Why is there such a large bend in the pipeline attached to the tower at the top?
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【Haixin Chemical Cup ☆ Haichuan Chemical: Spring Has Arrived】Refineries under the Blue Sky 128 http://bbs.hcbbs.com/thread-1768817-1-1.html (Source: Haichuan Network) I saw this in a post – why does the pipeline attached to that tall tower need to make such a large bend? Can’t just use two elbows instead? 【Haixin Chemical Cup ★ Haichuan Chemical: Spring Has Arrived】Summary Post of the 2017 Scenery Sharing Event: http://bbs.hcbbs.com/thread-1766484-1-1.html (Source: Haichuan Network) Guidelines for the 【Haixin Chemical Cup ★ Haichuan Chemical: Spring Has Arrived】 event: (1) Event duration: Participation is allowed from March 10 to May 20, 2017, with the evaluation period running from May 21 to May 31. (2) Posting location: The tourism section of the forum. (3) Requirements: Share pictures of landscapes, flowers and plants from various places, as well as thoughts on spring and the joy that comes with its arrival. At least four pictures should be posted; it’s preferable to have one post per thread along with accompanying descriptions, and series of posts are encouraged. Don’t send all the pictures at once for one floor; it’s not convenient for sharing. In the “Leisure Area – Self-driving Tourism” section, posts related to the “Tourism” theme can be created in the form of pictures of people, scenery, food, etc.; sticky notes are not valid. Posting format: 【Haixin Chemical Cup ★ Spring Has Arrived with Haichuan Chemical】 + number + your own title. (4) Prizes for participants: Those who take part in the activity will receive 1 Haichuan coin (subject to meeting the activity requirements), as well as flowers. For the best posts selected by the event organizers this year, the post authors will also receive an additional reward of “flowers + Haichuan coins”. In total, 5 first prizes, 20 second prizes, and several excellence awards will be given; the winners of the first and second prizes will receive physical prizes! For more information on the prizes for the 【Haixin Chemical Cup ★ Haichuan Chemical: Spring Has Arrived】 event, please visit the leisure section of the “Haichuan Chemical Forum”. *The [Haichuan Chemical Forum] holds the final right of interpretation for this event. In spring, you share happiness; in autumn, you will reap a myriad of joys. Everyone is welcome to participate and share their happiness. Happy HaiChuan is waiting for you! [Haixin Chemical Cup ★ Spring Has Arrived at HaiChuan Chemical] Summary post of the 2017 Scenic Beauty Sharing Event: http://bbs.hcbbs.com/thread-1766484-1-1.html (Source: HaiChuan Network)
It is a snub bend pipe specifically added to prevent pipeline vibration caused by vapor-liquid two-phase flow.
I’m happy to help others. Thank you; it’s the first time I’ve heard this technical term, so I’m not quite clear about how it works. ==== Feel free to participate in the travel-related sharing activities when you have time
Xiangbi Bend is not a professional term; it’s just a casual name used by the guys from the large design institutes. The device with an elephant-trunk-shaped curve shown in the image is likely the vapor line pipe of the atmospheric pressure tower. This pipe often suffers damage due to thermal expansion; the main reasons for this are insufficient transition time from a cold state to a hot state during startup, as well as the fact that the pipe’s natural expansion is restricted by the supports, preventing it from expanding freely. . . . Just take a look at the two pictures below – it’s not necessary to have an elephant-trunk bend; it depends on the preferences of the pipeline engineers in the design team. .
Thank you, swordsman! The trunk bend seems to be more flexible. Brother Dao, do you have time to participate in the travel-related activities?
A structure similar to an expansion joint or expansion elbow, installed to ensure normal operation when the temperature of the distillate medium inside the tower is significantly higher or lower than the ambient temperature (as determined through thermal calculations and data on material expansion).
According to the information on the swordsman on the second floor, this tension bend is not set arbitrarily; an incorrect pivot point can instead lead to pipeline problems
Why can the vibration of two-phase flow in a diagram be analyzed using an elephant trunk bend?
No PI bends have actually been used in the pipelines at the top of the tower; it is sufficient to position the support frame as high as approximately 150 units below the tangent line of the head to address the compensation issue. At the horizontal pipe outlet, there are indeed some issues related to two-phase flow, which require the use of such a structure