Ultrasonic Testing for Plate Heat Exchangers
Specialized Ultrasonic Testing programs for Plate Heat Exchanger Reliability & Maintenance.
Why it matters
Key Benefits
Leak Detection
Airborne ultrasonic detection identifies pressure and vacuum leaks in plate 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 plate 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 plate heat exchangers detect high-frequency stress waves generated by metal-to-metal contact, friction, and impacts in the plate pack, gaskets, frame plates, tightening bolts, and port connections. These signals appear weeks before vibration amplitude increases detectably.
Context
Challenge & Approach
The Reliability Challenge
Plate heat exchanger frame end plates and carrying bars experience external corrosion from the operating environment and internal corrosion from process fluids. Nozzle connection areas are stress concentration points where corrosion accelerates. Frame bolt holes may develop corrosion that reduces clamping capability. Connection piping thickness measurements must account for geometry effects at bends, tees, and reducers. Individual plates are too thin for conventional UT thickness measurement and are typically inspected by dye penetrant or eddy current methods during disassembly. Frame surface access may be limited by insulation, cladding, or closely adjacent equipment. Surface preparation requirements for accurate UT coupling can be challenging on corroded surfaces.
Our Approach
We perform ultrasonic thickness measurements on frame end plates, nozzle bodies, connection flanges, and associated piping using calibrated thickness gauges with appropriate transducers for the material and thickness range. Thickness readings are taken on a grid pattern at nozzle connections and at minimum wall locations identified from previous inspections or corrosion risk assessment. Frame carrying bar and guide bar sections are measured at wear-prone locations. Connection piping is surveyed with attention to flow-accelerated corrosion locations (bends, restrictions). Bolt hole areas are examined where accessible. All measurements are compared against nominal design thickness and minimum required thickness per ASME calculations. Reports include thickness data sheets, minimum wall readings, corrosion rate calculations where previous data exists, 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 plate 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 plate 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 plate heat exchangers.
Ultrasonic testing is effective on rotating and reciprocating components, pressure boundaries, and electrical systems associated with plate 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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Request a Free Reliability Assessment
Tell us about your equipment and facility. Our reliability team will review your situation and recommend a tailored reliability program — no obligation.
Verify Plate Exchanger Structural Integrity
Our ultrasonic thickness surveys confirm frame, nozzle, and piping wall condition on your plate heat exchangers to ensure safe, continued operation.
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