Static field route #19349

What do I do when a factory spiral seam whistles during pressure test?

Sealing, Leakage, Mastic & Pressure Testing⚠️ CHECK BEFORE YOU FIXField answer expansion

📖 Verified core answer

Do not hammer the spiral seam flat. Clean, seal, and wrap/repair it with the approved pressure-class method or replace defective pipe.

Open in Field Rescue Open category

Field verification checklist

Locate the exact whistling section during test.
Check for visible seam gap, denting, oil, or damage.
Clean before applying sealant.
Use approved high-pressure seal/wrap method.
Retest the repaired section.

Ask foreman

The spiral lockseam at [location] is whistling during pressure test. I located the seam leak and checked for damage. Do you want approved seam sealing or replacement of the section?

Text to foreman

Route options

ACorrect it only if the fix is within your assignment and approved method.

BHold and document if it affects pressure class, listed assembly, material spec, support load path, fire barrier, equipment, TAB, or another trade.

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

Do not do this

Do not smash a spiral seam with a hammer to “tighten” it.

Why this matters

Factory seam leaks can fail pressure testing and become hidden energy/noise problems after ceilings close.

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, pressure/material schedule, and AHJ/code requirements.

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