International Science and Technology Journal

In this study, three different NDT techniques were used to inspect the welded joints: Radiographic testing RT (x-ray), Magnetic testing MT, and Penetrant testing PT. Acceptance criteria of three standards: British Standards BS, American Society of Mechanical Engineers ASME, and American Petroleum Institute API, have been applied on four types of defects of welded joints of steel pipes. The acceptance criteria of the four defects: cracks, porosity, undercut, and lack of root penetration were compared using the three NDT methods. In these three studies, we will study and compare the three of the international standards to find the optimum one for each defect. Comparison welding defects like crack, porosity, undercut, and lack of penetration by NDT testing: PT, MT, and X-ray according to international standards BS, ASME, API. The aim of this study to describe and discuss imperfections caused by arc welding in welding joints that are detected or inspected by NDT and to compare the acceptance and rejection limits of products based on the three standard codes studied in this research. Study and define NDT methods: PT, MT, X-ray. And define welding defects resulting from arc welding: cracks, porosity, undercut, lack of root penetration, in welding joints, understand and compare international standards ASME, API, BS Quality control and accepting criteria of welding defects.