A problem is considered for the case of pipe filling with water in the assumption of axial symmetry of the geometrical and force loading parameters, when using a rigid- plastic model of the medium and a known method of reflected shock adiabats. It is shown, that the presence of liquid in the pipe leads to a significant lowering of its compression at explosion, which prevents applications of the traditional method of treatment by external explosive charges, mounted at a distance from the weld, to eliminate the residual stresses. Influence of the liquid turns out to be such, that it becomes possible to load the pipe directly in the weld, regarding the liquid as a kind of a support.
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