The present invention relates to a tubular support coil (1) for radial support of resiliently expanded tubing material (8), made from at least one extruded profile body (2) wound into a plurality of turns (33), the end faces (3, 4) of the extruded profile body being connected to each other at least in portions in the longitudinal direction (L) of the support coil (1) and interlocked by a ratchet arrangement (12, 13) in the longitudinal direction (L) and by a tongue and groove arrangement (10, 11) in a radial direction. To create an improved support coil, which is inexpensive to produce, reliably withstands exterior pressing forces and can easily be taken apart manually with low releasing forces and removed from the tubing material, it is proposed that the present invention has a rotation prevention means, through which adjacent turns (33) are held secure against rotation.