Section 2(xxxiv) in The Static and Mobile Pressure Vessels (Unfired) Rules, 2016
(xxxiv)"NDT" means Non Destructive Testing methods like Dye Penetration Inspection, Magnetic Particle Inspection, Ultrasonic thickness checks, Ultrasonic Flaw Detection, Radiography and other relevant Inspection procedures carried out to detect the defects in the welds and parent metal of the pressure vessel;
