Non-destructive testing
            
            
            
            
            
            
            
                
                    - Ultrasonic flaw detection for any defects inside parent metal and weld body.
                    
                    - Magnetic particle inspection for any surface defect and 1.5 mm below.
                    
                    
                    - Dye penetration inspection for defects open to surface.
                    
                    - Vacuum test for through over cracks.