Substance of the problem
In production of welded large size goods, such as synthesis column in chemical industry, reactors of oil-refining industry, body of the cement furnace or kiln ets. the edges of joining shells need preheating before welding and thermal treatment after welding. The heating of such large size goods before and after welding can be realized in thermal furnaces of unique sizes with sizeable fuel and energy sources.
Technology and equipment for local thermal treatment of weld seams on large size goods by natural gas combustion have been developed. The technology manufacturing application provides energy resources consumption decrease and reduction of pollutant emissions.