The invention relates to a conveyor system for conveying preforms in a device for blow-forming finished containers, wherein the conveyor system comprises a conveyor chain, the chain links of which comprise a carrying element and a conveyor element, the conveyor system being characterized in that the conveyor element comprises a support structure and the carrying element comprises a mounting structure and at least some sections of the support structure and the mounting structure are designed and arranged to complement one another. Both the support structure of the conveyor element and the mounting structure of the carrying element comprise at least one connecting element, at least some sections of each connecting element being configured and arranged to complement one another, and the conveyor system is further configured to handoff the preforms to carrying elements for conveying said preforms through a heating section and to remove the preforms from the carrying elements after said preforms have been conveyed through the heating section. In addition, the invention also relates to a device for blow-forming finished containers from preforms, in particular from preforms made of a thermoplastic material, the device comprising at least one heating system for thermally conditioning the preforms along a transport path and at least one forming device for forming thermally conditioned preforms into the finished container, characterized in that the device comprises at least one conveyor system for conveying preforms according to the invention, the conveyor system being disposed in particular in the area of the heating device. Lastly, the invention also relates to the use of such a conveyor system and a method for the replacement of at least one carrying element.