The economizer is leaking

Just weld it on again, haha; I don’t know how to weld

That might be due to too much stress! It needs to be able to expand and contract freely! ! !

Stop and carry out maintenance to check if it’s due to excessive vibration.

Could it be caused by poor water quality?

Was it because the welds at that time did not meet the standards, resulting in a sudden change in stress? Or was it because the liquid inside the pipeline was corrosive?

Pay attention to selecting the welding rod, and the welds must be inspected.

Reweld it; it’s probably a welding quality issue

First, analyze the causes of cracking and eliminate the factors that lead to it; then, develop an appropriate welding process for carrying out the welding, and finally conduct necessary magnetic particle or penetrant testing to ensure the quality of the weld.

:o Our joint box suspension pipes also keep breaking, on both sides

There is no doubt that it is due to excessive stress; there are two solutions: 1. Modify the connection method between the economizer and the header to increase the expansion compensation. 2. Is the joint box pipe seat of the plug-in type? If so, replace it with a reinforced pipe seat; TIG welding must be used as the base welding method.

Expansion is hindered, or there is frequent vibration

If there’s a weld failure, you can just weld it back together – of course, following the welding specifications. We’ve never encountered this problem before; it’s likely a defect left over from the construction process.

My economizer is also leaking; it’s not working anymore as the water is going around it via a bypass

I think we should analyze the reasons: there was welding failure at the junction and the header; since it has been in use for several years, stress is probably not the cause. Or high stress is not the main reason either. 1. Whether the welding material chosen is suitable for the requirements of the material – an inappropriate welding material will certainly significantly reduce its service life. 2. Reasons for wear. Fly ash in flue gas is a significant factor contributing to wear; welding protective templates at the tube bundles and headers is also a good approach. 3. Vibration may also be a very important aspect. If that’s the case, it’s necessary to address the root cause and find out what is causing the vibration. 4. Increase the expansion amount to prevent obstruction of expansion. Just my humble opinion; please feel free to give your feedback

This post was last edited by Standing in the East on 2009-8-12 at 18:12, version 1. Excessive stress and installation issues lead to thermal expansion problems. 2. Prolonged exposure to water, vibration, and impact. 3. Frequent start-up and shutdown of the furnace. As a supplementary point, it’s possible that the internal components of the water supply mixing header are damaged