Restrict it to headers prone to service-related deterioration and to areas on them where a row of tube holes substantially overlaps or bisects a circumferential butt weld (Figure 1). Recent ...

In one supercritical boiler, the Alloy 33 weld overlay sample was removed after 34 months and the tube panel’s bare ends were found to have circumferential cracks. While the SA213-T11 (1/¼ Cr ...

As a result, even the circumferential welds joining ring sections are located above and below the active core, limiting their exposure to neutron fluence. The welding technologies applied to make ...

DRW also allows the use of dissimilar materials to optimise cost and performance. It can create leak-tight joints with uniform circumferential weld strength and can be applied to tubular structures ...

The design of the weld transition made the pipe in that location more susceptible to bending. "This resulted in the initiation of a circumferential crack in the weld, which led to failure through ...