Home page » Services » Repair of failing reinforced concrete pipes of different cross-sections (sleeving) Repair of failing reinforced concrete pipes of different cross-sections (sleeving). Method “sleeving” enables to repair failing reinforced concrete, steel, stone- or brick-masonry pipes of different cross-sections by inserting a corrugated “sleeve” into passage of the failing pipe for th whole projected length. The “sleeve” cross-section is as close as possible to the failing pipe cross-section to prevent flow rate reducing. The gap between the “sleeve” and the failing pipe is filled with concrete. The “sleeving” works are conducted without stopping traffic at a road or a railroad.