TAPPI TIP 0402-18 presents practical guidance for obtaining accurate ultrasonic thickness measurements on black liquor recovery boiler tubes. The document covers safety precautions, equipment and transducer selection, calibration, surface preparation, technician qualification, data recording and verification, corrosion trending, and customized inspection planning. Part II provides default survey layouts for key boiler zones, including floors and waterwalls, while emphasizing that inspection programs should be adapted to each boiler's operating history and condition.
Application Scope: Intended for recovery boiler operators, inspection managers, nondestructive testing contractors, qualified UT technicians, and engineers responsible for boiler tube integrity assessments and outage inspection planning.
