Table 14.8. Radii of Coiled Expansion Loops and Developed Lengths of Expansion Offsets

See Figure 14.3

Expected expansion, inchesRadius R, inches, for nominal or standard tube sizes shown
Radius L, inches, for nominal or standard tube sizes shown
1438123411141122212331245
12R 6 7 8 9 11 12 13 15 16 18 19 20 23
L 38 44 50 59 67 74 80 91 102 111 120 128 142
1R 9 10 11 13 15 17 18 21 23 25 27 29 32
L 54 63 70 83 94 104 113 129 144 157 169 180 201
112R 11 12 14 16 18 20 22 25 28 30 33 35 39
L 66 77 86 101 115 127 138 158 176 191 206 220 245
2R 12 14 16 19 21 23 25 29 32 35 38 41 45
L 77 89 99 117 133 147 160 183 203 222 239 255 284
212R 14 16 18 21 24 26 29 33 36 40 43 45 51
L 86 99 111 131 149 165 179 205 227 248 267 285 318
3R 15 17 19 23 26 29 31 36 40 43 47 50 55
L 94 109 122 143 163 180 196 224 249 272 293 312 348
312R 16 19 21 25 28 31 34 39 43 47 50 54 60
L 102 117 131 155 176 195 212 242 269 293 316 337 376
4R 17 20 22 26 30 33 36 41 46 50 54 57 64
L 109 126 140 166 188 208 226 259 288 314 338 361 402