02:22 Aug-17-2001 Ken Head Senior Level III USA, Joined Jan 2000 14
Re: Defect terms : what is Hollow bead and underbead piping???/ .
Hollow bead is a term (mainly used in the pipeline industry) for linear porosity which occurs in the root pass of an open root weld. Im not real sure exactly what "underbead piping" never have used that one