Technical Committee Pipelines

Effects of laminations in pipes to resistance and working life of pipelines

The effect of load cycles on pipes with laminations was examined to obtain information about the effects on resistance and working life.
Material tests carried out in connection with treshold load tests showed that laminations or also segregations in pipes welded with longitudinal seams always run parallel to the surface and that even with the slight enlargement that sometimes occurs under treshold loading, resistance and working life are not reduced.