Industrial Flexible Duct

• Made with PVC coated fabric and reinforced with steel wire (φ2mm–φ4mm), covered by a rubber strip..
• Diameter: 150 mm to 800 mm (custom diameters available).
• Standard Length: 1 m to 20 m (custom lengths available).
• • End connection options include zipper, Velcro, steel ring, or eyelets.
• Flame retardant standards NFPA 701 and DIN 4102 B2 approved; B1 class is also available.
• Optional: anti-static value less than 300 MΩ..
• Ideal for use in factories, laboratories, basements, underground coal mining projects, tunnels, subways, and ships.

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Standard Technical Specifications

PVC Fabric		500g FR	550g FR	600g FR	650g FR	700g FR
Total Weight (gsm)		500±20	550±20	600±20	650±20	700±20
Color		Yellow / Black / Green / Customized
Tensile Strength (DIN53354)	Warp (N/5cm)	1000	1800	2600	2800	3000
	Weft (N/5cm)	1200	2400	3000	3400	3600
Tearing Strength (DIN53363)	Warp (N)	240	350	450	800	880
	Weft (N)	320	400	750	800	880
Working Temperature		-20℃ ~ +80℃
Flame Retardant		NFPA701:2015, DIN 4102 B2
Inside Diameter		200mm – 3200mm
Section Length		1m – 300m
Couplings		Zipper / Steel Ring / Velcro / Eyelets
Anti-static		≤300MΩ (if required)

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Customize YOUR Flexible Duct

Every parts of the ventilation ducting system matter. Sulong ventilation duct with multiple custom options fulfills your requirements in budget and quality.