Thermography (Infrared Inspection) for steam traps
Thermography (Infrared Inspection) is one of the most effective ways to monitor steam traps: it catches developing faults — failed open — continuous live-steam loss, failed closed — condensate backup and water hammer, plugging and partial blockage — early, so repairs are planned rather than forced by a breakdown.
Why thermography (infrared inspection) suits steam traps
A typical plant has hundreds or thousands of steam traps, and a meaningful share fail every year. A trap failed open vents live steam continuously; a trap failed closed floods the line and risks water hammer. Because the loss is invisible on a control screen, periodic testing is the only way to catch it — and the fuel saving is immediate.
How thermography (infrared inspection) works
An infrared camera images the heat radiated from surfaces, turning temperature differences into a picture. Because most developing mechanical and electrical faults generate abnormal heat, a thermal survey finds them without shutting equipment down — a hot connection, an overheating bearing, a stripe of missing insulation. It is widely used both for condition monitoring and for energy audits, where it quickly shows where heat is escaping.
Faults it catches on steam traps
- Failed open — continuous live-steam loss
- Failed closed — condensate backup and water hammer
- Plugging and partial blockage
- Wear of internal mechanisms
What the data shows
A localised hot spot on an electrical connection flags a loose or corroded joint; a hot bearing housing flags developing bearing failure or poor lubrication; a cold steam trap flags one failed closed; a warm patch on a vessel flags missing or wet insulation.
Thermography (Infrared Inspection) on steam traps: implementation
Implementation on steam traps: Start by establishing a baseline — what thermography (infrared inspection) looks like on a healthy steam traps. This typically takes 2–4 weeks of normal operation. Once baseline is established, any divergence from the norm signals a developing fault. Most plants find that a threshold alert (warn if exceeding baseline +X%) is simpler to manage than complex signal-processing algorithms.
Fault progression: The faults caught by thermography (infrared inspection) on steam traps typically develop over days or weeks, not hours. This means you have a window to schedule repairs during planned downtime, avoid emergency callouts, and reduce parts inventory for emergency spares. That window is the value of the technique — it transforms random failures into managed maintenance.
Integration with maintenance: Condition monitoring data works best alongside a predictive or preventive maintenance schedule. Use thermography (infrared inspection) to trigger or validate the need for an intervention, rather than relying solely on calendar-based overhaul. This data-driven approach often reduces maintenance cost by 10–20% while improving reliability.
Related
Predictive maintenance for steam traps · Thermography (Infrared Inspection) overview · Thermography (Infrared Inspection)