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Rolled Groove
One or more grooves may be employed to increase turbulence of a fluid passing through the tube, thereby improving thermal transfer. The groove may also be used to locate other components inside the tube or provide a means for retention of subsequent assemblies. Due to work hardening in the groove area, ductile materials and tempers should be specified.
| FEATURE | LIMITS | TOL. (IN.) |
| O.D. | 187" max | std. |
| Wal | 5% to 15% of O.D. | std. |
| Groove width | None | --- |
| Groove depth | .15 x O.D. (max.) | --- |
| Groove location | 7 x O.D. (min.) | --- |
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