English — Forum #337 (Page 24/163)

1. After completing the HAZOP, SIL classification is carried out using LOPA. Is it necessary to attach the main HAZOP report to this document? - HCBBS Forum
2. What kind of pH meter and level gauge are suitable for using in a mixing tank for preparing lime slurry by adding powdered lime? - HCBBS Forum
3. Can 316L be used with 30-40% sulfuric acid at a temperature of 20-30 degrees? - HCBBS Forum
4. What are the methods for treating the vapor phase at the top of the nitric acid storage tanks in various installations? - HCBBS Forum
5. On-site online instruments-----How to detect the concentrations of two liquids in three mixtures online - HCBBS Forum
6. Could some expert please explain how to interpret the graph of this extraction distillation column? - HCBBS Forum
7. The electromagnetic flowmeter uses a four-wire/4~20mA configuration; what about pressure, temperature, and level sensors – what is their wiring configuration? - HCBBS Forum
8. What are the initial operation steps for using a nitrogen-sealed tank for flammable liquids, and what parameters need to be tested? - HCBBS Forum
9. What material is suitable for use when the ammonium chloride content is 15%, the product is neutral, it contains 3000 ppm of p-***amine, and the operation takes place at room temperature? - HCBBS Forum
10. Flame-retardant cable tray - HCBBS Forum
11. Process Technology Management System for Chemical Enterprises - HCBBS Forum
12. How can chlorobenzene and toluene, as well as dichloroethane, be separated in the aqueous phase? - HCBBS Forum
13. Is 316L material suitable for a 10% ferrous sulfate solution at room temperature and normal pressure? - HCBBS Forum
14. Are there PPH pipes available in PN16? Does anyone have a chart showing the nominal diameter and outer diameter of PPH pipes? - HCBBS Forum
15. Regulations on the splicing of H-shaped steel - HCBBS Forum
16. Purification and dehydration of epichlorohydrin - HCBBS Forum
17. Defense Questions for Senior Chemical Engineers - HCBBS Forum
18. Diesel double-wall tank (steel inside, fiberglass reinforced plastic outside) - HCBBS Forum
19. The meaning of chemical reaction equations - HCBBS Forum
20. Steam is introduced into the jacket of the reaction vessel, and the temperature rises sharply to 130°. What is the reason for this? - HCBBS Forum
21. Does gaseous sulfuric acid corrode 904L steel plates? - HCBBS Forum
22. The height of the high-level tank is set at 12 meters. I would like to ask how many meters of straight pipe section can be used for transportation - HCBBS Forum
23. The project is located quite far away; how can warranty service be provided for 2 years after the acceptance? - HCBBS Forum
24. What are the typical protection ratings and insulation levels for outdoor explosion-proof automatic control cabinets? - HCBBS Forum
25. I would like to ask: for three storage tanks containing concentrated hydrochloric acid at a concentration of 30%, are there any regulations requiring the construction of fire dikes? - HCBBS Forum
26. Urgent: Seeking paid help to create a PID flow diagram for a separator - HCBBS Forum
27. In N-ethylcarbazole, can the letter N be pronounced as the \"dan\" sound of nitrogen? - HCBBS Forum
28. Can rock wool be used as insulation material on the outside of stainless steel pipes? - HCBBS Forum
29. May I ask about the operating costs? How much is it per ton for steam, circulating water, 7-degree water, and -25-degree water? - HCBBS Forum
30. Can a dew point of minus 40 degrees for process gas be achieved using freeze-drying? - HCBBS Forum
31. Is there any regulatory requirement for flaw detection inspections for devices that can withstand a liquid pressure of 4-5 kg, and which are not considered pressure vessels? - HCBBS Forum
32. The concentration of toluene in the exhaust gas is 85,000 mg/m3; can it be condensed at minus 25 degrees? - HCBBS Forum
33. Can equipment manufacturing companies put their own company name on the nameplates of their equipment? What are the potential risks? - HCBBS Forum
34. With several filters operating in parallel, how can one determine which filter is clogged and needs to be cleaned? - HCBBS Forum
35. Coordination Chemistry, edited by Luo Qinhui and Shen Mengchang - HCBBS Forum
36. As a professional manufacturer of conductive PP pipes, we recommend Jiangsu Shenda Pipe & Valve Co., Ltd. to you - HCBBS Forum
37. Discussion on the exhaust ring coil of the acrylonitrile reaction gas cooler - HCBBS Forum
38. Without the qualification for exhaust gas design, only the qualification for wastewater design is available – is it still possible to produce equipment diagrams and piping diagrams related to exhaust gas? - HCBBS Forum
39. Are there registered chemical engineers looking for a job? - HCBBS Forum
40. Welding between pipe fittings - HCBBS Forum
41. Is the pump base fixed directly to the concrete floor? - HCBBS Forum
42. Calculate the bubble point pressure of multi-component systems! ! - HCBBS Forum
43. How can leaks be detected in 80-mesh metal wire mesh? Is there any way? - HCBBS Forum
44. The role of outlet water monitoring in the hydrolysis reactors for substances A and B - HCBBS Forum
45. Regarding pressure vessels, to prevent vacuum formation, is there a specific type of vacuum break valve available for selection? - HCBBS Forum
46. What values should be used for the flow rates in the main pipes and branch pipes for VOC waste gas? - HCBBS Forum
47. What does the model number of a PP nozzle mean? - HCBBS Forum
