Static field route #19110

What do I do when acoustic liner pins stick into the duct airstream?

Insulation, Liner, Vapor Barrier & Condensation✅ STANDARD FIELD CORRECTIONV191 answer-gap expansion

📖 Verified core answer

Loose or proud liner pins can catch dirt and let liner lift in the airstream. Flatten/secure them and repair liner facing per approved liner adhesive/spec before inspection closeout.

Open in Field Rescue Open category

Field verification checklist

Inspect liner pins with light/mirror before closing the run.
Check for proud pins, loose liner, torn facing, or exposed fibers.
Secure or flatten pins using approved method/tools.
Brush/coat damaged spots with approved liner adhesive/sealer.
Remove debris before final closeout.

Ask foreman

The lined duct at [location] has pin heads/liner fasteners sticking into the airstream. I checked for loose liner. Do you want them flattened and sealed with approved liner adhesive before inspection?

Text to foreman

Route options

AMake the field correction only if it is within your assignment and the approved method.

BHold and document the condition if the fix affects airflow, access, life safety, pressure class, rated assemblies, equipment, or another trade.

CBring the foreman/detailer the location, what you checked, and what decision you need before cover, startup, or rework.

Do not do this

Do not leave sharp or proud liner pins sticking into the airstream because “nobody will see it.”

Why this matters

Loose liner hardware can collect debris, damage liner, shed fibers, and fail QA/QC inspection.

Final verification

Use this as field training guidance. Final direction still comes from the foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements.

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