1.1 本规程涵盖了对连接锻造铁或铝合金材料的特定焊接结构进行超声波A扫描检查以检测焊接不连续性的技术（见 注1 ). 规定了使用脉冲波的反射方法。描述了利用搜索单元通过耦合剂膜或水柱接触的手动技术。 1.2 根据具体的焊接配置，本实践使用角梁或直梁，或两者兼有。不包括角焊缝和点焊等特殊几何形状的实践。 本规程旨在用于0.250至8英寸的厚度。（6.4至203 mm）。 注1: 本实践基于铁和铝合金的经验。如果可以制定证明超声波束可以成功穿透特定材料和焊缝的参考标准，则可以使用本规程检查其他金属材料。 注2: 有关更多相关信息，请参阅实践 E317 术语 E1316 ，并练习 E587 . 1.3 以英寸-磅为单位的数值应视为标准值。 括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 3.1 本实施规程中描述的焊缝超声波检测技术旨在为焊缝和热影响区内的内部和表面不连续性提供一种焊缝检测方法。该实践仅限于检查锻造或锻造材料中的特定焊缝几何形状。 3.2 该技术为内部和表面不连续性的焊接检验提供了一种实用方法，非常适合于过程质量控制任务。 该方法特别适用于检测垂直于声束的平面的不连续性。当必须严格评估孔隙度和夹渣时，可以使用其他无损检测。 3.3 当超声波检查用作焊缝验收的基础时，制造商和买方应就使用的具体参考标准和限制达成一致。参考标准示例见第节 7. . 应编写一份详细的焊接检查程序，说明允许的不连续性限制，并达成一致。

1.1 This practice covers techniques for the ultrasonic A-scan examination of specific weld configurations joining wrought ferrous or aluminum alloy materials to detect weld discontinuities (see Note 1 ). The reflection method using pulsed waves is specified. Manual techniques are described employing contact of the search unit through a couplant film or water column. 1.2 This practice utilizes angle beams or straight beams, or both, depending upon the specific weld configurations. Practices for special geometries such as fillet welds and spot welds are not included. The practice is intended to be used on thicknesses of 0.250 to 8 in. (6.4 to 203 mm). Note 1: This practice is based on experience with ferrous and aluminum alloys. Other metallic materials can be examined using this practice provided reference standards can be developed that demonstrate that the particular material and weld can be successfully penetrated by an ultrasonic beam. Note 2: For additional pertinent information see Practice E317 , Terminology E1316 , and Practice E587 . 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 3.1 The techniques for ultrasonic examination of welds described in this practice are intended to provide a means of weld examination for both internal and surface discontinuities within the weld and the heat-affected zone. The practice is limited to the examination of specific weld geometries in wrought or forged material. 3.2 The techniques provide a practical method of weld examination for internal and surface discontinuities and are well suited to the task of in-process quality control. The practice is especially suited to the detection of discontinuities that present planar surfaces perpendicular to the sound beam. Other nondestructive examinations may be used when porosity and slag inclusions must be critically evaluated. 3.3 When ultrasonic examination is used as a basis of acceptance of welds, there should be agreement between the manufacturer and the purchaser as to the specific reference standards and limits to be used. Examples of reference standards are given in Section 7 . A detailed procedure for weld examination describing allowable discontinuity limits should be written and agreed upon.