How to Cut Black Iron Pipe

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Black iron pipe is generally used in the home for gas lines. Most household gas pipes are 3/4-inch in diameter and are threaded at both ends. When cutting through a black iron pipe, chances are that the cuts will have to be threaded, so the cut must be as straight and clean as possible. A rotary pipe cutter is used to make the cut and though somewhat expensive, can prove cost-effective over time if used multiple times. Also check local rental stores for possible daily/hourly rental.

Things You'll Need

  • Pipe vise
  • Felt tip pen
  • Rotary cutter
  • Cutting oil and rag
  • Reamer
  • Rag
  • Tighten the pipe in a pipe vise, if it is not already secure. Mark the pipe where it needs to be cut.

  • Place the rotary cutter around the pipe and tighten the knurled handle so the cutter blade lowers onto the mark. Wipe some cutting oil onto the area where it will be cut.

  • Rotate the cutter 360 degrees twice. Tighten the knurled handle again, add some more cutting oil and rotate two more times. Repeat this process until the pipe is cut through. Push a reamer into both cut pipe ends and twist, to remove any metal burrs. Clean the pipe ends with a rag.

Tips & Warnings

  • Be careful reaming the pipe ends, as burrs will be sharp.

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References

  • Photo Credit rusty pipes image by Paul Smith from Fotolia.com
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