Apprentice question
Verify first
Verify before you commit. Cheap to catch now.
Angled round fittings can see thrust and vibration. Re-seat the joint, confirm overlap, fasten mechanically per approved standard, and seal after the connection is solid.
['A 45° elbow changes airflow direction, so a weak slip joint can walk apart under velocity, fan pulsing, or vibration. Sealant cannot hold a joint that does not have enough mechanical engagement.', 'Pull it back, check collar depth, seat the pipe fully, add proper mechanical fasteners per the pressure class/shop standard, and seal the seam only after the joint is locked. If collar engagement is too short, replace the fitting or use an approved coupling.']