English — Forum #337 (Page 27/163)

1. Hangyang distillation tower process flow - HCBBS Forum
2. Interlock for storage tank level setting - HCBBS Forum
3. Does the exhaust gas adsorption fan have any components or measures to protect it against overpressure? - HCBBS Forum
4. Aspen V14 license check failed - HCBBS Forum
5. I seek advice from experts on how to accurately calculate the boiler blowdown rate - HCBBS Forum
6. Draw temperature from the owner’s heat exchanger in the air separation unit - HCBBS Forum
7. Help! Will the deaerator water temperature decrease, will it have any impact on Gaojia? Thanks! - HCBBS Forum
8. Calculation of VOC emissions from storage tanks and nitrogen volume for nitrogen sealing - HCBBS Forum
9. Experts, I have a question regarding the requirements for chilled water tanks: are there any standards specifying the minimum size that such tanks must have? Thank you so much! ! - HCBBS Forum
10. Liquefied hydrocarbon spherical tank sampling - HCBBS Forum
11. Freezing points of bisphenol A solutions at various concentrations - HCBBS Forum
12. What is the function of the cross-line design of the centrifugal pump outlet check valve? - HCBBS Forum
13. What type of pneumatic valve is this? - HCBBS Forum
14. Are there any differences between butt-welded and socket-welded flanges for steel pipes lined with plastic or PTFE? - HCBBS Forum
15. Design sequence: process flow diagram, equipment layout plan, equipment drawings, and plant building construction drawings - HCBBS Forum
16. Based on energy balance, is it correct to assume that 1 ton of circulating water requires 7 kWh of electricity? - HCBBS Forum
17. Nitrogen seal flow rate calculation - HCBBS Forum
18. Issues with mating flanges for ceramic-lined pipelines - HCBBS Forum
19. Which is better for use on pipelines carrying acids and bases at room temperature: ball valves or diaphragm valves? What’s the difference between the two? - HCBBS Forum
20. May I ask what negative pressure can be achieved using a fan for exhaust gas adsorption, in Pa? - HCBBS Forum
21. How to measure the surge line of a syngas compressor on-site - HCBBS Forum
22. [Huaan HSE Q&A] (Issue 108) Keywords: procedures for park utility tunnels, laboratories in Factory A and Factory B, acute toxicity, identification of hazardous chemicals, safety audits, interlock deactivation - HCBBS Forum
23. Supervisory inspection of pressure vessels - HCBBS Forum
24. Based on experience, what type of coupling is generally used for this type of pump? - HCBBS Forum
25. What do these PID symbols mean? - HCBBS Forum
26. According to the regulations, should a 20-cubic-meter hydrochloric acid storage tank and a 20-cubic-meter liquid alkali storage tank be classified as a tank farm? - HCBBS Forum
27. The brine contains free chlorine - HCBBS Forum
28. For saturated steam pipes under what pressure level should 20G be chosen? - HCBBS Forum
29. Table 4.2.12 of the petrochemical regulations specifies only the spacing requirements between Class A, B, and C plant areas; so how is the spacing for Class D and E areas determined? - HCBBS Forum
30. A few questions about non-metallic pipes? - HCBBS Forum
31. May I ask what aspects should be considered when evaluating the documents sent by the purchaser for bidding purposes? Is it not reasonable to provide technicians with a fair purchase price? - HCBBS Forum
32. Uniform flow distribution design for gas absorption towers - HCBBS Forum
33. Requirements for the SH3009 acidic flare - HCBBS Forum
34. What are the disadvantages of not having a single-acting valve installed on the top of the tank? - HCBBS Forum
35. Experience Sharing in Chemical Process and Control - HCBBS Forum
36. How can dimensions be annotated in bulk for the system diagrams (axonometric views) generated by Tianzheng for water supply and drainage systems? - HCBBS Forum
37. Search for technologies to produce vinyl chloride monomer VCM from acetylene - HCBBS Forum
38. Pipeline flow velocity simulation - HCBBS Forum
39. Regarding the definition of “non-fire hazardous facilities” in petrochemical regulations - HCBBS Forum
40. Powder pneumatic conveying system and equipment - HCBBS Forum
41. Blockage at the inlet of the water ring vacuum pump in the gas phase of the sulfur-containing wastewater tank - HCBBS Forum
42. Is it necessary to install a combustible gas alarm for trichloromethane? - HCBBS Forum
43. What are the flowmeters used to measure the flow of methanol and ethanol? Can a orifice plate flow meter be used? - HCBBS Forum
44. How to improve coal leakage to the next bin - HCBBS Forum
45. How to consider fire separation distances for pilot-scale plants - HCBBS Forum
46. Does n-octyl phthalate undergo a reverse hydrolysis reaction with water at high temperatures to form acid and alcohol? - HCBBS Forum
47. The magnitude of the acid hydrocarbon ratio - HCBBS Forum
48. What is the maximum concentration of ammonia that can be achieved in ammonia water obtained from the ammonia nitrogen stripping tower in wastewater treatment? What is the highest concentration that sulfuric acid an can be made at? - HCBBS Forum
49. Pipe pressure sampling tool - HCBBS Forum
50. Why does the outlet pipeline of a reciprocating compressor vibrate? - HCBBS Forum
