海底管线环焊缝的双丝焊接及无损检测

Double Wire Welding and Nondestructive Testing of Girth Welds of Submarine Pipeline

介绍了双丝焊接技术和自动超声波检测技术在海底管线环焊缝焊接施工中的应用。指出,双丝焊接不仅可以提高焊接效率和焊接质量,而且有利于改善焊接接头的拉伸性能和断裂韧性;自动超声波检测技术具有检测效率高和成本低的特点,满足了海底管线铺设时效性要求和焊缝质量控制要求。

The application of double wire welding and automatic ultrasonic testing （AUT） in constructing submarine pipeline was introduced. The result indicates that double wire welding technique can advance the efficiency of welding and quality of welding seam, and improve the tensile strength and fracture toughness of the welded joints. AUT has the characters of high efficiency and low costs of testing, which can meet the requirement of time limitation and quality control of welding seam in constructing submarine pipeline.