Patent application number | Description | Published |
20090095087 | Ultrasonic probe, ultrasonic flaw detection method, and ultrasonic flaw detection apparatus - Minute flaws present on the interior of a high (t/D) metal pipe having a ratio (t/D) of the wall thickness t to the outer diameter D of greater than 15% is carried out with high accuracy and certainty by angle beam flaw detection without an accompanying decrease in detection efficiency or cost increase. This is an ultrasonic probe which, as viewed from the center of a high (t/D) metal pipe, performs flaw detection of the metal pipe by obliquely impinging ultrasonic waves from a transducer on the metal pipe and generating refracted longitudinal waves and refracted transverse waves which are propagated inside the metal pipe. The front end portion of the transducer has at least a portion with an asymmetrically curved shape having a radius of curvature which progressively increases from one end towards the other end of the front end portion. The ultrasonic probe is disposed with respect to a metal pipe such that the end having the smaller radius of curvature is positioned on the side away from the direction of propagation of refracted waves, the end having a larger radius of curvature thereof is positioned on the side in the direction of propagation of refracted waves, and angle beam flaw detection is carried out under such conditions that incident waves are generated which generate refracted longitudinal waves which do not reach the inner surface of the metal pipe and refracted transverse waves which are focused on the inner surface of the metal pipe. | 04-16-2009 |
20090217763 | Ultrasonic probe, ultrasonic testing equipment, ultrasonic testing method, and manufacturing method of seamless pipe or tube - The ultrasonic testing method according to the invention includes the steps of arranging an ultrasonic probe | 09-03-2009 |
20090282921 | Method for evaluating fastening state of threaded joint of pipes or tubes and method for fastening threaded joint of pipes or tubes using the method - There is provided a method capable of evaluating a fastening state of a threaded joint that is used as a joint of pipes or tubes such as OCTG with a high degree of accuracy even after being fastened and a method for fastening a threaded joint of pipes or tubes using the evaluating method. The present invention provides a method for evaluating a fastening state of a threaded joint of pipes or tubes including a pin having an external thread part, a metal seal part, and a shoulder part on an outer peripheral surface, and a box having an internal thread part, a metal seal part, and a shoulder part corresponding to each part of the pin on an inner peripheral surface and being fastened with the pin. The evaluating method according to the present invention is characterized by transmitting and receiving an ultrasonic wave to and from a plurality of locations along an axial direction of the threaded joint in at least one of the internal thread part, the metal seal part, and the shoulder part of the box; detecting echo intensities for the plurality of locations; and comparing the echo intensities detected for the plurality of locations to determine whether the fastening state of the threaded joint is good or bad. | 11-19-2009 |
20100005846 | Ultrasonic testing method and manufacturing method of seamless pipe or tube - A circumferential angle of incidence αi of an ultrasonic wave transmitted from an ultrasonic probe | 01-14-2010 |
20100107766 | Ultrasonic testing method of threaded joint of pipes or tubes - There is provided a method for detecting an abnormal portion (defect, non-adhering portion, and seized portion) lying at a contact region between each part of a pin and each part of a box forming a threaded joint to be used as a joint of pipe or tubes such as OCTG. This invention provides an ultrasonic testing method of a threaded joint of pipes or tubes including a pin having an external thread part, a metal seal part, and a shoulder part on an outer peripheral surface, and a box having an internal thread part, a metal seal part, and a shoulder part corresponding to each part of the pin on an inner peripheral surface and being fastened with the pin by way of a lubricant. The method according to the present invention comprising the steps of: transmitting and receiving ultrasonic waves to and from a plurality of locations along an axial direction of the threaded joint in at least one of the internal thread part, the metal seal part, and the shoulder part of the box; detecting echo intensities and reception times of echoes for the plurality of locations; and detecting an abnormal portion in the threaded joint based on axial directional distribution of the echo intensities and axial directional distribution of reception times of the echoes. | 05-06-2010 |
20110088476 | ULTRASONIC TESTING METHOD AND EQUIPMENT THEREFOR - A ultrasound flaw probing device ( | 04-21-2011 |
20110113885 | ULTRASONIC TESTING METHOD AND EQUIPMENT THEREFOR - An ultrasonic testing equipment includes a linear array ultrasonic probe in which a plurality of transducers are arranged in a direction orthogonal to the rolling direction of a test object and a signal processing unit. The signal processing unit executes following (1) to (6). (1) Generating an aperture synthetic image of testing signals of each section of the test object. (2) Generating a maximum value distribution of testing signals in the arrangement direction of transducers. (3) Calculating the width of a defect in each section based on the maximum value distribution. (4) Generating a maximum value distribution of the testing signals in the rolling direction based on the maximum value distribution of a plurality of sections of the test object. (5) Calculating the length of the defect based on the maximum value distribution of the testing signals in the rolling direction. (6) Calculating the area of the defect based on the calculated defect length and the calculated defect width of each section. | 05-19-2011 |
20110239770 | METHOD AND APPARATUS FOR ULTRASONIC TESTING OF WELD ZONES - Provided are an ultrasonic testing method and an ultrasonic testing apparatus capable of accurately detecting flaws present in a weld zone of a test object, such as a welded pipe, regardless of the position of the flaws. An ultrasonic testing apparatus | 10-06-2011 |
20110283798 | ULTRASONIC TESTING METHOD AND APPARATUS - An ultrasonic testing apparatus | 11-24-2011 |
20120067127 | METHOD OF EVALUATING FASTENING STATE OF THREADED JOINT OF PIPES OR TUBES, METHOD FOR FASTENING THREADED JOINT OF PIPES OR TUBES, AND APPARATUS FOR EVALUATING FASTENING STATE OF THREADED JOINT OF PIPES OR TUBES - The present invention provides a method which allows simply, easily and accurately evaluating the fastening state of shoulder parts of a threaded joint for use as a joint of pipes or tubes, such as OCTG, during fastening or after fastening. The fastening state evaluation method for a threaded joint | 03-22-2012 |
20120067129 | ULTRASONIC TESTING APPARATUS FOR PIPE OR TUBE END PORTION - An ultrasonic testing apparatus for a pipe end portion, which enables accurate ultrasonic testing, comprises an ultrasonic probe disposed under the pipe end portion. The probe | 03-22-2012 |
20120167690 | ULTRASONIC PROBE, ULTRASONIC TESTING EQUIPMENT, AND ULTRASONIC TESTING METHOD - The ultrasonic testing method according to the invention includes the steps of arranging an ultrasonic probe | 07-05-2012 |
20130276540 | ULTRASONIC TESTING APPARATUS FOR PIPE OR TUBE END PORTION AND METHOD OF SETTING INITIAL POSITION OF PROBE HOLDER - An ultrasonic testing apparatus includes an ultrasonic probe disposed under an end portion of a pipe laid in the horizontal direction to face the pipe end portion. The probe transmits ultrasonic waves to the end portion of the pipe and receives the ultrasonic waves therefrom. A probe holder housing the probe includes a coupling medium reserver part which surrounds a space between the probe and the end portion of the pipe to contain a coupling medium W. The coupling medium reserver part includes a part body | 10-24-2013 |