Corrosion-Resistant Systems · Aluminum Ductwork
Install aluminum companion-angle joint
Aluminum flanged duct — Corrosive rectangular duct
Hardware guidanceUse approved aluminum or stainless hardware with isolation/washer arrangement.
Anti-seize / gallingAnti-seize changes friction; follow approved tightening method.
How to install it
- 1
Clean flange faces
- 2
install compatible gasket
- 3
align
- 4
insert approved bolts and washers
- 5
snug evenly
- 6
avoid over-tightening soft aluminum flange.
Quality check
- Flange does not dish or crack
- gasket compression is even.
Stop and verify
Stop if the flange begins to deform.