Comparison between 3D elbows and 1.5D elbows
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Please discuss: the advantages and disadvantages of 3D elbows and 1.5D elbows respectively. Is the stress on 3D elbows truly lower than that on 1.5D elbows?
1.5D is okay. The thickness of the 3D back is reduced significantly during the manufacturing process.
It’s hard to tell the difference; it’s just a matter of design, with different uses
Elbows with 3 times the diameter of D are more suitable for transporting scouring media such as slurry
The 1.5D elbow is a commonly used type of elbow; the standard ASME 16.9 can be referred to for this purpose. In China, there is also a standard called GB/T12459-2005. If we are to discuss the differences and applications between these standards, I would ask Teacher Boyi to explain – he is an expert in this field!
Teacher Boyi has posts on this forum regarding this topic; please visit: http://bbs.hcbbs.com/thread-1264537-1-1.html
The turning radius of 3D is twice that of 1.5D, so the space it occupies during installation is different. The turning radius of 3D is twice that of 1.5D; as a result, the flow pattern of the fluid inside the elbow, as well as the intensity of erosion and corrosion, also change. The turning radius of 3D is twice that of 1.5D; with the same material and manufacturing conditions, it experiences less stress.
On high-temperature pipelines, I still recommend using 3D elbows for better pipeline lifespan