To the designers: Please stop teasing us workers like this (3)
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This post was last edited by Huangyan Buluo on 2016-7-29 at 14:42. It was also last edited by 3030 on 2016-6-19 at 09:23. http://bbs.hg707.com/data/attachment/forum/201606/19/092224zierhnf1wqwiz16n.png More updates on these irresponsible and frustrating design choices will be provided going forward. If you’re interested in this content, please follow us or share this post as indicated in the image above! http://bbs.hg707.com/data/attachment/forum/201606/19/092228gwpew5we93236x44.png Please take a look at this first to see whether the design is good or not The device’s outlet pipe is too large, while the material pipe is small; if reducers are used, three of them would be required. Moreover, the inlet shut-off valve should be as close to the device as possible to prevent accumulation of material. If reducers are used, the height will increase, and the valve will have to be placed at a greater distance, making operation inconvenient. The design involves using a pipe with a larger diameter to raise the inlet pipe, with a blind flange at the end, and the material pipe being welded directly from the side. http://bbs.hg707.com/data/attachment/forum/201606/19/092232ai0b40hdhg8hgern.png Are they the inlets and outlets of the storage tanks in the tank area? 1. It seems there should still be enough space at the site to install a regular elbow; I’m not sure how the site ended up in this state. 2. It seems that there’s no need to add that short pipe after it’s installed; it’s a waste of two flanges. http://bbs.hg707.com/data/attachment/forum/201606/19/092236fv0vh8hoh8mhz8hu.png http://image91.360doc.com/DownloadImg/2015/11/2522/62056837_6 This was also caused by the owner lowering the equipment without permission. How is such a small bend possible, when pipes have already been installed there? http://bbs.hg707.com/data/attachment/forum/201606/19/092240cbas27lnl3l1o2iz.png During on-site installation, the device was lowered, which is why it’s in this terrible condition now! Conclusion for today: Know yourself and your enemy, and you will never be defeated in battle; learning more* helps to minimize mistakes.
Thank you, LZ, for sharing these pictures. 1. This designer is probably just out of school; there’s no need to add a short section. It would be sufficient to simply drill holes in the flange blind plate, weld a short section there, and then add an elbow – it’s a waste of a lot of money! Of course, if it is a pressure pipeline, it is also necessary to check whether the thickness of the blind plate is sufficient. 2. One elbow is missing; that’s why it ends up looking like this. If there were elbows present, the workers on site wouldn’t go to the trouble of welding the edges to make it look that way. :Lol, that short section would be suitable if it’s installed between two valves; if necessary, a drain valve can also be installed on this short section. 3. Elbows cannot be directly welded to flanges; a short section must be added, as this results from non-compliant construction practices. 4. There are many issues with this photo: First, the device (which appears to be a heat exchanger) is installed directly on the floor slab, without any supports or bolts for fixing it. If there is no beam beneath the patterned plate, the increased weight of the material once it is placed there could cause problems ； Secondly, during piping, weld the elbow directly to the flange again ； Some pipelines also use galvanized pipes; generally, these galvanized pipes are connected using screws, rather than being welded directly to carbon steel elbows ； In the end, the pipeline was not laid in a straight and level manner.
There are issues with the design as well as with installation.....