🌀Engineering Ventilation Duct φ1200 Product Overview

The φ1200 Positive Pressure Ventilation Duct is a custom-designed industrial air supply hose for ultra-large ventilation systems. It is ideal for long tunnels, main mine airways, and large cross-section underground ventilation projects. With a diameter of 1200mm and standard section length of 10 meters, this duct is made from heavy-duty knife-coated fabric, offering excellent structural strength, airflow efficiency, and extended service life.

The duct features versatile and secure joint types, compatible with high-power positive pressure axial fans, perfectly suited for projects requiring high airflow volume and stable pressure.

✅Engineering Ventilation Duct φ1200 Key Features

φ1200mm Extra Large Diameter: Meets maximum airflow delivery demands, expanding air coverage area
High-Density Knife-Coated Fabric: Tear-resistant and crush-proof, suitable for harsh construction environments
Flame Retardant & Anti-Static Composite: Complies with underground mining safety standards
Multiple Connection Methods: Supports steel rings, flanges, zippers, and buckle straps for tight, fast assembly
Customizable Project Markings: Numbering, reflective labels, color coding available
Manufactured Strictly to Chinese Standards: Perfect for domestic use and export projects

📐Engineering Ventilation Duct φ1200 Technical Specifications

Parameter	Specification
Product Model	φ1200 Positive Pressure Ventilation Duct
Nominal Diameter	1200 mm
Material	Double-sided PVC coated knife fabric (High-strength polyester base fabric)
Thickness Range	0.7 mm – 1.0 mm (customizable thickness available)
Standard Section Length	10 meters (custom lengths like 5m, 8m available)
Wind Pressure Resistance	≥ 18 kPa
Flame Retardant Rating	Class B1 (according to GB 8624-2012)
Anti-Static Performance	Surface resistance ≤ 3×10⁸ Ω (Coal Safety Standard)
Operating Temperature	-25℃ to +85℃
Standard Connection Types	Zipper / Flange / Buckle Strap / Steel Ring
Standard Accessories	Tape, reflective strips, hanging straps, reinforced edging
Service Life	1 to 2 years under normal conditions

📜Engineering Ventilation Duct φ1200 Applicable Standards (Chinese Only)

GB/T 20043-2015 “Coated Fabric Ventilation Hose for Mining”
MT/T 391-2012 “Technical Conditions for Coal Mine Ventilation Hose”
GB 8624-2012 “Classification for Combustion Performance of Building Materials”
GB 3836.1-2021 “General Requirements for Equipment in Explosive Atmospheres”

📎Engineering Ventilation Duct φ1200 Available Documentation

Material Test Reports (Flame retardant / Anti-static)
Product Qualification Certificates and Factory Inspection Reports
MA Mining Safety Certification (for coal mine projects)

🏗️Engineering Ventilation Duct φ1200 Application Scenarios

Urban subway, high-speed rail, and highway tunnel large ventilation systems
Main mine airways or deep mine air supply systems
Underground utility corridors and urban ventilation tunnels
Temporary or permanent ventilation for large industrial plants
Disaster prevention, emergency ventilation, and large-scale dust removal systems

🧩Engineering Ventilation Duct φ1200 Customization Options

Item	Available Options
Printing Information	LOGO, project number, QR code, reflective warning strips
Material Enhancements	Increased thickness, mildew resistant, UV protection, oil-proof coating
Structural Improvements	Internal reinforcement ribs, double seam stitching, external positioning rings
Packaging & Shipping	Bagged / Rolled / Wooden pallet packaging with Chinese/English labels