PVC Coated Fabric Underground Flexible Ventilation Air Duct for Mining Tunnel Construction

PVC Coated Fabric Underground Flexible Ventilation Air Duct for Mining Tunnel Construction. Wide Diameter Range: Available in diameters from 200mm to 3200mm to suit various ventilation needs. Customizable Dimensions: Length can be customized from 10m to 300m per piece upon request. Flame Retardant Certified: Meets EU and US standards including EN 13501-1, NFPA 701, and GB 8624. Anti-Static Options: Material options available to prevent static buildup in sensitive environments. High Tensile Strength: Features high strength in both warp and weft directions for durability. Eco-Friendly Material: Made of PVC composite polyester fiber, non-toxic, odorless, and environmentally friendly. Low Air Leakage: Hot-air welding process ensures excellent airflow performance and minimal leakage. Versatile Connection Methods: Supports zipper, steel ring, or Velcro connections for flexible installation.