TinnerFlow™2nd YearYELLOW · Check FirstSpiral 45 Collar Separation
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.
Do not trust tape or mastic to hold a spiral elbow that is sliding off the collar.
A separated 45 elbow can dump air, fail pressure testing, and pull the run out of alignment.
Final direction belongs to the foreman, approved drawings/specs, manufacturer instructions, pressure/material schedule, employer policy, and AHJ/code requirements.