English — Forum #276 (Page 40/145)

1. Why can’t impurities be completely removed in chemistry? - HCBBS Forum
2. Material standards - HCBBS Forum
3. Welding processes for austenitic stainless steel - HCBBS Forum
4. What issues need to be considered during the on-site installation of reciprocating compressors - HCBBS Forum
5. I have a gentle question: do thermocouples have a range? Thank you - HCBBS Forum
6. Introduction to the surface treatment of rolled stainless steel pipes and the role of various elements in stainless steel - HCBBS Forum
7. Questions regarding the scope of qualifications for boiler repair licensing - HCBBS Forum
8. Gentlemen, SW6 is unable to calculate conical heads with a half-apex angle greater than 30 degrees; then how should conical heads with a half-apex angle of 45 degrees be checked? - HCBBS Forum
9. If the concrete foundation of an atmospheric pressure storage tank is cracked - HCBBS Forum
10. Welded structure - HCBBS Forum
11. Plate heat exchanger - HCBBS Forum
12. If the manufacturer and the installer of the pressure vessel are the same entity, is it still necessary to inform the special inspection agency about the installation? - HCBBS Forum
13. Boiler, turbine, and condensate water system - HCBBS Forum
14. How can two storage tanks connected vertically and horizontally obtain inspection certificates? - HCBBS Forum
15. SHT 3406-2022, SHT 3408-2022 - HCBBS Forum
16. Reasons for deformation in steel part heat treatment - HCBBS Forum
17. Common standards for valves - HCBBS Forum
18. Factory data for pressure relief manholes used in non-high-class pressure vessels? - HCBBS Forum
19. Questions regarding welding issues after internal inspection of the boiler - HCBBS Forum
20. How is the observation direction of the stage partition determined in the staged arrangement configuration of heat exchangers? - HCBBS Forum
21. The influence of metal elements in welding wire on welding quality - HCBBS Forum
22. Equipment calculation sheet - HCBBS Forum
23. **Latest Regulations on the Production and Use of Special Equipment - HCBBS Forum
24. Notice on Holding the First Training Course in 2023 to Improve the Professional Competencies of Pressure Vessel Designers - HCBBS Forum
25. Introduction to Common Materials for High-Temperature Equipment - HCBBS Forum
26. Who is right and who is wrong about the “hydrostatic test pressure” - HCBBS Forum
27. Design calculation of condenser - HCBBS Forum
28. Strengthening for SW6 openings: What to do if there is no data available for Q345D pipes larger than 10 mm? - HCBBS Forum
29. Use of quick-opening manholes - HCBBS Forum
30. Catalog of PED Equipment Design Standards - HCBBS Forum
31. Things related to control valves - HCBBS Forum
32. CGA S1.3-2020 electronic version standard - HCBBS Forum
33. CF8, CF8M, CF3, CF3M stainless steels - HCBBS Forum
34. Calculation of the pressure on the head when calculating film stress - HCBBS Forum
35. Selection of thermal expansion type for saddle supports - HCBBS Forum
36. Is pickling and passivation still necessary when painting the surface of 304 stainless steel containers? - HCBBS Forum
37. Why is gas-phase oxygen content monitored in oxidation reactions? - HCBBS Forum
38. Installation of oil level measurement ports in petrochemical storage tanks - HCBBS Forum
39. When the equipment flange is welded to the cylinder, are two weld assessments required? - HCBBS Forum
40. Main causes of damage to the static sealing surface of valves - HCBBS Forum
41. Do heat transfer oil pipelines belong to pressure pipelines? - HCBBS Forum
42. Learn to weld heat-resistant steel in one step - HCBBS Forum
43. Mechanic’s Shop Equipment Maintenance Manual - HCBBS Forum
44. Differences between seamless steel pipes and welded steel pipes - HCBBS Forum
45. Why does the boiler standard allow a thickness exemption for heat treatment in 15CrMo, while pressure vessels do not permit such an exemption? - HCBBS Forum
46. SW6-2011 on the selection of the maximum value of the horizontal seismic influence coefficient - HCBBS Forum
47. Since the tube sheet and baffle are not manufactured in the same factory, how can the concentricity of the heat exchange tube holes be ensured? - HCBBS Forum
48. Why is it necessary to perform dynamic balancing on the rotor, and how is dynamic balancing carried out? - HCBBS Forum
49. Several issues in equipment management that urgently need improvement - HCBBS Forum
50. Problems with ultrasonic testing of steel plates - HCBBS Forum
51. Is the DN250 handhole flange cover the main pressure-bearing element? - HCBBS Forum
