English — Forum #337 (Page 26/163)

1. May I ask how double-acting and single-acting pneumatic valves are represented in a PID diagram? - HCBBS Forum
2. Can a flame arrester be placed downstream of the breathing valve? - HCBBS Forum
3. Relationship between the bottom liquid level and bottom pressure in a distillation column - HCBBS Forum
4. What are the definitions of viscous and incompressible fluids? What should be used for differentiation? - HCBBS Forum
5. A company in Xi’an is in urgent need of 3 registered chemical engineers; the company is honest and reliable, suitable for long-term cooperation - HCBBS Forum
6. What is the typical temperature of the steam produced by the generator in a lithium bromide chiller? - HCBBS Forum
7. For high-purity PFA lined tubes with organic solvents as the internal medium, how can static electricity be prevented during safe design? - HCBBS Forum
8. Pump start/stop signal - HCBBS Forum
9. Regarding the issue of oxygen injection into styrene storage tanks - HCBBS Forum
10. What is the difference between the measured flow rates of saturated steam and superheated steam under the same conditions? - HCBBS Forum
11. Can the solution containing powdered activated carbon be stored in carbon steel? - HCBBS Forum
12. Is drilling wells in chemical plants illegal? - HCBBS Forum
13. Selection of centrifugal filter - HCBBS Forum
14. The chemical solution produces a lot of foam - HCBBS Forum
15. Problem of circulating water consumption in the device - HCBBS Forum
16. 2. How much acid and alkali is required to define it as a tank farm? - HCBBS Forum
17. I would like to ask: for the anti-corrosion protection of carbon steel in anaerobic towers, what methods do you use to achieve good anti-corrosion results? - HCBBS Forum
18. Does anyone know how the circulation valve pipeline that is activated when the fan starts is configured? - HCBBS Forum
19. Can explosion suppression type flame arresters replace explosion ignition suppression type flame arresters? - HCBBS Forum
20. Liquid chlorine secondary buffer tank - HCBBS Forum
21. Chemical Engineering Professional Title - HCBBS Forum
22. What specifications and factors are primarily considered when determining whether floor-mounted explosion-proof distribution cabinets or automatic control cabinets can be installed in Class A plant areas? - HCBBS Forum
23. Regarding the set pressure of the safety valve - HCBBS Forum
24. Ammonia gas water absorption - HCBBS Forum
25. Pipeline class code - HCBBS Forum
26. What is the typical set pressure for the safety valve on the outlet pipeline of a metering pump? - HCBBS Forum
27. Do you know anything about the benefits offered by Sichuan Provincial Chemical Engineering Design Institute? - HCBBS Forum
28. Adjacent to the cabinets in the plant area - HCBBS Forum
29. Turn fitting on pipe - HCBBS Forum
30. Position issue of the control valve - HCBBS Forum
31. Are there any experts who can perform simulations related to adsorption, waste gas spraying, condensation heat exchange, evaporation, and distillation? Can we add each other on WeChat? - HCBBS Forum
32. Can the excess nitrogen from the refinery air separation unit be integrated into the purification air system? - HCBBS Forum
33. Is it necessary to set up a cofferdam around the pump inside the pump house? - HCBBS Forum
34. How is the absorption efficiency of various exhaust gas components through spraying, or using water or acids and bases, calculated? Are there any reference materials? - HCBBS Forum
35. May I ask, for temperatures below 100 degrees and pressures ranging from -0.05 to 0.2 MPa, can silicone oil be used in pressure transmitters that measure negative pressures? - HCBBS Forum
36. This type of lightweight vertical multi-stage centrifugal pump has never been serviced before – is its quality that good? - HCBBS Forum
37. In EPC chemical or environmental protection turnkey projects, what are the common items that tend to be overlooked in the quotes? - HCBBS Forum
38. Can clamped valves, such as clamped butterfly valves, be used for pipelines carrying flammable and explosive liquids? - HCBBS Forum
39. Superheated steam gas exchange - HCBBS Forum
40. The main product obtained from the top of the distillation tower is of acceptable quality, but the concentration of heavy components is above the specified limit? - HCBBS Forum
41. Nanometer - HCBBS Forum
42. One of the best resources for beginners and advanced learners in heat exchanger design - HCBBS Forum
43. Twin-screw extruder - HCBBS Forum
44. Materials of equipment for softening water - HCBBS Forum
45. What do these symbols in a PID flowchart mean? - HCBBS Forum
46. How can 6kg of saturated steam be converted into superheated steam by making adjustments to the pipeline? - HCBBS Forum
47. Hydrochloric acid deep-lysis boiling breaker - HCBBS Forum
48. Regarding the Bentley power supply issue for the unit - HCBBS Forum
49. Can a platinum resistor with a protective tube come into direct contact with the medium? - HCBBS Forum
