What is a unique method for removing a pipe that will not unscrew from a cast iron fitting?

Prepare for the New Mexico State License Pipe Fitter Exam. Study with flashcards and multiple-choice questions, each question offers hints and explanations for better understanding. Get ready to excel in your exam!

Using a hammer to hit the fitting can create vibrations that may help to loosen a stuck pipe from a cast iron fitting. The impact from the hammer can break the bond formed by rust or corrosion, making it easier to unscrew the pipe. This method can be particularly effective in situations where traditional methods fail and is commonly used in pipe fitting to ensure the joint can be separated without damaging the pipe or fitting.

Applying heat to the joint may also be a method employed in certain situations, as thermal expansion can help to break the bond, but it comes with risks, particularly with materials that could be affected by high temperatures. Increasing torque with a wrench often leads to the risk of damaging the pipe or fitting, especially if they are old or corroded. Lubricating the threads can help in some cases, but if the fitting is severely rusted, it may not be enough to facilitate the removal without additional force.

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