Ultrasonic Testing for Shell & Tube Heat Exchangers
Specialized Ultrasonic Testing programs for Shell & Tube Heat Exchanger Reliability & Maintenance.
Why it matters
Key Benefits
Leak Detection
Airborne ultrasonic detection identifies pressure and vacuum leaks in shell and tube heat exchangers systems that are inaudible to the human ear. Locating leaks quickly reduces energy waste and prevents process quality problems.
Bearing Lubrication Optimization
Ultrasonic monitoring of shell and tube heat exchangers bearings provides real-time feedback during grease application to prevent both under-lubrication and over-lubrication. Proper lubrication extends bearing life and reduces friction-related energy losses.
Early-Stage Fault Detection
Contact ultrasonic measurements on shell and tube heat exchangers detect high-frequency stress waves generated by metal-to-metal contact, friction, and impacts in the tube bundle, shell, baffles, tube sheets, and expansion joints. These signals appear weeks before vibration amplitude increases detectably.
Context
Challenge & Approach
The Reliability Challenge
Heat exchanger tube wall thickness measurement requires internal tube access with specialized small-diameter IRIS (Internal Rotating Inspection System) or RFET probes for in-situ inspection, or external measurements on accessible tube ends. Tubesheet weld quality inspection requires phased array or TOFD techniques for volumetric examination through thick sections. Shell thickness mapping must account for under-insulation corrosion that may be localized. Nozzle-to-shell weld examinations require angle beam techniques for full volumetric coverage. Tube-side and shell-side deposits affect ultrasonic coupling and measurement accuracy. Tube material and diameter variations require calibration adjustments. Internal erosion patterns from impingement are localized and may be missed by spot-check measurements.
Our Approach
We perform ultrasonic thickness measurements on exchanger shells using a grid pattern that captures minimum wall thickness and corrosion distribution. Nozzle-to-shell welds are examined using angle beam or phased array techniques per ASME Section V requirements. Tubesheet thickness and weld quality are assessed using straight-beam and angle-beam methods. For tube inspection, we deploy IRIS probes or conventional UT measurements at tube ends to detect wall thinning from corrosion and erosion. We map thickness data against exchanger drawings to identify corrosion and erosion patterns related to flow distribution. Remaining life calculations are based on measured corrosion rates and minimum wall thickness per ASME Section VIII and API 510 requirements. Reports include thickness data maps, corrosion rate calculations, remaining life estimates, and re-inspection interval recommendations.
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Learn More →Ultrasonic testing detects bearing faults, lubrication deficiencies, internal leakage, and electrical discharge in shell and tube heat exchangers. Airborne ultrasonic detection locates pressure and vacuum leaks at joints, seals, and connections. Contact ultrasonic measurements identify early-stage metal fatigue and friction before vibration levels increase measurably.
Ultrasonic testing detects high-frequency stress waves that appear earlier in the fault progression than vibration amplitude increases in shell and tube heat exchangers. It is most sensitive to friction, impact, and turbulent flow, while vibration analysis excels at identifying specific fault types through frequency patterns. The two technologies are complementary rather than interchangeable for monitoring shell and tube heat exchangers.
Ultrasonic testing is effective on rotating and reciprocating components, pressure boundaries, and electrical systems associated with shell and tube heat exchangers. It is particularly valuable for slow-speed equipment where vibration signals are too weak for reliable analysis. Access to measurement points and background ultrasonic noise levels are the main factors that determine measurement quality.
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Know Your Exchanger Wall Condition
Our ultrasonic thickness surveys and weld inspections quantify corrosion, erosion, and remaining life in your shell and tube heat exchangers.
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