API 1104, Welding Pipelines and Related Facilities. Nineteenth Edition, includes for the first time a systematic approach for the implementation of the Ultrasonic Testing (UT) method for inspection of pipeline girth welds. The need to include Ultrasonic Testing as an alternative method for weld inspection comes as the result of three main factors, 1) the need for flaw sizing to meet the requirements of Appendix A, 2) the need to mitigate the safety and environmental concerns that are present when radiography and film processing are used, and 3) the rapid acceptance of automated ultrasonic systems within the pipeline construction industry. Paragraph 11.4 of API 1104 provides the requirements for developing an inspection procedure as well as a methodology for qualifying both the procedure and the UT system. Once qualified, the UT method can then be applied as an acceptable quality control tool for the inspection of pipeline girth welds.
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机译：API 1104，焊接管道及相关设施。第十九版，第一次包括实施超声波检测（UT）检验管道环环焊缝的系统方法。需要包括超声波测试作为焊接检查的替代方法，因为三个主要因素的结果，1）需要缺陷尺寸以满足附录A，2）需要减轻安全和环境问题的需要使用造影和薄膜处理时，3）在管道建设行业内自动超声波系统的快速接受。 API 1104的第11.4段提供了开发检查程序以及用于限定程序和UT系统的方法的要求。一旦合格，UT方法然后可以应用于用于检查管道环形焊缝的可接受的质量控制工具。
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