Pipe bomb
(重定向自Pipebomb)


![This 1886 engraving was the most widely reproduced image of the Haymarket riots. It inaccurately shows Fielden speaking, the pipe bomb exploding, and the rioting beginning simultaneously.[5]](/uploads/202502/02/HaymarketRiot-Harpers4315.jpg)
A pipe bomb is an improvised explosive device, which uses a tightly sealed section of pipe filled with an explosive material. The containment provided by the pipe means that simple low explosives can be used to produce a relatively large explosion, and the fragmentation of the pipe itself creates potentially lethal shrapnel.