Mannesmann Aktiengesellschaft

Mannesmannrohren-werke Ag

Mannesmannufer Aktiengesellschaft

Krautkramer Gmbh

Karl Deutsch Pruf-und Messgeratebau

Richard Seifert & Co. Gmbh & Co. Kg

Rich. Seifert & Co. Gmbh & Co. Kg

Karl Ries

Dieter Lather

Kurt Hannoschock

Gunter Simoneit

Klaus-Uwe Jannsen

Wolfgang Terschuren

Dieter Kaiser

Ulrich Forstermann

Peter Moller

Krsto-Marijan Rozic

Gunter Basler

Hans-Peter Schafer

Heinz Schneider

Harri Haacke

Reinhard Pawelletz

Heinz-Jurgen Boms

Werner Grabendorfer

Klaus-Uwe Janssen

Harry Kuhn

Kurt Weinschenk

Herbert Vogt

Harald Sperl

Mesa Quaye

An apparatus for X-ray testing of pipes following ultrasonic testing includes a reversible roller track for telescoping a pipe upon a cantilever arm which can be moved up and down on a stand and carrying an endless belt with resilient U-shaped holders for supporting film strips to be moved into the pipe and adjacent to suspected defects. Reversal of the belt drive permits removal of the exposed film strips as the pipe is moved out.

Film strip positioning for X-ray testing of pipes

Ultrasonic test equipment for testing the welding seam a thick wall includes transducers arranged in tandem and along the welding seam, whereby a tandem pair inspects in any instance two surface-near zones (inner and outer surface) as well as an interior zone. One of the transducers of the pair participates in a function test. Two pairs cover the same zones, but from opposite sides.

Ultrasonic testing of weld seams of pipes for detecting transversely

Equipment for ultrasonic testing structural materials includes transducers and test electronics normally operated in sequential test cycles each cycle including the generation of a test pulse to be sent into the test object and subsequently, upon interaction with the test object, return signals (echos) are received and processed, e.g. as to transit time, amplitude, contour, etc. Self-checking is carried out in three phases. One phase uses simulated receiver signals for operatively disconnected transducers, to be processed by the electronics as if they were echos; a second phase uses simulated transducer inputs and analogous processing and a third phase uses a reference body as test body simulation for conduction of 'tests'. The results of signal processing are compared with reference signals and correlation of deviations and absence of deviations is used to isolate malfunctions.

Automatic self-checking of test equipment

The test head includes its own calibration device in form of a wire or a bore in front of the transducing surface so that a distinguishable calibration echo is always available.

Test head for ultrasonic testing of structural material

A transport belt is constructed from a toothed belt as base with individual carrier elements separated by spacers. These elements each have a shallow trough with central indent and tapered base.

Conveyor belt for filmstrip positioning

The welding seam of a pipe is located by means of ultrasonic transducers and echo pulses responding particularly to rather minute distance differences on account of the convex contour of the seam and its elevation above the continued contour of the unmodified parts being welded together. A two or a three transducer configuration is used.

Locating a welding seam

A tubular sleeve with reflector body, water ingress and venting openings is used to produce specific echoes of a test signal launched by an inserted transducer. Amplitude and transit times of the element serve as a transferable standard.

Initializing ultrasonic test equipment with a particular reference

An ultrasonic test system for inspection of structural material includes a test electronics for controlling a plurality of ultrasonic transmitter and receiver channels. This test electronics is operated by sequencing the system through the several channels, but the evaluating circuit is common to the receive channels. The duration of the test, timing of launching, timing of beginning receiving response signals, time and duration of looking windows for identifying and timing particular responses, and comparison data, all are operating and acquisition parameters for operating the electronics. These parameters are furnished from external sources and are programmable and exchangeable, e.g., from test to test. At least some of these parameters are updated on the basis of data as acquired during the test.

Method of adjusting ultrasonic test systems

The system includes a plurality of individually selectable transmitter and receiver channels, a common controller and a common acquisition unit constructed to operate on the basis of parameters which are furnished to the controller and the unit as input signals. Some of the parameters are held in a memory and are withdrawn on the basis of test identification numbers to set up the acquisition unit. The acquisition unit has a transit time counter and two parallel operating looking window generators and several comparator stages, operating under utilization of such parameters. The data as acquired by a test, are accumulated and processed to determine new parameters, if necessary, and feeding them to the memory. The controller conducts the tests on the basis of sequencing the system through a group of test identification numbers, and provides also launch delay and receiving delays on the basis of externally, updatable parameters.

System for nondestructive, ultrasonic testing of test objects

Ultrasonic response signals resulting from interaction of a test pulse with the structural material are recognized by dynamically tracking the noise level and adding thereto a fixed level; a response signal to be recognized must exceed the resulting variable threshold level.

Recognizing ultrasonic response signals during testing of structural

A plurality of water tanks hold a plurality of ultrasonic transducers, each providing a different angle of incidence for ultrasonic radiation for a tube or pipe passing through the tank. Water of a specific temperature is fed to the particular tank being used and in conjunction with a particularly oriented transducer, a particular test angle of refraction is established. Through a particular range of different transducer orientations in conjunction with a temperature range from about 5.degree. to 40.degree. C., a rather wide range of possible refraction angles can be established.

System for inspecting tubes or pipes by means for ultrasonics

An ultrasonic transducer is held in a tubular holder which in turn is axially placed in a mount. A frame depends from a cover of a gimbal mounted container for coupler fluid and the mount is clamped to the frame at an adjustable angle so that the transducer axis always intersects the same point. Ball rollers on the cover position the container in relation to a pipe to be tested so that said point is located on the pipe's surface. The transducer holder has a shoulder onto which one may seat a calibration standard.

Mount for ultrasonic test head

Ultrasonic echo signals from the rear wall boundary are used to track looking windows for similar signals during a subsequent test cycle as well as for detection of flaw echos, with emphasis on a distinction between end of flaw detection and beginning first rear wall echo looking windows.

Ultrasonic testing

A pipe is reeled onto and over a stand having several positioning rollers to serve as reference for the pipe inspection devices. These devices include a plurality of transducers for longitudinal flaw detection arranged in pairs and along opposite sides of the seam, the transducers being in water tanks hung in gimbals on individual swing arms. Four additional transducers for transverse flaw detection are arranged in a tank hung also in gimbals for positioning the tanks so that it engages the seam while the transducers are aligned with the seam. A gimbal hung tank with two edge probing transducers engages lastly the pipe seam.

Apparatus for ultrasonic inspection of the welding seam of large pipes

The seam of a pipe is tested sequentially from various directions and with differently directed test beams to search for differently oriented defects, and repeatedly for stepwise testing each portion of the same.

Growing community of inventors

Mulheim, Germany

Karl Ries