English — Forum #92 (Page 9/87)

1. Regarding whether forced acid cleaning is required for stainless steel pipe welds - HCBBS Forum
2. I would like to know why stainless steel pipes do not require socket welding - HCBBS Forum
3. Where does the theoretical flow rate calculation formula for pressure relief valves come from? - HCBBS Forum
4. What does this symbol mean? - HCBBS Forum
5. 【Ten Years of Rapid Development in Chemical Engineering Equipment】2361-2021: Chengde Steel Pipe’s Research and Development of Large-Diameter, Low-Temperature-Resistant Seamless Pipes for the China-Russia Eastern Pipeline Project - HCBBS Forum
6. What domestic material is equivalent to P420N? - HCBBS Forum
7. How to repair large-diameter stainless steel pipes to restore their circular shape - HCBBS Forum
8. Help request (issue with heat treatment state of alloy steel) - HCBBS Forum
9. Issues regarding the installation load of spring supports - HCBBS Forum
10. Which one has better liquid sealing performance, V-type ball valve or O-type ball valve? - HCBBS Forum
11. How to prevent bolts inside the mixing tank from falling off - HCBBS Forum
12. 【Translation】Factors to consider when selecting pipeline materials for long-distance natural gas pipelines, as well as technological advancements that have been achieved. - HCBBS Forum
13. Seeking information on valve API trim - HCBBS Forum
14. Titanium-nickel-zirconium fitting manufacturers - HCBBS Forum
15. American standard socket weld valves - HCBBS Forum
16. **The pipeline network has established two key laboratories in the field of pipelines - HCBBS Forum
17. Pass criteria for airtightness leakage test - HCBBS Forum
18. What does 0% in the middle of the north direction represent? - HCBBS Forum
19. Are hydrochloric acid pipes with a steel lining and PTFE considered pressure pipes? Is it necessary to inform me before installation? - HCBBS Forum
20. Working Principle and Applications of Diaphragm Valves - HCBBS Forum
21. How is the term \"toxic\" defined in the definition of pressure pipelines? ! - HCBBS Forum
22. There are problems with condensate collection - HCBBS Forum
23. How to calculate the back pressure of a safety valve on a pipeline - HCBBS Forum
24. Pressure rating of the glass level gauge at the boiler site - HCBBS Forum
25. Pressure value used for cleaning pipes by blast purging method - HCBBS Forum
26. Classification of valves and valve testing standards - HCBBS Forum
27. Maintenance Manual and Applications for Filter Valves: Key Steps to Ensure Process Purity - HCBBS Forum
28. Pipeline grade boundary - HCBBS Forum
29. Valve material issue - HCBBS Forum
30. Interpretation of expansion joint parameters - HCBBS Forum
31. [Share] Free download of the quick reference table for flange structural dimensions per HG/T20615 - HCBBS Forum
32. Wps welding procedure qualification - HCBBS Forum
33. Meaning of safety valve model numbers - HCBBS Forum
34. Installation Manual for Industrial Sealing Strips: Guidelines for Installing Special Equipment (1) - HCBBS Forum
35. Maintenance and troubleshooting of float valves - HCBBS Forum
36. What does each item in the material table represent? Please ask an expert to solve it - HCBBS Forum
37. Cold pipes require insulation pipe supports; why are ordinary pipe supports used for hot pipes? - HCBBS Forum
38. Who is responsible for the welding team that brings the tower into the site in stages? - HCBBS Forum
39. Piping purging and cleaning - HCBBS Forum
40. Can the neck thickness of butt-welded flanges with a neck of the same pressure class vary? - HCBBS Forum
41. 【Haichuan Explores the World】Do you know how to ensure roundness in hot-dipped elbows? - HCBBS Forum
42. China’s largest flexible composite pipe production line for petroleum production has been put into operation in Urumqi - HCBBS Forum
43. China’s largest single-pipeline gas transmission line, the China-Russia East Route gas pipeline, has been fully completed - HCBBS Forum
44. Free sharing – Pipe insulation thickness calculation table (maximum allowable heat loss method) - HCBBS Forum
45. Is GB9711 applicable to Q345R material? - HCBBS Forum
46. HGT 20645-2022 Specifications for Mechanical Design of Piping in Chemical Plants - HCBBS Forum
47. Valve actuation system technology: Application analysis of electric, pneumatic, and hydraulic actuation systems - HCBBS Forum
48. What measures need to be taken after the steam insulation for the materials in the storage tank is turned off? - HCBBS Forum
49. I’m looking for the book titled “Selection and Engineering Application of Pipeline Fittings” by Song Kekē. Thank you so much! - HCBBS Forum
50. Is there a significant difference between ASTM A106 and A105 materials? - HCBBS Forum
51. Interpretation of 12Cr5MoⅠ and 12C5rMoNT - HCBBS Forum
52. Regarding the interchangeability of flanges - HCBBS Forum
