Distribution of Magnetic Field Parameters in the Surface Layer of the Material of Reaction Furnace Coils after Operation Period

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One of the main reasons for the limited service life period of the reaction furnace coils is the carburization of the surface layers, which leads to a decrease in the performance characteristics of the pipe material, decrease in plasticity, generation of internal stresses, change in the metal structure. Therefore, monitoring the state of coils surface in order to detect critical parameters of the carburized layer thickness, using non-destructive methods of control is relevant. The results of the distribution of magnetic parameters over the depth of the carburized layer in the fragments of pipes made of steel 20Х25Н20C2, operated under furnace conditions at high temperatures, for 1300, 6000, 8000, 10000 hours are presented in the article. Analysis of the results showed that the magnetic properties are manifested only in the surface layers of the reaction furnace tubes. At the same time, the longer the service life period, the deeper is the layer exercising the magnetic properties and the higher in this layer the values ​of the constant magnetic field intensity. Analysis of magnetic properties distribution in all studied pipe fragments, both from the inner and from the outer side, showed the non-uniformity of the constant magnetic field intensity distribution, while zones of extremely high values ​are observed. The layer-by-layer surface removal in these zones with the determination of the resultant constant magnetic field intensity showed that there are critical values of the carburization depth, after which a sharp increase of this parameter is registered. These results can be used as a method for carburization depth determination, and also used to develop criterion for rejecting coils of reaction furnaces.

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Edited by:

Dr. Denis Solovev

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653-659

Citation:

E.A. Naumkin et al., "Distribution of Magnetic Field Parameters in the Surface Layer of the Material of Reaction Furnace Coils after Operation Period", Materials Science Forum, Vol. 945, pp. 653-659, 2019

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February 2019

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[1] A.I. Gaysina, E.A. Naumkin, J.N. Shermatov, Analysis of the problem of existing methods of furnace coils cleaning. -World Science: problems and innovations: collection of articles of the IV International research to practice conference. Penza. International Center of Scientific Cooperation Science and Education,. (2016).

[2] A.G. Chirkova, E.A. Naumkin, A.V. Rubtsov, U.P. Gaidukevich, Reaction furnace coil pipe limiting state. Bulletin of Higher Educational Institutions. Oil and gas Publishing house. Tyumen. Industrial University (Tyumen). 5 (2007) 100-105.

[3] S.H. Khodamorad, D. Fatmehsari Haghshenas, H. Rezaei, A. Sadeghipour, Analysis of ethylene cracking furnace tubes. Eng Fail Anal. 21 (2012) 1–8.

DOI: https://doi.org/10.1016/j.engfailanal.2011.11.018

[4] K. Guan, H. Xu, Z. Wang, Analysis of failed ethylene cracking tubes. Eng Fail Anal. 12 (2005) 20–31.

[5] H.M. Tawancy, Degradation of mechanical strength of pyrolysis furnace tubes by high temperature carburization in a petrochemical plant. Eng Fail Anal. 16 (2009) 79–85.

[6] A. Chauhan, M. Anwar, K. Montero, H. White, Si W., Internal carburization and carbide precipitation in Fe–Ni–Cr alloy tubing retired from ethylene pyrolysis service. J Phase Eqilib Diffus 27 (2006) 84–90.

DOI: https://doi.org/10.1361/154770306x153747

[7] A. Ul-Hamid, H.M. Tawancy, A.-R.I. Mohammed, N.M. Abbas, Failure analysis of furnace radiant tubes exposed to excessive temperature. Eng. Fail. Anal. 13 (6) (2006) 1005–1021.

DOI: https://doi.org/10.1016/j.engfailanal.2005.04.003

[8] J. Luis Otegui, J. De Bona, P.G. Fazzini, Effect of coking in massive failure of tubes in an ethylene cracking furnace. Eng. Fail. Anal. 48 (2015) 201–209.

DOI: https://doi.org/10.1016/j.engfailanal.2014.11.004

[9] X.Q. Wu, H.M. Jing, Y.G. Zheng, Z.M. Yao, W. Ke, Coking of Hp tubes in ethylene steam cracking plant and its mitigation. Br. Corros. J. 36 (2) (2001) 121-126.

DOI: https://doi.org/10.1179/000705901101501541

[10] Mukhina T.N., Barabanov N.L., Babash S.E. et al., Raw hydrocarbons pyrolysis. M. Chemistry. (1987).

