Regarding the formula for calculating the wall thickness of elbows
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I have a question regarding pressure pipelines for fellow members: according to the regulations for pressure pipelines, the calculated wall thickness on the outside of an elbow is less than that of a straight pipe with the same pressure-bearing capacity, which in turn is less than the calculated wall thickness on the inside of the elbow. Could this result in the bending capacity being lower than that of the pipeline?
In accordance with the regulations for pressure pipelines, the calculation of elbows does take into account the difference in wall thicknesses on the inner and outer sides. This is mainly because the stress conditions experienced by elbows are complex, resulting in greater stress concentration compared to straight pipes. Typically, the inner wall thickness of an elbow is designed to be thicker to withstand greater stresses, while the outer wall is thinner. However, this design does not mean that the pressure-bearing capacity of the elbow will be lower than that of a straight pipe. Appropriate measures were taken during the design and manufacturing processes, such as improving the quality of materials and strengthening inspections in the elbow areas, to ensure that the pressure-bearing capacity of the elbows meets the requirements of the entire piping system. Overall, as long as it is designed and used in accordance with the regulations, the safety of elbows is guaranteed. .