Testing sleeve welding
AssigneeGeorg Fischer Rohrleitungssysteme AG
InventorsJoerg Wermelinger, Riccardo Barbone, Paul Kaftan
Life of this patent
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Abstract
A method and device for the ultrasonic testing of a weld of an electric arc-welded sleeve (10) for plastic pipes (11), having the following steps: fastening a testing device (1) on the outer contour of the welded plastic pipe (11), comprising a circumferential fastening element (2) and a holder (3), the holder (3) preferably comprising a support (7), a carrier (8) and a gripper (9), and a coupling element with a recess, feeding a liquid, preferably water, into the recess (5) of the coupling element (4), wherein the recess (5) in the coupling element (4) is fully filled with the liquid, and a constant liquid column is maintained in the coupling element (4) during the ultrasonic testing in order to transmit the ultrasound.
Claims15
A method for the ultrasonic testing of a weld of an electric arc-welded sleeve (10) for plastic pipes (11), comprising:
- fastening a testing device (1) on the outer contour of the welded plastic pipe (11), the testing device including a circumferential fastening element (2), a holder (3), and a coupling element with a recess,
- feeding a liquid into the recess (5) of the coupling element (4),
- rotating the testing device around the plastic pipe, and
- wherein the recess (5) in the coupling element (4) is fully filled with the liquid, and a constant liquid column is maintained in the recess during the ultrasonic testing in the coupling element (4) in order to transmit the ultrasound.
A testing device (1) for ultrasonic testing of a weld of an electric arc-welded sleeve (10) for plastic pipes (11), comprising a circumferential fastening element (2), a holder (3) and a coupling element (4), the coupling element (4) being used for coupling the ultrasound into the weld, the holder (3) being the connection between the circumferential fastening element (2) and the coupling element (4), wherein the coupling element (4) comprises a continuous recess (5) in the central region and a compressible retaining element (6) is arranged on the lower side of the coupling element (4), the retaining element (6) being used to retain the liquid fed into the coupling element (4).
A testing device for testing of a circumferential weld on plastic pipes, comprising:
- chain having a plurality of links, the chain being configured to be a rotated about a major axis of the pipes;
- a coupling element having an upper surface and a lower surface, the coupling element having a recess extending therethrough from the upper surface to the lower surface;
- a retaining element on the lower surface of the coupling element, the retaining element being in the form of a sponge;
- a holder subassembly, the holder subassembly including:
- a support coupled to the chain between adjacent links;
- a gripper for gripping the coupling element;
- and
- an adjustment device having guide rods extending parallel to a major axis of the pipes, one end of the adjustment device being connected to the support and another and of the adjustment device being coupled to the gripper wherein the coupling element is longitudinally displaced from the chain;
- a liquid supply for delivering a liquid to the recess in the coupling element;
- and
- wherein the weld is ultrasonically tested through of the liquid in the recess, with the retaining element being configured to retain liquid in the recess.
Dependencies are inferred from the claim text.