| 2003 №06 (03) | 2003 №06 (05) |
The Paton Welding Journal, 2003, #6, 14-15 pages
Peculiarities of explosion treatment of the circumferential weld on pipe filled with liquid
V.G. Petushkov
E.O. Paton Electric Welding Institute of the NASU 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.Abstract
The problem is considered for a case of filling a pipe with water in an assumption of axial symmetry of geometric and force parameters of loading, using a stiff-plastic model of a medium and a known method of reflected shock adiabats. It is shown that the presence of liquid in the pipe leads to a substantial decrease in its explosion reduction, thus preventing the use of a traditional method of treatment with external explosive charges placed at a distance from the weld to relieve residual stresses. The effect of liquid is such that it becomes possible to load the pipe directly on the weld, the liquid acting as a kind of support.
Keywords: circumferential welds, pipelines, explosion treatment, shock adiabat, shock wave, reduction, residual stress relief
References
1. (1975) Explosion physics. Ed. by K.P. Stanyukovich. Moscow: Nauka.2. Makhnenko, V.I., Kudinov, V.M., Petushkov, V.G. et al. (1975) Calculation of the efficiency of decreasing residual stresses in circumferential welds by explosion treatment. Avtomatich. Svarka, 12, 6-8.
3. Petushkov, V.G., Fadeenko, Yu.I. (1999) Welding stress relief be explosion treatment. New York: Backbone.