[11] R. Petkovicluton, T.A. Ramanarayanan, Mixed-oxidant attack of high-temperature alloys in carbon-containing and oxygen-containing environments. Oxid. Met. 34 (5–6) (1990) 381–400.

DOI: https://doi.org/10.1007/bf00664423

[12] N.R. Entus, V.V. Sharikhin, Tube furnaces in oil-refining and petrochemical industry. M. Chemistry. (1987).

[13] X.Q. Wu, Y.S. Yang, Q. Zhan, Z.Q. Hu, Structure degradation of 25cr35ni heat-resistant tube associated with surface coking and internal carburization. J. Mater. Eng. Perform. 7 (5) (1998) 667–672.

DOI: https://doi.org/10.1361/105994998770347549

[14] A.A. Kaya, Microstructure of HK40 alloy after high-temperature service in oxidizing/carburizing environment – II. Carburization and carbide transformations. Mater. Charact. 49 (1) (2002) 23–34.

DOI: https://doi.org/10.1016/s1044-5803(02)00284-x

[15] Yu.E. Ugaste, V.Ya. Zhuravska, Diffusion and phase formation processes in metal systems.- Krasnoyarsk. Krasnoyarsk University Publishing house. (1985).

[16] P.I. Melnik, Iron diffusion saturation and solid phase transformations in alloys. M. Metallurgy. (1993).

[17] O.A. Chekenev, E.A. Naumkin, Determination of the depth of steel 20Х23Н18 high-temperature carburization when in contact with coke. Oil and Gas Engineering. Publishing house: Ufa State Petroleum Technological University (Ufa). 6 (1) (2008) 123-125.

[18] I.R. Kuzeev, E.A. Naumkin, A.G. Sungatullina, T.M. Kuchukov, Formation of reaction furnace coil tubes destruction focal points. Oil and Gas Engineering: scientific and technical journal/USPTU. 13 (3) (2015) 181-186.

[19] N. Kasai, S. Owaga, T. Oikawa, K. Sekine, K. Hasegawa, Detection of carburization in ethylene pyrolysis furnace tubes by a C core probe with Magnetization. J Nondestruct Eval. 29 (2010) 175–80.

DOI: https://doi.org/10.1007/s10921-010-0075-3

[20] I.C. da Silva, R.S. da Silva, J.M.A. Rebello, A.C. Bruno, T.F. Silveira, Characterization of carburization of HP steels by non-destructive magnetic testing. NDT&E Int. 39 (2006) 69–77.

DOI: https://doi.org/10.1016/j.ndteint.2006.03.004

[21] I.C. Silva, J.M.A. Rebello, A.C. Bruno, P.J. Jacques, B. Nysten, J..Dille, Structural and magnetic characterization of a carburized cast austenitic steel. J Scripta Mater. 59 (2008) 1010–3.

DOI: https://doi.org/10.1016/j.scriptamat.2008.07.015

[22] Pengju Guo, Tao Chen, Xiaoming Lian, Juan Ye, Xuedong Chen, Detection of Cracks in 25Cr35NiNb Ethylene Pyrolysis Furnace Tubes by Metal Magnetic Memory Technique Journal of Pressure Vessel Technology. 139(2) (2017) 024501-1-4.

DOI: https://doi.org/10.1115/1.4035694

[23] A.G. Chirkova, A.S. Simarchuk, On local defects development in pyrolysis furnace tube coil. Global community: issues and ways of solution. USPTU. 14 (2003) 143-145.

[24] V.T. Vlasov, A.A. Dubov, Physical basis of the method of metal magnetic memory. Publishing house. TISSO, CJSC. Moscow city. (2004).

[25] Guo Jingfeng, Cheng Congqian, Li Huifang, Jie Zhao, Min Xiaohua. Microstructural analysis of Cr35Ni45Nb heat-resistant steel after a five-year service in pyrolysis furnace: Engineering Failure Analysis. 79 (2017) 625–633.

DOI: https://doi.org/10.1016/j.engfailanal.2017.05.014

[26] R. Petkovic-Luton, T.A. Ramanarayanan. Mixed-Oxidant Attack of High-Temperature Alloys in Carbon- and Oxygen-Containing Environments. (1990) 382-400.

DOI: https://doi.org/10.1007/bf00664423