English — Forum #723 (Page 386/642)

1. Determination of the spiral rotation direction - HCBBS Forum
2. For catalytic fresh and regenerated slide valve passages, is steam or air commonly used? - HCBBS Forum
3. 【Daily Question】1.17 Metal corrosion rate (3 wealth points for replies; +3 to +8 wealth points for correct answers) - HCBBS Forum
4. Scope of supply for pump units in the quotation process - HCBBS Forum
5. Haichuan “Gratitude Season” – Lifetime Master 【Mechanical 005】 - HCBBS Forum
6. Issues related to the recycling of first-stage concentrated water from secondary reverse osmosis and softened water/reclaimed water - HCBBS Forum
7. Selection of surfacing material - HCBBS Forum
8. The critical speed issue of Hangzhou Motor Vehicles - HCBBS Forum
9. I want to see what love looks like! - HCBBS Forum
10. Inquire about the price of metal rotor remote transmission flow meters - HCBBS Forum
11. What does a hollow-stage impeller refer to in API610? - HCBBS Forum
12. Why does the effluent from the biological secondary sedimentation tank contain some sludge, and why can’t PAM be used to form flocs? - HCBBS Forum
13. 【Daily Question】1/16/2016: Participation +2 Wealth； +3 to 8 wealth for correct answers - HCBBS Forum
14. I would like to ask the experts on this forum a question regarding ASME Low Temperature UCS66 - HCBBS Forum
15. Does the central control computer display the on-site instruments as nan? - HCBBS Forum
16. Fluctuations in nitrogen content in natural gas produced from coke oven gas - HCBBS Forum
17. 20130123 One question per day - HCBBS Forum
18. Design of atmospheric pressure storage tanks - HCBBS Forum
19. Uses of belt and chain conveyors - HCBBS Forum
20. Process Engineer & Procurement Engineer Selection - HCBBS Forum
21. Issues related to the evaluation of intermediate professional titles in mechanical engineering in Shandong - HCBBS Forum
22. What does the M after API600M and API602M mean? - HCBBS Forum
23. Regarding the backflow issue in multi-stage pumps and high-speed pumps - HCBBS Forum
24. Should I take the CPA exam? - HCBBS Forum
25. Which journals are commonly used for publishing papers on instrumentation? I seek recommendations from those with more experience! - HCBBS Forum
26. Freezing inside the pressure tap tube - HCBBS Forum
27. Urgent! J41H-16P globe valve: Does 16P mean 1.6 MPa? - HCBBS Forum
28. Does anyone have the PID for a dichloromethane storage tank? - HCBBS Forum
29. Regarding the catalyst issue for producing LNG from coke oven gas! ! ! - HCBBS Forum
30. Issues regarding water content in the propylene cryogenic station system - HCBBS Forum
31. Under what conditions will the computer in the control room display “Nan” for the on-site instruments? - HCBBS Forum
32. The electric ball valve at the bottom of the naphtha storage tank has frozen - HCBBS Forum
33. For DCS drive motors, is it better to use single drive (ON for operation, OFF for stop), or dual drive (one pulse for operation, one pulse for stop)? - HCBBS Forum
34. Changes in load, as well as changes in pressure and temperature. - HCBBS Forum
35. 【Daily Question No. 100】January 19, 2016: +2 wealth for participation, +3 wealth for a correct answer - HCBBS Forum
36. Calculation of fan efficiency, pressure ratio, and flow rate after changing the medium - HCBBS Forum
37. What are the differences between imported catalysts and domestically produced catalysts for the Claus unit and exhaust gas treatment units in sulfur recovery? - HCBBS Forum
38. Main fan outlet silencer - HCBBS Forum
39. crank the shaft - HCBBS Forum
40. What are the causes of wear on the motor end cover of the polymerization reactor? - HCBBS Forum
41. I hope everyone can recommend a good desktop dictionary - HCBBS Forum
42. Is factory inspection mandatory? - HCBBS Forum
43. How to choose bolts and nuts? - HCBBS Forum
44. 【Daily Question】1.19 Multiple-choice question: The process by which solvents absorb H2S and CO2 is ( ) - HCBBS Forum
45. 【Daily Question】1.22 Multiple-choice question: The process by which a substance changes directly from a solid state to a gas state is called ( ). (Extra reward as the New Year approaches) - HCBBS Forum
46. Under the same conditions, if the flow meter is changed from DN50 to DN80, by how much can the flow velocity increase? - HCBBS Forum
47. What are the different types of sanitary connections for instruments? - HCBBS Forum
