Durable HDG Unistrut Channel for Pipeline & HVAC Support Introduction Durable HDG unistrut channel is a professional support steel specially used for HVAC air duct suspension, water pipeline fixing, fire pipeline support and mechanical pipeline laying projects. Adopting high-quality carbon steel substrate and overall hot-dip galvanizing process, the product has super strong durability and anti-corrosion performance, which can adapt to humid indoor environments, ventilation