Copper Tube Handbook: Table 4.1

Nominal Standard Size, inTube TypeTemperMinimum Bend, Radius*, in
14K,LAnnealed34
38K,LAnnealed112
K,L,MDrawn134
12K,LAnnealed214
K,L,MDrawn212
34K,LAnnealed3
K,LDrawn3
1K,LAnnealed4
114K,LAnnealed9