The core difference between GI (Galvanized Iron / Steel) outer-protected insulation pipes and HDPE (High-Density Polyethylene) outer-protected insulation pipes lies in the material of the outer protection, applicable scenarios, and construction methods. GI is more suitable for overhead/exposed installation, while HDPE is more suitable for direct burial.
- GI jacket is preferred for above-ground / exposed systems where sunlight resistance and rigidity are needed.
- HDPE jacket is ideal for underground direct burial due to superior corrosion resistance, waterproofing and long-term durability.
Tags: GI jacketed insulated pipe, HDPE jacketed insulated pipe, Corrosion resistant insulated pipe for underground,
