Tube trailers assembled with large capacity hoop-wrapped composite cylinder of steel liner (i.e., large capacity type 2 tube (LCT2T)) have shown an increasing trend in China. It is an urgent issue to detect nondestructively the defects of cuts, scratches and voids on the composite overwrap, and corrosion, cracks or other defects on the steel liner during their use and manufacturing processes. In this paper, the double-wall single-image technique of X-ray digital radiography (DR) method was studied for the typical defects on the large capacity type 2 tube by making specimens of cracks and pitting corrosion on the steel liner, as well as cuts, scratches and void defects on the composite overwrap. The optimal penetration parameter was selected based on the identification of image quality indicators (IQI), and the detection sensitivity of the DR method for the typical defects on the large capacity type 2 tube was obtained. The results showed that the above-mentioned artificial defects were effectively detected with double-wall single-image technique, and this technique had a higher detection sensitivity to longitudinal defects on the composite overwrap of the LCT2T than that to circumferential defects, as well as the detection sensitivity of steel liner defects was higher than that of composite overwrap defects.


Experimental Studies of Typical Defects on Large Capacity Hoop-Wrapped Composite Cylinder of Steel Liner Based on X-Ray Digital Radiography Test

Division / Sponsors: 
Pressure Vessels & Piping (PVP)


Paper Proceedings: https://asmedigitalcollection.asme.org/PVP/PVP2020/volume/83815

PVP2020 - Virtual Conference

Supporting the need among researchers worldwide for additional online and multimedia content, ASME now offers the ASME Conference Video Collection. This platform will collect and provide long-term access to conference presentation videos, encompassing all technology areas within ASME's technical conference and events program. About 30,000-40,000 engineers across all mechanical engineering and related disciplines participate in ASME conferences each year. This includes authors of approximately 6,000 to 8,000 technical papers published by ASME, the majority of whom also submit video presentations for our virtual conferences. The video collection will be available as an add-on to existing product packages or as a separate subscription.