Inspection of serpentine or arbor coils in process fired heaters is difficult using conventional NDT methods. Quest Integrity offers a comprehensive solution with its furnace tube inspection system, or FTIS, and advanced engineering assessment capabilities. FTIS is an intelligent pig that quickly and accurately inspects the convection and radiant coil sections of fired heaters per API Recommended Practice 573. It is an ultrasonic inspection technology that is launched following the mechanical cleaning, or decoking of the furnace coil’s interior surface.
FTIS detects and measures existing damage mechanisms such as internal or external corrosion, erosion and pitting, along with deformation such as bulging, swelling and ovality in serpentine or arbor coils. These damage mechanisms are quickly identified and quantified in an inspection report and an onsite preliminary assessment is typically delivered within 24 hours of the inspection. Based on the inspection results, an advanced engineering assessment using the company’s proprietary software, LifeQuest™ Heater, calculates the remaining life and fitness-for-service of the fired heater tubes in accordance to the API 579 / ASME FFS-1 standards. Accurate corrosion rate information helps decrease the risk of failure and helps operators improve extended run times, which translates to increased fired heater efficiency and reliability.