If you would like a flagpole in your yard, it is possible to assemble a simple version of one out of pipes. The flagpole can be as tall as you'd like as long as it won't be too difficult to place the flag onto it. The most important factor, however, is the flag stand; you need something to ensure the pole stays upright without falling down. Consider a couple of possible options.
Assemble a pole out of pipes, either steel or PVC. The pipes should be about two inches thick, and the number of pipes depends on how tall you want the flagpole. For PVC pipes, fit them together with PVC couples. For steel pipes, use threaded pipes that connect together.
Cap the flagpole at the top end. Use end caps for the particular type of pipe you are using. You can install a ball or other flagpole cap provided it will fit on your size pipe.
Insert the pole's bottom end into a steel pipe flange made to fit a 2-inch pipe. The flange itself should be at least 8 inches in diameter. It needs to be heavy enough to provide balance for the pole, keeping it upright. Another method is to insert the pole into a bucket filled with concrete.
Tie the flag to the pole using sturdy twine or string. To help the flag fly more freely, tie the string to the flag first, tying one string each in a knot through each of the flag's holes, then tying the string to the pole. This may require a ladder depending on how tall your pole is.
If you are making the flagpole stand out of a bucket and concrete, wrap the pole's bottom end in cling film covered in petroleum jelly before inserting it in the concrete. This will allow you to remove the pole after the concrete sets.