English — Forum #337 (Page 30/163)

1. Help-seeking criteria - HCBBS Forum
2. Is it necessary to install a vent valve and a safety valve on the top of the hydrogen peroxide storage tank? Can the exhaust outlet be directly opened to the atmosphere? - HCBBS Forum
3. Water filling test of the storage tank - HCBBS Forum
4. Synthesis reaction – treatment of ethylene off-gases - HCBBS Forum
5. Are there PID diagrams for double-acting and single-acting pneumatic valves that provide air supply and interlocking, as well as for the conversion of electrical signals to pneumatic signals? - HCBBS Forum
6. Does anyone have CAD drawings for the production of instrument air from compressed air? High reward available! - HCBBS Forum
7. Energy conversion of water hammer - HCBBS Forum
8. I have some questions regarding the \"Safety Technical Specifications for Cryogenic Air Separation Units (Draft for Comment)\“. - HCBBS Forum
9. Is a design qualification required to produce as-built drawings? What are the risks associated with signing ascertained drawings? - HCBBS Forum
10. Please convert the 7.0 version file of htri to a 6.0 version - HCBBS Forum
11. May I ask whether plastic pipes can be used for pipelines carrying Class A and B flammable liquids due to the presence of hydrochloric acid? Are there regulatory requirements that prohibit the use of plastic pipes? - HCBBS Forum
12. The transfer weights of the two storage tanks do not match - HCBBS Forum
13. Chinese name of the reaction product - HCBBS Forum
14. For chemical process pipelines, is it allowed to make openings using thermal cutting methods (oxygen cutting, plasma cutting)? - HCBBS Forum
15. The function of the bypass setting - HCBBS Forum
16. Regarding the ball valve model Q41F-16C, the manufacturer says that only the sealing surface is made of PTFE? Isn’t it lined with PTFE? - HCBBS Forum
17. Regarding the chilled water return issue - HCBBS Forum
18. Experts say the storage temperature for hydrochloric acid should not exceed 30 degrees? Which specification? - HCBBS Forum
19. Zhongkong Technology explores new approaches for safe production and energy conservation in China’s air separation industry - HCBBS Forum
20. 【Principles of Chemical Safety Design】Safety Valve - HCBBS Forum
21. How to do a good job in equipment maintenance management, what tasks should an equipment maintenance management engineer undertake, and how to establish one’s own system - HCBBS Forum
22. Hiring - HCBBS Forum
23. When encountering a project, how should one assess whether it can be undertaken? The more comprehensive, the better - HCBBS Forum
24. Are there valves available for pressure vessels that can prevent negative pressure inside the equipment? Similar to the reverse action of a safety valve - HCBBS Forum
25. Do you have any recommendations for manufacturers that specialize in membrane recovery of organic waste gases? - HCBBS Forum
26. Request for the operating procedures of high-pressure water injection for propylene spherical tanks - HCBBS Forum
27. The outlets of two fans with 5Kpa pressure and different air volumes are connected to a common duct. Is it possible not to install check valves at the outlets of these two fans? - HCBBS Forum
28. Why does the greater than or equal to symbol in an Excel cell become very large when the cell is double-clicked to edit it? - HCBBS Forum
29. Pipeline materials - HCBBS Forum
30. Production of plexiglass and acrylic sheets - HCBBS Forum
31. General Code for Fire Protection of Buildings [with Explanations to the Provisions] GB55037-2022 - HCBBS Forum
32. Urgent! Urgent! Urgent! Are there any regulations requiring the installation of solenoid valves and check valves for directing water from the water supply pipe into the water heater? - HCBBS Forum
33. Ask for the width of stainless steel sinks - HCBBS Forum
34. Is there such a thing as exhaust gas adsorption using a pipeline mixer for dilution? How is exhaust gas dilution carried out? - HCBBS Forum
35. Catalyst selection issue - HCBBS Forum
36. Graphite digester for digestion in food testing for heavy metals - HCBBS Forum
37. Equipment for the separation of nitrogen and hydrogen mixtures - HCBBS Forum
38. Problem of uneven pressure in gas pipeline branches - HCBBS Forum
39. Why does 68-70% sulfuric acid appear green? - HCBBS Forum
40. May I ask which brands are good at online LEL detection? - HCBBS Forum
41. Issues with the inlet and outlet of plate heat exchangers? - HCBBS Forum
42. Recommendations and self-presentations of excellent manufacturers of electric heating heat transfer oil furnaces - HCBBS Forum
43. Desalination requires the use of oil-soluble demulsifiers. What are the disadvantages of oil-soluble demulsifiers for subsequent production processes? - HCBBS Forum
44. How is the positioning of a single pipeline determined in a single-line diagram (isometric drawing)? - HCBBS Forum
45. The Fifth Edition of the Chemical Process Design Manual is divided into two volumes - HCBBS Forum
46. Recycling of industrial wastewater containing ethanol - HCBBS Forum
47. Function of the quick shut-off valve on the heat transfer oil expansion tube - HCBBS Forum
48. Excuse me, the concentration of the exhaust gas to be adsorbed is unstable - HCBBS Forum
49. aluminum trichloride - HCBBS Forum
50. Sequence of the PID process flow diagram - HCBBS Forum
