English — Forum #337 (Page 31/163)

1. Discussion on pipeline length procurement - HCBBS Forum
2. What do the welding markings in the diagram mean? - HCBBS Forum
3. I would like to ask whether 30% hydrogen peroxide is classified as Category B or Category C - HCBBS Forum
4. Should thermal expansion valves not be installed on the pipelines in the polymer-based medium storage areas? - HCBBS Forum
5. How do pharmaceutical companies that handle hazardous chemicals define hazardous chemical construction projects? - HCBBS Forum
6. Example 5 on page 62 of the book 《Jet Pump》 (translated by Huang Qiuyun). Using the formula (2-64) given in the book, the PC value I calculated is a little over 9 - HCBBS Forum
7. EDR simulation problems - HCBBS Forum
8. Interlock settings for reciprocating compressors - HCBBS Forum
9. When the procurement team goes to visit suppliers for non-standard equipment, what are the main aspects that need to be examined? The more comprehensive, the better - HCBBS Forum
10. Should the screws on both sides of the flange expose 0 to 3 threads? Is it not okay if there’s too much? - HCBBS Forum
11. Which is better for regulation: a single-seat diaphragm pressure regulator with pressure interlock, or a self-acting pressure regulator? - HCBBS Forum
12. Reward 001: Investigate the list of chemical manufacturing companies – 20,000 Wealth Points + 12,000 Haichuan Points as reward for 【styrene, toluene, etc.】 - HCBBS Forum
13. Welding materials for A335 P11 material - HCBBS Forum
14. Hydrogen-to-carbon ratio of gasoline and diesel - HCBBS Forum
15. Common misconceptions in steam applications - HCBBS Forum
16. Dear forum member, where do the values for the design temperature of the pipes below come from? - HCBBS Forum
17. 5 anti-surge control parameters - HCBBS Forum
18. Are there storage tanks made of FRP/PVC (glass fiber reinforced plastic with a PVC lining)? - HCBBS Forum
19. Can lactic acid and polylactide esters conduct electricity? - HCBBS Forum
20. 15% ammonium chloride, at room temperature, pH 6-9 – can 2205 be used for the pipes? Does the equipment have composite plates made of carbon steel with a titanium lining? - HCBBS Forum
21. May I ask, after *** in exhaust gas is adsorbed by an adsorbent material, can it be desorbed using steam? - HCBBS Forum
22. I’m willing to offer a generous reward – can benzene and styrene storage tanks be placed in the same fire-resistant container? Thank you - HCBBS Forum
23. Should the nitrogen seal valve be installed on top of the storage tank or on the ground? - HCBBS Forum
24. How is this shading effect created in CAD 3D? - HCBBS Forum
25. The tender documents specify several brand requirements; should we mention just one of them in our quote, or all of them? - HCBBS Forum
26. Why are some lines still colored when printing in PDF format using CAD and monochrome.ctb? - HCBBS Forum
27. What Should a Construction Technician Learn to Become a Production Technician in a Chemical Company (3rd Edition) - HCBBS Forum
28. How to increase user group permissions? - HCBBS Forum
29. 【Haichuan Equipment Guessing Game】What is this row of fences for? - HCBBS Forum
30. When preparing technical documentation, the selection and calculation for the exhaust fan in a workshop - HCBBS Forum
31. Average evaporation rate after liquid level changes during kettle evaporation - HCBBS Forum
32. Are there any Class B automated warehouses available in the country currently? - HCBBS Forum
33. The function of an explosion venting tank - HCBBS Forum
34. Help needed: how to connect hydrogen fluoride gas cylinders, please advise experts - HCBBS Forum
35. Ningxia chemical enterprises are seeking skilled professionals - HCBBS Forum
36. For organic waste gas pipelines with a flow rate of 350 cubic meters per hour, should the pipe flame arrester be DN150 or DN125? - HCBBS Forum
37. Is it required by the specifications for a safety valve to have this drain pipe installed? - HCBBS Forum
38. Regarding the issue of measuring steam and liquids with differential pressure flowmeters? - HCBBS Forum
39. I would like to ask: if a project follows all the regulations at every stage, from the initial planning phase through to completion, what complete procedures and formalities are required? - HCBBS Forum
40. Is there any logic or principle behind determining the placement of different levels in a PID pipeline? - HCBBS Forum
41. Is the amount of steam produced by the boiler at 3.5 Mpa the same as that at 1.0 Mpa? - HCBBS Forum
42. Can plug valves and baffle valves be used in waste gas adsorption and steam desorption applications? - HCBBS Forum
43. Aspen simulates the CO2-saturated water content; why is there a large discrepancy between the calculated values and those from HYSYS? - HCBBS Forum
44. Request the electrical heating process flow diagram for storage tanks - HCBBS Forum
45. Can plate heat exchangers be used to heat flammable liquids of categories A and B? - HCBBS Forum
46. Calorific value calculation - HCBBS Forum
47. How to prevent liquid caustic from crystallizing in winter - HCBBS Forum
48. How can on-site construction plans and design drawings be seamlessly integrated? - HCBBS Forum
49. How does a pH meter installed on a pipeline prevent damage caused by rapid flow and impact from particles? - HCBBS Forum
