Flanged Double Branch 18ga

Nordfab 18 Gauge Double Branches are standard 30º between legs, optional 45º.

18 gauge galvanized steel material provides extra durability for high wear applications

Flanged Double Branches are standard with industry-standard Angle Flanges on both ends, the flanges are retained via a vanstone lip so that bolt holes can easily be aligned with those on existing flanged connections.

When ordering, specify A, B, C, and D. Note: (A – C) ≥ (C-B) and (C) ≥ (D)
Use the following formula to determine length: L = C X 2 + 15”
Available with QF ends in diameters up to 24", flanged diameters up to 72", and other end types
Other material gauges available include standard 22 and 20, 16, 14, 12 and 10
Flange gaskets available

Contact Nordfab or your local Nordfab dealer for assistance with optional end types, larger sizes, and material / gauge options.

Specification

A. General Fabrication Requirements: Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Ch. 3, "Round, Oval, and Flexible Duct," based on indicated static-pressure class unless otherwise indicated.
1. Construct ducts of galvanized sheet steel unless otherwise indicated. 304SS Optional.
2. Basis-of-Design Product: Subject to compliance with requirements, provide Nordfab Ducting, LLC; Quick Fit (QF) Duct.
B. Connection Joints: Joint types are fabricated in accordance with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," for static-pressure class, applicable sealing requirements, materials involved, duct-support intervals, and other provisions in SMACNA's "HVAC Duct Construction Standards - Metal and Flexible."
1. Quick Fit Joints in Ducts 3 to 24 inches (76 to 510 mm) in diameter. Flange: Optional.
2. Flanged Joints in All Ducts Greater than 24 inches (610 mm) in diameter.
C. Longitudinal Seams: Seam types are fabricated in accordance with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Figure 3-2, "Round Duct Longitudinal Seams," for static-pressure class, applicable sealing requirements, materials involved, duct-support intervals, and other provisions in SMACNA's "HVAC Duct Construction Standards - Metal and Flexible."
1. Fabricated round ducts 3 to 24 inches (76 to 510 mm) in diameter to have laser-welded or plasma-welded longitudinal seams.
2. Fabricated round ducts above 24 inches (610 mm) in diameter to have plasma-welded longitudinal seams.