The Role of Heat Tracing and Insulation in High-Temperature Lines
The Role of Heat Tracing and Insulation in High-Temperature Lines
In high-temperature or freeze-sensitive applications, insulation alone is not enough. Heat tracing systems — paired with proper insulation — ensure fluid temperatures stay within critical ranges, especially during startups or cold spells.
1. What Is Heat Tracing?
Heat tracing involves installing electric cables or steam tubing along pipelines and equipment to provide supplemental heat.
Electric heat tracing (EHT): Self-regulating or constant-watt cables
Steam tracing: Stainless steel tubing with live steam
These are then insulated and jacketed to retain the generated heat.
2. Where Is It Used?
Sulfur and asphalt lines
LNG lines with boil-off gas
Chemical transfer lines
Firewater or instrument air pipes in cold zones
3. Best Practices
Use insulation with matching temperature rating (e.g., up to 600°C)
Avoid compressing heat trace cables
Include vapor barriers to prevent moisture ingress
Ensure inspection ports are integrated into the insulation system
