Patent ID: 8549929

Claim:
A compact pipe specimen applicable to a fracture toughness test of a pipe material, the compact pipe specimen comprising: a pipe which is cylindrical and has a hollow portion, the pipe having a notch portion formed in a circumferential direction and a crack portion formed at the edge of the notch portion; and first and second jigs having openings to which a pressurizing unit is coupled so as to cause a bending load on the pipe, having the notch portion therebetween, and attached to the exterior surface of the pipe, respectively, wherein projections are formed toward the pipe on the first and second jigs that are attached to the pipe, respectively, wherein holes are formed in the pipe, pass through the pipe in a radial direction of the pipe, and have sizes corresponding to the cross-sections of the projections, and wherein the projections are coupled to the holes so that the first and second jigs are attached to the exterior surface of the pipe, respectively.