BIMETALLIC PIPE FOR CORROSIVE FLUIDS

摘要

The invention is a process for forming a bimetallic pipe having an outer steel shell and an inner lining resistant to corrosive fluids passing through the pipe, involving upsetting a steel ingot having a generally square outer cross-section and housing a generally circular cylindrical core of the lining material, the billet having a generally circular cylindrical outer cross-section after the upsetting, the upset billet then being axially pierced by a hot perforating tool. Also claimed is the resultant compound metallic body.