Electric heat tracing safety in high-risk industrial areas

In industrial settings, corrosive and explosive zones are vulnerable to damage. Heat tracing systems lacking corrosion resistance and explosion-proof capabilities can easily become "time bombs." Equipment in corrosive zones is damaged by the corrosive medium, while sparks in explosive zones can cause accidents. Specialized electric heat tracing cables, with their corrosion resistance and explosion-proof properties, are well-suited for these high-risk areas, ensuring production safety.

For heat tracing in corrosive zones, corrosion resistance is paramount. In chemical workshops, acid and alkali pipelines, and in electroplating plants, corrosive liquid transport equipment are constantly exposed to strong acids and alkalis. Ordinary heat tracing sheaths corrode and crack within 1-2 months, exposing the core wires and causing short circuits. Specialized corrosion-resistant electric heat tracing uses fluoroplastic or 316L stainless steel sheaths, meeting the GB/T 10125 standard for acid and alkali resistance, and can withstand over 90% of industrial corrosive media. One chemical plant's pickling pipelines, using ordinary heat tracing, experienced a short circuit due to corrosion after 3 months, resulting in a production shutdown. After switching to fluoroplastic sheathed heat tracing, there was no corrosion damage for two consecutive years, the pipeline temperature remained stable, and production was no longer affected by heat tracing failures.

For heat tracing in explosive areas, explosion-proof performance is crucial. Oil fields, coal mines, and other areas contain oil, gas, and dust. Ordinary heat tracing systems, if the joints are loose or the insulation is damaged, can easily generate electric sparks that could ignite flammable and explosive media. Dedicated explosion-proof electric heat tracing systems are Ex dⅡC T4 explosion-proof certified. The joints use explosion-proof junction boxes, and the wire insulation is resistant to oil and gas penetration, preventing sparks from contacting the outside environment. An oilfield pumping station previously used ordinary heat tracing systems, which triggered explosion-proof alarms due to sparks at the joints. After switching to explosion-proof heat tracing systems, there have been zero safety hazards for five years, meeting safety regulations for explosive areas and ensuring safer production.

Besides core characteristics, heat tracing systems suitable for high-risk areas require detailed design. For heat tracing in corrosive areas, the joint sealant must be corrosion-resistant to prevent media from seeping in through the joints. For electric heat tracing in explosive areas, the temperature controller must be explosion-proof to prevent risks from its own malfunction. A plating plant neglected joint sealing, resulting in water ingress and short circuits in its corrosion-resistant heat tracing system. After switching to corrosion-resistant sealant, the problem was completely resolved. Meanwhile, the heat tracing surface must be smooth and seamless to avoid the accumulation of corrosive media residues and reduce the risk of corrosion.