English — Forum #723 (Page 293/642)

1. How to conduct experiments on the addition amounts of PAC and PAM - HCBBS Forum
2. Regarding the issue of inaccurate measurement of liquid ammonia! - HCBBS Forum
3. May I ask if the methanol in a atmospheric-pressure storage tank needs to be heated, and is it okay to heat it to 40 degrees? Is it because the flash point is only around 10 degrees? Urgent! Urgent! Urgent! Urgent! ! ! - HCBBS Forum
4. Sign-in record post from April 21, 2016 - HCBBS Forum
5. Is the hydrogen sulfide concentration tower required to be 7 meters above the ground level? - HCBBS Forum
6. Is it better to use a self-priming pump or an submersible pump for underground amine liquid tanks? - HCBBS Forum
7. Is a Certified Automation Systems Engineer certificate useful? - HCBBS Forum
8. 【Daily Question No. 119】April 12, 2016: +2 wealth for participation, +3 wealth for a correct answer - HCBBS Forum
9. What are some convenient and useful methods and tools for doing housework? - HCBBS Forum
10. When using Aspen to simulate atmospheric and vacuum distillation, how can one determine the heat furnace losses in the results? - HCBBS Forum
11. Online replacement of ceramic balls in sand filter towers for maintenance - HCBBS Forum
12. Who has the Chinese version of API571-2003? Please share it - HCBBS Forum
13. Looking for drawings for a toothed quick-opening door. (It’s best to have part drawings) - HCBBS Forum
14. caesae three-way input - HCBBS Forum
15. 【Chemical Industry News】Seeking production technologies for styrene and dimethyl carbonate - HCBBS Forum
16. One question per day; those who answer correctly receive 5 wealth points, and those who participate receive 2 wealth points； Question 284 - HCBBS Forum
17. One Question per Day on Synthetic Ammonia (Series 71) - HCBBS Forum
18. I would like to ask the seniors about the large-scale hydrogen production cycle - HCBBS Forum
19. Catalyst ceramic ball packing issue - HCBBS Forum
20. 【Daily Topic】【Civil Engineering Version 20160404】 - HCBBS Forum
21. Doing a graduation project on heat exchangers - HCBBS Forum
22. Solenoid valve cable - HCBBS Forum
23. Wellhead device fluid sampler? - HCBBS Forum
24. 【Daily Topic】【Electrical Edition 20160420】 - HCBBS Forum
25. “The Shop of HaiChuan Irrigation Co., Ltd.” 321 – If you’re not happy, take a look - HCBBS Forum
26. Shielded pump weight estimation - HCBBS Forum
27. Recommended flow rate for low-temperature liquid propane - HCBBS Forum
28. Is it necessary to install temperature sensors in the coal slurry pipeline of the water-coal slurry gasification system at the furnace head section? - HCBBS Forum
29. Records regarding the inspection of centrifugal pump operation - HCBBS Forum
30. Where can I find a reference table for the freezing point of ammonium nitrate solutions? - HCBBS Forum
31. Buried Class A intermediate tank in a Class A factory building - HCBBS Forum
32. Direct olefin production from coal gasification (the end of coal-to-methanol and methanol-to-olefins processes) - HCBBS Forum
33. National V diesel hydrogenation - HCBBS Forum
34. The impact of variable-frequency motors on air valves in reciprocating compressors - HCBBS Forum
35. Pay 300 to pass the professional English exam? Don’t listen to the scammers’ nonsense! - HCBBS Forum
36. When calculating the reaction forces at the saddle support, which masses are included in the total mass of the heat exchanger? - HCBBS Forum
37. Are there any standards or specifications regarding dehydrogenation treatment? - HCBBS Forum
38. One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 494 - HCBBS Forum
39. How is the design pressure of a boiler drum generally determined? - HCBBS Forum
40. Which dew point meter for moisture in air is better? Looking for recommendations! - HCBBS Forum
41. It’s been 8 years at work – is it still too late to rethink my career? - HCBBS Forum
42. It’s so annoying - HCBBS Forum
43. The question regarding the as-built drawings for pipelines is: do as-built drawings need to be prepared for the pipeline schematic diagrams as well? - HCBBS Forum
44. How does a water supply system work? - HCBBS Forum
45. Are there any requirements regarding work experience for the Public Foundation and Professional Foundation exams in the registration process? - HCBBS Forum
46. 【Daily Question】 2016-04-14 Hydrogenation Sector Multiple Choice - HCBBS Forum
47. Fire hazard rating of zinc powder - HCBBS Forum
48. 【Weekly Topic】【Storage & Transportation Version 20160412】 - HCBBS Forum