50. Is the environmental protection Class B qualification still divided into wastewater and waste gas? Can a diagram of the exhaust gases be generated? - HCBBS Forum
51. Registered Chemical Engineer Examination - HCBBS Forum
52. Drilling of the check valve - HCBBS Forum
53. Methylmagnesium chloride - HCBBS Forum
54. Regarding the issue of nitrogen seal gas velocity - HCBBS Forum
55. Calculate the concentration of fuming sulfuric acid - HCBBS Forum
56. How much are the operating costs for catalytic wet advanced oxidation in wastewater treatment? What are the issues in actual operation? - HCBBS Forum
57. Which company is good at gasification technology? - HCBBS Forum
58. Seeking help: I’m not sure if there are any issues with the calculation for heating the steam coil in this water tank; I’d appreciate it if some experienced colleagues could take a look at it. - HCBBS Forum
59. Who has the drawings for the foundation of chemical tower equipment? - HCBBS Forum
60. Seeking advice on the issue of neutral materials becoming acidic after water removal using molecular sieves - HCBBS Forum
61. Why can’t CAD open a SOLIDWORKS file saved in SAT format? - HCBBS Forum
62. Questions regarding exhaust gas boilers - HCBBS Forum
63. Sealed valve for isolating solids - HCBBS Forum
64. When counting the dimensions of pipeline materials, does one need to deduct the space occupied by elbows, tees, and valves? - HCBBS Forum
65. May I ask whether it is better to build a 30-cubic-meter hydrochloric acid storage tank in an upright or horizontal configuration? - HCBBS Forum
66. So many people have been causing trouble these days; I’ve started posting randomly. - HCBBS Forum
67. Aspen v11 learning *questions - HCBBS Forum
68. The purpose of installing dual valves - HCBBS Forum
69. How can pipeline blockage be prevented when injecting lime milk through pipelines? Is there any good solution? - HCBBS Forum
70. What is the difference between A105 and WCB as valve body materials? - HCBBS Forum
71. Can the project proceed by submitting the as-built drawings directly to the owner, without first having a qualified firm prepare the construction drawings? - HCBBS Forum
72. Can a shell-and-tube condenser be used for vacuum distillation? - HCBBS Forum
73. Reflux issue during unit startup - HCBBS Forum
74. Guide the installation, commissioning, and training of multi-effect evaporators - HCBBS Forum
75. Petrochemical Design Manual Volume 1 - HCBBS Forum
76. Position of the cooling water pipeline control valve - HCBBS Forum
77. Which company is good at wet catalytic oxidation? Seeking recommendations - HCBBS Forum
78. Calculation of air leakage rate in the vacuum system of a decompression tower - HCBBS Forum
79. Is it better to use a vertical or horizontal activated carbon exhaust gas adsorption tower? - HCBBS Forum
80. The confusion of Jianbei Design North - HCBBS Forum
81. The explosion-proof cabinet that comes with the exhaust gas system is located on the roof of Owner’s Class A factory building. Is it necessary for this explosion-proof cabinet to have positive pressure ventilation? - HCBBS Forum
82. Regarding the issue that the detection ratio for fixed ports should be no less than 40%! - HCBBS Forum
83. Valve Cv calculation parameters - HCBBS Forum
84. Is it correct to say that since the equipment is not a pressure vessel, there is no non-destructive testing? - HCBBS Forum
85. Chemical diagram legend - HCBBS Forum
86. Selection of pressure and temperature ratings for HG/T20592 flanges - HCBBS Forum
87. Which design institute has a process package for sodium bicarbonate production? - HCBBS Forum
88. What size of boiler or evaporator requires continuous blowdown or periodic blowdown? - HCBBS Forum
89. I often encounter situations where fiberglass-reinforced plastic is used for corrosion protection on tanks or mixers. Is electrical spark testing required for such corrosion protection, according to the standards? - HCBBS Forum
90. What is the typical pressure loss in Pa for air butterfly valves DN150 and DN300 used in exhaust gas treatment? - HCBBS Forum
91. How to calculate the outlet temperature of the material in a heat exchanger - HCBBS Forum
92. During an emergency shutdown of a natural gas water vapor conversion top-fired furnace, can the conversion tubes be left without steam purging? - HCBBS Forum
93. CO2 absorption desorption - HCBBS Forum
94. Excuse me, what material is good for insulation when keeping water at 5 degrees? - HCBBS Forum
95. The materials for the stainless steel hoses used for the air supply in pneumatic valves, as well as the air supply valves and pneumatic triple units, – who is responsible for installing these air supply pipelines for the pneumatic valves? - HCBBS Forum
96. Looking for some books on *air separation technology - HCBBS Forum
97. Discharge issue of the thickener - HCBBS Forum
98. Chiller selection - HCBBS Forum
99. What is the storage capacity of a hydrogen storage tank and what is the corresponding safety management level? - HCBBS Forum
100. Applying for a job as a chemical engineer, with an intermediate professional qualification certificate - HCBBS Forum