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Standard Practice for Radioscopic Examination of Weldments 焊接件射线检查的标准实施规程
发布日期: 2023-02-01
1.1 本规程涵盖了焊接件放射检查的统一程序。本规程中表达的要求旨在控制射线图像的质量,而不是用于控制焊缝的可接受性或质量。 1.2 本规程仅适用于放射检查设备的使用,其中图像最终显示在显示屏(监视器)上,供操作员评估。检查可记录下来,以备以后审查。它不适用于由计算机自动执行评估的全自动系统。 1.3 应在合同、采购订单、产品规范或图纸中规定放射范围、质量水平和验收标准。 1.4 这种做法可用于检测不连续性。这种做法也有助于从几个方向检查焊缝,例如垂直于焊缝表面和沿两个焊缝斜角。本实践中所述的射线透视技术为缺陷可检测性提供了充分的保证;然而,人们认识到,对于特殊应用,可能需要使用更严格要求的特定技术来提供额外的检测能力。 买方和供应商应就特定放射技术的使用达成一致。 1.5 单位- 以英寸-磅单位表示的值应视为标准值。括号中给出的SI单位仅供参考。 1.6 本标准并不旨在解决与其使用相关的所有安全问题(如有)。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践,并确定监管限制的适用性。 第节给出了具体的预防说明 7. . 1.7 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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。
1.1 This practice covers a uniform procedure for radioscopic examination of weldments. Requirements expressed in this practice are intended to control the quality of the radioscopic images and are not intended for controlling acceptability or quality of welds. 1.2 This practice applies only to the use of equipment for radioscopic examination in which the image is finally presented on a display screen (monitor) for operator evaluation. The examination may be recorded for later review. It does not apply to fully automated systems where evaluation is automatically performed by computer. 1.3 The radioscopic extent, the quality level, and the acceptance criteria to be applied shall be specified in the contract, purchase order, product specification, or drawings. 1.4 This practice can be used for the detection of discontinuities. This practice also facilitates the examination of a weld from several directions, such as perpendicular to the weld surface and along both weld bevel angles. The radioscopic techniques described in this practice provide adequate assurance for defect detectability; however, it is recognized that, for special applications, specific techniques using more stringent requirements may be needed to provide additional detection capability. The use of specific radioscopic techniques shall be agreed upon between purchaser and supplier. 1.5 Units— The values stated in inch-pound units are to be regarded as the standard. The SI units given in parentheses are for information only. 1.6 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. Specific precautionary statements are given in Section 7 . 1.7 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.
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