METHOD TO RECOVER BEARING CAPACITY OF PIPELINE Russian patent published in 2014 - IPC F17D5/02 G01M7/08 

FIELD: testing equipment.

SUBSTANCE: method includes laboratory impact and compression-decompression tests according to the "stress-test" scheme of cylindrical samples with crack-like defects, modelling of conditions of pipe metal deformation under action of inner pressure in direction of main stress action. Using test results, they determine limit value of deformation providing for reserve of plasticity of pipe metal under conditions of action of circular stresses equal to 110% of the yield point. With account of results of laboratory tests they perform testing of a pipeline section for impact by method of "stress test" and recovery of its bearing capacity. Stressed-deformed condition and forecast term of safe operation of the repaired pipeline section is defined by calculations.

EFFECT: increased efficiency of pipeline major overhaul.

2 cl, 3 dwg, 2 tbl