49. I would like to ask whether fiberglass-reinforced plastic pipes can be used in toluene media - HCBBS Forum
50. How is hydrogen and carbon monoxide separated in the coal-based ethylene glycol production process? - HCBBS Forum
51. 【Daily Question】Deep Processing 20160422 Multiple Choice: Which of the following statements is NOT a characteristic of a catalyst? ( ) - HCBBS Forum
52. Changzhou, Jiangsu responds to school pollution incident: Monitoring levels are within limits; only 4 people took sick leave - HCBBS Forum
53. 【How Much Do You Know About Skill Experts?】Understanding the \"uncipherable text\" of acetylene technology with just a junior high education level like 007" - HCBBS Forum
54. Nitrogen pipeline - HCBBS Forum
55. A/O: The dissolved oxygen level in the aerobic tank is too high (8 mg/l); is it possible to use intermittent aeration? - HCBBS Forum
56. What does it mean when the output of a pressure transmitter is greater than 20.6 mA? And what does it mean when it is less than 3.6 mA? - HCBBS Forum
57. Tubular heating furnace - HCBBS Forum
58. 【Daily Question】Chemical Engineering Principles 361: Cation Exchange Resins (April 14) - HCBBS Forum
59. Which chemical process generates 10% waste sulfuric acid? - HCBBS Forum
60. Catalyst poisoning in methanol synthesis - HCBBS Forum
61. A question of responsibility - HCBBS Forum
62. Orifice throttling for pressure reduction - HCBBS Forum
63. How was it partitioned? - HCBBS Forum
64. What are the measures to reduce ammonia nitrogen emissions? - HCBBS Forum
65. P3D level library issues - HCBBS Forum
66. Inconel 625 shrapnel heat resistance - HCBBS Forum
67. JB/T 4730.3-2005 Non-destructive testing of pressure equipment - HCBBS Forum
68. Valve stem length - HCBBS Forum
69. I would like to ask experts in compressors about the issue of motor vibration - HCBBS Forum
70. Design and layout issues of container supports - HCBBS Forum
71. What causes the medium at the bottom of the methanol-to-hydrogen vaporization tower to turn red? - HCBBS Forum
72. 【Daily Topic】【Civil Engineering Version 20160405】 - HCBBS Forum
73. What does “forbid-directional control communication” mean? - HCBBS Forum
74. How is the burner cooling water pump tested for automatic start-up interlock? - HCBBS Forum
75. Analysis of accident cases - HCBBS Forum
76. How to test the inner tube of a jacket? Urgent! Urgent! Urgent! - HCBBS Forum
77. 【Daily Question】Advanced Processing 20160419 Multiple Choice: There are ( ) two types of catalyst poisoning - HCBBS Forum
78. Insulation of the outer wall of gasoline storage tanks in the oil storage and transportation tank area - HCBBS Forum
79. Valve repair - HCBBS Forum
80. In pipeline installation work, does knowing the welding Dyne factor allow one to calculate the consumption quota for welding materials? - HCBBS Forum
81. Alkylation - HCBBS Forum
82. Normal startup, shutdown procedures, and emergency shutdown procedures for the low-temperature methanol wash cycle gas compressor? - HCBBS Forum
83. Superiors require the windows to be cleaned~~~~~~~~~~~ - HCBBS Forum
84. Methods for aligning and centering the coupling between the water pump and the motor - HCBBS Forum
85. Inventory of new methanol production facilities in the next two years - HCBBS Forum
86. Jet air flotation - HCBBS Forum
87. Were the syllabuses for the professional registration exams in 2014 changed? Were the review materials also altered? So what should be purchased now... - HCBBS Forum
88. Portable environmental protection sandblaster - HCBBS Forum
89. Shaanxi Tianhong - HCBBS Forum
90. Sign-in record post from April 20, 2016 - HCBBS Forum
91. Classification of designs - HCBBS Forum
92. Synthesis of trimethylheptyne - HCBBS Forum
93. Upgrade to the premium version to spend money & bring good luck to TXX - HCBBS Forum
94. On-site instrument installation - HCBBS Forum
95. 【Daily Topic】【Production Version 20160419】 - HCBBS Forum
96. What affects the air delivery volume of a compressor? - HCBBS Forum
97. Regarding the size of the discharge port - HCBBS Forum
98. Request an animation demonstration of the rotation compensator in action - HCBBS Forum
99. Special offer: \"Pressure Pipeline Design and Engineering Examples\" (2nd edition) is available for free - HCBBS Forum
100. How else can dissolved oxygen be understood? Molecular oxygen in the air dissolves in water; is the dissolved oxygen level higher at lower temperatures? Could you give me a pass... - HCBBS Forum