English — Forum #276 (Page 16/145)

1. Regarding the new version of GB/T4732.6: is it necessary to conduct 100% ultrasonic testing on Class D welds with a result of ≤80? - HCBBS Forum
2. Does anyone know if there are any standards or specifications for flanged ribbed plates? - HCBBS Forum
3. Should the dual prevention mechanism for special equipment and the system of daily management and weekly inspections be implemented together? ! - HCBBS Forum
4. Seeking advice - HCBBS Forum
5. Regulations on the Management of Handover Documents - HCBBS Forum
6. Function and selection of safety valves - HCBBS Forum
7. Cleaning of heat exchangers - HCBBS Forum
8. Compressor vibration measurement technology and its applications - HCBBS Forum
9. Soft seal and hard seal for butterfly valves - HCBBS Forum
10. The work of plugging leaks under pressure done over those years - HCBBS Forum
11. Top domestic brands of electromagnetic flowmeters - HCBBS Forum
12. What is a disturbance-free quick switch device? What is the principle of the disturbance-free quick switching device? What are the functions of a disturbance-free quick switching device? - HCBBS Forum
13. Magnetic deflection in welding and countermeasures - HCBBS Forum
14. Calculation of the weight of chemical equipment components – New version - HCBBS Forum
15. On which drawings should the completion stamp for industrial pipeline installation be applied? Is it necessary to apply it on any drawings other than the general plan? - HCBBS Forum
16. Safety-related standards and specifications to be implemented starting in January 2025 - HCBBS Forum
17. 【Ten Years of Rapid Development in Chemical Equipment】2052–2024: Domestic patents – Beifang Huajin’s 300,000-ton/year propylene oxide plant’s epoxidation reactor - HCBBS Forum
18. Ten common misconceptions about special equipment - HCBBS Forum
19. Answer regarding the thickness of blast discs - HCBBS Forum
20. Strength calculation of grid support plates - HCBBS Forum
21. Analysis of the key challenges in equipment maintenance and corresponding countermeasures - HCBBS Forum
22. Material re-inspection - HCBBS Forum
23. How to select the material for pure oxygen storage tanks? - HCBBS Forum
24. Why is the wall thickness in the circumferential direction of seamless steel pipes inconsistent, and sometimes the difference is quite large? - HCBBS Forum
25. How to perform strength calculations for a column with a jacketed bottom using SW6? - HCBBS Forum
26. Comprehensive Guide to Low-Temperature Pressure Vessel Design: From Temperature Calculations to Quality Inspection - HCBBS Forum
27. Welding Symbols and Standard Methods (Latest) - HCBBS Forum
28. Why, for the same overall plate + flange connection structure, is the tube sheet much thinner than the equipment flange, while the flange cover and the flange have similar thicknesses? - HCBBS Forum
29. How should gas-liquid mixing tests be conducted for large containers such as spherical tanks? - HCBBS Forum
30. Requirements for horizontal container supports - HCBBS Forum
31. The voltage withstanding test passed, but there is still a possibility that the leakage test will fail - HCBBS Forum
32. The relationship between alkalinity and pH - HCBBS Forum
33. Regarding stainless steel weld evaluation coverage - HCBBS Forum
34. Why is it necessary to reduce the pressure in the steam system? - HCBBS Forum
35. Experience in emergency repair of the omega seal ring for a hydrogenation heat exchanger at a certain company - HCBBS Forum
36. How are the magnitude and direction of the pipe forces determined in the overall calculated load of the SW6 tower? - HCBBS Forum
37. Huali Sealing: Better solution to the problems of leakage and shaft wear in mechanical bearings - HCBBS Forum
38. Sinopec’s “Automatic Welding Technology for Longitudinal Seams in LNG Storage Tanks” won the Science and Technology Progress Award - HCBBS Forum
39. Is root cleaning from the back side by carbon arc gas gouging considered part of the groove preparation? - HCBBS Forum
40. Stirring technology for gas-liquid-solid three-phase systems - HCBBS Forum
41. **Standards for pipeline design - HCBBS Forum
42. Working principle and characteristics of electrostatic oil spill alarms. - HCBBS Forum
43. Why is the size of the pump suction pipe usually one size larger than that of the pump connection? - HCBBS Forum
44. Difference between PFA and PTFE - HCBBS Forum
45. Application conditions for 904L stainless steel - HCBBS Forum
46. 10 reasons for excessive pump vibration - HCBBS Forum
47. Why shouldn’t the temperature difference between the upper and lower cylinders of a steam turbine exceed 50°C? - HCBBS Forum
48. Key points of knowledge on pressure vessels - HCBBS Forum
49. Standard Specifications for Emergency Pressure Relief Manholes - HCBBS Forum
50. Accuracy of pressure gauge - HCBBS Forum
51. Requirements for the length of heat exchanger shell sections - HCBBS Forum
