The chosen technology and selection of welding materials should ensure that the weld has a ferrite content within the range of 2-8% for manual welding and up to 10% for automatic welding.
To measure the percentage of ferrite content in ferritic welds, the MP 30 device is commonly used. Calibration is done using a factory standard provided by the manufacturer, along with certification. Ferrite content control should be performed before conducting radiological inspection of the joint.
