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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 Issued by: United States Society for Testing and Materials (ASTM) Current Version: ASTM B548-03(2017) (note that newer versions may exist over time) Applications: This standard is primarily used for aluminum alloy plates with a thickness equal to or greater than 0.500 inches (12.7 mm) that are used in the manufacture of pressure vessels. Second, the inspection methods and requirements Ultrasonography Techniques: Pulse-echo ultrasound is used. Ultrasonic testing is used to detect total internal discontinuities such as cracks, cracks, and lamination in the direction parallel to the rolled surface. Ensure that only panels that do not have rejectable discontinuities can be delivered. Applicable aluminium alloy plates: 1060, 1100, 3003, 3003, 3004, 3004, 5050, 5052, 5083, 5086, 5154, 5254, 5454, 5456, 5652, 6061 and 6061 aluminum alloy plates. Ultrasonic waveform: Applies only to ultrasonic tests using pulsed longitudinal waves, which are emitted and received by a search unit containing a combination of single crystals or electrically interconnected polycrystals. Ultrasonic testing using transmissive transmission or angular beam techniques is not included. Inspection conditions and standards: A variety of factors are taken into account during the inspection, such as the conditions at the inlet and back of the panel, the inclination of the ultrasonic beam relative to the inlet surface, and the performance characteristics of the test system, which can affect the reliability of the inspection results. An accurate assessment of the size of the discontinuity can also be significantly limited by the variation in the beam characteristics in the search cell. Therefore, discontinuous dimensions determined by the test procedures outlined in this method are considered “obvious” or “estimated” to identify the limited quantitative values measured. Usage Scenarios: This test method shall be used when a contract, purchase order, or reference plate specification requires an ultrasonic examination as specified herein. 3. Significance and use As a kind of non-destructive testing, ultrasonic examination has the advantages of not destroying the measured object, high sensitivity, low detection cost and fast speed. It can detect small defects and internal defects that cannot be observed by the naked eye, and is of great significance to ensure the quality of aluminum alloy plates for pressure vessels. However, it is important to note that this inspection method is not suitable as a sole indicator of the final quality and performance of a pressure vessel due to the large number of interactive variables in the test system that can adversely affect ultrasonic test results. But it can provide reliable sheet quality control to avoid failures in the container manufacturing molding process. 4. Other precautions This standard is not intended to address all safety issues associated with its use. It is the user’s responsibility to establish appropriate safety and health practices and to determine the applicability of regulatory restrictions prior to use. In view of the continuous updating and improvement of the standard, it is recommended to refer to the latest version of the ASTM B548 standard in practical applications.Huanickel?related?products?strictly?implement?this?standard.?For?more?information?about?the?standard?and?the?corresponding?product?information,[email protected] |