53. Discarded steam traps - HCBBS Forum
54. 【Ten Years of Rapid Development in Chemical Equipment】Delivery and acceptance of hydrogen-specific valves exported from 1380 to 2023 - HCBBS Forum
55. Those who know it, please let me know what types of magnets are used for the inner and outer magnetic stones in chemical magnetic pumps, as well as their properties! ! ! ? ? - HCBBS Forum
56. On the calibration of pressure gauges used for pressure testing during cross-provincial construction - HCBBS Forum
57. Why is the flange of this level gauge thin and small? - HCBBS Forum
58. Japanese-standard hydraulic flanges and fittings - HCBBS Forum
59. Is socket welding necessary to connect flanges to pipes? Or it can be butt welded on the flange? - HCBBS Forum
60. I would like to ask about the Bernoulli equation analysis regarding the increase in pressure behind the pipe of a centrifugal pump - HCBBS Forum
61. The plug cap for the hole at the top of the safety valve is missing – is that a problem? - HCBBS Forum
62. Did an expert say that quick-connect fittings should not be used for transporting flammable and explosive liquids? - HCBBS Forum
63. 【Ten Years of Rapid Development in Chemical Equipment】1951–2024: Successful development of Gemstone Steel Pipes – China’s pipes with the thickest walls for spiral conveyors - HCBBS Forum
64. Is it required to conduct a fire resistance test on gate valves? - HCBBS Forum
65. Can a self-acting pressure relief valve replace a check valve? - HCBBS Forum
66. Inspection materials for pipeline installation – the product quality certificate for the fittings lacks information regarding hardness. - HCBBS Forum
67. Pipe root welding - HCBBS Forum
68. Seeking advice on instrument brands - HCBBS Forum
69. Questions about flange metal wound gaskets - HCBBS Forum
70. Where are steel pipes with an outer diameter of 127 generally used? - HCBBS Forum
71. Storage tank emergency relief valve - HCBBS Forum
72. Design and approval personnel for pressure pipelines of categories GA, GB, and GC (including GCD) for the year 2025 - HCBBS Forum
73. Pipeline rust removal - HCBBS Forum
74. Will hydrogen pipelines catch fire? ? ? In 2023, over 2,000 km were constructed! - HCBBS Forum
75. What should be done when the distances required in Appendix F of the “Code for Design of Industrial Metal Piping” are not met? - HCBBS Forum
76. Where does the pipe bridge turn? - HCBBS Forum
77. Are the valve shaft and the valve stem the same thing? - HCBBS Forum
78. Definition of Valve Trim - HCBBS Forum
79. What are the specific requirements for rust removal, polishing, pickling, passivation, and degreasing of oxygen pipelines at 0.3 MPa? In which standards can these be found? - HCBBS Forum
80. High-quality materials – Globe Valve (Spayshack Engineering) - HCBBS Forum
81. Applications of fluorine-lined valve pipelines - HCBBS Forum
82. How should the design pressure for pipelines at atmospheric pressure be determined? - HCBBS Forum
83. Regarding the installation of sampling valves for scale-prone pipelines - HCBBS Forum
84. What is the concept of a single-face sealed manual ball valve? - HCBBS Forum
85. Issues with non-destructive testing of high-pressure steam A335P91 pipes - HCBBS Forum
86. Where can I find the classification categories for gas hazard levels IIA, IIB, and IIC? - HCBBS Forum
87. Torque or thrust of the upward-opening discharge valve - HCBBS Forum
88. 【Ten Years of Rapid Development in Chemical Equipment】2152-2025: Amazing! Testing of residual stress in the circumferential welds of large-diameter, high-strength oil and gas pipelines has been completed - HCBBS Forum
89. How to determine whether there are severe cyclic conditions in a pipeline - HCBBS Forum
90. Vortex pump piping - HCBBS Forum
91. Does the SCH wall thickness chart include a corrosion allowance? - HCBBS Forum
92. [Hokod Valve] Pneumatic quick-cut hard-sealed butterfly valve - HCBBS Forum
93. Given the volume of the double-acting cylinder of the valve, how can one estimate the volume of the air reservoir after 4 actuations in the event of an air supply failure? - HCBBS Forum
94. 2024 ASME Best Construction Equipment Innovation Award – Two-way Forced Sealing Ball Valve - HCBBS Forum
95. Weld impact test - HCBBS Forum
96. Do oil and gas recovery pipelines require flexible connections? Should it still only specify the inlet and outlet of the storage tank? - HCBBS Forum
97. About the selection of chemical pumps - HCBBS Forum
98. 【Ten Years of Rapid Development in Chemical Processing Equipment】Globe valves with a nominal diameter of approximately 2.2 meters/88 inches, from 1463 to 2022 - HCBBS Forum
99. Xinrui Mini-Class || What You Need to Know About Sealed Ceramic Flanges... - HCBBS Forum
100. What causes air leakage in the lift valve of the dust collector cylinder? - HCBBS Forum