Why do the connection pipes between the slurry steam generator and the steam drum often crack?
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Why do the connection pipes between the slurry steam generator and the steam drum often crack?
1. Is it due to excessive steam fluctuations? 2. If so, could it be problems with the wall pipelines of the steam generator or with the overall heat treatment of the generator? 3. The material: the pipelines are generally made of 20G
Obviously, the temperature of the slurry is too high, resulting in excessive stress at the welded parts of the equipment. It’s necessary to conduct a calculation and add reinforcements.
You can ask a technician to simulate it in order to find the appropriate conditions
1. Is it due to excessive fluctuations in steam/oil slurry? 2. If it’s related to the pipelines on the walls of the steam generator, it could be an issue with the overall heat treatment of the generator. 3. The material used for these pipelines is usually 20G. 4. Pipelines that are just put into use generally need to undergo heat-tightening treatment.
I believe it is the large difference in the thermal expansion coefficients of the two materials that leads to thermal stress; it is recommended to choose materials with smaller differences in thermal expansion coefficients or those with identical coefficients. Additionally, attention should be paid to the type of welding rod used during welding, as both of these factors can contribute to the aforementioned issue
Reply to 1# Sanlian and Workshop: It is likely a pipeline stress issue, which can be resolved by adding reinforcements or performing post-weld heat treatment； Another thing to note is whether the system has been exposed to alkalis; if so, it may suffer from alkali-induced cracking