Dear All ,

I have a question about pipe Cold bend . In Table 841.2.3-1 show Minimum Radius of Bend in Pipe Diameters

i supposed Pipe   ⌀ 12 " have to Minimum Radius of Bend in Pipe Diameters is 18D

how i calculate and measurement at field , i compared formula in pipeline handbook but i don't know which one is true

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