LOTO — Thermal and Chemical Energy
Construction and general industry · Ver en español
Talking points
- Thermal energy in steam lines, hot water systems, heated molds, and process piping can cause severe burns even after the heat source is isolated. Allow time for cool-down or drain the system.
- Chemical reactions can continue after a system is shut down — exothermic reactions in tanks, curing processes, or mixing operations may generate heat or pressure for hours.
- Verify temperatures with a contact thermometer or infrared gun before touching surfaces or opening systems. 'It should be cool by now' is not a verification method.
- Steam systems require special caution — steam at even low pressure carries enormous energy. Close supply valves, drain condensate, and vent the system before opening any component.
- Chemical energy also includes residual hazardous substances in lines and vessels. Flush, drain, and purge systems per the chemical-specific procedure before opening.
Ask the crew
Are there any hot or chemically active systems we need to cool or purge before today's maintenance work?
Standards this talk is built on
A toolbox talk is a short safety briefing. It supports the training a standard requires; it does not replace it.
Run this talk with your crew and keep the record
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Sign-in sheet
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| Name | Signature | Date |
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