English — Forum #337 (Page 22/163)

1. Why can the design surface load of a radial flow sedimentation tank with water inlet at the periphery be about twice that of one with water inlet at the center and water outlet at the periphery? - HCBBS Forum
2. Urgent! Please help calculate what size the area of the following tube heat exchanger should be - HCBBS Forum
3. When installing fixed fire pumps in the process production units of petrochemical enterprises, how should the cooling area be determined? I don’t see any relevant regulations in the petrochemical industry standards either; does anyone have any advice? - HCBBS Forum
4. For the hydrochloric acid mixer, since it needs to be constructed in sections underwater, what are some good materials for the bolts, and what are effective methods for preventing corrosion? - HCBBS Forum
5. 7. For a single-acting valve, if the solenoid valve loses power but air supply continues, will the solenoid valve return to its original position? - HCBBS Forum
6. The following standards are urgently needed - HCBBS Forum
7. I was wondering if there are detailed wiring diagrams for pneumatic valves and air supply pipes. Does this fall under the scope of the instrumentation field or the process engineering field? - HCBBS Forum
8. Issues regarding the placement of equipment beneath utility tunnels - HCBBS Forum
9. Is it useful to use crushed activated alumina in hydrogen peroxide production? - HCBBS Forum
10. Does a trimethylamine sphere tank require spray nozzles? - HCBBS Forum
11. First application of chemical engineering processes - HCBBS Forum
12. Condition of the liquid seal tank connected to the centrifuge mother liquor outlet - HCBBS Forum
13. Job ticket equipment - HCBBS Forum
14. How is the air consumption of a pneumatic valve calculated, based on the volume of the cylinder and the actuation time, to determine the amount of instrument air required? - HCBBS Forum
15. Advantages of chemical coatings - HCBBS Forum
16. Knowledge about diaphragm pumps - HCBBS Forum
17. The cost of trichlorosilane is 6,200 yuan per ton, but between 2013 and 2019 the market price was 3,000–4,000 yuan per ton? - HCBBS Forum
18. Handbook of Physical Property Data for Chemicals and Materials: Inorganic Substances - HCBBS Forum
19. I have many individual CAD files; is there any way to modify the drawing frames in bulk, or are there any plugins that can do this? - HCBBS Forum
20. Torch water seal tank foundation - HCBBS Forum
21. Which teacher can come and help explain the model? - HCBBS Forum
22. Calculating horizontal gas-liquid separation: how to read the diagrams? - HCBBS Forum
23. How to convert 1700W for the ammonia cooler into ammonia consumption in KG: inlet temperature 10 degrees, pressure 1.6 MPa; outlet temperature -0.032 MPa, temperature 38 degrees - HCBBS Forum
24. Methanol storage tanks also hold hydrochloric acid – can tanks with a steel lining and plastic interior be used? Is stirring needed as well? How is static electricity derived? - HCBBS Forum
25. Is there something wrong with the viscosity unit in the Chemical Engineering Handbook? - HCBBS Forum
26. Where can I find the fire separation distances for Class A and B installations, as well as for factories (or warehouses) of Classes A, B, C, D, and E? How was it determined? - HCBBS Forum
27. Use of the DCS trend chart module in the Yokogawa VP system - HCBBS Forum
28. Why must the spray valve of the rotary compressor in an MVR system be installed at the compressor inlet rather than the outlet? - HCBBS Forum
29. The pressure in the closed pipeline increases unintentionally - HCBBS Forum
30. Polypropylene extruder - HCBBS Forum
31. Seeking help regarding the definition of trial operation - HCBBS Forum
32. Chemical pipeline material grade code description - HCBBS Forum
33. Is it necessary to make an electrostatic bond for the inner valve disc of the fire-resistant breather valve for oil storage tanks that operates around the clock? - HCBBS Forum
34. Can holes be drilled in the walls of Class A factories to install air supply fans? - HCBBS Forum
35. 50-60% alcohol (methanol or ethanol), with the rest being water, along with a small amount of acids and bases – can this be measured with a pH meter? - HCBBS Forum
36. Vacuum desolvation - HCBBS Forum
37. What is this? It’s installed everywhere in the factory - HCBBS Forum
38. Should there not be at least two entrances and exits for the factory premises? - HCBBS Forum
39. Seeking advice on changes in the feed composition of a distillation column - HCBBS Forum
40. May I ask if water pipes can be installed along the exterior walls of the power distribution room and control room, with brackets mounted on the walls? - HCBBS Forum
41. Searching for a process to produce synthetic rutile using the reduction of rust method - HCBBS Forum
42. For component analysis and formula restoration testing services, contact me - HCBBS Forum
43. Provide technical guidance on dichloro, trichloro, and cyanuric acid - HCBBS Forum
44. Are gaskets still required for the connection of lined pipes in accordance with standard specifications? Is there a regulatory basis? - HCBBS Forum
45. Pressure control - HCBBS Forum
46. Vacuum system leakage **/ Industry standards - HCBBS Forum
47. What does “high-score gas” mean? - HCBBS Forum
