The Optimized NDT Techniques to Test Crack-Like Indications in the Root Pass of Weld Beads

Multi-NDT methods were introduced into analysis and evaluation of the detectable rate of crack-like indications on the root pass of welds. The NDT techniques were optimized from practicability and reliability by using welding progress and the welds being completed. Most of crack-like indications were eliminated so that quality and the security of the Hull was assured based on the integrate NDT methods.