Why WPS need to be qualified?

If you own or work at a job shop you may have noticed an increase in the number of customers that require the use of qualified welding procedures to build their products. Some fabricators are even getting this request from long time customers who never required them in the past. So why is this? The purpose of having a welding procedure specification (WPS) is to give the welder detailed instructions on how to make a weld.  These instructions consist of parameters that need to be used such as amperage, voltage, travel speed, transverse and travel angles, gas flow rate, etc. … Continue reading Why WPS need to be qualified?