KG. Are there any fire separation requirements that need to be met in this case? - HCBBS Forum
98. Configuration of static mixers – Gas and slurry mixing issue - HCBBS Forum
99. Analysis of gas flow resistance - HCBBS Forum
100. Recycling of dilute sulfuric acid waste acid - HCBBS Forum