Abstract: A self propelled airless grit blast machine that travels on and along a pipeline pipe as it continuously blast cleans the outside of the pipe in advance of pipe coating and/or wrapping. The airless grit blast machine is mounted on a carriage having rollers some of which are driven for controlled driven advance along the pipe being shot grit blast cleaned. A shot grit blast cabinet with a plurality of motor driven airless blast wheels surrounds the pipe being grit blast cleaned in substantially a self contained unit also including a grit elevator system, air wash separator system, shot grit storage hopper, abrasive shot grit retaining seals, abrasive flow controls, and an operator platform with a control panel.

Abstract: An apparatus and method for heating and coating a section of a pipe comprising a plurality of induction type heaters supported in spaced circumferential relation around the pipe section, the heaters having relatively flat and hollow induction coils therein, the coils of the induction heaters being oriented in a cylindrical surface adjacent to, and parallel with, the surface of the pipe, a coating dispenser mounted between a pair of induction heaters for dispensing a coating material on the surface of the pipe, the heaters and dispenser being rotated as a single assembly around the pipe while simultaneously applying an alternating electric potential to the induction heaters to heat the pipe to a suitable application temperature for a coating material, the coating material being applied to the thus-heated pipe through the dispenser while continuing to rotate the assembly, water being passed through the copper coils to keep them cool during the heating of the pipe.