EPI HGC‑1 / HGC‑3 Series‑Connected Constant‑Power Heating Cables Solve Ultra‑Long Pipeline Heat‑Tracing Pain Points for Global Heavy‑Industry Projects

Global oil‑gas transmission, chemical processing and cross‑regional industrial infrastructure projects face prominent technical bottlenecks for freeze‑protection and temperature retention on extra‑long pipelines. Conventional parallel‑type heat‑tracing cables are constrained by limited single‑loop service length and suffer obvious power attenuation at remote pipe sections. EPI’s HGC‑1 and HGC‑3 series‑connected constant‑power heating cables break such application limits, delivering stable Joule heating along the whole cable length for long‑distance process pipeline thermal management.

The HGC‑□‑□/J□ series heating cable adopts multi‑layer composite construction, consisting of heating conductor, heating‑element insulating layer, inner sheath, metallic braided shielding layer and outer insulating jacket. An optional fluoroplastic sleeve over the metal braid can be configured for underground‑buried pipelines or sites exposed to corrosive chemicals, offering enhanced anti‑corrosion protection for the shielding braid and extending overall service life in harsh working conditions.

This series supports multiple wide‑range rated voltage specifications covering 220V, 380V, 660V, 1100V, 3300V and 6600V to match diverse global industrial power supply standards. The cable achieves maximum maintained temperature up to 100℃ and maximum withstand temperature reaching 205℃, while the minimum installation temperature drops to ‑50℃, adapting to extremely cold outdoor construction environments. With single‑point power supply, the maximum available circuit length can reach 3600 meters, greatly cutting the quantity of power supply junctions for long‑haul pipeline projects. Meanwhile, the product is qualified for ordinary working sites as well as hazardous explosive locations of Zone I, Zone II and Zone 2, meeting strict safety requirements of petrochemical and energy‑related facilities.

Special cold‑end connection technology is adopted for power terminal processing to optimize the service life of series‑connected heating cables. Field installation requires stripping outer and inner jackets as well as insulation layers to expose heating core conductors, crimping core conductors with cold‑end wires via copper connectors, wrapping joints with 3M tapes while reserving metal braid for earthing purpose, then applying multi‑layer heat‑shrink sleeves for sealed insulation protection. Standardized cold‑end assembling procedures effectively prevent joint failure risks triggered by long‑time high‑current operation.

For global EPC contractors and plant operators, EPI HGC‑1 and HGC‑3 series fill the market gap of high‑voltage, ultra‑long‑loop constant‑power heat‑tracing solutions. It is widely deployed for freeze‑protection and medium‑temperature maintenance of cross‑country oil‑gas pipelines, chemical raw‑material delivery pipelines, mine process piping and remote industrial station piping. Different from parallel constant‑wattage products, series‑connected structure guarantees consistent watt‑per‑meter heat output throughout the entire loop without thermal decay on far‑end segments. EPI also supplies supporting engineering guidance for cable selection, cold‑end fabrication and earthing configuration, helping international customers complete reliable heat‑tracing system deployment for large‑scale industrial facilities.