The weld seam detection in tubes is a difficult subject because of the many variables involved:

» the welding method
» the type of material used: regular mild steel, highly alloyed steel, magnetic or nonmagnetic stainless steel and, of course, all types of  high-strength steels being used primarily in the automotive industry
» the wall thickness of the tube, e.g. magnetic flux leakage methods are limited by the depths of their wall thickness penetration
» the type of treatment that the welded tube received, e.g. annealing or coating
» That is the reason why ROLAND ELECTRONIC has the proven system SND40 for maximum flexibility in Weld Seam Detection.