Issues with installing and removing bolts

The main thing is to make sure not to aim directly at oneself, in order to avoid being harmed by splashes; also, be careful not to move too quickly – first loosen the area to allow any accumulated fluid to drain out

The opinions on the 2nd floor are good. First and foremost, one must pay attention to their own safety; this is of utmost importance. To ensure safety, additional notes for the second floor: (1) Remove the bolts in intervals, then loosen them to relieve pressure, and finally remove them. (2) Wear proper protective equipment.

There are certain technical techniques involved in tightening and loosening bolts, especially when dealing with those that have gaskets, such as when installing valves or manholes. This is particularly true for the flanges of equipment under pressure; when tightening the bolts, it is necessary to follow the principle of cross symmetry, meaning that force should be applied simultaneously at symmetric positions. This prevents the bolts from exerting uneven pressure on the gaskets, which could lead to the gaskets being displaced under pressure and causing injury. When installing large flange covers, after they are fixed symmetrically, each bolt should be turned by an equal angle each time; it is not necessary to turn it all the way in one go – multiple turns are required before it reaches the final position. Whether it’s clockwise or counterclockwise depends on your* preference; there’s no need to force anything. When removing the bolts, it is also advisable to follow the rules mentioned above, so as to avoid the situation where one bolt is loose while another is tight, which can cause the bolts on either side to get stuck and make removal difficult. For rusty bolts, do not try to remove them by force; you can spray some liquid wrench on them, wait for five to ten minutes, and then attempt to remove them. This will make the process easier and prevent the bolt from breaking.

Not all of them. Some bolts have reverse threads. It’s relatively simple to disassemble; the main thing to pay attention to is the safety of pressure vessels or pipes. It’s easy to learn this by asking experienced workers. It’s about trying to keep the part that’s farther away from oneself as relaxed as possible, so that splashes and similar things won’t hurt one’s own self. Installation is rather complicated, especially with large-sized multi-bolt assemblies; it’s essential to tighten them symmetrically, in a “cross” pattern, and then tighten them all again. Learn from the experienced craftsmen more; it’s very easy. :)

Be careful to protect yourself while disassembling it, so as not to get burned by the splashing material. Installation is a technical task; it is important to ensure even tightening, applying force gradually to prevent leaks caused by uneven tightening.

In fact, both disassembly and assembly share one common goal: preventing leaks. When disassembling, to avoid the spilled liquid from getting on oneself or fellow workers, it is important to pay attention to the location of the first bolt that needs to be loosened; it’s best to choose a position far away from people. Also, make sure to loosen the bolts in an orderly manner. When assembling, it is necessary to tighten the bolts symmetrically, so that the gaskets are compressed and deformed evenly, thereby ensuring a successful installation.

Apply butter before tightening the bolts – it’s beneficial for both you and the equipment.

That’s right; when I was working in the lab, the first thing they taught me was how to tighten screws symmetrically – it’s all about experience

Go to the production site to take a look, learn from it, and ask questions – then you’ll understand

Be careful to ensure the safety of pressure vessels or pipelines when disassembling them; in case of splashing or similar, avoid harming yourself and others

1. First of all, pay attention to personal safety. 2. When disassembling, make sure that the pressure inside the tower, container, pipes, etc. has been completely released and drained. 3. When removing bolts, do so one by one; when reinstalling them, tighten them in a cross pattern. Even if the pressure gauge indicates zero, the bolts should not be removed entirely. When exposed to toxic or harmful substances, be sure to replace the pressure gauge. Loosen and remove it gradually and slowly only when the gauge indicating the minimum pressure shows zero. 4. When reinstalling, apply oil to the threads selectively based on the actual conditions on site. To facilitate disassembly next time.