52. Who has the structural diagrams and PID diagrams of flue gas desulfurization towers? - HCBBS Forum
53. 9 key considerations for welding Hastelloy C-276 - HCBBS Forum
54. How to reduce welding residual stress? - HCBBS Forum
55. Questions regarding whether tank equipment operating at micro-high pressure is considered a pressure vessel and whether it is equipped with safety valves - HCBBS Forum
56. Who in China has experience in using 100mm-thick austenitic stainless steel for pressure vessel materials and in manufacturing vessel heads? - HCBBS Forum
57. Stability of vertical storage tanks - HCBBS Forum
58. DN356 head - HCBBS Forum
59. Welding procedure qualification for plasma arc welding - HCBBS Forum
60. Regarding whether the water tank is a atmospheric pressure storage tank - HCBBS Forum
61. What causes leakage in the seal of an MVR Roots steam compressor? - HCBBS Forum
62. Regarding the selection between low-level and high-level flash coolers - HCBBS Forum
63. Question: What standards apply to the weld heights of pressure pipeline welds, as well as those of the inner and outer wall welds? - HCBBS Forum
64. Can the tube sections with welding be purchased externally? - HCBBS Forum
65. Is it possible to create a small stripping experiment setup? - HCBBS Forum
66. 32108 Submerged arc welding intermediate mark - HCBBS Forum
67. Filter recommendations - HCBBS Forum
68. Notice from the Special Equipment Bureau of the State Administration for Market Regulation on issuing the “Key Points for Special Equipment Safety Supervision Work in 2023” - HCBBS Forum
69. If the inspection is carried out by the boiler inspection authority for floating-head heat exchangers, is it necessary to conduct the three pressure tests on-site? - HCBBS Forum
70. Unit issue in the calculation formula for the number of liquid loading/unloading arms HGT21608 - HCBBS Forum
71. Maintenance and repair of insulation for chemical processing equipment and pipelines - HCBBS Forum
72. A brief discussion on leakage in centrifugal pump seals and its prevention - HCBBS Forum
73. Issue of the total cross-sectional area of the heat exchanger tie rods - HCBBS Forum
74. Why is the pipe below the pressure gauge for the withstand voltage test bent? - HCBBS Forum
75. Calculation of horizontal tank saddles - HCBBS Forum
76. Regarding the use of blast discs - HCBBS Forum
77. Do all measuring instruments now, including pressure gauges, thermometers, electronic scales, etc., require online submission for regular inspections? - HCBBS Forum
78. Principles for setting the set pressure of a safety valve - HCBBS Forum
79. How long can a mechanical seal be used? - HCBBS Forum
80. Class D welds cannot pass ultrasonic testing. How should we weld in this case? - HCBBS Forum
81. Understanding toxic agents - HCBBS Forum
82. Hot gas circulation test of zirconium-titanium steel composite plate - HCBBS Forum
83. Are the holes in the supporting bearings distributed circumferentially or aligned separately? - HCBBS Forum
84. Analysis of the causes of internal leakage in control valves and solutions - HCBBS Forum
85. Positive pressure start-up air heater - HCBBS Forum
86. I would like to ask: when installing static equipment, metal shims are usually placed at the bottom. Are there any specifications regarding these shims? - HCBBS Forum
87. Problems in calculating supported bearings using SW6 - HCBBS Forum
88. Do vertical pressure vessels have requirements for foundations? - HCBBS Forum
89. The axial compressive stress check of the bottom section of the cylinder section failed. Can a section be inserted to strengthen the cylinder? - HCBBS Forum
90. Is ethylene glycol a strong osmotic agent? - HCBBS Forum
91. 9 common faults of electric motors and their troubleshooting methods - HCBBS Forum
92. Detail0910: Software for calculating stress on profiles, steel structures, beam cross-sections, and deflections - HCBBS Forum
93. Issues with pressure drop in air compressor systems: Proper configuration of air compressors helps to control pressure drops and reduce waste - HCBBS Forum
94. What are the requirements for the design of the outlet pipeline of a steam jet pump? - HCBBS Forum
95. Rockwell hardness test for welded joints - HCBBS Forum
96. Why is SA789 used for the tubes in methanol reactors? - HCBBS Forum
97. S22053 welding - HCBBS Forum
98. Does the design institute need to issue welding process requirements? - HCBBS Forum
99. I need a pH meter with a longer probe - HCBBS Forum
100. Chemical Equipment Design Assistant V1.7 (Green and Free) - HCBBS Forum