52. Preparation and review of pressure vessel quality plans - HCBBS Forum
53. Connection of heat exchange tubes to tube sheets: expansion first then welding, or welding first then expansion - HCBBS Forum
54. The important functions of steam traps - HCBBS Forum
55. Rockwell hardness - HCBBS Forum
56. Surface roughness that can be achieved with different processing methods - HCBBS Forum
57. The main methods of flow regulation in centrifugal pumps - HCBBS Forum
58. 【Ten Years of Rapid Development in Chemical Processing Equipment】Two products, the “40-foot liquid helium tank” and the “100-cubic-meter fixed horizontal high-vacuum multi-layer insulated liquid hydrogen storage tank”, have passed the appraisal for 2023–2025 - HCBBS Forum
59. Definition of Class D weld thickness for the takeover and shell - HCBBS Forum
60. Caustic embrittlement of steel - HCBBS Forum
61. Types of heat exchanger scaling - HCBBS Forum
62. Guide to Optimizing Valve Selection in Chemical Production - HCBBS Forum
63. When should thread milling be used instead of tapping to create threads? - HCBBS Forum
64. Characteristics of the comprehensive equipment management phase - HCBBS Forum
65. Technical Introduction | Stick Welding - HCBBS Forum
66. How to deal with insufficient hardness during heat treatment quenching? - HCBBS Forum
67. NACT and heat treatment processes - HCBBS Forum
68. Summary of methods for detecting and improving surface defects in metal materials, as well as standard detection methods - HCBBS Forum
69. Calculation of extractable floating-head heat exchangers - HCBBS Forum
70. Safety Management System for Explosion-Proof Electrical Equipment and Instrumentation - HCBBS Forum
71. Inspection and maintenance of reaction vessels - HCBBS Forum
72. Is it a coincidence that the calculation formulas for the effective height of the opening reinforcement and the height of the straight edge section of the WN flange are similar? - HCBBS Forum
73. Maintenance and calibration of pressure vessel safety valves - HCBBS Forum
74. 【Ten Years of Rapid Development in Chemical Processing Equipment】2022–2024: The World’s First 300 tons/day Pure Oxygen Pressured Fluidized Bed Biomass Gasifier - HCBBS Forum
75. Specific procedures after pressure vessels reach their designed service life - HCBBS Forum
76. Detection of ferrite content in chromium-nickel austenitic stainless steel heads - HCBBS Forum
77. How to weld titanium? - HCBBS Forum
78. Strength calculation of horizontal jacketed vessels - HCBBS Forum
79. Simulation of maximum thermal process treatment - HCBBS Forum
80. The issue of the theoretical wave number N in the instability calculation of storage tanks according to GB50341 - HCBBS Forum
81. Analysis of the causes of gate valve leakage and treatment measures - HCBBS Forum
82. Principles for determining the minimum thickness of pressure vessels - HCBBS Forum
83. Does anyone have a software for checking the allowable stress values per GB150-2024? Please share it, thank you - HCBBS Forum
84. Pipeline static grounding devices and cathodic protection systems - HCBBS Forum
85. How to choose valves for hydrogen production systems? - HCBBS Forum
86. Does pilot testing refer to “medium-scale” tests? - HCBBS Forum
87. How to calculate the heat transfer capacity of a heat exchanger - HCBBS Forum
88. There are mainly three modes for device management - HCBBS Forum
89. The boss had a whim and insisted on designing a square tank that is 2 meters long and wide and 13 meters high; anyone, please give some advice - HCBBS Forum
90. Selection of the supply condition for forgings - HCBBS Forum
91. What details should be noted in TIG welding? - HCBBS Forum
92. Please provide ASME B31.3 and ASME B31.1; send them to wangtao20080930@126.com. Thank you - HCBBS Forum
93. What are the differences between 7075 and 6061 aluminum alloys? - HCBBS Forum
94. Helium mass spectrometer leak detector—differences between positive pressure helium testing and negative pressure helium testing - HCBBS Forum
95. What are the advantages and disadvantages of spiral plate heat exchangers? - HCBBS Forum
96. For the series of valves on the steam inlet pipe of the heat exchanger, should they be installed horizontally? Is it okay to install them vertically? - HCBBS Forum
97. Lanshi Heavy Equipment completed the manufacturing and delivery of 2 OCP (olefin cracking) reactors for the methanol-to-olefins unit in Guangxi Huayi’s integrated methanol-to-olefins and downstream processing project - HCBBS Forum
98. Which process should be carried out first for oxygen stainless steel: pickling, passivation, or degreasing? - HCBBS Forum
99. What are the common causes of an increase in the boiler’s exhaust gas temperature? - HCBBS Forum
100. Is it feasible to use lock-bottom butt welding between the large flange of the equipment and the cylinder? - HCBBS Forum