Seamless Pipe Manufacturing and Tube Forming

A typical flaw in a seamless tube is the rounded shape internal defect, also called a round-bottom groove (RBG). These defects can originate during the seamless pipe manufacturing process or after tube forming. Inspectors need to identify and assess these marks on pipes used in the oil and gas industry.

Rounded shape internal defects are similar to wall thickness reduction, but they behave differently with ultrasonic testing (UT). As a result, these defects
Source: NDT