METHOD TO DETECT METAL HARDNESS ON OPERATING PIPELINE BY IMPACT-DYNAMIC DEVICE Russian patent published in 2016 - IPC G01N3/40 

FIELD: measurement equipment.

SUBSTANCE: whilst impacting the side surface of the pipeline, the measurement result is increased by a correction value, which is determined by product of relative difference of information parameter values measured in the reference pipe section of the same dimension type, whilst impacting the end of the section and its side surface, and actual hardness of the pipeline measured on its side surface, divided into the information parameter of hardness from impact at the end of the section, complying with the term of one direction of the longitudinal axis of the instrument, for all instances of device use on the existing pipeline and on the reference pipe section. Measurements are recalculated into values of static Brinell hardness number, in accordance with the tables from the instrument package.

EFFECT: increased accuracy of hardness measurement.

3 cl, 3 dwg