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Calculations of the strength of members of heat-exchanging equipment working under a pressure of up to i0 MPa are carried out in accordance with the branch standard [i]. The Scientific-Research Institute of Chemical Engineering in Irkutsk developed a method of calculating thick-wall tube plates on the basis of solving the axisymmetric problem of the theory of elasticity by the finite element method [2]. In this method, the tube plate is regarded as a nonuniform elastic body with the elasticity modulus E and Poisson's ratio ~ in the solid region, and the corrected elasticity modulus E* and Poisson's ratio ~* in the perforated region.In applying the finite element method, the examined region (section of the component by the plane passing through the axis of symmetry) is divided into finite triangular elements. The dependence of displacements on the coordinates within the finite element is assumed to be linear. In this case, the axisymmetric problem of the elasticity theory is reduced to solving a system of linear algebraic equations [2, 3] { 6) = where [K] is the stiffness matrix of the examined region: {~} is the vector of displacements of the nodes of the finite elements in the examined region; {R} is the vector of external nodal forces.For a separate triangular element, the stiffness matrix is determined using the following dependences:For the perforated region