A porous body belt includes a body to be connected including a porous body, a connecting material A that is disposed on the body to be connected by spanning a gap between end portions of the body to be connected and contains a fiber A and a resin material A, and the resin material A penetrates at least a part of a void portion of the porous body of the body to be connected, and bonds the end portions of the body to be connected to each other.

A fusion bead testing device is provided for testing the strength of a fusion bead removed from a pipe joint. The testing device comprises a first pressing means for exerting a force against the fusion bead. If the fusion bead splits as a result of the applied force then the fusion bead fails a quality control test and the fusion bead and consequently the pipe joint from which the bead was removed are deemed too weak. The fusion bead testing apparatus comprises an automatic split detection device for detecting a split in the bead.