English — Forum #276 (Page 19/145)

1. What is alignment? Overlooked small details - HCBBS Forum
2. Which stainless steels do the 400 series stainless steels refer to? - HCBBS Forum
3. Corrosion resistance of Monel alloy - HCBBS Forum
4. The impact of chloride ion concentration on equipment - HCBBS Forum
5. In-depth analysis of knowledge related to ball valves - HCBBS Forum
6. Acetic acid storage tank material - HCBBS Forum
7. Material selection for sulfuric acid storage tanks - HCBBS Forum
8. Discussion on the calculation of the thickness of pre-welded components for Type N pipe racks in the HG/T21629-2021 pipe rack standard drawings - HCBBS Forum
9. For Class D welds between nozzles with reinforcement rings and a diameter greater than 250, and the shell and head, what is the appropriate timing for non-destructive testing? - HCBBS Forum
10. What does 25/T in this picture mean? - HCBBS Forum
11. Methods for removing scale from condensers - HCBBS Forum
12. Selection of flux for submerged arc welding of Q345R and S30408 - HCBBS Forum
13. Examples of mistakes in material selection - HCBBS Forum
14. For radiographic or ultrasonic testing, whether fully or partially – what is the basis for making that decision? - HCBBS Forum
15. Reasons for damage to the safety valve diaphragm - HCBBS Forum
16. Introduction to the Construction of Pilot Plant Facilities in Chemical Industrial Parks - HCBBS Forum
17. Concentration and temperature limits for the use of non-metallic materials in hydrofluoric acid - HCBBS Forum
18. What is the name of the ring at the outer end of the split-case of a threaded lockring heat exchanger, and what is its function? - HCBBS Forum
19. Conversion between PN nominal pressure and Class in pounds (Lb) - HCBBS Forum
20. How are gaskets marked in JIS B2404? - HCBBS Forum
21. Do atmospheric pressure storage tanks require regular inspection? What are the requirements for inspection qualifications? - HCBBS Forum
22. A full-process solution to the leakage problem of heat exchange tubes in pressure vessels - HCBBS Forum
23. Valve body material - HCBBS Forum
24. 【Haichuan Equipment Guessing Game】Have you still remembered it after fulfilling its historical mission? ? ? - HCBBS Forum
25. Basic knowledge of bolts - HCBBS Forum
26. I would like to ask about the penetration of chloride ions into tetrafluoride - HCBBS Forum
27. Why is △T not subtracted in the verification for low-temperature brittle fracture per Appendix F of GB/T150.3? - HCBBS Forum
28. Differences between NPT, PT, G, ZG, RC, and M threads - HCBBS Forum
29. Why is the size of the pump suction pipe usually one size larger than that of the pump connection? - HCBBS Forum
30. On-site maintenance and repair of electro-bag composite dust collectors - HCBBS Forum
31. 4,000-ton tower equipment for South Korea’s largest petrochemical project manufactured and shipped in Zhangjiagang - HCBBS Forum
32. What does welding quality control rely on? - HCBBS Forum
33. Four key points to keep in mind for effective equipment management - HCBBS Forum
34. Several principles for selecting gaskets for pressure vessels - HCBBS Forum
35. Causes of flange leakage and treatment methods - HCBBS Forum
36. Basic requirements for welded joints of pressure vessels and non-destructive testing - HCBBS Forum
37. The jacketed vessel has pipe openings running through the jacket and the inner cylinder - HCBBS Forum
38. Analysis of cracks in low-temperature superheater tubes - HCBBS Forum
39. Regarding distillation operations - HCBBS Forum
40. 【Ten Years of Great Development in Chemical Equipment】From 1985 to 2024, Hangyang developed its own 100m3 horizontal liquid hydrogen high-vacuum insulated storage tank - HCBBS Forum
41. Applications of butterfly valves and gate valves under different operating conditions - HCBBS Forum
42. Why is it necessary to drain water from steam systems? - HCBBS Forum
43. Seeking the new version of EN14620 standard for 2024 - HCBBS Forum
44. Questions regarding the welding heat input specified in NB/T 47014 - HCBBS Forum
45. Relationship between the thickness of the tube sheet and the flange thickness in fixed-tube-sheet heat exchangers - HCBBS Forum
46. Key Points Analysis and Overview of the Design, Forming, and Welding of Shell Plates for Large Spherical Vessels - HCBBS Forum
47. Seek advice on material selection for a medium with pH 4.5, 3% CI ion content, and a temperature of 90°C - HCBBS Forum
48. Questions about metal materials - HCBBS Forum
