Guarding the tropical zone and keeping away from high temperature damage

High temperature accumulation, improper adaptation to working conditions, and poor heat dissipation are the main causes of aging, insulation breakdown, and power attenuation of electric heat tracing sheaths. In severe cases, they can lead to safety hazards such as short circuits and fires. Proper high-temperature protection can effectively prevent equipment damage and extend the service life of electric heat tracing belts.

High temperature damage in electric heating belts is mainly divided into two categories: external high temperature and internal heat accumulation. External high temperature originates from pipeline media, equipment surfaces, and environmental high temperature radiation. Long term operation of cables beyond their rated temperature resistance will accelerate material aging and brittleness. Internal heat accumulation is often caused by improper construction and operation, which is a controllable human hazard and the most common cause of high-temperature damage on site. The combination of two types of problems will significantly shorten the service life of the heat tracing system and cause various safety failures.

Mismatch of operating conditions is the core cause of external high-temperature damage. The temperature resistance levels of different models of electric heat tracing belts vary greatly. Ordinary low temperature and medium temperature heat tracing belts have lower temperature resistance limits and cannot be adapted to scenarios such as high-temperature process pipelines, steam heat tracing peripherals, and high-temperature equipment outer walls. If low temperature resistant cables are blindly used instead of high-temperature specialized models, long-term exposure to high-temperature environments can lead to sheath cracking, core aging, insulation failure, causing leakage, short circuits, and even fires. The selection of operating conditions must strictly match the maximum temperature of the pipeline and reserve sufficient temperature tolerance margin.

Illegal installation is the main cause of internal heat damage. During the construction process, constant power and MI armored heat tracing belts are overlapped and stacked, which can cause local heat to be unable to dissipate and the temperature to accumulate and exceed the standard. Even if the self limiting temperature electric heat tracing belt is stacked and compacted in a large area, it will still break the adaptive temperature control balance and cause local overheating and heat accumulation. At the same time, the cable is completely enclosed by the insulation layer, with no heat dissipation space. Long term operation can accumulate heat, which will continue to burn the cable structure and cause irreversible high-temperature damage.

Improper operation control can exacerbate high temperature losses. Long term uninterrupted power supply without a temperature controller, excessive circuit load, and delayed disposal of abnormal heating in the circuit will keep the heat tracing belt in a high load and high temperature operating state. Especially in the high temperature environment of summer, the base temperature of the environment is high, combined with its own heating temperature, the overall temperature far exceeds the normal operating range of the equipment, accelerating the powdering of the sheath and core fatigue, leading to premature aging and scrapping of the equipment.

Standardize the entire process of protection and eliminate the hidden dangers of high temperature damage. Strictly distinguish the temperature resistance level during the selection stage, and use high-temperature heat tracing belts specifically for high-temperature process conditions to prevent the mixing of low specification cables. During the construction phase, strict standardization of laying is required, with all cables laid flat and stretched, and overlapping stacking is prohibited to ensure smooth heat dissipation. The insulation layer should be laid with moderate tightness, without compaction or sealing to lock the temperature.

Implement temperature control and inspection management during the operation and maintenance phase. Equipped with intelligent temperature control equipment, it can start and stop accurately according to working conditions to avoid long-term idling and overheating. During the summer when the machine is idle due to high temperatures, it is important to take measures such as sun protection and insulation to avoid prolonged exposure to heat and aging. Regularly inspect the appearance and insulation resistance of cables, promptly replace damaged cables with high-temperature burn marks, discoloration, and hardening, and prevent operation with defects.

In summary, the high temperature damage caused by electric heat tracing mostly stems from improper selection and non-standard construction and operation. Accurately adapting to working conditions, standardizing installation and heat dissipation, and scientifically controlling operation can effectively avoid high-temperature heat accumulation damage, ensuring the safe, stable, and long-term operation of the heat tracing system.