Rack for holding a set of tubes, in particular for forming a heat exchanger

A rack for holding a set of tubes, each of the tubes making up the set being provided with a helical outer fin, and said tubes being disposed in a rows of p tubes, the rows being delimited by support section members, the rack including transverse holding section members disposed between each row and longitudinal holding lugs secured to said transverse holding section members and engaged in gaps between the turns of the fins on the corresponding tubes, wherein:

• bars that are perpendicular to said transverse holding section members and that are secured via their ends to the support section members separate the p adjacent tubes in each of the n rows, the transverse holding section members being threaded through n-1 orifices provided in the bars, said bars and said section members forming a holding mesh;
• and
• the longitudinal holding lugs are constituted by separate brackets, each of which includes an engageable lug and at least one fastening tab for fastening it to said mesh.