NON-DESTRUCTIVE INSPECTION OF GIRTH WELDS BY PHASED ARRAY AND TOFD METHODS

Mehmet Çağırıcı
799 681

Abstract


In pipeline steels, which are generally made of low-carbon and low alloy high strength steels to meet the requirements, girth welds are used to join the pipes. Submerged arc welding (SAW), semi-automatic or fully automatic welding system, is used to obtain better welding quality. The parameters and used equipment changes with regards to the desired properties, i.e. pipe diameter and wall thickness. Ultrasonic phased array and combined inspection systems, i.e. TOFD, have many significant advantages over conventional methods for pipeline inspection. The ad-vantages can be better interpretation, higher detection rates, no chemical wastes, no safety hazards and no requirement the specific area for inspection. Trend in the inspection system is decreasing the inspection time and increasing the detection sensitivity. Automatic systems, i.e. PipeWizard, become popular with increasing demands.

Keywords


PipeWIZARD, Phased Array UT, TOFD, Girth Welds, NDT

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References


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