DEVICE FOR LEAKAGE TESTING OF PIPES IN PIPE PLATES IN HEAT-EXCHANGE APPARATUS Russian patent published in 1994 - IPC

FIELD: leakage test. SUBSTANCE: movable heads 3 are shifted along the guides 4 relatively case 1 for required distance. Sealing element 2 is mounted onto tube plate 6 close to tube to be tested, collars 9 are mounted inside the cavities of tubes 10. Working medium is applied into subpiston parts of hydraulic cylinders 5, in this case collars 9 are compressed by rest heads 7, pressing to internal surfaces of the tubes and fixing the device inside them. Test medium is supplied into tested tube 11 and tightness of the tube is measured. EFFECT: improved reliability. 2 dwg