NDTnet 1998 Aug, Vol.3 No.8

Abstract

The volume-joint fault detector is created in the Institute of Metal Phisics that provides the possibility to control the whole electric welded tube's body including the weld joint and the zone near the joint. By construction it consists of two independent units, one of them serves for magnetic fault detection of the upper half of tube and the other for the lower one. The construction difference between the mechanical parts of these units is conditioned by the difference of performed functions while their electronic parts are perfectly identical.

The thinfilm magnetosensitive elements (ME) produced by means of integral technology are used in this detector. ME are united into interchangeable blocks each detector with the of those is the independently functionating 16-elements fault control zone covering 16 mm. Depending on diameter of controlled tubes (from 20 to 114 mm) in a work take part from 6 to 24 electronic blocks, their information is received to common panel and from there to executive devices (tubes' sorter etc.) or to a fault marker and indicator devices. At the same time the signal of the fault comes in panel of the welder operating the tube-welding unit who effectively changes conditiones of welding untill the quality joint is obtained.

As a result of experimental and industrial exploitation of that volume-joint fault detector in factory conditions it is ascertained that its sensitivity corresponds to the highest level of sensitivity set up by standarts API, DIN and ASTM.

Abstract Source:
Book of Abstracts, 7th European Conference on Non-Destructive Testing, 26-29 May 1998, ISBN: 87-986898-0-00

Full-Text Source:
Proceedings of the 7th European Conference on Non-Destructive Testing, 26-29 May 1998, ISBN:

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