50. Continuous production process for boron trifluoride - HCBBS Forum
51. Advantages of insulation jackets for plate heat exchangers - HCBBS Forum
52. Is 100% non-destructive testing required for gold welds? - HCBBS Forum
53. I am currently working in the field of welding processes. Are there any certificates I can obtain? - HCBBS Forum
54. Can the as-built drawings issued by the construction unit for on-site changes to pressure pipelines substitute for design changes made by the design unit? - HCBBS Forum
55. Searching for suppliers of advanced ammonia synthesis technology packages - HCBBS Forum
56. Air separation air precooler - HCBBS Forum
57. In what situations is it necessary to install a handwheel on a pneumatic valve? According to the specifications - HCBBS Forum
58. One-pass conversion rate of CO in methanol synthesis - HCBBS Forum
59. Seeking help from experts regarding the determination of the conversion rate of water-soluble solvents using liquid chromatography - HCBBS Forum
60. What should be noted when using nitrogen for desorption after VOC adsorption? How much nitrogen is required? - HCBBS Forum
61. What Should a Construction Technician Learn to Become a Production Technician in a Chemical Company (2nd Edition) - HCBBS Forum
62. Is the flange of a 40-kilogram valve concave or RF? - HCBBS Forum
63. Why are the pipe diameter classification series in GB/T17395 and GB/T20592 inconsistent? - HCBBS Forum
64. Gas cylinder warehouse - HCBBS Forum
65. Are there any manufacturers that produce small-scale crystallizers? - HCBBS Forum
66. Under what circumstances is it not necessary to install a circulation pool at the circulating water station? - HCBBS Forum
67. Can welded steel pipes be used for compressed air pipelines? - HCBBS Forum
68. What is the purpose of this type of pipeline? - HCBBS Forum
69. There is a lot of bubbling in the sight glass of the top-product pipeline in the reduced-pressure distillation - HCBBS Forum
70. Problems with plate and frame filter presses - HCBBS Forum
71. Which are the top 20 chemical companies? - HCBBS Forum
72. Can saline substances be stripped out in a stripping tower? - HCBBS Forum
73. I have an unused senior chemical engineering degree - HCBBS Forum
74. Can an Class A device (similar to a complete set of equipment) be used to house explosion-proof electrical equipment and control cabinets? Is this compliant? - HCBBS Forum
75. How to calculate or simulate the saturated water content in industrial gases - HCBBS Forum
76. Is there any good way to prevent the packing material inside outdoor towers from being damaged by freezing when it isn’t in use for long periods of time? - HCBBS Forum
77. May I ask, for a 30-cubic-meter methanol storage tank, how many level gauges are required according to the specifications? - HCBBS Forum
78. Flammable/toxic detector settings - HCBBS Forum
79. Fire separation requirements between Class C warehouses and other important facilities throughout the plant - HCBBS Forum
80. What do you need to know to work in craftsmanship? - HCBBS Forum
81. Process flow simulation for the liquid-phase synthesis of dimethyl carbonate from methanol - HCBBS Forum
82. Foreign design drawing annotations - HCBBS Forum
83. Regarding skid-mounted equipment transported by ordinary (non-specialized) means, what is the maximum width allowed? What is the maximum height? What about the length? - HCBBS Forum
84. Which is better for piping design, PDSOFT or PLANT 3D – in terms of usability and aesthetics? - HCBBS Forum
85. May I ask whether a finned heat exchanger can be used to cool toluene waste gas at 200,000 mg/m3 using chilled water at -25 degrees Celsius? - HCBBS Forum
86. In what situations cannot plate heat exchangers be used? Can a plate heat exchanger gasket withstand temperatures over 300 degrees? - HCBBS Forum
87. 200,000 tons of EVA production starts up - HCBBS Forum
88. Which specification specifies the quality certification document for pressure vessel installation? - HCBBS Forum
89. Who has the job responsibilities and assessment forms for different positions in a chemical plant? - HCBBS Forum
90. Distillation column design - HCBBS Forum
91. Are there any centrifugal fans with a flow rate of 500 and a pressure of 15 kPa? One with a lower calorie count? - HCBBS Forum
92. Fire-resistant materials for steel structures - HCBBS Forum
93. Seeking technical personnel for the production of thionyl chloride via the sulfur dioxide method - HCBBS Forum
94. What type of safety valve should be used on the pipelines for solidified sludge? Slurry - HCBBS Forum
95. Operating Procedures for Heat Transfer Oil - HCBBS Forum
96. How to write a risk control document for a wastewater treatment project? What aspects are included? Is there a reference? - HCBBS Forum
97. Are there any spacing requirements for the Class A liquid intermediate tank area attached to a Class A factory building? - HCBBS Forum
98. Is there any honeycomb on the internal floating roof? - HCBBS Forum
99. Question! Is it necessary to install a superheater in high-pressure gas boilers with low evaporation rates? - HCBBS Forum
100. Why is the liquid phase sprayed into the gas phase of the heat exchanger? - HCBBS Forum