NDE has evolved as an essential demand in much modern engineering equipment’s like Heat Exchangers, Marine Industries and Oil Refineries. The performance levels and reliability of the NDE is more important to the end use of the object being inspected. Failure is the primary threat to the integrity, safety and performance of marine structure. Duplex Steel-2205 of dimensions 200X170X12 weldments are chosen for this project in view of its applications in heat exchangers, marine and oil refineries. It was taken for this project in the form of plate and welded by Tungsten Inert Gas welding (TIG). The basic NDT experimental methods such as Liquid Penetrating Test, Magnetic Particle Test, Ultrasonic Test, and Radiography Test are chosen for quality assurance of the materials. Penetrant testing for to surface defects, Ultrasonic testing to detect the subsurface and internal defects, Gamma-Ray Radiography for internal defects. The results from methods were analysed. Surface defects were detected by penetrant testing and internal defects like inclusions, blow holes, porosity, lack of penetration were detected by both Radiography testing and Ultrasonic testing.
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