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ASTM B548 is a standard test method for ultrasonic inspection of aluminum alloy plates used in pressure vessels. Here’s a closer look at the standard: 1. Overview of the standard Standard number: ASTM B548 2. Scope of application The method involves pulse-echo ultrasound inspection of aluminum alloy plates with a thickness equal to or greater than 0.500 inches (12.7 mm) used to manufacture pressure vessels. Ultrasonic testing is used to detect severe internal discontinuities such as cracks, cracks, and lay-ups parallel to the direction of the rolled surface and to ensure that only sheets with no non-conforming discontinuities are delivered. It is suitable for specific types of aluminum alloy plates, including but not limited to 1060, 1100, 3003, Alclad 3003, 3004, Alclad 3004, 5050, 5052, 5083, 5086, 5154, 5254, 5454, 5456, 5652, 6061 and Alclad 6061, etc. 3. Test principles and methods This method uses pulsed longitudinal waves for ultrasonic testing that are emitted and received by a search unit containing a combination of single crystals or multiple crystals with electrical interconnects. Ultrasonic testing detects defects by emitting ultrasonic waves to the specimen, which are reflected when they encounter the interface of different media. This method is suitable for detecting discontinuities such as cracks, cracks, and laminations inside the panel. Fourth, test precautions Test results can be influenced by a variety of factors, such as the condition of the inlet and back of the plate, the inclination of the ultrasonic beam relative to the inlet surface, and the performance characteristics of the test system. An accurate assessment of the size of the discontinuity may be limited by the variation in the beam characteristics in the search cell, so the size of the discontinuity determined by this method is considered an “apparent” or “estimated” size. This ultrasonic inspection method is not suitable as the sole indicator of the final quality and performance of the pressure vessel, but it can reliably control the plate quality to avoid failures in the vessel manufacturing process. Fifth, the field of application Ultrasonic inspection methods under the ASTM B548 standard are widely used in the manufacturing process of pressure vessels to ensure that the quality of aluminum alloy sheets used meets the relevant requirements, thereby improving the safety and reliability of pressure vessels. VI. Conclusions ASTM B548 is an important standard for ultrasonic inspection of aluminum alloy plates used in pressure vessels, providing a reliable means of testing for the manufacture of high-quality pressure vessels. In practical application, ultrasonic inspection should be carried out in strict accordance with the standard requirements to ensure that the quality of the plate meets the design requirements. At the same time, the limitations of ultrasonography should also be noted and evaluated comprehensively in combination with other testing methods.Huanickel related products strictly implement this standard. For more information about the standard and the corresponding product information, please contact Sinonickel [email protected] |