How to eliminate thermal stress in pipelines
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Pipelines are prone to expansion and deformation at high temperatures (400°C), and can break at the welds. Our company now wants to use short metal hoses to eliminate thermal stresses in all directions, but I am considering using \"J\"-shaped elbows to do the same. I wonder if this will work
The hot nitrogen gas in our factory is arranged in the manner you mentioned. Since the flanges connected at high temperatures are prone to shifting and deforming, using more elbows helps to improve the situation!
Yes, the length of the elbow should be greater than the minimum length required for the elbow as calculated based on the amount of expansion. A fixed support should be installed between the two expansion joints, while the other supports should be movable； The distance between two expansion joints should not be too large; it is generally 10–30 meters. This type of expansion joint requires a sufficiently large space; it can be installed horizontally or vertically. Metal wave expansion joints can also be used; note that these are not metal hoses. The metal wave-shaped expansion joint has a compact structure; during installation, it can be placed in a slightly stretched state, thereby enhancing its capacity for deformation compensation. A fixed support is installed between the two expansion joints, while the ends of the expansion joints must be equipped with movable supports that allow only axial displacement.