Single layer hardened conveying pipe. The hardness in the inner pipe reaches up to 45 HRC and decreases linearly through the pipe wall to the outside. Tapered outer geometry of weld-on collars provides centering in the joint. Grounding lugs for dissipating static charges. Coupling with one screw and flat collar face for quick replacement during service. Designed for low wear. The coupling mechanism features a single screw and flat collar face, enabling swift and hassle-free replacement during service or maintenance.