On-site tube replacement in shell-and-tube heat exchangers
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It’s not a specialized manufacturing plant; it is planned to replace approximately 10% of the heat exchange tubes (with a length of 3 meters) in the tubular heat exchangers on-site. Are there any things to keep in mind? Also, when purchasing heat exchange tubes, is it better to choose a length of 3 meters or 6 meters? Is it necessary to include a length allowance? How much margin should be added?
Just two simple lines of text, and the following questions can be answered: 1. Without the necessary manufacturing qualifications or those for installation and modification, yet still daring to deal with special equipment – really, there are people who aren’t afraid of ending up in prison. 2. No communication was held with the design unit, and there is no revised construction plan – quite bold of them. 3. Good luck!
What boldness! Do you even know how the tubes in a shell and tube heat exchanger are connected to the tube sheet? Is it expansion bonding, welding, or a combination of both? What about the spacers in between? How do 3M tubes pass through the holes in those spacers? You don’t know anything about this, and yet you still dare to replace the tubes – amazing
There are blueprints; for expansion welding, it’s possible to hire professional firms to carry out the work on site: lol
Now I need to prepare to purchase heat exchange tubes. How should I determine the desired length? What amount of length allowance should be added? Experts, please advise
The simplest way is to hire a professional firm to develop a plan. With a plan, you know exactly how much margin you need. If you’re too lazy to bother, have a professional agency provide the materials.
It’s best to take actual measurements, as there’s a risk that the pipes might deform or lengthen over time. If the dimensions are just right, then adding 3-5 units to one side should suffice
This post was last edited by wanlirn on 2022-5-23 at 12:33. Our company has stipulated that orders involving the replacement of some heat exchange tubes shall be rejected regardless of which salesperson brought them in； Won’t do it no matter how much money is offered ； It’s easy to fall into a pit ； Switch to another batch; there are still leaks whenever the old pipe is under pressure ； The more it’s replaced, the more it leaks’ ； Be prepared for a complete replacement ； Communicate well with Party A
Look how many people are advising you not to do this Leave professional tasks to professionals. Don’t be foolish and think this will save money. Can you be sure that the heat exchange tubes you purchased meet the design requirements? Are you sure physical and chemical experiments will suffice? Are you sure you’re buying standard tubes that meet the design requirements? Just from you saying “flash welding,” it’s clear you’re an amateur who knows nothing. I can’t tell the difference between rising and swelling. I still suggest that you don’t carry out such operations on your own. If an explosion occurs, the person who purchased it is responsible for it – that’s who has to deal with it! Are you willing to take on this responsibility? Do you think you can get away?