Formation of silicated layer of austenitic pipe steel with different pipe sizes

Abstract Tubular furnaces of hazardous production facilities are unique technical devices, and serve for open fire heating various process media to relatively high temperatures. Some the furnaces, such as pyrolysis hydrogen conversions also reactors that decompose hydrocarbon feedstock into separate components. The most important element structure is a tubular coil. effect temperatures working on coil metal inevitably leads degradation by forming defects, changing mechanical properties worse. One unfavorable moments considered saturation surface layers with carbon or another - carburization metal. When carburized, its embrittlement occurs probability brittle destruction increases. All this can lead frequent shutdown repairs significant costs. way contain active diffusion may be silicate elements using different silicating mixtures, since silicon effectively delay incorporation. In work, studies carried out peculiarities formation silicated layer in fragments pipes dimensions 160x6 mm, 32x2 57x4 mm made steel 08Kh18N10T depending holding time mixture.