48. May I ask the expert: cannot the utility pipes and the flammable and explosive pipes of categories A and B be located in the same pipe rack? - HCBBS Forum
49. Corrosive questions - HCBBS Forum
50. Nickel sulfate iron removal - HCBBS Forum
51. Seeking help with calculations for a heating furnace - HCBBS Forum
52. General standards and technical requirements for steel pipes and pipe fittings - HCBBS Forum
53. Is the vulcanization process for equipment gaskets carried out at room temperature? Are there any standard requirements for this? - HCBBS Forum
54. Purifying crude ethylene gas to “polymerization-grade” ethylene using pressure swing adsorption technology - HCBBS Forum
55. Foreign design drawing annotations - HCBBS Forum
56. What is the maximum concentration of dilute sulfuric acid at room temperature that 316L material can withstand? 20-30% of the capability? - HCBBS Forum
57. Can plastic PP pipes be heated with steam outdoors? - HCBBS Forum
58. Regarding the process flow diagram - HCBBS Forum
59. Common pressure units and conversions in process engineering (bar, Torr) - HCBBS Forum
60. What is the minimum diameter possible for valves with a steel lining and flanges? - HCBBS Forum
61. What is the nominal diameter of a pipe that corresponds to M20×1.5? What size of pipe does it connect to? - HCBBS Forum
62. I would like to ask: in high-salt wastewater systems such as those containing sodium sulfate, potassium sulfate, and sulfuric acid, what could be the reasons for crystals forming on the surface of the solid phase? - HCBBS Forum
63. For the loading and unloading of liquids such as toluene in tank cars, these tank cars and storage tanks should be equipped with vapor equilibrium pipes; will this mean that exhaust gases won’t be released from the storage tanks? - HCBBS Forum
64. Regarding the selection of temperature for the cooling medium in the reactor? - HCBBS Forum
65. Control measures for oxygen content in storage tanks after adding TBC (aerobic type) to self-polymerizing materials - HCBBS Forum
66. How to determine the spacing between collection ports for capturing leaking flammable vapors - HCBBS Forum
67. Is there a specified source for the HAZOP analysis to be conducted every three years? - HCBBS Forum
68. Seeking help: Measures for the supervision and management of process inspection - HCBBS Forum
69. Questions regarding the water balance - HCBBS Forum
70. How much straight pipe is required before and after using a vortex flowmeter to measure steam, and can it accurately measure the mass flow rate of superheated steam? - HCBBS Forum
71. What are the effects of choosing a larger diameter for the breathing valve? - HCBBS Forum
72. Classification of major hazard sources in tank areas - HCBBS Forum
73. Are there hydraulic safety valves made with a steel lining and PTFE material? - HCBBS Forum
74. Can the alkylation and nitration units be arranged together? - HCBBS Forum
75. RF admittance level gauge activated - HCBBS Forum
76. Can this happen with a steam ejector? - HCBBS Forum
77. Can the fan operate at any frequency after being equipped with an inverter? What are the effects, such as at 2HZ? - HCBBS Forum
78. By how much above the temperature of saturated steam pressure must the temperature of superheated steam generally be before it becomes necessary to reduce its temperature and pressure? - HCBBS Forum
79. Negative pressure distillation of dichloromethane - HCBBS Forum
80. The reaction equation for the formation of sulfuric acid - HCBBS Forum
81. Pressure of low-pressure gas breaking through the water seal - HCBBS Forum
82. 【Haichuan Equipment Guessing Game】Is a super-large club about to be stored? ? ? - HCBBS Forum
83. Can an exhaust gas project be contracted to a manufacturing equipment factory that does not have the necessary qualifications? What are the risks? - HCBBS Forum
84. Can labor contracts be signed for chemical engineering projects? - HCBBS Forum
85. What diameter steel pipe is standardly suitable for drilling a hole in, installing a socket clamp, and then attaching a pressure gauge? - HCBBS Forum
86. Seeking an introduction to the process of chlorinated palm oil methyl ester production - HCBBS Forum
87. Reaction of p-toluenesulfonic acid with elemental Cu? - HCBBS Forum
88. How to separate sodium pyrophosphate from sodium chloride - HCBBS Forum
89. Which standard specifies that hydrogen pipelines must be installed above the ground? - HCBBS Forum
90. Gas pressure feeding issue - HCBBS Forum
91. Reaction of 2-(3-chloromethyl) carbonate with trifluoroanilidoyl chloride - HCBBS Forum
92. After entering through the room door, the clear height of the room is 6.2 meters, and the tower equipment stands 5.6 meters tall - HCBBS Forum
93. Process for filling gas cylinders by stopping the pump in buried liquefied petroleum gas storage tanks - HCBBS Forum
94. Intermediate professional title - HCBBS Forum
95. Issues with feed in three-effect forced circulation evaporation - HCBBS Forum
96. For the adsorption of exhaust gas in multiple parallel towers, how can the air flow be distributed evenly? - HCBBS Forum
97. Why do experts say it’s necessary to install a water seal tank before an exhaust gas scrubber? - HCBBS Forum
98. When HG/T20592 flanges are used as equipment flanges, is it necessary to conduct checks? - HCBBS Forum
99. 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
100. I would like to ask for good methods of adding powder materials. - HCBBS Forum