48. What units are LPM and SPM? - HCBBS Forum
49. When the boiler is drained regularly, is it necessary to stop adding water? - HCBBS Forum
50. Yellow phosphorus electric furnace gas duct cleaning device - HCBBS Forum
51. How should the thickness and outer diameter of the PTFE gasket be selected for flanges of different sizes? Are there any standards? - HCBBS Forum
52. 206-For the gas extraction liquid ring pump used in coalbed methane operations, an upgraded separation system using a vane separator is adopted for the separation of the exhaust gas, xanthan gum solution, and other components - HCBBS Forum
53. What is the voltage for pneumatic valves, flow meters, pH meters, pressure gauges, thermometers, and other devices with remote transmission functions? - HCBBS Forum
54. May the discharge pipes of the safety valves for multiple devices in the same category be combined into one main pipe for drainage? - HCBBS Forum
55. Is it better to use rubber lining or plastic lining for ion exchange resin towers? Can a sight glass be installed on it? Have there been anyone who has used it? - HCBBS Forum
56. Professional lining of pipes and equipment manufacturing – Cangzhou Yingxu - HCBBS Forum
57. I’ve been thinking about looking into the lithium battery separator industry lately. - HCBBS Forum
58. Grade 0.5 chemical reactions in fully mixed flow reactors — Published by Cheng Huiting - HCBBS Forum
59. Seeking advice - HCBBS Forum
60. High-elasticity waterproof resin, roof waterproof coating, highly adhesive and strong tile adhesive - HCBBS Forum
61. Please contact me if you are a manufacturer capable of separating non-condensable gases from the top of distillation towers. - HCBBS Forum
62. Advanced Reactor Modeling with MATLAB: Case Studies with Solved Examples - HCBBS Forum
63. Points of doubt. - HCBBS Forum
64. May I ask about the mixing tank used to prepare lime slurry by adding lime powder; how should the exhaust gas be treated? Can it be released directly into the atmosphere? - HCBBS Forum
65. What constitutes the internal pressure of a container? - HCBBS Forum
66. Piping one-line diagram scraping - HCBBS Forum
67. Production process flow for acrylate compounds - HCBBS Forum
68. What types of testing are carried out on the steel used for manufacturing equipment before it is used? The more comprehensive, the better - HCBBS Forum
69. Heat exchanger calculation - HCBBS Forum
70. Differences between PFA volumetric flasks and glass volumetric flasks - HCBBS Forum
71. Textbooks for Registered Chemical Engineers - HCBBS Forum
72. Heating in thermal deaerator - HCBBS Forum
73. Types of molybdenum mineral processing reagents - HCBBS Forum
74. Converter temperature - HCBBS Forum
75. What is the general comprehensive tax rate for equipment? What is the percentage rate for equipment installation fees based on the number of devices? - HCBBS Forum
76. On the main steam pipe, there is a control valve that is meant to regulate both the steam flow rate and the steam pressure. How is this control achieved? - HCBBS Forum
77. Process flow diagram and operating procedures for coal-based ethanol - HCBBS Forum
78. What are the current costs associated with starting up, shutting down, and carrying out daily sulfur production in sulfur off-gas recovery units? - HCBBS Forum
79. What qualifications are required to produce drawings for high-temperature and high-pressure wet oxidation and evaporation crystallization processes in wastewater treatment? - HCBBS Forum
80. Is solid sodium methoxide classified under Category A, Item 4, or Category A, Item 6? - HCBBS Forum
81. Please take a look at which standard this comes from. - HCBBS Forum
82. May I ask if 40-degree **furan can use 304 material? - HCBBS Forum
83. Handbook of Chemical Process Design (Fifth Edition) - HCBBS Forum
84. Should the make-up air control valve for the incinerator be open when air pressure is lost or closed? - HCBBS Forum
85. Deformation analysis of hot water tanks - HCBBS Forum
86. Pressure on the main oil and gas line at the top of the coke tower - HCBBS Forum
87. What is an appropriate flow rate for the hydrogen gas? - HCBBS Forum
88. The assessment for the welder’s certificate in the green booklet covers TIG welding; in reality, it refers to argon arc welding (pure argon) - HCBBS Forum
89. PID letter code - HCBBS Forum
90. Questions about the type of outlet nozzle of the atmospheric storage tank? - HCBBS Forum
91. I would like to ask: what materials can be used as substitutes for the aging sealing rings at both ends that penetrate through the ground surface? Is there any remedy? - HCBBS Forum
92. Question! ! Regarding the drawing of Risk 4** - HCBBS Forum
93. The flow pattern of a fluid under the following conditions - HCBBS Forum
94. Calculation of compressed air consumption - HCBBS Forum
95. Convert umol/mol to ppm - HCBBS Forum
96. Problems in the chemical new materials industry - HCBBS Forum
97. Parameters of magnesium oxide waste acid neutralization mother liquor - HCBBS Forum
98. PKPMENG.SHX - HCBBS Forum
99. I would like to ask an expert to explain the meaning of the English letters in the table below. - HCBBS Forum
100. Do horizontal tanks of Class A B and Class C with gas sealing require emergency pressure relief equipment? - HCBBS Forum