Do not keep tightening a blast gate clamp until the pipe becomes oval.
Check
Check if the gate slide moves freely with clamps loose.
Inspect whether the pipe is ovalized at the housing.
Confirm industrial/dust collector support detail.
Add approved internal sleeve or reinforcing collar.
Retest gate movement before sealing/covering.
Steps
Check if the gate slide moves freely with clamps loose.
Inspect whether the pipe is ovalized at the housing.
Confirm industrial/dust collector support detail.
Add approved internal sleeve or reinforcing collar.
Retest gate movement before sealing/covering.
Say this to your foreman
The blast gate at [location] is binding because the housing is distorting the spiral pipe. I loosened/checked the clamp area. Do you want an internal sleeve or heavier connection collar added?