Abstract: The invention relates to a method for determining the size of a fracture (26) in a workpiece (20), in particular the depth of a fracture (26) in said workpiece (20), by means of the ultrasound pulse method, comprising the following method steps: a workpiece (20), with a front surface (22) and a back surface (24), having a fracture (26), extending from the back surface (24) and an angle test head (28) is applied to the front face (22), transmits ultrasound pulses at an angle alpha into the workpiece (20) and receives echoes from said pulse, the angle test head (28) is moved at least once over the fracture (26), such that the radiation beam (46) from the angle test head (28) completely covers the fracture (26), the received echo signals are digitized and stored in a memory (40) as variable pairs of echo signal versus runtime, the variable pairs form a value upwardly defined by an envelope (48) and the dimension of the fracture (26) is determined from the width of the envelope (48) at a given partial amplitude a

Abstract: The invention relates to a testing device for ultrasonic bar (30) testing, comprising a container (20) a) with a chamber disposed therein where the ultrasonic testing is carried out which b) is provided with at least one through-passage (28) for bars which are to be tested and which c) has at least one inlet and at least one outlet for a coupling fluid (52), especially water, whereby the inlet and outlet are arranged in such a way the coupling fluid (52) is circulated around the bar (30) in a cross-wise direction in relation to the longitudinal direction thereof (32), in addition to comprising at least one ultrasonic test head (46) which is directed at the bars (30). The chamber has a non-circular cross-section perpendicular to the longitudinal direction (32) of the bars (30) and the cross-section of the chamber is adapted to the profile of the bars (30) in such a way that the width of a gap (42) running between the bars (30) and the wall (40) of the chamber is substantially maintained.

Abstract: The invention relates to a device for inspecting pipes using ultrasound, in particular for inspecting the end regions of a pipe. Said device comprises at least one ultrasonic inspection head (38) with an inspection tank (24), which a) has a receiving chamber (26) that is designed to receive a coupling fluid, in particular water (27), b) forms an axial passage through which a pipe (20) that is to he inspected can be transported along an inspection line (28) relative to the inspection tank (24) c) has sealing elements at the front and rear (34, 36), said elements being adapted to the external diameter of the pipe (20) that is to be inspected and delimiting the receiving chamber (26), and d) contains the inspection head(s) (38) in such a way that only coupling fluid is present between the inspection head (38) and the pipe (20) that is to be inspected.