Productivity & Reliability Study of Non Destructive testing techniques for Inspection of structural welds in Construction industry

Research output: Conference Papers (RGC: 31A, 31B, 32, 33)33_Other conference paperpeer-review

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Original languageEnglish
Publication statusPresented - 1 Jul 2016


The aim of this study is to evaluate the productivity & reliability of non-destructive test (NDT) techniques for the inspection of structural welds employed in the Hong Kong Construction Industry. Manual Ultrasonic Pulse echo method and semi-automatic ultrasonic techniques using Phased Array Ultrasonic testing (PAUT), Radiographic Testing were employed. Five classes of defects were analysed: lack of penetration (LP), lack of fusion (LF), Crack (CR), Porosity (PO) and Slag Inclusion (SI). The tests were carried out on specimen made from structural plate, on which artefacts were inserted on the weld metal. The results were being studied to determine the reliability of inspection by PAUT for defect detection compared with the Manual Ultrasonic tests. The productivity of PAUT test is also compared with conventional ultrasonic testing at a determined rate.