Series Constant‑Power Heating Cables Expand Long‑Distance Pipeline Thermal Maintenance Capabilities for Global Industrial Projects

Engineered for industrial long‑haul pipeline thermal management scenarios, HGC‑□‑□/J□ series constant‑power heating cables adopt resistive core conductor Joule‑heating principles to maintain consistent power output along the full cable length. Unlike parallel‑resistance heating solutions with strict circuit‑length limitations, this cable series enables single‑feed circuit deployment reaching 3600 meters, making it well‑suited for cross‑site process pipelines requiring continuous temperature preservation and freeze protection.

The cable integrates multi‑layer construction including heating conductor, heating‑element insulation, inner protective jacket, metallic braided shielding layer and outer insulating jacket. An optional fluoroplastic over‑sleeve can be fitted over the braided shield to add extra mechanical and chemical corrosion resistance for underground burial or chemical‑exposed service environments.

Broad‑range voltage ratings cover 220V, 380V, 660V, 1100V, 3300V and 6600V. Key thermal performance metrics include maximum maintained temperature of 100℃, maximum withstand temperature of 205℃, and minimum installation temperature down to ‑50℃. Certified for use within Zone 1, Zone 2 hazardous explosive atmospheres as well as non‑hazardous general industrial environments.

Special cold‑end connection technology is adopted for power‑source terminals to extend overall service life. Installation procedures involve crimping heating core conductors with cold‑end wires via copper lugs, wrapping with 3M tapes while reserving braided shielding for grounding purposes, then applying four‑layer heat‑shrink sleeves and thermal tightening to secure connection joints. This connection methodology enhances joint sealing, mechanical robustness and anti‑failure performance for field industrial installation.