1.1 本规程提供了使用工业射线照相胶片对焊接件进行射线照相检查的统一程序。本规程中提出的要求旨在控制射线照相图像的质量，而不是控制焊缝的可接受性或质量。 1.2 射线照相范围、质量水平和验收标准应在合同、采购订单、产品规范或图纸中规定。 1.3 本文所述的射线照相技术为缺陷检测能力提供了充分的保证； 然而，人们认识到，对于特殊应用，可能需要使用比规定要求更严格或更不严格的特定技术。在这些情况下，替代射线照相技术的使用应经买方和供应商同意（另见第节） 4. ). 1.4 以英寸-磅为单位的数值应视为标准值。 1.5 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。 （有关更具体的安全预防信息，请参阅第节。） 9 .) 1.6 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。

1.1 This practice provides a uniform procedure for radiographic examination of weldments using industrial radiographic film. Requirements expressed in this practice are intended to control the quality of the radiographic images and are not intended for controlling acceptability or quality of welds. 1.2 The radiographic extent, the quality level, and the acceptance criteria to be applied shall be specified in the contract, purchase order, product specification, or drawings. 1.3 The radiographic techniques stated herein provide adequate assurance for defect detectability; however, it is recognized that, for special applications, specific techniques using more or less stringent requirements may be required than those specified. In these cases, the use of alternative radiographic techniques shall be as agreed upon between purchaser and supplier (also see Section 4 ). 1.4 The values stated in inch-pound units are to be regarded as standard. 1.5 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. (For more specific safety precautionary information, see Section 9 .) 1.6 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.