49. Classification of petrochemical static equipment - HCBBS Forum
50. SW6 local stress calculation - HCBBS Forum
51. What are ppm, ppb, and ppt? - HCBBS Forum
52. Advanced heat treatment technology - HCBBS Forum
53. 【Ten Years of Rapid Development in Chemical Processing Equipment】From 1257 to 2023: Tangsteel’s first batch of ultra-wide-section hydrogen pipeline steels was successfully produced - HCBBS Forum
54. The software gives this error when calculating the tube sheet in SW6; reinstalling it doesn’t help either - HCBBS Forum
55. Static electricity hazards and prevention in chemical enterprises - HCBBS Forum
56. Differences and relationships between gauge pressure, negative pressure, absolute pressure, and static pressure - HCBBS Forum
57. 【Ten Years of Great Development in Chemical Equipment】Like it from 2012 to 2023! First-generation reconstructed super slurry bed forge-welded hydrogenation reactor - HCBBS Forum
58. Fundamental research on mechanical seals - HCBBS Forum
59. Purpose and principles of metal hose installation - HCBBS Forum
60. Tianhua Institute reaches a framework agreement on technical cooperation for polypropylene reactors with German EKATO - HCBBS Forum
61. How to choose an industrial endoscope? - HCBBS Forum
62. Pressure vessel pressure test and leak test - HCBBS Forum
63. Key points for flux-cored wire welding operations and post-weld inspection - HCBBS Forum
64. Help: Are there any manufacturers in China that can roll steel plates with small diameters? Any knowledgeable friends, please help me out. - HCBBS Forum
65. Q&A on Tubular Heating Furnace Technology [22] - HCBBS Forum
66. Instrument steam tracing tube - HCBBS Forum
67. Properties of 904L material - HCBBS Forum
68. Hot technologies related to heat treatment techniques - HCBBS Forum
69. Why is it necessary to test the oxygen, nitrogen, and hydrogen content in steel during the steelmaking process? - HCBBS Forum
70. Pressure adjustment and operating procedures for safety valves - HCBBS Forum
71. 【Haichuan Equipment Guessing Game】Can these numerous support blocks be optimized? - HCBBS Forum
72. Specifications for the inspection and management of equipment and tooling - HCBBS Forum
73. What is the principle behind σ0=2[σ]t in clause 4.3.3.3 of GB/T150.3? - HCBBS Forum
74. Q&A on Tubular Heating Furnace Technology [18] - HCBBS Forum
75. Gauge bend - HCBBS Forum
76. Corrosion of nickel alloys in a hydrogen environment - HCBBS Forum
77. Pipe filter - HCBBS Forum
78. Common misconceptions in equipment management - HCBBS Forum
79. Unit of leakage rate - HCBBS Forum
80. Measures to improve the fatigue strength of welded structures - HCBBS Forum
81. Is it necessary to conduct a new weld assessment when changing the weld pattern in heat exchanger tube sheet welding? - HCBBS Forum
82. 【Ask for advice】Structure design of quick opening door - HCBBS Forum
83. Is a supervision certificate required to purchase manholes on pressure vessels? - HCBBS Forum
84. What is that thing called a reinforcement ring for coiled tubes, a plate? - HCBBS Forum
85. 【Haichuan Equipment Guessing Game】Why is there an octopus under this reactor? - HCBBS Forum
86. Standards for the good condition of instrumentation equipment - HCBBS Forum
87. Differences between carbon steel and stainless steel - HCBBS Forum
88. Maximum height of the floating roof in the methanol storage tank - HCBBS Forum
89. Oxidation, hydrogenation, fluorination – hazardous processes requiring focused safety inspections - HCBBS Forum
90. Purpose and principles of metal hose installation - HCBBS Forum
91. Please provide a software for classifying pressure pipelines in accordance with Document No. 41 (2021). Thank you. - HCBBS Forum
92. What is the function of a double-headed bolt? Why choose a double-headed bolt? - HCBBS Forum
93. Q&A on Tubular Heating Furnace Technology [14] - HCBBS Forum
94. Harmful factors of welding materials – what should be considered when using them? - HCBBS Forum
95. Equipment inspection - HCBBS Forum
96. Two exam questions on tube sheets - HCBBS Forum
97. 24 common metal materials and their properties - HCBBS Forum
98. Application scenarios for sealing points to address the safety risk of valve and flange leaks in chemical, petrochemical, and refining plants——Detect leaks early to prevent problems before they occur - HCBBS Forum
99. Is it true that the higher the ground contact height, the better? - HCBBS Forum
100. Backside protection methods for stainless steel welding - HCBBS Forum