Abstract
Specifications require that all the welds in 12-m-diam. decomposers with a capacity of 3600 m3 be subjected to high-temperature tempering before going into service in order to alleviate the stresses from the welding operation. Specialists at the organizations VNIIPTkhimnefteapparatury and VNIImontazhspetsstroi have proposed out-of-furnace volumetric (complete) of the assembled decomposer with the use of special heaters. The use of this heating method has shortened assembly operations while providing the welds with a highquality heat treatment and reducing the stresses overall (including welding stresses, stresses from assembly of the decomposer, etc.) The technology ensures uniform heating of the housing of the decomposer and provides for close control over the process. The experience gained in heat-treating decomposers can also be used in the construction of other containers that come into contact with corrosive media.
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References
O. K. Steklov, V. I. Artem’ev, V. G. Leensok, et al., Alkali Brittleness and Improving the Durability of Equipment Used in Alumina Processing [in Russian], TsNIITÉItsvetmet, Moscow (1971).
V. T. Kir’yanov, N. I. Babkin, V. A. Lyudmilin, et al., “Flow-line method of assembling decomposers, ” Montazh. Spets. Rabot. Stroit., No. 3 (1972).
P. M. Korol’kov, “Characteristics and area of application of different methods of reducing the level of welding stresses in structures,” Ekspress-Inf. Ser. Montzh. Oborud. Truboprov., TsBNTI Minmontazhspetsstroya SSSR, No. 16.
P. M. Korol’kov, Heat Treatment of Welds [in Russian], Ékotekhnologiya, Kiev (2003).
OST 26-291-94, Welded Steel Vessels and Equipment. Specifications, NPO OBT, Moscow (1994).
PB 03-576-03, Regulations on the Assembly and Safe Operation of Pressure Vessels, Gosgortekhnadzor Rossii, Moscow (2005).
V. A. Babkin, A. I. Lavrov, P. B. Lovyrev, et al., “Technical procedures in the volumetric heat treatment of housings by interior heating,” Khim. Tekh., No. 2 (2005).
RTM 26-44-82, Heat Treatment of Petrochemical Equipment and Components, VNIIPTkhimnefteapparatury, Volgograd (1983).
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Translated from Metallurg, No. 3, pp. 61–64, March, 2006.
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Lovyrev, P.B., Lavrov, A.I., Babkin, V.A. et al. Volumetric out-of-furnace heat treatment of 3600-M3 decomposers. Metallurgist 50, 152–157 (2006). https://doi.org/10.1007/s11015-006-0056-z
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DOI: https://doi.org/10.1007/s11015-006-0056-z