High Temperature Hydrogen Attack (HTHA) is a targeted inspection method used on plant equipment susceptible to hydrogen-related degradation at high temperatures. This defect was historically difficult to detect from an inspection standpoint. However, with advancements in technology, we now have the tools to accurately detect and size this highly detrimental defect.

EXCEL TECH Industrial Services Co. Ltd. performs HTHA inspections using a pitch-catch ultrasonic mode of propagation, utilising Time of Flight Diffraction (ToFD) to precisely locate and size defects.