51. Relationship between nitrogen dew point and volume - HCBBS Forum
52. How can one’s heart always remain in a state of tranquility and non-action, free from desires and ambitions, and peaceful and serene, just like in Taoism? - HCBBS Forum
53. Which are the well-known domestic manufacturers of pre-filters for advanced treatment of condensate water? - HCBBS Forum
54. How to calculate the design gas volume of a pressure vessel? ? - HCBBS Forum
55. Whether bolts made of different materials will seize at high temperatures - HCBBS Forum
56. Looking for manufacturers of molecular sieve dehydration equipment for organic solvents - HCBBS Forum
57. Polyethylene glycol as an antifoaming agent - HCBBS Forum
58. Do cylinders and their busbars need to be separated by 2 meters? - HCBBS Forum
59. What factors need to be considered in technical bid evaluation? - HCBBS Forum
60. Cooperation in potassium salt flotation production - HCBBS Forum
61. For the adsorption treatment of benzene in exhaust gases, it is necessary to measure the LEL of benzene. Should a FID or a PID be used? What is the difference between the two? - HCBBS Forum
62. How to set the ASPEN shell-side and tube-side property methods separately, as shown in the figure - HCBBS Forum
63. Tianchen Design Institute releases the pressure through blast discs into the atmosphere – is this safe? - HCBBS Forum
64. Calculation of discharge volume under fire conditions - HCBBS Forum
65. When introducing high-pressure, low-temperature NG for the first time, how should the pipeline pressure be increased? - HCBBS Forum
66. In the waste heat boiler, the phosphate level is high while the pH of the boiler water is low. Seeking advice from all the experts! ! ! - HCBBS Forum
67. Regarding multiple organized exhaust gas collection points, what methods can be used to maintain stable levels of exhaust gas volume and concentration collected at each point? - HCBBS Forum
68. I would like to ask about the meaning of some letters in the drawings from Hualu Design Institute - HCBBS Forum
69. What is the problem with severe sludge loss in inclined tube sedimentation tanks? - HCBBS Forum
70. PDF single-line diagram material list extraction - HCBBS Forum
71. LNG cryogenic tank issues - HCBBS Forum
72. There is a section of horizontal pipe with DN400 diameter; what type of pump is suitable for pumping water through it? - HCBBS Forum
73. Water gas drying - HCBBS Forum
74. To stabilize the steam pressure after the valve, is it better to use a self-acting pressure regulator for steam, a pressure reducing valve, or a control valve? - HCBBS Forum
75. On the design calculations for water scrubbers - HCBBS Forum
76. Pneumatic valve INSTRUMENT 1 of BRANCH /PG-14416-250-2J1/B1 – what does this mean? - HCBBS Forum
77. Flow of gas inside a pipe - HCBBS Forum
78. Is 316L material suitable for a 10% ferrous sulfate solution? Can 5% PAC be used with 304 material? They’re all at room temperature - HCBBS Forum
79. How to increase the flow rate of the medium in the pipeline - HCBBS Forum
80. Steam pipe installation - HCBBS Forum
81. I would like to ask everyone how to consult current standards and download them? - HCBBS Forum
82. May I ask, since the pressure in the exhaust gas adsorption tower is between -0.01 and 0.1 MPa, can it be considered a vessel under normal pressure? - HCBBS Forum
83. autoignition point - HCBBS Forum
84. Which expert has the ternary phase diagram of hydrochloric acid, acetic acid, and water? - HCBBS Forum
85. Selection of low-flow pumps - HCBBS Forum
86. Should flexible connections be installed on the inlet and outlet pipes of acid and alkali storage tanks such as hydrochloric acid, sulfuric acid, and liquid caustic? What are the regulatory guidelines for this? - HCBBS Forum
87. Steam depressurization scheme for exhaust gas analysis - HCBBS Forum
88. Height of the safety valve vent pipe - HCBBS Forum
89. Aspen application - HCBBS Forum
90. Could you please tell me how much 1 ton of circulating water and chilled water (including chilled brine) costs at your factory? Indicate the area where it is located - HCBBS Forum
91. Question: What do the letters in the “Piping List” provided by Tianchen Design Institute represent? - HCBBS Forum
92. Distance between the gas holder and the compressor? - HCBBS Forum
93. Why does superheated steam require more energy than saturated steam? - HCBBS Forum
94. Why can’t the gas flow in and out continuously in the pressure swing adsorption nitrogen production process? - HCBBS Forum
95. The blind flange is installed on the other side of the valve where the material comes from; but is this other side located before or after the valve? - HCBBS Forum
96. Are there any simple valves on the large air ducts to regulate airflow, something other than large butterfly valves? - HCBBS Forum
97. When using a diaphragm pump or a screw pump to transfer sludge, what type of safety valve is suitable for installation at the pump outlet? Consider preventing sludge blockage - HCBBS Forum
98. Polydimethyl methoxymethane may see rapid development - HCBBS Forum
99. For a fan selected with a capacity of 5000 m3/h and a wind pressure of 10 kPa, how can one determine what the actual air volume and wind pressure will be? - HCBBS Forum
100. I checked in CAD and my fonts are not missing, but the font still shows a question mark. What could be the reason? - HCBBS Forum