Static field route #19652

What do I do when a round pipe crimp is too shallow and slips apart?

Spiral, Round & Oval Duct Install✅ FIELD REFERENCEField answer expansion

📖 Verified core answer

Round slip joints need an even crimp around the full pipe end. Shallow random dents will not give the fitting a solid mechanical bite.

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Field verification checklist

Use the proper crimper for round pipe.
Keep crimps even around the full circumference.
Test fit before sending the piece up.
Look for loose, wobbly, or ovalized ends.
Fasten and seal after the overlap seats fully.

Ask foreman

Those shallow dents won't hold under system pressure. Use the 5-blade crimpers to make deep, uniform folds an inch and a half deep around the rim so the pipe slides home snug into the fitting.

Text to foreman

Route options

A Correct prep/setup only if the fix is within your assignment and the approved method is clear.

B Hold and document if it affects safety, structural support, rated assemblies, airflow, access, tools, material condition, or another trade.

C Bring the journeyman/foreman the location, what you checked, and what decision you need before the crew loses time.

Do not do this

Do not use a few shallow dents and expect the joint to hold under vibration.

Why this matters

Uniform crimps help the joint slide home, stay round, and hold pressure.

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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