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.

Abstract: A method and a system including a welding device, an inspection device having an inspection head having two sensors, a controller, and a memory for assessing a butt weld of plastic pipes or fittings in a welding device.

Abstract: A method for inspecting a weld of plastic pipes by means of a data processing device, comprising: capturing and storing documents; monitoring and recording the installation and the implementation of the weld of the joint; producing a welding report, or adopting a welding report from the welding machine; testing the weld ultrasonically, wherein the test detects and stores the defects that are in the weld; wherein software is used to capture and store the documents, the welding report and the defects, more specifically the data on said defects, wherein an algorithm of the software is used to evaluate the stored documents, reports, defects and data on said defects, and to classify the welded joint as compliant or non-compliant with the requirements.

Abstract: Weld seam testing chain for testing a weld seam by means of ultrasound on two plastic tubes welded together at the ends, comprising standard chain links, wherein the standard chain links are hooked together to form the weld seam testing chain, and the chain can be lengthened or shortened individually, a sensor receptacle for accommodating the ultrasonic sensor, and an adjusting unit for the fine adjustment of the weld seam testing chain length, wherein the standard chain links have a hook on one side and a hook receptacle on the opposite side, thereby enabling the individual chain links to be hooked together.

Abstract: A method and system for detecting displacements in installed pipeline systems and identifying components and their properties, comprising: arranging/attaching a marker to at least one of the components of the installed pipeline system, recording/scanning/photographing the marker (3) and generating a baseline image of the initial state, assigning properties and data to and depositing them on the marker, storing the baseline image at a memory location, re-recording/re-scanning/re-photographing the marker, autonomously detecting the marker and comparing it with the stored baseline image of the corresponding marker, determining alterations or displacements of the marker, outputting determined values, wherein at least two markers are arranged such that they are recorded together on a baseline image.

Abstract: A method for inspecting a weld of plastic pipes by means of a data processing device, comprising: capturing and storing documents; monitoring and recording the installation and the implementation of the weld of the joint; producing a welding report, or adopting a welding report from the welding machine; testing the weld ultrasonically, wherein the test detects and stores the defects that are in the weld; wherein software is used to capture and store the documents, the welding report and the defects, more specifically the data on said defects, wherein an algorithm of the software is used to evaluate the stored documents, reports, defects and data on said defects, and to classify the welded joint as compliant or non-compliant with the requirements.

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.

Abstract: Weld seam testing chain for testing a weld seam by means of ultrasound on two plastic tubes welded together at the ends, comprising standard chain links, wherein the standard chain links are hooked together to form the weld seam testing chain, and the chain can be lengthened or shortened individually, a sensor receptacle for accommodating the ultrasonic sensor, and an adjusting unit for the fine adjustment of the weld seam testing chain length, wherein the standard chain links have a hook on one side and a hook receptacle on the opposite side, thereby enabling the individual chain links to be hooked together.

Abstract: A check valve (1) comprising a valve housing (2) in which a one-piece closing element (3) is present, which is arranged such that same can be displaced by the flow medium and contacts a profile seal (5) of a sealing section (7) in the closed position, wherein the closing element is guided by a bearing (10), wherein the bearing is disposed concentrically in the valve housing by ribs (11), wherein the closing element comprises a zone A (34) in which the outer contour comprises a flow-optimized shape and a zone B (35) in which the outer contour comprises a domed shape, and the zones A and B are disposed one after the other and transition smoothly into each other.

Abstract: A joining device for electrofusion of at least one end of a pipe to a fitting is provided which includes a fitting of a polymeric material and a collar adapted to receive the end of the pipe. The collar is fabricated from a conductive polymer composite material and positioned within the fitting. A connector for connecting the collar to a source of current may be provided which may be integral to the fitting. Likewise, the collar may be integral to the fitting. All three of the connector, collar and fitting are preferably an integral unit. A method of making the joining device and a method of using the joining device are also provided.