22Q3112 Attachment 2 - Spec Insulated Duct.pdf

Insulated Flex Ducting Specifications – Attachment 2

1. SCOPE

1.1. PNSY is seeking to purchase insulated ductwork to support temporary HVAC systems. The Insulated ductwork will be installed in an industrial outdoor environment and must be able to withstand the harsh weather elements. The duct size must be 20 IN nominal inside diameter and in standard lengths of 25 FT long sections.

2. REFERENCES

2.1. Issues of Publications - The following documents of the issue date in effect on the date of request for proposal form a part of this specification to the extent applicable, or as specified herein. Within the specification, they shall be referred to by their basic designation only.

2.1.1. Government

2.1.1.1. N/A

2.1.2. Nongovernment

2.1.2.1. Fire Standard: UL94

3. REQUIREMENTS

3.1. Insulated Flexible Ventilation Duct

3.1.1. Flexible insulated ducting, 20 IN diameter @ 25 FT long per section.

3.1.2. Insulating R-Value: Minimum of R-4

3.1.3. Construction: Two pairs of single-ply PVC vinyl coated polyester fabric protecting an insulation barrier reinforced with a spring steel wire helix & external PVC wearstrip. Insulation composed of 1” Fiberglass in the core layer.

3.1.3.1. Each Individual single-ply PVC coated polyester fabric must be constructed with a minimum fabric weight of 8.5 oz.

3.1.3.2. Interior and exterior layers must meet fire resistance performance rating of V-0 as defined by the reference in 2.1.2.1

3.1.3.3. Constructed with sewn cuff containing integral wire rope locking rings to enable multiple duct sections to be connected in series without requiring additional couplers or fittings

3.1.4. Exterior and interior fabric color must be white.

3.1.5. Flex duct rated for positive pressure supply air applications with standard hard drawn wire helix reinforcement with an expanded pitch no greater than 6 inches

3.1.6. Duct working pressure (Positive): 24.9 IN/W.G.

3.1.7. Duct working pressure (Negative): -5.4 IN/W.G

3.1.8. The ducting must feature excellent UV stabilization; mold and mildew inhibitors; and be constructed for rigorous and continuous outdoor exposure in such a harsh environment.

3.1.9. Application temperature range: -20°F / +180°F

3.1.10. The fully-flexible (1-foot bend radius or less) and fully-compressible (5:1 ratio or better) ducting shall be transported to the site and staged/stored at the site in pallet-sized wire baskets.

3.1.11. The purchased duct must be new and not used or returned from a previous lease.

3.1.12. Ducting constructed with material colors of yellow or magenta is strictly prohibited.