1.1 本规程涵盖了使用可见旋转激光二极管、管道和导管检查模拟或数字CCTV摄像机系统和图像处理软件对埋地管道变形进行安装后验证和验收的程序。应使用带有电缆距离计数器或车载距离编码器、旋转激光二极管和椭圆度测量软件的组合CCTV管道检查系统，根据责任承包机构的指示，对新的或现有的管道和导管进行管道测量和椭圆度确认测量。 本标准实践提供了激光轮廓测量方法的最低要求，以满足工程师、承包商、业主、监管机构和金融机构的需求。 1.2 本规程适用于所有类型的材料、所有类型的结构或形状。 1.3 本规程适用于重力流雨水管、排水沟、卫生下水道和直径为6的组合下水道 在里面至72 在里面(150 毫米至1800毫米 毫米）。 1.4 应根据IEC 60825对激光二极管进行测试、标记和认证，以符合美国对CDRH 2级或以下（不被视为危险）激光产品的要求，或证明其符合欧盟对2M级或以下激光产品的要求- 1或两者。 1.5 剖面分析过程可能需要实际进入管线、入口人孔和可能存在安全隐患的道路沿线作业。 1.6 本规程仅包括确定管道和导管椭圆度的检查要求，不包括完整检查所需的所有组件。本规程的用户应考虑本规程之外的其他检查项目，如接头间隙测量、土壤/水渗透、裂纹和孔洞测量、表面损伤评估、任何管道维修评估和腐蚀评估。 1.7 本标准实施规程不解决由于照明不当、灰尘、湿度、雾、管壁上的水分或水平/垂直偏移而导致的精度限制。应注意限制管道中影响检查准确性的环境因素。 1.8 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。 1.9 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。 然而，使用指定的激光轮廓仪（按照中的规定列出和标记）没有具体的安全隐患 1.3 ) . 1.10 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====== 4.1 激光轮廓评估是一种质量控制工具，用于识别和量化安装后的变形、物理损伤和其他管道异常，为确定工艺质量和符合项目规范提供手段和方法。激光轮廓功能包括: 4.1.1 结构形状、横截面积和缺陷的测量； 4.1.2 收集管道修复或更换设计所需的数据；和 4.1.3 修复、更换或新施工工艺验证后。 4.2 激光轮廓预验收和状态评估调查以清晰简洁的方式提供重要信息，包括但不限于验收前管道状态的图形和静止帧数字图像，从而提供安装质量和椭圆度百分比或变形、偏转或偏差程度的客观数据，这通常不可能通过心轴或仅CCTV进行检查。

1.1 This practice covers the procedure for the post installation verification and acceptance of buried pipe deformation using a visible rotating laser light diode(s), a pipeline and conduit inspection analog or digital CCTV camera system and image processing software. The combination CCTV pipe inspection system, with cable distance counter or onboard distance encoder, rotating laser light diode(s) and ovality measurement software shall be used to perform a pipe measurement and ovality confirmation survey, of new or existing pipelines and conduits as directed by the responsible contracting authority. This standard practice provides minimum requirements on means and methods for laser profiling to meet the needs of engineers, contractors, owners, regulatory agencies, and financing institutions. 1.2 This practice applies to all types of material, all types of construction, or shape. 1.3 This practice applies to gravity flow storm sewers, drains, sanitary sewers, and combined sewers with diameters from 6 in. to 72 in. (150 mm to 1800 mm). 1.4 The Laser Light Diode(s) shall be tested, labeled and certified to conform to US requirements for CDRH Class 2 or below (not considered to be hazardous) laser products or certified to conform to EU requirements for Class 2M or below laser products as per IEC 60825-1, or both. 1.5 The profiling process may require physical access to lines, entry manholes and operations along roadways that may include safety hazards. 1.6 This practice includes inspection requirements for determining pipeline and conduit ovality only and does not include all the required components of a complete inspection. The user of this practice should consider additional items outside this practice for inspection such as joint gap measurement, soil/water infiltration, crack and hole measurement, surface damage evaluation, evaluation of any pipeline repairs, and corrosion evaluation. 1.7 This standard practice does not address limitations in accuracy due to improper lighting, dust, humidity, fog, moisture on pipe walls or horizontal/vertical offsets. Care should be taken to limit environmental factors in the pipeline that affect accuracy of the inspection. 1.8 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. 1.9 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. There are no safety hazards specifically, however, associated with the use of the laser profiler specified (listed and labeled as specified in 1.3 ) . 1.10 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 ====== 4.1 Laser profiling assessment is a quality control tool for identifying and quantifying deformation, physical damage, and other pipe anomalies after installation, providing means and methods for determining the quality of workmanship and compliance with project specifications. Laser profiling capabilities include: 4.1.1 Measurement of the structural shape, cross sectional area and defects; 4.1.2 Collection of data needed for pipe rehabilitation or replacement design; and 4.1.3 Post rehabilitation, replacement or new construction workmanship verification. 4.2 A laser profile pre-acceptance and condition assessment survey provides significant information in a clear and concise manner, including but not limited to graphs and still frame digital images of pipe condition prior to acceptance, thereby providing objective data on the installed quality and percentage ovality, or degree of deformation, deflection or deviation, that is often not possible from an inspection by either a mandrel or only CCTV.