English — Forum #723 (Page 488/642)

1. Inner Mongolia Yili ethylene glycol plant (300,000 tons/year) successfully commissioned - HCBBS Forum
2. High vibration in multi-stage centrifugal pump water pumps? ? - HCBBS Forum
3. The refined oil pricing mechanism isn’t working – how should local refineries set their oil prices? - HCBBS Forum
4. Project prospects - HCBBS Forum
5. Is a new process evaluation required for single-sided welding with double-sided formation? - HCBBS Forum
6. Profits from downstream products of propylene - HCBBS Forum
7. How can the trust crisis in environmental monitoring be resolved? - HCBBS Forum
8. Why are the holes in a trough distributor designed to be V-shaped? Instead of square or round? - HCBBS Forum
9. Selection of plate grade for the flat tube sheet of boiler WNS2-1.0-Y - HCBBS Forum
10. Restructuring Training True or False Questions - HCBBS Forum
11. How to isolate, activate a safety valve, and what are the precautions? - HCBBS Forum
12. Do you know the main difference between Maocai and spicy hot pot? - HCBBS Forum
13. How much screw oil should be added to a screw air compressor? - HCBBS Forum
14. Self-priming height of pneumatic diaphragm pump - HCBBS Forum
15. How can I increase my wealth value? - HCBBS Forum
16. How to compress PPT files (images remain large even after compression) - HCBBS Forum
17. Treatment of wastewater with high COD and high ammonia nitrogen levels - HCBBS Forum
18. Why aren’t industry standard downloads free in China? - HCBBS Forum
19. Weekly topic: 5 wealth points for those who answer correctly, 2 wealth points for those who participate； Question 198 - HCBBS Forum
20. Is the sugar used in sugar-coated haws white sugar or rock sugar? - HCBBS Forum
21. 【Daily Question】10.24 True or False: The characteristic of paraffin-based crude oil is (Reply with +2 for rewards) - HCBBS Forum
22. Steam flow measurement problem - HCBBS Forum
23. Sign-in record post from October 25, 2015 - HCBBS Forum
24. Example 1.2.5-3 on page P33 of the SIA textbook - HCBBS Forum
25. Request for coal chemical industry monthly report - HCBBS Forum
26. Calculations regarding flow restriction orifice plates - HCBBS Forum
27. Welding process issues for 200mm carbon steel plates - HCBBS Forum
28. Pump coaxiality - HCBBS Forum
29. Black diesel refining - HCBBS Forum
30. What are the common defects in tower-type equipment? - HCBBS Forum
31. Mass flow meter - HCBBS Forum
32. Weekly Review of Alkylated Oils: (20151016-1022) - HCBBS Forum
33. Insulation construction drawings for the equipment - HCBBS Forum
34. Who should be responsible for the re-inspection of the granite materials used for floor anti-corrosion? - HCBBS Forum
35. How to soften PVC recycled pellets? - HCBBS Forum
36. What are the requirements for water quality when using biochemical methods to treat wastewater? - HCBBS Forum
37. Northeastern regional refinery naphtha undergoes a \"transformation\"” - HCBBS Forum
38. Software for contractor management – has anyone used it? I recommend a useful one. - HCBBS Forum
39. The containers weren’t sold and remained unused for a few years; can they still be sold? What procedures are needed? - HCBBS Forum
40. Automatic level control is achieved through variable frequency operation of the outlet pump - HCBBS Forum
41. Main air supply interrupted - HCBBS Forum
42. Dear sea friends, please come and assess the hot work - HCBBS Forum
43. As winter arrives and temperatures drop, what will happen to all Na2SO4-saturated sealing fluids? How to solve it? - HCBBS Forum
44. Environmental Protection Daily Quiz: October 25 – Participate for prizes; 3 correct answers earn an additional prize - HCBBS Forum
45. Refinery translation reports - HCBBS Forum
46. Analyze the characteristics of the wet phosphoric acid cleaning process. - HCBBS Forum
47. What is safety value engineering? - HCBBS Forum
48. The sharpest weapon of family affection - HCBBS Forum
49. JB4732-1995 (2005) - HCBBS Forum
50. What is eutrophication pollution? - HCBBS Forum
51. Common compressor failures and solutions - HCBBS Forum
52. 【Daily Question】October 21, 2015 – Non-destructive testing (2 wealth points for replying; +3 to +8 wealth points if the answer is correct) - HCBBS Forum
