Aptest NDT offers PMI testing services through experienced, trained personnel who can assure quality service. The material scan and testing can be performed on-site before the pieces go into service. It can be utilized on a variety of part sizes – from large complex parts to things as small as the weld fill material on the pieces.
Positive material identification (PMI) is performed using a handheld device. The device scans the metallic material using an emitted electromagnetic wave (X-ray fluorescence/XRF) and receives a reply that is analyzed as a spectrograph for key elements and the percentage of makeup of the elements in the compound.
Today, many major oil companies require that every pipe, flange, connector, valve and welding seam in critical parts of the plant be measured to verify that materials match engineering specifications. In addition to compatibility issues, several other reasons can exist for material specification including design, corrosion resistance, and compliance to codes and standards such as ASME Boiler and Pressure Vessel Code. It also finds applications in the following areas.