Profile: Ally Steels Pvt. Ltd. is an importer & exporter of stainless steel. In this range, we include pipe & steel tube fitting, round bars, flange, stainless steel plate, sheet, pipe, and tube. Slip-on flange is a solid, circular pipe flange which is slipped over the end of a pipe and welded in. Our varied range of slip-on flanges includes slip-on flange, ansi slip-on flange, welding neck flange, stainless steel slip-on flanges, welded slip-on flange, and carbon steel slip-on flange.