53. Do the laboratory facilities in the oil and petrochemical industry need to be explosion-proof? - HCBBS Forum
54. Chemical engineering design consulting services - HCBBS Forum
55. Help with the reduction equation for iron powder - HCBBS Forum
56. If there are points, why can’t I download it? - HCBBS Forum
57. 【Daily Question】Question from Issue 20151020 - HCBBS Forum
58. The tank body is made of Q245R+0Cr13Al composite steel; cracks have now appeared in the circumferential weld of the head – how should this be repaired? - HCBBS Forum
59. What is the relationship between the oxidizing power of concentrated sulfuric acid and its concentration? - HCBBS Forum
60. Seeking advice on the reason for the low outlet temperature of the regenerator in lithium bromide refrigerators - HCBBS Forum
61. What instrument is good for measuring gas flow? - HCBBS Forum
62. Should the rotor be turned after the new hydrogen compressor is shut down? - HCBBS Forum
63. What bearing is F209? - HCBBS Forum
64. Urgently need recommendations for 130 t/h gas boilers (multiple units are acceptable) - HCBBS Forum
65. Domestic chemical industry instruments - HCBBS Forum
66. Material issues in nitrile rubber gaskets - HCBBS Forum
67. How to choose the bearing model for a pump - HCBBS Forum
68. Question 72 on Boiler Foundations, October 25: (A certain score will be given to the top 40) - HCBBS Forum
69. High-pressure heater - HCBBS Forum
70. Environmental Protection Daily Quiz 10.22: Participate for prizes; 3 correct answers earn an additional prize of 2 - HCBBS Forum
71. Briefly describe the low-pressure methanol synthesis process. . . . - HCBBS Forum
72. Please help translate it - HCBBS Forum
73. Looking for on-site photos of hydrocracking reactors. - HCBBS Forum
74. It’s a simple question; I’m a beginner, please help - HCBBS Forum
75. What material is used for 97%*ao acid? - HCBBS Forum
76. The CWL-M type centrifugal extractor is used, together with traditional Chinese medicine extraction techniques, to extract extracts from the Ranunculaceae plant Paeonia lactiflora - HCBBS Forum
77. Are double valves, blind plates, or pipe caps required for the venting of oil pipelines in refineries? Are there any guidelines? - HCBBS Forum
78. One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 343 - HCBBS Forum
79. How to extinguish fires involving oils and organic solvents - HCBBS Forum
80. Regarding pump selection - HCBBS Forum
81. Who can help me solve the problem of balancing axial forces in multi-stage centrifugal pumps? - HCBBS Forum
82. Water seal tank structure of acidic water tank - HCBBS Forum
83. What are the factors that affect prediction accuracy? - HCBBS Forum
84. What factors should be considered when choosing a sampling method - HCBBS Forum
85. What are the differences in operation between a pneumatic diaphragm pump and a regular centrifugal pump? - HCBBS Forum
86. What is security planning? How do you understand it? - HCBBS Forum
87. The effect of dust-containing gas media on the heat exchange tubes in waste boilers - HCBBS Forum
88. Mantoux turbine air compressor flow diagram - HCBBS Forum
89. Pressure Vessel Design Approver Exam Questions - HCBBS Forum
90. Why is it said that a reducing check valve can be used to lower the height of the pump outlet isolation valve? - HCBBS Forum
91. I need an article on instrument maintenance for internal company distribution. - HCBBS Forum
92. Regarding the commissioning purging of the hydrogenation unit. - HCBBS Forum
93. New technologies for methanol conversion gas - HCBBS Forum
94. How to coordinate the initial commissioning of the additional hydrogen production unit - HCBBS Forum
95. 【Daily Question】Question from Issue 20151019 - HCBBS Forum
96. 【Daily Question】Question 23: Test question from issue 20151020 (Repeat +2)； For the other +3) - HCBBS Forum
97. 【Daily Question】Principles of Chemical Engineering 211: Fluids (October 23) - HCBBS Forum
98. Information on submersible pumps - HCBBS Forum
99. The analysis results for Coulomb chlorine in the same sample are getting lower and lower - HCBBS Forum
100. Is it reliable to use graphite self-adhesive tape for biconical seals? - HCBBS Forum