Welded a "weld O let" to a piece of pipe and had to chase out the threads for a 2" nipple. What a work out, got the tap seated to the bottom threads with a 12" wrench no problem. I start the cut, dead in the water. Add tapping fluid and a 14" wrench get 1/2 turn, back cuttings out and try again, no dice. Get the 24" wrench and get super secret tap stick, add 225 pounds of fat guy (me) and get 3/4 turn. Now I am not happy all I want to do is chase out said threads(the weld o let was oval). I put a 6' pipe on my 24" Armstrong adjustable and have at it. This thing is smoking from the torque I am inflicting as my helper laughs holding the wrench. Once again 1/2 turn and back cuttings out. To make a long story short we got the job done, did not shatter the tap, and are damn glad we did this project in the shop. Cutting threads on a 300 are one thing tapping 2" SS is another.
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2" Pipe Tap In Stainless