NDT for PE Welds

I noticed noone has answered your inquiry. You might search for past threads on other forums e.g. http://eng-tips.com/viewthread.cfm?qid=120281 , http://eng-tips.com/viewthread.cfm?qid=133832 and http://eng-tips.com/viewthread.cfm?qid=229425 etc. (I think at one time some alleged experts referred to such piping as "jointless", and/or you could be assured welds of same did not have defects just by looking at the outer bead shape etc. – not sure that these claims are flying as well now!)