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Summary form only given. In the paper we present development results of a 3D magnetohydrodynamic code in STCP RFNC-VNIIEF, intended to simulate an implosion process both of annular solid and of multi-wire single-and nested arrays, having an angular periodical structure. Solution of magnetohydrodynamic equations is carried out with stationary nonuniform Eulerian grid built in a wedge-like spatial area using a cylindrical coordinate system. Maxwell equations are agreed with equations of an electro-technical circuit of current pulse driver. Radiation losses are not considered in the present version of the FLUX-3D code. An example of numerical calculation of the Z-pinch experiment Shot 48 on the Z-machine is presented.