PSI - Issue 40

Vladlen Nazarov et al. / Procedia Structural Integrity 40 (2022) 341–347 Vladlen Nazarov / Structural Integrity Procedia 00 (2022) 000 – 000

347

7

    

 , c t t t c t h eq h eq h ,

h

 t t

h

(15)

c



 r a

h

Boundary condition at the outer radius

h

c



(16)

0



 r b r



The diffusion equation, two boundary conditions and one initial condition for the methane concentration make it possible to calculate the current value of the methane concentration at each point of an arbitrary radius of a steel cylindrical tube under internal hydrogen pressure. 5. Conclusion It is shown that the dependence for porosity can be used to describe the process of hydrogen corrosion of a steel cylindrical tube. The proposed model for describing the process of hydrogen corrosion should be used when calculating the service life of a reactor for generating steam with high pressure and temperature parameters. Acknowledgements This work was partially supported by the Russian Foundation for Basic Research (grant 20−08−00387). References Bebelin, I., 1997. Development and Research of Experimental Mental Hydrogen Oxygen Steam Generator of P ower 10 MW. Thermal Power E ngineering 8, 48 – 52. Bogomolov , A., Pribaturin, N., Temnikova, E., 2011. Analysis of Technologies for O btaining Juice T emperature Water Vapour. Bulletin of Kuzbass State Technical University 2, 71 – 75. Bhatnagar, N. , Arya , V., 1974. Large Strain Creep Analysis of Thick Walled C ylinder s. International Journal of Non linear Mechanics 9, 127 – 140. Gagandeep , S. , Tejeet, S. , Harwinder, S., 2020. Creep Analysis in Thick Composite Cylinder Considering Large Strain. Journal of the Brazilian Society of Mechanica l Sciences and Engineering 42. Gupta, S., Pathak , S., 2001. Thermo Creep Transition in a Thick Walled Circular Cylinder under Internal Pressure. Indian Journal of Pure and Applied Mathematics 32( 2 ), 237 – 253. King, R. , Mackie , W., 1967. Creep of Thick Walled Cylinders. Journal o f Basic Engineering 89( 4 ), 877 – 884. N atan, M., Johnson, H., 1983. An Experimental Investigation of the Internal Methane Pressure in Hydrogen Attack. Metallurgical Transactions A 14, 963 – 971. Nazarov, V., 2014a. Strains of the Cylindrical Tube. Industrial Laboratory. Diagnostics of Materials 80(8), 56 – 58. Nazarov, V., 2014b. Features of High Temperature Hydrogen Corrosion of the Steel Cylindrical Tube. Industrial Laboratory. Diagnostic s of Materials 80(11), 58 – 61. Nazarov, V., 2016. Kinematic Relations for Axisymmetric Plastic Strains of the Porous Cylindrical Tube. Bulletin of the Volgog rad State Technical University 15, 85 – 88. Shannon, B., Jaske, C., 2004. AComprehensive Approach to Reformer Tube Inspection and Assessment. Proceedings of NDT.net. 9(06). Sharma , S., Sharma , R., Panchal , R., 2018. Creep Transition in Transversely Isotropic Circular Cylinder Subjected to Internal Pressure. International Journal of Pure and Applied Mathematics 120(1), 87 – 96. Singh, T., Gupta, V., 2010. Modeling Steady State Creep in Functionally Graded Thick Cylinder Subjected to Internal Pressure. Journal of Composite Materials 44(11), 1317−1333.