Publications
| Title | | Authors |
|---|---|
| Defects in girth welds – new test results, NDT experience, EPRG guidelines « back |
G Demofonti, M Fersini, G Knauf and W Schipaanboord |
| 11th PRCI/EPRG Joint Technical Meeting, Arlington, Virginia, April 1997 | |
| The EPRG guidelines on the assessment of defects in transmission pipeline girth welds were puhlished with the aim of providing pipeline Operators with uniform acceptance levels and defect iiiits. In order to extend the range of applicability of the current version of the guidelines, two experimental test Programmes were carried out involving full-scale bend, full scale tensile and wide plate tensile tests. The results of these tests appear to enable the guidelines to be extended in a second edition so that thinwalled pipes down to wall thicknesses of 5 mm (0.2 in) as well as girth welds involving internal offsets up to 2.5 rnm (0.1 in) can be taken into account. All the girth welds mechanically tested were subjected to non-destructive testing by various techniques. The results indicated that mechanized US inspection was successfully appiied and provided more accurate information on the configuration of the weld and on the weld defects than did the X-ray inspection. | |
| Paper request | |