What type of seam welds will it inspect?
ERW Welds – All ERW pipe manufactured prior to 1970 is prone to manufacturing defects within the weld area due to the DC or low frequency welding techniques used at that time. Better high frequency AC techniques were employed after 1970. SAW Welds – Submerged arc welded pipe tends to be concentrated in the larger pipe diameters. Some pipe can exhibit manufacturing problems such as lack of fusion of the root weld. Flash Butt Welds – Flash butt welded pipe was produced by forcing together two square plate edges and the resultant flow of metal runs radially both outwards and inwards. Any faults in this method start on the plate edges and end in the center of the weld running outwards or inwards. This manufacturing process is now discontinued.
