Abstract: A remotely operable boiler tube wall cleaning and inspection system including a collapsible "H" frame capable of being inserted through the boiler manway access ports and being positioned at will over the full area of the tube wall.

Abstract: A method of inspecting a tube header bore comprises scoring an oxide scale layer within the bore using a hard scribing tool. The bore is then cleaned using one or more honing brushes having flexible bristles with carbide tips. After sufficiently cleaning the inner surface of the bore a florescent dye is applied to the surface for highlighting surface defects and a visual inspection is made. For easy access to the interior of the bore, the tube is cut at a point spaced from the bore. After the inspection is complete a new length of tube is connected such as by welding.

Abstract: A nozzle to header or pressure vessel connection includes a sleeve preferably of stainless steel extending within the bore of the nozzle and preferably cantilevered therefrom to extend into the aligned flow passage of the header. A portion of the sleeve preferably has an elliptical cross-section which traverses at least part of the distance of the bore and contacts the inner wall of the nozzle for press fitting of the sleeve to the nozzle.