TESTING TECHNOLOGY OF THE UNDERCOUPLING SPACE FILLING OF COUPLING ON THE MAIN PIPELINE

Background. Now actively used the method of repair with use coupling metal structure. It is to restore carrying capacity active pipelines that are working for a long time.
 The installed on defective area, and undercoupling space sealed filled under pressure self-hardening mass. In this case, stresses in pipe walls aligned each other. parameters filling process determine quality entire require precise testing.
 Objective. purpose article analyze testing under-coupling using ultrasonic non-destructive methods.
 Methods. Strength improvement spots pipeline realized by installing an main couplings. Strengthening redistribute part load from wall coupling, which leads decrease stress level wall. reinforcement efficiency could be evaluated degree reduction circumferential repaired pipe. describes analysis possibility glues-welded brazed-welded couplings methods Results. most common piezoelectric transducers ineffective. This due high temperature during molten metal, determined its melting temperature. it proposed electromagnetic (EMA) transducer as radiator receiver vibrations. results theoretical experimental studies control soldered-on sleeves have confirmed effectiveness EMA-method controlling formation space. shown allows achieve maximum metal.
 Conclusions. substance showed glueswelded both compounded