A pipe bomb is not a bomb. It is just a device to hold high boiling or high-pressure reactions in an enclosed cell. The bomb should be made from a stainless steel pipe that has as big of an inner diameter as possible (width, bubba!). There are two good configurations which can be seen in figure 5. One end is permanently sealed by welding. The other end, no matter which configuration is used, should have as much and as fine a threading as possible. Also, when sealing up the pipe bomb, it is a great idea to wrap a lot of teflon tape around the threads then screw on the cap. This will form an absolutely air tight seal. It is also possible to substitute a stainless steel pressure cooker for some sealed, pressured reactions.
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