Style 54 Cast Split Sleeves are designed to completely enclose and repair defective screw collars, plain or butt bell & spigot joints and double-bell circumferential welded joints. Style 54 sleeves can also be used to repair holes and splits up to 8" in length on 2″, 3″ and 4″ steel pipe. Style 54 sleeves are of rugged construction to permit safe repairs on high-pressure transmission pipelines. Each sleeve is air-tested with 60 psi air pressure and 1000 psi hydrostatic pressure before shipment. The sleeves are shipped factory assembled with the end parts packed inside the sleeve body with the installation instructions. Style 73 Cast Repair Sleeves are  provide a fast, permanent repair on steel lines where moderate pressures are involved.