The pipe line which carries crude petroleum or chemical is vulnerable to internal and external corrosion. The cracking of the pipe due to withering by the environment . Due to flaws in the pipe while manufacturing . If a pipeline carrying water leaks and bursts, it can be a problem but it doesn’t harm the environment. However, if a petroleum or chemical pipeline leaks, it can be a environmental disaster. In an attempt to keep pipelines operating safely, periodic inspections are performed to find flaws and damage before they become cause for concern. When a pipeline is built, inspection personnel may use Visual, Radiographic,Mmagnetic Particle, Ultrasonic and other inspection methods to evaluate the welds and ensure that they are of high quality.