48. 【Daily Question】 January 19: The octane number of gasoline produced through catalytic cracking is higher than that of straight-run gasoline (), while the cetane number of diesel is higher than that of straight-run... - HCBBS Forum
49. When treating wastewater with ferric sulfate polymer solution, why do the flocs float to the surface after they form? - HCBBS Forum
50. Explosive limit test - HCBBS Forum
51. Fire hazard of potassium permanganate - HCBBS Forum
52. PDMS - HCBBS Forum
53. Emergency response - HCBBS Forum
54. The New Year has arrived; I’m looking for a pair of Spring couplets - HCBBS Forum
55. What are everyone’s thoughts on diesel hydrogenation (with dewaxing) and the optimization of atmospheric pressure units to reduce the amount of hydrotreated naphtha used? - HCBBS Forum
56. Regarding quality awareness - HCBBS Forum
57. Outer wall temperature of the gasifier - HCBBS Forum
58. 【Daily Topic】【Electrical Edition 20160113】 - HCBBS Forum
59. Exchange instrument drawings - HCBBS Forum
60. How to use air compressors safely and properly? - HCBBS Forum
61. I have the CAD version of the instrument drawings and would like to exchange them with colleagues - HCBBS Forum
62. May I ask which is better, having pumps connected in parallel or using a single pump? - HCBBS Forum
63. Help: Improve work efficiency and remove reposts - HCBBS Forum
64. Questions regarding the carbon fiber-based wastewater treatment process - HCBBS Forum
65. 【Daily Question】January 19, 2016: Separate a gas mixture using a packed absorption tower (first 50 replies + 2 points; additional 3–8 points for correct answers) - HCBBS Forum
66. **Advanced technologies and equipment for the clean and efficient utilization of coal proposed by the Energy Bureau - HCBBS Forum
67. Is the layout feature useful? - HCBBS Forum
68. I need a gas alarm system for a 4350D coke oven, mainly for the basement. Or simple design drawings will work too - HCBBS Forum
69. The length of the level gauge installed directly on the equipment does not match the length of the opening provided in the equipment - HCBBS Forum
70. Online analyzer for oxygen content in steam - HCBBS Forum
71. Gasoline dry point - HCBBS Forum
72. How to fix the issue where medals don’t appear - HCBBS Forum
73. 【Joint Study*】【Civil Engineering Version 20160116】 - HCBBS Forum
74. Falling film evaporator - HCBBS Forum
75. Regarding the issue of spacing between underground pipelines - HCBBS Forum
76. Have you used copper tube clamps for liquid chlorine cylinders? - HCBBS Forum
77. Tetramethylbenzene - HCBBS Forum
78. Seeking information on barrel bag pumps - HCBBS Forum
79. Looking for beginner-level materials related to ASPEN - HCBBS Forum
80. Do the flame arresters before the natural gas vent flare need to be inspected regularly? - HCBBS Forum
81. How does one apply for a patent for an individual process? - HCBBS Forum
82. Regarding the types of valves on flue gas pipelines - HCBBS Forum
83. 【Daily Question No. 68】January 18, 2016: +2 wealth for participation, +3 wealth for a correct answer - HCBBS Forum
84. 【Weekly Topic】【HVAC Edition 20160118】 - HCBBS Forum
85. Centrifugal pump doesn’t deliver flow – request help for analysis - HCBBS Forum
86. What is the value of the cast steel quality coefficient? Does anyone who knows know it? - HCBBS Forum
87. Diesel heat supply hydrogenation - HCBBS Forum
88. Identification of hazard sources related to continuous reforming and gasoline separation - HCBBS Forum
89. Datang and Judian Energy sign a cooperation agreement on blue gas technology - HCBBS Forum
90. Ammonia process electrodialytic lead production - HCBBS Forum
91. One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 418 - HCBBS Forum
92. Why can’t I reply to posts - HCBBS Forum
93. Jinyuan football: a dead end - HCBBS Forum
94. Fire protection design issues in the petrochemical industry - HCBBS Forum
95. The traditional oil refining and chemical industries are undergoing transformation; how can instrument control professionals maintain a clear mind in the face of this change? - HCBBS Forum
96. How to decide whether to use a 30-mesh or 40-mesh pre-pump filter? - HCBBS Forum
97. Storage of original records? - HCBBS Forum
98. After using a computer for a long time, it’s time to clean up the junk. - HCBBS Forum
99. 【Daily Question】January 21, 2016: Static and dynamic liquid holding capacity of fillers (first 50 replies + 2 points; additional 3–8 points for correct answers). - HCBBS Forum
100. How should the speed of the motor attached to the pump be selected? - HCBBS Forum