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
What the signal looks like. 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.
How that reads on steam traps specifically. Continuous flow audible on ultrasound with a hot downstream side indicates a trap failed open; a cold trap indicates failed closed or plugged. Tagging each trap and tracking it over surveys turns a one-off audit into a managed, recurring saving.
Where it is blind. Thermography (Infrared Inspection) does not cover every failure mode on steam traps. The equipment profile also lists Ultrasound testing of trap operation, Temperature measurement (inlet vs outlet), Acoustic/IoT trap monitors on critical traps — they exist because they detect modes this technique cannot see.
Before you set a threshold. Baselining, alarm criteria and the route from alert to work order are the same problem for every technique. They are covered once in setting up a condition monitoring programme and in the thermography (infrared inspection) overview.
Thermography (Infrared Inspection) on other equipment
Thermography (Infrared Inspection) for electric motors · Thermography (Infrared Inspection) for bearings · Thermography (Infrared Inspection) for heat exchangers · Thermography (Infrared Inspection) for conveyors
Other techniques on steam traps
Ultrasound Testing for steam traps
Related
Predictive maintenance for steam traps · Thermography (Infrared Inspection) overview · Thermography (Infrared Inspection)