Typical Challenges of Long Seam Weld Inspection

Inspecting a long seam—or axial—weld is challenging both acoustically and mechanically. From an acoustic standpoint, the tube geometry tends to defocalize the ultrasonic beam, reducing the potential imaging resolution. Long seam welds forged using the electrical resistance welding (ERW) manufacturing method are prone to difficult-to-detect defects such as vertical or hook cracks. An acquisition instrument, such as the OmniScan™ X3 flaw detector, that has to
Source: NDT