51. Which is more resistant to chloride ions: 904 stainless steel, duplex steel, or titanium? - HCBBS Forum
52. Pipeline pressure test time - HCBBS Forum
53. How is an exhaust gas sampling device made? Are there any images for reference? - HCBBS Forum
54. Is there any anti-corrosion coating that provides a smoother surface for sludge hoppers? - HCBBS Forum
55. When spraying carbon disulfide with water, how can we prevent air dissolved in the water from being introduced? - HCBBS Forum
56. What is a normal-pressure device, and what is the difference between it and a pressure-bearing device? - HCBBS Forum
57. What are the standards for determining the list and quantities of spare parts and wear-prone components? - HCBBS Forum
58. Question regarding the definition of the installation height Hg for the HG20570.5 pump - HCBBS Forum
59. If there are no flammable or explosive substances, only strongly oxidizing agents such as oxygen. Does chlorine also need to be protected from fire and explosions? - HCBBS Forum
60. What to do if an enamel kettle is corroded due to a reaction with hydrobromic acid, sulfuric acid, and n-butanol? - HCBBS Forum
61. Experts, regarding issues related to the heat tracing of benzene pipelines. - HCBBS Forum
62. Nitrogen pipeline on the single call valve - HCBBS Forum
63. Thickening of the inner cylinder of the pressure vessel - HCBBS Forum
64. The FAT scheme meets the documentation requirements specified in URS. What do FAT and URS mean? - HCBBS Forum
65. Steam water bath vaporizer - HCBBS Forum
66. What is the current situation of the caustic sulfide market? - HCBBS Forum
67. Pressure vessels cannot withstand negative pressure; what methods and automatic controls can be used to prevent the occurrence of negative pressure? - HCBBS Forum
68. Oxidative dehydrogenation to butadiene - HCBBS Forum
69. Are the regulations on the scope and scale standards for construction project supervision still in force? - HCBBS Forum
70. How to unload liquefied hydrocarbon 1-butene - HCBBS Forum
71. If the wastewater contains elemental iodine, which is volatile, what is the fire hazard classification for the plant area? Is explosion protection needed? - HCBBS Forum
72. What measures should be taken to prevent siphoning in the centrifugal pump when pumping liquid from the third floor to the first floor? - HCBBS Forum
73. Practical Materials Handbook for Petrochemical Plants by Sun Youli - HCBBS Forum
74. Comparison of Material Grades by Country.pdf - HCBBS Forum
75. Is it correct to connect the steam trap directly to the main steam pipe like this? Is there such a trap? - HCBBS Forum
76. Chemical engineering design - HCBBS Forum
77. Can the salts in alcohol be filtered out through a filter? - HCBBS Forum
78. reactor - HCBBS Forum
79. This research is a bit brain-taxing! ! The “Machine Chemist” at the University of Science and Technology of China uses Martian meteorites to intelligently create oxygen-producing catalysts - HCBBS Forum
80. Have you ever used a particle foreign object screening machine? Could you recommend some? - HCBBS Forum
81. What are the process technologies for the pretreatment of hydrogen production from coke oven gas? - HCBBS Forum
82. Regular inspection of pressure pipelines within the installed device after delivery - HCBBS Forum
83. What security issues should be considered in RTO design? The more comprehensive, the better? Reply for extra points - HCBBS Forum
84. The reaction principle between acetylene and copper - HCBBS Forum
85. Are there regulations stating that plastic pipes are not allowed in Class A and B factories? Do you have plastic pipes in your workshop? - HCBBS Forum
86. Standard PID drawing method - HCBBS Forum
87. The fan requires a spark-proof design of AMCA class “B”. Is there an electronic version of the detailed AMCA standards available? - HCBBS Forum
88. What key points need to be examined when the equipment team returns the assembly drawings to the process team for review? - HCBBS Forum
89. Regarding water seals - HCBBS Forum
90. For exhaust gas treatment, is it better to use a fan connected by a belt or a fan with a direct connection? - HCBBS Forum
91. How to install static electricity conductors within an insulated resin bed layer, and how to do it properly? - HCBBS Forum
92. Absorbents for nitrogen oxides - HCBBS Forum
93. What type of safety valve should be used on the outlet pipes of the metering pumps connected to the caustic soda and sulfuric acid pipelines? - HCBBS Forum
94. Issues with the sealing type of rotary vane blowers - HCBBS Forum
95. Propylene column of ethylene-propylene dehydrogenation unit - HCBBS Forum
96. Does anyone know the method for calculating the calorific value of flue gas and waste liquids containing fluorine and chlorine when burned? - HCBBS Forum
97. Safety Supervision Administration General Order No. 3 [2017] 121** Safety Supervision Administration on the Issuance of the Guidelines on Major Potential Hazards for Production Safety Incidents in Chemical and Hazardous Chemicals Production and Operation Enterprises... - HCBBS Forum
98. What certificates can be obtained in the chemical industry? - HCBBS Forum
99. What on earth is phase-change energy storage? Is it widely applicable? - HCBBS Forum
100. Heat exchanger engineering design and simulation calculations - HCBBS Forum