How do I avoid the single-blade crimp slip-out

Plain-English answer

You use a 5-blade hand pipe crimper to prep the raw edge of a field-cut round pipe. You hold the tool at a 45^° angle to the barrel skin. The crimps turn out shallow and angled, and when you slip the pipe into an elbow, the joint pops apart under low static pressure testing.

Pipe crimpers must be held completely perpendicular (90^°) to the pipe axis to form stable mechanical corrugated ridges. Drive the blades a full 11/2 inches deep into the metal rim. Overlap your previous corrugated indentation by at least two blade slots. The likely recovery is to check the tool setup, correct the prep or technique if it is within your assignment, and bring the journeyman or foreman clean information before the work creates rework overhead.

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Use this as training guidance. Foreman direction, approved drawings, project specs, manufacturer instructions, employer safety policy, and AHJ/code requirements always control the final answer.

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