| 摘要 |
A pipe bend for a pipeline for transporting abrasive materials, includes a pair of coupling collars having an outer ring, which has an outer circumferential anchoring groove, and an inner ring secured in the outer ring against axial displacement and made of a more wear-resistant material than the outer ring. Extending between the coupling collars is an arcuate outer pipe portion which is welded at both its ends to the outer rings of the coupling collars, and has a greater inner diameter than the outer rings. Extending at a radial distance to the outer pipe portion between the inner rings of the coupling collars is an arcuate inner pipe portion made of more wear-resistant material than the outer pipe portion and having opposite ends of an inner cross section in coaxial alignment to an inner cross section of the inner rings, for radial support upon the outer pipe portion.
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