Elbows & Offsets ยท Elbows & Offsets
Round long-radius elbow
Low-loss turn
ConnectionGasket/slip/flange
SupportDedicated elbow support
Before you start
- Confirm the long-radius elbow size, radius, joint type, airflow direction, and dedicated support.
- Field-check the full swing of the heel against structure and access zones.
- Inspect the elbow body, tangents, ends, gasket, and seams for damage.
- Verify the fitting can be installed without flattening or shortening the radius.
Tools and materials
Round long-radius elbow, approved gasketed, slip, or flanged joint components, fasteners, sealant, soft slings, dedicated fitting support, level, laser, and hand tools.
Lay it out
- Mark inlet and outlet tangents and the elbow plane.
- Confirm the long radius clears all structure.
- Locate support near the fitting center of gravity.
Set and support it
- Support the elbow body independently.
- Use soft slings and more than one control point where needed.
- Keep both straight runs supported.
Make the connection
- 1
Set the elbow on its support and align the inlet tangent.
- 2
Complete the first joint fully.
- 3
Recheck fitting rotation and downstream centerline.
- 4
Bring the downstream run to the outlet tangent.
- 5
Complete the second joint.
- 6
Install approved fasteners and seal.
- 7
Load supports and verify the fitting does not roll.
Check the install
- Both tangents align smoothly with the straight runs.
- The elbow retains its full round profile and radius.
- Both joints are fully inserted or seated.
- The fitting does not roll.
- The support carries the elbow body.
Common mistakes
- Trying to squeeze the elbow past structure.
- Rolling the fitting to reach the downstream run.
- Supporting only one end.
- Treating a long-radius elbow like a flexible offset.
Stop and ask
Stop if the radius conflicts with structure and cannot be installed without deformation, or if the fitting size or radius differs from the approved design.