Regularities of Changes in the Mechanical Characteristics and Electrical Properties of the Reaction Furnaces Coils Material during Operation

Abstract:

The main causes of early failure of reaction furnaces coils are diffusion processes in the material as a result of which structural changes occur, new phases are formed and void structure is formed in the surface layers of the metal, which has a negative effect on the mechanical characteristics. In this regard as a structurally sensitive method, which allows evaluating the changes occurring in the metal, the response parameters of the electrical signal are used which are sensitive to pore formation and allow predicting the zone of formation of the breaking crack. Fragments of the coils of the reaction furnaces from the radiant section, which were in operation for 750, 1300, 8000, and 10000 hours and the pipe element in the delivery condition were chosen as the objects of the study. As a result of the research a correlation between the amplitude of the first harmonic of the electrical signal output voltage with the results of static tests for tensile and impact bending was established. This happens due to the fact that during operation there is an increase in the relative impact viscosity and relative tensile strength, and the relative magnitude of the voltage amplitude of the first harmonic of the output electrical signal also increases. These results can be used as a method of mechanical properties assessment by non-destructive testing, and also they can be used to develop a criterion for the rejection of reaction furnace coils.

• Periodical: Materials Science Forum (Volume 992)
• Pages: 706-711
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.992.706
• Online since: May 2020
• Authors: E.A. Naumkin*, J.N. Shermatov
• Keywords: Coils, Electric Signal Amplitude, Impact Viscosity, Pyrolysis, Reaction Furnaces, Tensile Strength, Yield Stress

References

[1] N.A. Makhutov, A.G. Chirkova, A.V. Rubtsov, E.A Naumkin., U.P. Gaidukevich, Evaluation of the material strength of the reaction furnace coil tube from the action of internal pressure, Factory laboratory, Diagnostics of materials. 1 (2008) 58-62.

[2] H.J. Grabke, Corrosion by carbonaceous gases, carburization and metal dusting, and methods of prevention, Mater. High Temp. 17(4) (2000) 483–487.

DOI: 10.1179/mht.2000.063

[3] A. Reihani, R.D. Haghighi, Failure analysis and weld ability improvement of 35%Cr 45%Ni heat resistant alloy, Eng. Failure Anal. 52 (2015) 97–108.

DOI: 10.1016/j.engfailanal.2015.03.005

[4] N. Kasai, S. Ogawa, 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(3) (2010) 175–180.

DOI: 10.1007/s10921-010-0075-3

[5] 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.

[6] J. Wolf, Thermodynamics of excitons in semiconductors, In the collection Physics abroad,, M. Mir. (1983) 125-153.

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

DOI: 10.1016/j.engfailanal.2011.11.018

[8] 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.

DOI: 10.1016/j.engfailanal.2009.02.009

[9] N.R. Entus, Operation and repair of tubular furnaces of large unit capacity, M. TsNIITEneftekhim, (1975).

[10] A.P. Akshentseva, Metallography of corrosion-resistant steels and alloys. M. Metallurgiya. (1991).

[11] GOST 9454 - 78 Metals, Test method for impact bending at low, room and elevated temperatures, M. Publishing House of Standards, (1979).

[12] E.A. Naumkin, J.N. Shermatov, A.I. Gaysina, Distribution of Magnetic Field Parameters in the Surface Layer of the Material of Reaction Furnace Coils after Operation Period, Materials Science Forum. (2019) 653-659.

DOI: 10.4028/www.scientific.net/msf.945.653

[13] 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: 10.1007/s10921-010-0075-3

[14] 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: 10.1016/j.ndteint.2006.03.004

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

[16] GOST 1497-84 Metals, Tensile test method, M. Publishing House of Standards, (1984).

[17] I.R. Kuzeev, E.A Naumkin., A.N. Tepsaev, A.V. Samigullin, V.A. Gafarova, Forming the Response of an Electromagnetic Signal in the Process of Destruction of a Shell Structure, Scientific Works of Research and Design Institute of Neftegaz, SOCAR. (2015) 75-80.

DOI: 10.5510/ogp20150400264

[18] A.G. Chirkova, E.A. Naumkin, A.V. Rubtsov, U.P. Gaydukevich, Limiting condition of the reaction furnace coil tube, Izvestiya vysshyh uchebnyh zavedenyi, Neft i gaz. 5 (2007) 100-105.

[19] K.J. Stevens, A. Parbhu, J. Soltis, D. Stewart, Magnetic force microscopy of a carburized ethylene pyrolysis tube, J. Phys. D (Appl. Phys.). 36(2) (2003) 164–168.

DOI: 10.1088/0022-3727/36/2/315

[20] E.A. Naumkin, T.R. Bikbulatov, M.I. Kuzeev, Estimation of the limit state of steel by the parameters of an alternating electrical signal, Electronic scientific journal: Neftegazovoe delo. 5 (2011) 394-401.

[21] D.N. Shermatov, I.R. Kuzeev, E.A Naumkin, Changes in the magnetic field strength and impact viscosity of steel during long-term operation of reaction furnace coils, Neftegazovoe delo. 17(1) (2019) 99-106.

DOI: 10.17122/ngdelo-2019-1-99-106

[22] Heat-resistant materials for high-temperature equipment of petrochemical processes, M., TsNIITEneftekhim, (1978).

[23] Modern heat - resistant materials: Ref. ed. S. Mrovec, T. Werber. Trans. from Polish ed. Maslenkova S.B, M., Metallurgiya, (1986).